CN110053326B - Hot-melt elastomer modified asphalt waterproof coiled material and preparation method thereof - Google Patents
Hot-melt elastomer modified asphalt waterproof coiled material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a hot-melt elastomer modified asphalt waterproof coiled material and a preparation method thereof. The upper surface modified asphalt layer of the waterproof roll is formed by high-compactness modified asphalt, and the lower surface modified asphalt layer is formed by alternately coating the high-compactness modified asphalt with the cross section of an inverted isosceles trapezoid in the thickness direction of the waterproof roll and the low-viscosity modified asphalt with the cross section of an isosceles triangle; the high-compactness modified asphalt comprises the following components in parts by weight: 100-140 parts of asphalt, 0-10 parts of softener, 10-30 parts of SBS, 10-20 parts of thickener, 3-8 parts of modifier, 1-5 parts of defoamer and 20-40 parts of filler; low viscosity modified asphalt: 80-120 parts of asphalt, 10-30 parts of softener, 5-15 parts of SBS, 15-25 parts of modifier, 2-6 parts of viscosity reducer and 30-60 parts of filler. The waterproof coiled material has excellent low-temperature flexibility, easy fusibility and water resistance.
Description
The application is a divisional application of a patent application with the application date of 2017, 5 and 27, and the application number of 201710395330.9, and the invention name of the invention is 'hot-melt elastomer modified asphalt waterproof coiled material and a preparation method thereof'.
Technical Field
The invention relates to the field of building materials, in particular to a hot-melt elastomer modified asphalt waterproof coiled material and a preparation method thereof.
Background
SBS thermoplastic elastomers first appeared in the united states in the early sixties of the twentieth century and SBS modified asphalt was soon developed in france and named elastic asphalt. SBS modifiers are rapidly spread and spread to japan, usa, etc. in europe because of their various excellent characteristics. Currently, SBS remains the first choice for modifying asphalt materials. The combination of the SBS elastomer modified asphalt and the filament polyester non-woven fabric ensures that the performance of the SBS modified asphalt waterproof coiled material is more perfect and spans the ranks of high-grade waterproof materials, and the SBS modified asphalt waterproof coiled material is widely applied to the waterproof field. In germany, france, finland, norway and other countries, the SBS modified asphalt waterproof coiled material accounts for more than 70% of the market of waterproof materials. In the united states and japan, the market share is 30% or more, and there is a tendency to increase year by year.
The existing SBS thermoplastic elastomer modified asphalt coiled material is prepared by respectively coating modified asphalt on the upper surface and the lower surface of a base and then covering the surfaces of the upper layer of modified asphalt and the lower layer of modified asphalt with isolating layers, and the SBS thermoplastic elastomer modified asphalt coiled material is adhered to the surface of a construction base layer by carrying out hot melting on the lower surface modified asphalt of the asphalt coiled material in the construction process, so that the base layer is protected from water.
However, the SBS thermoplastic elastomer modified asphalt coiled material product has high heat resistance, and high temperature construction is required during construction, and the asphalt coiled material needs to be heated uniformly to fully adhere and fully pave the asphalt coiled material. But because some constructors operate the unnormal or not professional when waterproof construction, lead to the pitch coiled material to be heated inhomogeneous phenomenon at the work progress, the coiled material overall structure can be destroyed or be heated too lightly and appear coiled material and basic unit not sticky or the phenomenon of air-laid when the pitch coiled material is heated too greatly to because expend with heat and contract with cold the effect, with the not firm coiled material of basic unit bonding the basic unit break away from will appear, the temperature changes the back in spring, the seepage phenomenon appears in large tracts of land house. Meanwhile, due to various environmental factors or human factors, the asphalt coiled material product is frequently damaged by being stepped on manually during construction, when the surface of the coiled material is subjected to violent or sudden external force, the quality of the waterproof layer of the coiled material is easily damaged, so that the original waterproof performance of the coiled material is reduced or lost, and when the temperature of the damaged part is lower, the damaged part on the coiled material is more serious, and the waterproof layer on the surface of the coiled material cracks. Therefore, it is an urgent need to solve the technical problem of developing a modified asphalt waterproof coiled material with excellent hot-melt property, low-temperature flexibility and waterproof property.
Disclosure of Invention
In view of this, the embodiment of the invention provides a hot-melt elastomer modified asphalt waterproof coiled material and a preparation method thereof, and mainly aims to solve the technical problems that the modified asphalt waterproof coiled material is poor in hot-melt property, poor in low-temperature flexibility and poor in water resistance.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
on one hand, the embodiment of the invention provides a hot-melt elastomer modified asphalt waterproof coiled material, which sequentially comprises the following components from one surface of the waterproof coiled material, which is contacted with air, to one surface of the waterproof coiled material, which is adhered to a construction base layer: the upper surface isolation layer, the upper surface modified asphalt layer, the base layer, the lower surface modified asphalt layer and the lower surface isolation layer; the upper surface modified asphalt layer is formed by coating high-compactness modified asphalt, and the lower surface modified asphalt layer is formed by alternately coating high-compactness modified asphalt with an inverted isosceles trapezoid cross-sectional view in the thickness direction of the waterproof roll and low-viscosity modified asphalt with an isosceles triangle cross-sectional view in the thickness direction of the waterproof roll;
the high-compactness modified asphalt comprises the following components in parts by weight: 100-140 parts of asphalt, 0-10 parts of softener, 10-30 parts of SBS, 10-20 parts of thickener, 3-8 parts of modifier, 1-5 parts of defoamer and 20-40 parts of filler;
the low-viscosity modified asphalt comprises the following components in parts by weight: 80-120 parts of asphalt, 10-30 parts of softener, 5-15 parts of SBS, 15-25 parts of modifier, 2-6 parts of viscosity reducer and 30-60 parts of filler.
Preferably, the high-compactness modified asphalt consists of the following components in parts by weight: 110-130 parts of asphalt, 0-8 parts of softener, 15-25 parts of SBS, 13-18 parts of thickener, 5-8 parts of modifier, 2-5 parts of defoamer and 25-40 parts of filler.
Preferably, the low-viscosity modified asphalt comprises the following components in parts by weight: 90-110 parts of asphalt, 15-30 parts of softener, 8-12 parts of SBS, 18-22 parts of modifier, 3-5 parts of viscosity reducer and 35-50 parts of filler.
Preferably, the asphalt in the high-compactness modified asphalt component and the asphalt in the low-viscosity modified asphalt component are at least one of No. 200 petroleum asphalt, No. 90 petroleum asphalt and No. 70 petroleum asphalt which are classified by penetration;
the softening agent in the high-compactness modified asphalt component and the softening agent in the low-viscosity modified asphalt component are respectively selected from at least one of naphthenic oil, third-line engine oil and aromatic oil.
Preferably, the molecular structures of the SBS in the high-compactness modified asphalt component and the SBS in the low-viscosity modified asphalt component are both linear and/or star-shaped;
the modifier in the high-compactness modified asphalt component and the modifier in the low-viscosity modified asphalt component are both selected from at least one of SBR, hydrogenated petroleum resin, polypropylene and APAO;
the filler in the high-compactness modified asphalt component and the filler in the low-viscosity modified asphalt component are selected from at least one of light calcium powder, heavy calcium powder and talcum powder.
Preferably, the thickener in the high-compactness modified asphalt component and the thickener in the low-viscosity modified asphalt component are both selected from at least one of organic bentonite, alumino-silicate and cellulose ether;
the viscosity reducer in the high-compactness modified asphalt component and the viscosity reducer in the low-viscosity modified asphalt component are both a sasobit and/or a hypotrochoff viscosity reducer FHC;
the defoaming agent in the high-compactness modified asphalt component and the defoaming agent in the low-viscosity modified asphalt component are selected from at least one of dimethyl silicone oil, polysiloxane and carbon black.
Preferably, the thickness of the hot-melt elastomer modified asphalt waterproof coiled material is 4 mm;
the thickness of the lower surface modified asphalt layer is 1.0mm-1.3 mm;
the thickness of the upper surface modified asphalt layer is 1.2mm-1.8 mm;
the base layer of the tire is a polyester felt, and the gram weight of the polyester felt is 250g/m2—280g/m2The thickness is 1.2mm-1.5 mm;
the viscosity of the low-viscosity modified asphalt at 180 ℃ is 115dPa.s-185 dPa.s.
On the other hand, the embodiment of the invention provides a preparation method of the hot-melt elastomer modified asphalt waterproof coiled material, which comprises the following steps: simultaneously coating asphalt with the same material on the upper surface and the lower surface of the tire base to form an upper surface modified asphalt layer and a lower surface modified asphalt layer with the same material, and respectively coating isolation materials on the surfaces of the upper surface modified asphalt layer and the lower surface modified asphalt layer to form an upper surface isolation layer and a lower surface isolation layer; preparing raw materials according to the formula of the high-compactness modified asphalt and the low-viscosity modified asphalt;
mixing asphalt, a softening agent, SBS, a modifier, a thickening agent, a defoaming agent and a filler, heating to 180 ℃, stirring and blending for 5-6 hours to form high-compactness modified asphalt;
mixing asphalt, a softening agent, SBS, a modifier, a viscosity reducer and a filler, heating to 180 ℃, stirring and blending for 5-6 hours to form low-viscosity modified asphalt;
coating the high-compactness modified asphalt on the upper surface of the base to form an upper surface modified asphalt layer;
adjusting and controlling coating equipment to coat the high-compactness modified asphalt on the lower surface of the tire base, enabling the high-compactness modified asphalt to be in a continuous three-dimensional inverted isosceles trapezoid body on the lower surface of the tire base by using a coating roller, forming an unfilled space with an isosceles triangle-shaped section between every two adjacent three-dimensional inverted isosceles trapezoid bodies, and immediately cooling the lower surface after molding to enable the high-compactness modified asphalt to be cooled and shaped; adjusting a coating roller of a coating device to turn over a tire base so that the coating device can conveniently fill low-viscosity modified asphalt into the unfilled space, so that the low-viscosity modified asphalt is in a continuous three-dimensional isosceles triangle on the lower surface of the tire base, and cooling and forming; the inverted isosceles trapezoid bodies and the isosceles triangle bodies are alternately arranged and combined on the lower surface of the base to form a lower surface modified asphalt layer.
Preferably, the process of coating the high-compactness modified asphalt on the upper surface of the tire base is divided into two times, the first thick coating is defoamed, and the second thin coating is thicknessed.
Preferably, the specific process of adjusting and controlling the coating equipment to coat the high-compactness modified asphalt on the lower surface of the tire base first comprises the following steps: coating the high-compactness modified asphalt on the lower surface of the tire base in a trapezoidal coating manner while performing secondary thin coating thickness setting in the process of coating the high-compactness modified asphalt on the upper surface of the tire base; the coating roller is a forming roller with tooth marks.
Compared with the prior art, the invention has the beneficial effects that:
aiming at the technical problems of poor low-temperature flexibility of the upper surface and poor hot melting of the lower surface of the hot-melt modified asphalt waterproof material, the invention reasonably designs the formula of high-compactness modified asphalt used for the upper surface and the formula of low-viscosity modified asphalt used for the lower surface, and the upper surface modified asphalt layer coated by the high-compactness modified asphalt has low-temperature flexibility, so that the damage resistance of the contact surface of a coiled material and the environment is improved; in the structure of the lower surface, a trapezoidal body formed by high-compactness modified asphalt and a triangular body formed by low-viscosity modified asphalt are adopted, and the trapezoidal body and the triangular body are alternately arranged and combined to form a lower surface modified asphalt layer, so that the lower surface modified asphalt layer has high fusibility and self-repairability; the raw material formula and the structural design of the coiled material improve the waterproof performance of the waterproof coiled material, improve the damage resistance of the upper surface of the waterproof coiled material, improve the fusibility of the lower surface of the coiled material and improve the construction efficiency.
Drawings
FIG. 1 is a flow chart of a process for preparing a hot-melt elastomer modified asphalt waterproof coiled material provided by an embodiment of the invention;
fig. 2 is a sectional view of a waterproof roll in the thickness direction thereof according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a lower modified asphalt layer of a waterproof roll according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of a lower modified asphalt layer of a waterproofing membrane according to an embodiment of the present invention.
Description of reference numerals:
1. upper surface isolation layer, 2, upper surface modified asphalt layer, 3, child basic unit, 4, lower surface isolation layer, 5, the inverted isosceles trapezoid cross-section on lower surface modified asphalt layer, 6, the isosceles triangle cross-section on lower surface modified asphalt layer.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, technical solutions, features and effects according to the present invention will be given with preferred embodiments. The particular features, structures, or characteristics may be combined in any suitable manner in the embodiments or embodiments described below.
Example 1
Preparing the components of the high-compactness modified asphalt according to a raw material formula: 90 parts of 90# asphalt, 40 parts of 200# asphalt, 22 parts of SBS (swallowed 4402), 16 parts of organic bentonite, 3 parts of SBR, 3 parts of APAO, 3.4 parts of carbon black and 38 parts of talcum powder, wherein the asphalt, the softener, the SBS, the modifier, the thickener, the defoamer and the filler are mixed, heated to 180 ℃ for shearing and blending, and the high-compactness modified asphalt is formed after controlled stirring and blending for 5 hours;
preparing low-viscosity modified asphalt according to a raw material formula: 98 parts of No. 90 asphalt, 24 parts of modified asphalt, 10 parts of SBS (swallow 1401), 12 parts of SBR, 10 parts of hydrogenated petroleum resin, 5 parts of sea wave viscosity reducer FHC and 34 parts of talcum powder, wherein the asphalt, the softening agent, the SBS, the modifier, the viscosity reducer and the filler are mixed and heated to 180 ℃, and are stirred and blended for 5 hours to form low-viscosity modified asphalt;
as shown in the process flow of figure 1, the high-compactness modified asphalt is coated on a polyester felt 3 (the gram weight is 250 g/m) in two times2，1.2mm in thickness) is subjected to thick coating defoaming for the first time, and the thickness is determined through thin coating for the second time, so that an upper surface modified asphalt layer 2 is formed; controlling a forming roller with tooth marks to coat the high-compactness modified asphalt on the lower surface of the polyester felt 3 while performing the second thin coating for thickness determination, and performing rapid cooling and forming to enable the high-compactness modified asphalt to be continuous three-dimensional inverted isosceles trapezoid bodies on the lower surface of the polyester felt 3, wherein an unfilled space with an isosceles triangle section is formed between every two adjacent three-dimensional inverted isosceles trapezoid bodies, as shown in fig. 3 and 4, after the high-compactness modified asphalt is cooled and formed, turning over the polyester felt to facilitate coating equipment to fill the unfilled space with the low-viscosity modified asphalt and simultaneously performing rapid cooling and forming to enable the low-viscosity modified asphalt to be continuous three-dimensional isosceles triangle bodies on the lower surface of the polyester felt 3; the inverted isosceles trapezoid bodies and the isosceles triangle bodies are alternately arranged and combined on the lower surface of the polyester felt to form a lower surface modified asphalt layer, a polyethylene material is coated on the surface of the upper surface modified asphalt layer to form an upper surface isolation layer 1, a polyethylene material is coated on the surface of the lower surface modified asphalt layer to form a lower surface isolation layer 4, after all coating processes are finished, the hot-melt elastomer modified asphalt waterproof coiled material is obtained by molding and rolling, the thickness of the coiled material is 4mm, and the cross section of the coiled material in the thickness direction is shown in figure 2; the results of the tests on the physical and chemical properties of the waterproof roll are shown in table 1.
TABLE 1 mechanical Properties of the waterproofing membranes of example 1
Example 2
Preparing the components of the high-compactness modified asphalt according to a raw material formula: 77 parts of No. 90 asphalt, 50 parts of No. 200 asphalt, 3 parts of three-way reducing engine oil, 23 parts of SBS (swallowed 4402), 13 parts of organic bentonite, 3 parts of SBR, 3 parts of APAO, 1.3 parts of carbon black and 40 parts of talcum powder, wherein the asphalt, the softener, the SBS, the modifier, the thickener, the defoamer and the filler are mixed, heated to 180 ℃ for shearing and blending, and the high-compactness modified asphalt is formed after controlled stirring and blending for 5.5 hours;
preparing low-viscosity modified asphalt according to a raw material formula: 70 parts of 90# asphalt, 40 parts of 200# asphalt, 12 parts of reduced kerosene, 10 parts of SBS (swallow 1401), 12 parts of SBR, 10 parts of hydrogenated petroleum resin, 5 parts of sea wave viscosity reducer FHC and 34 parts of talcum powder, wherein the asphalt, the softening agent, the SBS, the modifier, the viscosity reducer and the filler are mixed and heated to 180 ℃, and are stirred and blended for 5 hours to form low-viscosity modified asphalt;
as shown in the process flow of figure 1, the high-compactness modified asphalt is coated on a polyester felt 3 (the gram weight is 250 g/m) in two times2，1.3mm in thickness) is subjected to thick coating defoaming for the first time, and the thickness is determined through thin coating for the second time, so that an upper surface modified asphalt layer 2 is formed; controlling a forming roller with tooth marks to coat the high-compactness modified asphalt on the lower surface of a polyester felt 3 while performing secondary thin coating thickness setting, and performing rapid cooling and forming to enable the high-compactness modified asphalt to be continuous three-dimensional inverted isosceles trapezoid bodies on the lower surface of the polyester felt, wherein an unfilled space with an isosceles triangle-shaped section is formed between every two adjacent three-dimensional inverted isosceles trapezoid bodies, as shown in fig. 3 and 4, after the high-compactness modified asphalt is cooled and formed, turning over the polyester felt to facilitate coating equipment to fill low-viscosity modified asphalt into the unfilled space and simultaneously performing rapid cooling and forming to enable the low-viscosity modified asphalt to be continuous three-dimensional isosceles triangle-shaped bodies on the lower surface of the polyester felt; the inverted isosceles trapezoid bodies and the isosceles triangle bodies are alternately arranged and combined on the lower surface of the polyester felt to form a lower surface modified asphalt layer, a polyethylene material is coated on the surface of the upper surface modified asphalt layer to form an upper surface isolation layer, a polyethylene material is coated on the surface of the lower surface modified asphalt layer to form a lower surface isolation layer, and after all coating processes are finished, the hot-melt elastomer modified asphalt waterproof coiled material is obtained by molding and rolling, wherein the coiled material is thick4mm, a cross section thereof in the thickness direction of the coil as shown in FIG. 2; the results of the tests on the physical and chemical properties of the waterproof roll are shown in table 2.
TABLE 2 mechanical Properties of the waterproofing membranes of example 2
Example 3
Preparing the components of the high-compactness modified asphalt according to a raw material formula: 114 parts of No. 90 asphalt, 20 parts of No. 200 asphalt, 6 parts of trilinear oil, 22 parts of SBS (swallowed 4402), 16 parts of organic bentonite, 2.5 parts of SBR, 4 parts of APAO, 3.4 parts of carbon black and 40 parts of talcum powder, and the asphalt, the softener, the SBS, the modifier, the thickener, the defoamer and the filler are mixed, heated to 180 ℃ for shearing and blending, and stirred and blended for 5.5 hours under control to form high-compactness modified asphalt;
preparing low-viscosity modified asphalt according to a raw material formula: 84 parts of 90# asphalt, 20 parts of 200# asphalt, 18 parts of reduced kerosene, 10 parts of SBS (swallow 1401), 10 parts of SBR, 13 parts of hydrogenated petroleum resin, 5 parts of sea wave viscosity reducer FHC and 38 parts of talcum powder, wherein the asphalt, the softening agent, the SBS, the modifier, the viscosity reducer and the filler are mixed and heated to 180 ℃, and are stirred and blended for 5 hours to form low-viscosity modified asphalt;
as shown in the process flow of figure 1, the high-compactness modified asphalt is coated on a polyester felt 3 (the gram weight is 250 g/m) in two times2，1.4mm in thickness), defoaming by thick coating for the first time, and fixing the thickness by thin coating for the second time to form an upper surface modified asphalt layer 2; controlling a forming roller with tooth marks to coat the high-compactness modified asphalt on the lower surface of the polyester felt 3 while performing the second thin coating for thickness determination, and rapidly cooling and forming to enable the high-compactness modified asphalt to be continuous three-dimensional inverted isosceles trapezoid bodies on the lower surface of the polyester felt, wherein an unfilled space with an isosceles triangle-shaped section is formed between every two adjacent three-dimensional inverted isosceles trapezoid bodies, as shown in fig. 3 and 4, after the high-compactness modified asphalt is cooled and formed, turning over the polyester felt to facilitate the coating equipment to fill the unfilled space with low-viscosity modified asphaltCooling and forming rapidly to make the low viscosity modified asphalt form a continuous three-dimensional isosceles triangle on the lower surface of the polyester felt; the inverted isosceles trapezoid bodies and the isosceles triangle bodies are alternately arranged and combined on the lower surface of the polyester felt to form a lower surface modified asphalt layer, a polyethylene material is coated on the surface of the upper surface modified asphalt layer to form an upper surface isolation layer, a polyethylene material is coated on the surface of the lower surface modified asphalt layer to form a lower surface isolation layer, and after all coating processes are finished, the hot-melt elastomer modified asphalt waterproof coiled material is obtained by molding and rolling, wherein the thickness of the coiled material is 4mm, and the cross section of the coiled material in the thickness direction is shown in figure 2; the results of the tests on the physical and chemical properties of the waterproof roll are shown in table 3.
TABLE 3 mechanical Properties of the waterproofing membranes of example 3
Example 4
Preparing the components of the high-compactness modified asphalt according to a raw material formula: 97 parts of No. 90 asphalt, 30 parts of No. 200 asphalt, 3 parts of minus two-line oil, 22 parts of SBS (swallowed 4402), 16 parts of organic bentonite, 3 parts of SBR, 3 parts of APAO, 3.4 parts of carbon black and 40 parts of talcum powder, and the asphalt, the softener, SBS, the modifier, the thickener, the defoamer and the filler are mixed, heated to 180 ℃ for shearing and blending, and stirred and blended for 5.5 hours under control to form high-compactness modified asphalt;
preparing low-viscosity modified asphalt according to a raw material formula: 69 parts of No. 90 asphalt, 30 parts of No. 200 asphalt, 15 parts of minus mineral oil, 8 parts of SBS (LG501), 13 parts of SBR, 12 parts of hydrogenated petroleum resin, 3 parts of sea wave viscosity reducer FHC and 36 parts of talcum powder, wherein the asphalt, the softener, the SBS, the modifier, the viscosity reducer and the filler are mixed and heated to 180 ℃, and are stirred and blended for 5 hours to form low-viscosity modified asphalt;
as shown in figure 1The high-compactness modified asphalt is coated on a polyester felt 3 (the gram weight is 250 g/m) twice2，1.2mm in thickness) is subjected to thick coating defoaming for the first time, and the thickness is determined through thin coating for the second time, so that an upper surface modified asphalt layer 2 is formed; controlling a forming roller with tooth marks to coat the high-compactness modified asphalt on the lower surface of a polyester felt 3 while performing secondary thin coating thickness setting, and performing rapid cooling and forming to enable the high-compactness modified asphalt to be continuous three-dimensional inverted isosceles trapezoid bodies on the lower surface of the polyester felt, wherein an unfilled space with an isosceles triangle-shaped section is formed between every two adjacent three-dimensional inverted isosceles trapezoid bodies, as shown in fig. 3 and 4, after the high-compactness modified asphalt is cooled and formed, turning over the polyester felt to facilitate coating equipment to fill low-viscosity modified asphalt into the unfilled space and simultaneously performing rapid cooling and forming to enable the low-viscosity modified asphalt to be continuous three-dimensional isosceles triangle-shaped bodies on the lower surface of the polyester felt; the inverted isosceles trapezoid bodies and the isosceles triangle bodies are alternately arranged and combined on the lower surface of the polyester felt to form a lower surface modified asphalt layer, a polyethylene material is coated on the surface of the upper surface modified asphalt layer to form an upper surface isolation layer, a polyethylene material is coated on the surface of the lower surface modified asphalt layer to form a lower surface isolation layer, and after all coating processes are finished, the hot-melt elastomer modified asphalt waterproof coiled material is obtained by molding and rolling, wherein the thickness of the coiled material is 4mm, and the cross section of the coiled material in the thickness direction is shown in figure 2; the results of the tests on the physical and chemical properties of the waterproof roll are shown in table 4.
TABLE 4 mechanical Properties of the waterproofing membranes of example 4
The waterproof performance of the modified asphalt waterproof coiled material is improved from 0.3MPa/60min to 0.6MPa/120min, the waterproof performance of the product is obviously improved, and the subsequent waterproof construction design such as selection of the material reduces the use of engineering materials, reduces the construction frequency and realizes energy conservation and emission reduction.
According to the invention, the low-temperature flexibility of the upper surface of the prepared modified asphalt waterproof coiled material is obviously improved by introducing modifiers such as SBS, SBR, a softening agent, a viscosity reducer and the like, the low-temperature flexibility of the product is improved to be qualified in a-25 ℃ (50mm bent rod) test, to be qualified in a-30 ℃ (50mm bent rod) test and a-25 ℃ (30mm bent rod) test, the low-temperature flexibility of the product is obviously improved, the low-temperature stress resistance of the product is improved, the capability of the product of being not damaged at low temperature is improved under the same external force action, and the adaptability of the product is improved. The 50mm bent rod is mainly subjected to related tests according to GB18242, the lowest low-temperature test value of a product in the standard is-25 ℃ without cracks, and the product is improved to-30 to show low-temperature flexibility; compared with a 50mm bent rod, the 30mm bent rod has the advantages that the radius is reduced, the curvature is increased, the stress borne by the product in the bending process is increased, the product is subjected to a 30mm bent rod test at the original specified test temperature, and the product is remarkably stronger in stress resistance.
The modified asphalt waterproof coiled material has certain self-healing performance under the condition of 60 ℃, micro-cracks generated in the construction process and formed due to improper protection measures after the construction are finished can be self-healed to a certain extent in summer, and the problem of water resistance and micro-exposure in the life process is solved.
According to the invention, the SBR is introduced into the modified asphalt, so that the prepared waterproof coiled material is subjected to a nail-stem water tightness test on the position with the minimum thickness deviation of the two mixed asphalts at 60 ℃, and the test is qualified after 2 h; the omitted empty pavement in the construction process and the adhesion in the winter maintenance process are separated, self-repairing can be formed in the summer environment, and the problem of local empty pavement is solved.
According to the modified asphalt waterproof coiled material, the introduction of the defoaming agent and the thickening agent reduces bubbles introduced in the asphalt modification process, and the compactness of the product is improved.
As shown in fig. 2, 3 and 4, the modified asphalt waterproofing membrane of the present invention has a self-structural change, for example, the modified asphalt layer on the lower surface is not coated with a single material, and is not designed to be a common planar sandwich structure, for example, a design structure with a rectangular cross section in the thickness direction of the membrane; according to the invention, two different modified asphalts are coated on the lower surface of the waterproof coiled material, one modified asphalt with high compactness can keep the performances of the original waterproof, weather-proof, low-temperature and flexible performances, and the other modified asphalt with low viscosity can reduce the overall viscosity of the lower surface modified asphalt layer and improve the fusibility of the waterproof coiled material; the cross section of the structure of the lower surface modified asphalt layer of the waterproof roll designed by the invention in the thickness direction of the roll is formed by alternately arranging inverted isosceles trapezoids and isosceles triangles, the inverted isosceles trapezoids are coated with high-compactness modified asphalt, two adjacent inverted isosceles trapezoids form an unfilled space of the isosceles triangle, the isosceles triangle is filled with low-viscosity modified asphalt, and a combined layer in which the trapezoids and the triangular bodies are tightly connected and alternately arranged is formed on the lower surface of the whole polyester felt. The high-compactness modified asphalt is adopted to coat the material in an inverted isosceles trapezoid shape, namely the upper bottom edge of the trapezoid is longer than the lower bottom edge, the longer upper bottom edge is tightly attached to the polyester felt, the shorter lower bottom edge is tightly attached to the lower isolation layer, the bottom edge of the triangle coated by the low-viscosity modified asphalt is tightly attached to the lower isolation layer, and the contact area between the low-viscosity modified asphalt material and the construction base layer is larger.
By the coating mode, the low-viscosity modified asphalt has larger bonding area with the isolation layer in the construction process, so that the surface is easily melted by hot melting in the construction process, the construction performance is improved, and the construction energy consumption is reduced; meanwhile, the low-viscosity modified asphalt and the construction base layer have larger areas, so that the low-viscosity modified asphalt can optimally embody the self-repairing function in the subsequent self-repairing process and meet the expected design requirement; high compactedness modified asphalt material is great with polyester felt area of contact, when arch or obvious hard thing appear in the basic unit, high compactedness modified asphalt material is great with polyester felt area of contact, can block that hard thing sees through the matrix and influence the waterproof layer performance, simultaneously because high compactedness modified asphalt is trapezoidal long limit and child base course bonding, trapezoidal minor face bonds with the basic unit, when receiving the exogenic action, because high compactedness modified asphalt is higher cohesive strength, the coiled material can not separate with matrix and basic unit, ensure the whole adhesive property of waterproofing membrane.
As shown in fig. 2, 3 and 4, the process effect of the trapezoidal and triangular alternate molding designed by the invention can be realized by controlling the shape of the sizing roller, the shape and the depth of the groove body formed on the roller and the like. For example, the shaping roller has tooth marks, the shape of the tooth marks can be designed according to actual needs, the shaping roller is designed to be trapezoidal, namely, the trapezoidal cavity of the die is filled with high-compactness modified asphalt, and the trapezoidal body is formed according to the shape of the die after coating; the tooth trace of the sizing roller can be designed according to the requirement, the tooth trace is provided with a square cavity or a cylindrical cavity, and a square body or a cylinder is correspondingly obtained. The shaping roller die and the technological parameters can be selected from the prior art according to actual needs.
The inventor discovers that the environment of the upper surface (upstream surface) and the lower surface (construction surface) of the waterproof coiled material is different in the hot melting construction process of the modified asphalt waterproof coiled material, because of the lattice of the modified asphalt on the upper surface and the tyre base, the lower surface of the waterproof coiled material is in a closed environment which is relatively stable to the environment, and because the upper surface needs to be exposed to the air directly or a protective layer, the upper surface is influenced by the external environment, the upper surface of the waterproof coiled material needs higher performance to interfere with the environment, the aging rate is reduced, and the product is kept in a normal waterproof state; the lower surface has a relatively low aging rate, so that the structure of the coiled material can be adjusted to optimize the product performance; therefore, the invention provides a hot-melt elastomer modified asphalt waterproof coiled material, which resists environmental interference by adopting high-compactness modified asphalt to form an upper surface modified asphalt layer, and improves the whole waterproof property and the easy-melting property of the coiled material by adopting a trapezoidal and triangular combined layer formed by coating the high-compactness modified asphalt and the low-viscosity modified asphalt and the high-compactness modified asphalt and the low-viscosity modified asphalt.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the above claims.
Claims (7)
1. The utility model provides a hot melt type elastomer modified asphalt waterproofing membrane, follow waterproofing membrane extremely with the one side of air contact waterproofing membrane includes in proper order with the one side that construction basic unit pasted: the waterproof roll comprises an upper surface isolation layer, an upper surface modified asphalt layer, a base course layer, a lower surface modified asphalt layer and a lower surface isolation layer, and is characterized in that the upper surface modified asphalt layer is formed by coating high-compactness modified asphalt, and the lower surface modified asphalt layer is formed by alternately coating high-compactness modified asphalt with a cross section in the thickness direction of the waterproof roll being in an inverted isosceles trapezoid shape and low-viscosity modified asphalt with a cross section in the thickness direction of the waterproof roll being in an isosceles triangle shape;
the high-compactness modified asphalt comprises the following components in parts by weight: 110-130 parts of asphalt, 0-8 parts of softener, 15-25 parts of SBS, 13-18 parts of thickener, 5-8 parts of modifier, 2-5 parts of defoamer and 25-40 parts of filler;
the low-viscosity modified asphalt comprises the following components in parts by weight: 90-110 parts of asphalt, 15-30 parts of softener, 8-12 parts of SBS, 18-25 parts of modifier, 3-5 parts of viscosity reducer and 35-50 parts of filler;
the viscosity of the low-viscosity modified asphalt at 180 ℃ is 115dPa.s-185 dPa.s;
the modifier in the high-compactness modified asphalt component and the modifier in the low-viscosity modified asphalt component are both selected from at least one of SBR, hydrogenated petroleum resin, polypropylene and APAO.
2. The hot-melt elastomer modified asphalt waterproofing membrane according to claim 1, wherein the asphalt in the high-compactness modified asphalt component and the asphalt in the low-viscosity modified asphalt component are at least one of No. 200 petroleum asphalt, No. 90 petroleum asphalt and No. 70 petroleum asphalt, which are classified by penetration;
the softening agent in the high-compactness modified asphalt component and the softening agent in the low-viscosity modified asphalt component are respectively selected from at least one of naphthenic oil, third-line engine oil and aromatic oil.
3. The hot-melt elastomer modified asphalt waterproofing membrane according to claim 1, wherein the molecular structures of SBS in the high-compactness modified asphalt component and SBS in the low-viscosity modified asphalt component are both linear and/or star-shaped;
the filler in the high-compactness modified asphalt component and the filler in the low-viscosity modified asphalt component are selected from at least one of light calcium powder, heavy calcium powder and talcum powder.
4. The hot-melt elastomer modified asphalt waterproofing membrane according to claim 1, wherein the thickener in the high-compactness modified asphalt component is at least one selected from the group consisting of organic bentonite, alumino-silicate and cellulose ether;
the viscosity reducer in the low-viscosity modified asphalt component is a salobide and/or hypotubide FHC;
the defoaming agent in the high-compactness modified asphalt component is at least one selected from dimethyl silicone oil, polysiloxane and carbon black.
5. A preparation method of a hot-melt elastomer modified asphalt waterproof coiled material comprises the following steps: coating asphalt on the upper surface and the lower surface of the tire base to form an upper surface modified asphalt layer and a lower surface modified asphalt layer, and respectively coating isolation materials on the surfaces of the upper surface modified asphalt layer and the lower surface modified asphalt layer to form an upper surface isolation layer and a lower surface isolation layer; characterized in that raw materials are prepared according to the formula of the high-compactness modified asphalt and the low-viscosity modified asphalt of claim 1;
mixing asphalt, a softening agent, SBS, a modifier, a thickening agent, a defoaming agent and a filler, heating to 180 ℃, stirring and blending for 5-6 hours to form high-compactness modified asphalt;
mixing asphalt, a softening agent, SBS, a modifier, a viscosity reducer and a filler, heating to 180 ℃, stirring and blending for 5-6 hours to form low-viscosity modified asphalt;
coating the high-compactness modified asphalt on the upper surface of the base to form an upper surface modified asphalt layer;
adjusting and controlling coating equipment to coat the high-compactness modified asphalt on the lower surface of the tire base, enabling the high-compactness modified asphalt to be in a continuous three-dimensional inverted isosceles trapezoid body on the lower surface of the tire base by using a coating roller, forming an unfilled space with an isosceles triangle-shaped section between every two adjacent three-dimensional inverted isosceles trapezoid bodies, and immediately cooling the lower surface after molding to enable the high-compactness modified asphalt to be cooled and shaped; adjusting a coating roller of a coating device to turn over a tire base so that the coating device can conveniently fill low-viscosity modified asphalt into the unfilled space, so that the low-viscosity modified asphalt is in a continuous three-dimensional isosceles triangle on the lower surface of the tire base, and cooling and forming; the inverted isosceles trapezoid bodies and the isosceles triangle bodies are alternately arranged and combined on the lower surface of the base to form a lower surface modified asphalt layer.
6. The preparation method of the hot-melt elastomer modified asphalt waterproof coiled material as claimed in claim 5, wherein the high-compactness modified asphalt is coated on the upper surface of the base in two times, the first thick coating is defoamed, and the second thin coating is thicknessed.
7. The preparation method of the hot-melt elastomer modified asphalt waterproof coiled material according to claim 6, wherein the specific process of adjusting and controlling the coating equipment to coat the high-compactness modified asphalt on the lower surface of the base is as follows: coating the high-compactness modified asphalt on the lower surface of the tire base in a trapezoidal coating manner while performing secondary thin coating thickness setting in the process of coating the high-compactness modified asphalt on the upper surface of the tire base; the coating roller is a forming roller with tooth marks.
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| CN109849452B (en) * | 2018-11-20 | 2021-06-29 | 苏州卓宝科技有限公司 | Modified asphalt waterproof coiled material and preparation method thereof |
| CN109735124A (en) * | 2019-01-09 | 2019-05-10 | 临沂市临河防水材料有限公司 | A kind of production technology of heat molten type waterproof roll |
| CN112745765A (en) * | 2020-12-29 | 2021-05-04 | 深圳市卓宝科技股份有限公司 | Hot-melt rubber asphalt waterproof coating and preparation method and application thereof |
| CN112832469A (en) * | 2021-03-01 | 2021-05-25 | 山东普文特建材有限公司 | Pre-wet paving anti-sticking anti-water-crossing waterproof material and preparation method thereof |
| CN113528083A (en) * | 2021-06-23 | 2021-10-22 | 北新禹王防水科技(广东)有限公司 | Low-temperature-formed hot-melt coiled material and preparation method thereof |
| CN114350275B (en) * | 2022-01-11 | 2023-10-17 | 江苏贝施特防水科技有限公司 | Super-cohesive SBS elastomer modified asphalt waterproof coiled material and preparation method thereof |
| CN116145436A (en) * | 2022-12-30 | 2023-05-23 | 青岛东方雨虹建筑材料有限公司 | Modified asphalt waterproof coiled material with repairing function and preparation method thereof |
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Also Published As
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| CN110093044A (en) | 2019-08-06 |
| CN110079109B (en) | 2021-08-06 |
| CN110053326A (en) | 2019-07-26 |
| CN110093044B (en) | 2021-08-06 |
| CN107266917A (en) | 2017-10-20 |
| CN107266917B (en) | 2019-05-17 |
| CN110079109A (en) | 2019-08-02 |
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