CN115109390A - Composition for preparing thermal-oxidative-aging-resistant epoxy asphalt and preparation method thereof - Google Patents
Composition for preparing thermal-oxidative-aging-resistant epoxy asphalt and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a composition for preparing thermal-oxidative-aging-resistant epoxy asphalt and a preparation method thereof, wherein the epoxy asphalt comprises epoxy asphalt and an antioxidant, wherein the epoxy asphalt comprises an epoxy asphalt A component, an epoxy asphalt B component and an epoxy asphalt C component, the epoxy asphalt A component is bisphenol A epoxy resin, the epoxy asphalt B component is a long-carbon-chain anhydride curing agent, the epoxy asphalt C component is No. 50 matrix asphalt or No. 70 matrix asphalt, the antioxidant is 1010 antioxidant, and the oxidation resistance of the epoxy asphalt material can be obviously improved by using a small amount of the antioxidant; the antioxidant has wide sources and low cost, can be embedded into a three-dimensional network structure in the epoxy asphalt, can eliminate free radicals generated by active groups in the self-oxidation aging process of the asphalt phase, prevents the reaction of the free radicals and oxygen molecules, can effectively slow down the self-oxidation aging of the asphalt phase, and can reduce the material cost.
Description
Technical Field
The invention relates to the technical field of road building materials, in particular to a composition for preparing thermal-oxidative-aging-resistant epoxy asphalt and a preparation method thereof.
Background
Epoxy asphalt is a high-performance paving material realized by epoxy resin crosslinking reaction. Due to excellent performance, the epoxy asphalt is widely applied to key engineering projects such as large-span steel bridge decks, expressways, airport pavement and the like. Although the prior epoxy asphalt material can improve the service performance of the pavement structure, the degree of influence of the environment is not negligible. The prior research results show (DOI: https:// doi.org/10.1016/j.jclepro.2022.130482; https:// doi.org/10.1080/14680629.2008.9690129;10.3969/j.issn.1671-1815.2019.12.049;10.1061/(ASCE) MT.1943-5533.0004408), in an epoxy asphalt system, the aging of an asphalt phase and the post-curing of a resin phase can cause the performance degradation of an epoxy asphalt material, thereby affecting the service life of an epoxy asphalt pavement structure; under the action of thermal oxidation aging, the oxidation degree of the asphalt material is more obvious than that of epoxy resin materials, so that the oxygen aging degree of the epoxy asphalt material with higher asphalt content is serious, the deformation resistance and the fatigue resistance are obviously reduced, and the excellent service performance of the epoxy asphalt can not be reflected. In addition, the effect of environmental weathering influence is particularly obvious in some special areas and mixed material structures, for example, the oxidation degree of the pavement is greatly increased in the Hainan area which is in a high-temperature environment for a long time; for example, a mastic macadam (SMA) structure and a drainage Open Grading (OGFC) large-aperture drainage structure have larger gaps (even up to 20 percent), so that the contact area of the epoxy asphalt mixture and oxygen is greatly increased, and the structure generates larger environmental aging.
The prior documents report more patents about anti-aging schemes of asphalt and resin materials, and do not propose about an anti-oxidation scheme of epoxy asphalt.
Disclosure of Invention
Aiming at the problems, the invention provides thermal-oxidative-aging-resistant epoxy asphalt and a preparation method thereof, and is different from the conventional epoxy asphalt material, the thermal-oxidative-aging-resistant epoxy asphalt is combined with an anti-aging agent, the overall heat resistance of the material is improved by adopting an epoxy resin curing system with a high proportion, and meanwhile, a hindered phenol antioxidant 1010 is introduced, the thermal stability and the excellent compatibility of the antioxidant 1010 are utilized, the thermal oxidative aging resistance of the epoxy asphalt is improved, the post curing of the epoxy resin system and the oxidative degradation of asphalt components are prevented, and the formed epoxy asphalt material not only has excellent road performance, but also has excellent thermal oxidative aging resistance, and the service life of a pavement structure is prolonged. Meanwhile, the system can widen the application scene of the epoxy asphalt material, so that the epoxy asphalt material has a prospect of being applied to the pavement of tropical and special concrete structures, and has a certain popularization value.
The invention is realized by the following technical scheme: the composition for preparing the thermal-oxidative-aging-resistant epoxy asphalt comprises epoxy asphalt and an antioxidant, wherein the epoxy asphalt comprises an epoxy asphalt A component, an epoxy asphalt B component and an epoxy asphalt C component, and the epoxy asphalt comprises the following components in parts by mass:
5-25 parts of an epoxy asphalt A component,
38-50 parts of epoxy asphalt B component,
20 to 33.75 parts of epoxy asphalt C component,
0.1-1 part of antioxidant;
the component A of the epoxy asphalt is bisphenol A type epoxy resin, the component B of the epoxy asphalt is a long-carbon-chain anhydride type curing agent, and the component C of the epoxy asphalt is No. 50 matrix asphalt or No. 70 matrix asphalt; the antioxidant is 1010 antioxidant and is used for replacing part of asphalt.
Preferably, the antioxidant is physically fused.
Preferably, the components are respectively as follows according to the mass portion ratio:
25 parts of an epoxy asphalt A component,
38.5 to 50 portions of epoxy asphalt B component,
28.8 to 33.75 portions of epoxy asphalt C component,
0.15-0.55 part of antioxidant.
Preferably, the components are respectively as follows according to the mass portion ratio:
25 parts of an epoxy asphalt A component,
38.5 to 50 portions of epoxy asphalt B component,
28.8 to 33.75 portions of epoxy asphalt C component,
0.138 to 0.5 portion of antioxidant.
Preferably, the components are respectively as follows according to the mass portion ratio:
20 parts of an epoxy asphalt A component,
40 parts of an epoxy asphalt B component,
33.75 parts of an epoxy asphalt C component,
0.15 part of antioxidant.
As another aspect of the present invention, the present invention provides a method for preparing an epoxy asphalt of a thermal oxygen aging resistant type, comprising the steps of,
step 1: firstly, heating the epoxy asphalt component C to 140 ℃ of 100-;
step 2: adding the component B of the epoxy asphalt into the product obtained in the step (1), and dispersing and stirring until the components are uniformly mixed to obtain a cured product liquid containing the antioxidant;
and step 3: and (3) adding the component A of the epoxy asphalt into the product obtained in the step (2), keeping the temperature at 100-120 ℃, and uniformly stirring to obtain the epoxy asphalt with the thermal-oxidative-aging resistance.
Preferably, in step 2, the dispersion stirring is performed at a stirring speed of 500-.
The invention has the beneficial effects that:
(1) the dosage of the antioxidant is 0.138-0.897%, and is obviously reduced compared with 0.5-5% of the dosage of the conventional common antioxidant, so that the epoxy asphalt has excellent thermal-oxidative-aging resistance; even 0.138 to 0.5 percent of antioxidant can greatly improve the heat, oxygen and aging resistance of the epoxy asphalt.
In general, the more asphalt without aging, the more it hinders the curing degree of the epoxy resin curing system, but results in lower strength. In the prior art, the selection and the amount control of the antioxidant are based on the requirement of an antioxidant effect, the stable and excellent antioxidant component is replaced by a trace amount of easily oxidized asphalt component, so that the asphalt and the antioxidant can obstruct the curing degree of an epoxy resin curing system through physical separation, an isolation effect is effectively achieved, the melting point of the antioxidant is 115-fold at 118 ℃, the solid state and semi-cured morphology are maintained below 80 ℃, and the problem of low strength caused by excessive asphalt in the prior art is solved. A small amount of antioxidant hinders the post-crosslinking reaction of the epoxy resin phase under the action of thermal oxygen through the physical isolation effect, thereby reducing the post-curing process of the epoxy resin phase, effectively slowing down the oxidation hardening of the epoxy asphalt material and improving the thermal oxygen aging resistance of the epoxy asphalt material.
(2) The small amount of antioxidant in the invention can obviously improve the oxidation resistance of the epoxy asphalt material and can reduce the material cost.
(3) The epoxy resin component has unobvious post-curing reaction, has low influence of thermal oxidation aging, and can slow down the influence of thermal oxidation on the epoxy asphalt;
according to the existing research results, in the service process of the epoxy asphalt material, the process of asphalt phase components degraded by thermal oxygen is far higher than the post-curing aging process of an epoxy resin phase system. In the preparation method, the antioxidant with excellent thermal stability is firstly doped into the C-component matrix asphalt material to ensure that the antioxidant is fully dissolved in the asphalt phase, so that the antioxidant capacity of the asphalt phase is improved, and the influence on the integral antioxidant performance of the epoxy asphalt caused by obvious volatilization of the asphalt phase due to oxidative degradation is prevented. Secondly, in the preparation of materials by a high-speed dispersion machine, the antioxidant is excessively fused in an epoxy resin system due to excessively high stirring speed to influence the early-stage chemical curing reaction, and the antioxidant is not well compatible with the epoxy asphalt due to excessively low stirring speed, so that the antioxidant is uniformly dispersed in the epoxy asphalt material system and has an important antioxidant function by setting reasonable rotating speed and stirring time.
(4) The antioxidant adopted in the invention has wide sources, low cost and excellent antioxidant property, can be embedded into a three-dimensional network structure in the epoxy asphalt after preparation, can eliminate free radicals (such as hydroperoxide, carbonyl products and other common free radical types) generated by active groups in the auto-oxidation process of the asphalt phase, prevents the reaction of the free radicals and oxygen molecules, and can effectively slow down the auto-oxidation aging of the asphalt phase.
Drawings
FIG. 1 is a microscopic SEM image of antioxidant 1010;
FIG. 2 is a microscopic SEM image of examples 3 and 5; wherein a represents example 3 and b represents example 5;
FIG. 3 is an infrared spectrum of antioxidant 1010, example 4, and comparative example 1.
Detailed Description
The invention is further illustrated by the following specific examples. The following description is only exemplary of the present invention and should not be construed as limiting the invention in any way, and modifications, equivalents and variations of the above exemplary embodiments according to the technical spirit of the present invention are included in the scope of the present invention as claimed.
Example 1
(1) Material preparation
The epoxy asphalt comprises, by mass, 5 parts of bisphenol A epoxy resin (E-51) as an epoxy asphalt A component (a provider: Nantong Xinchen synthetic materials Co., Ltd.), 50 parts of anhydride curing agent (a provider: Shanxi Luxiang traffic science Co., Ltd.) with long carbon chains as an epoxy asphalt B component, 33.75 parts of matrix asphalt 70# as an epoxy asphalt C component (a provider: Suzhou Dongzhong road bridge Co., Ltd.), and 0.15 part of Iganox1010 as an antioxidant (a provider: Nanjing Milan chemical Co., Ltd.).
(2) Preparation method
Step 1: heating the epoxy asphalt component C to 140 ℃ at first, slowly adding the antioxidant into the epoxy asphalt component C, and uniformly stirring for 3-5 min;
step 2: then adding the epoxy asphalt component B into the epoxy asphalt component C containing the antioxidant, and dispersing and stirring the epoxy asphalt component B and the epoxy asphalt component C by using a high-speed dispersion machine at the speed of 500-1000 r/min until the components are uniformly mixed to obtain cured liquid containing the antioxidant;
and 3, step 3: and finally, adding the component A of the epoxy asphalt, keeping the temperature at 100-120 ℃, and uniformly stirring for 5-10 min to obtain the epoxy asphalt with the thermal-oxidative-aging resistance.
Example 2
The epoxy asphalt with the thermal-oxidative-aging-resistant performance is prepared from 5 parts of bisphenol A epoxy resin as an epoxy asphalt A component, 38 parts of anhydride curing agent with long carbon chains as an epoxy asphalt B component, 33.75 parts of No. 70 matrix asphalt as an epoxy asphalt C component and 10100.57 parts of antioxidant Iganox according to the mass part ratio.
The preparation method is the same as that of example 1.
Example 3
The epoxy asphalt with the thermal-oxidative-aging resistance is prepared from 25 parts by mass of bisphenol A epoxy resin as an epoxy asphalt A component, 50 parts by mass of long-carbon-chain anhydride curing agent as an epoxy asphalt B component, 33.75 parts by mass of No. 70 matrix asphalt as an epoxy asphalt C component and 10100.15 parts by mass of an antioxidant Iganox.
The preparation method is the same as that of example 1.
Example 4
The epoxy asphalt with the thermal-oxidative-aging resistance is prepared from 25 parts by mass of bisphenol A epoxy resin as an epoxy asphalt A component, 38.5 parts by mass of long-carbon-chain anhydride curing agent as an epoxy asphalt B component, 28.8 parts by mass of No. 70 matrix asphalt as an epoxy asphalt C component and 10100.55 parts by mass of antioxidant Iganox.
The preparation method is the same as that of example 1.
Example 5
The epoxy asphalt with the thermal-oxidative-aging resistance is prepared from 10 parts of bisphenol A epoxy resin of an epoxy asphalt A component, 40 parts of anhydride curing agent with long carbon chains of an epoxy asphalt B component, 20 parts of No. 70 matrix asphalt of an epoxy asphalt C component and 10100.57 parts of an antioxidant Iganox by mass parts.
The preparation method is the same as that of example 1.
Example 6
The epoxy asphalt with the thermal-oxidative-aging resistance is prepared from 20 parts by mass of bisphenol A epoxy resin as an epoxy asphalt A component, 40 parts by mass of long-carbon-chain anhydride curing agent as an epoxy asphalt B component, 33.75 parts by mass of No. 50 matrix asphalt as an epoxy asphalt C component and 10100.15 parts by mass of an antioxidant Iganox.
The preparation method is the same as that of example 1.
Microscopic electron microscope scanning and infrared spectrum analysis are carried out on the products of the above examples, and fig. 1 and fig. 2 are microscopic electron microscope scanning SEM images of the antioxidant Iganox1010, the examples 3 and the examples 5. As can be seen from the figure, the micro-scale of the antioxidant Iganox1010 is basically about 6 μm, and the figure 2 obviously shows the distribution morphology of the antioxidant on the surface of the epoxy asphalt material (the circle is the antioxidant Iganox 1010), so that the antioxidant is uniformly distributed in the network structure formed by the epoxy asphalt, and the higher the dosage is, the denser the distribution morphology is. The distributed antioxidants can assist the epoxy asphalt to remove active groups generated by the oxidation of asphalt components, and effectively slow down the oxidation degree of the epoxy asphalt.
FIG. 3 is a graph of the infrared spectra (FTIR) of antioxidant 1010, example 4 and comparative example 1 in the band segments. From FIG. 3, it can be seen that the antioxidant 1010 is at 3645 cm -1 And 1735 cm -1 Obvious absorption peaks are shown, and the corresponding phenolic hydroxyl (Ar-OH) and carbonyl ester (COOR) are respectively shown. In example 4, after adding the antioxidant 1010, the concentration is only 3645 cm -1 A minute peak, 1735 cm -1 The carbonyl ester group of the epoxy asphalt is superposed, and the epoxy asphalt does not generate a new absorption peak on the whole, which indicates that the epoxy asphalt and the antioxidant 1010 are mainly physically fused and do not generate other chemical reactions. This also shows that the antioxidant can have better compatibility with the epoxy asphalt without destroying the structural system of the epoxy asphalt. After 120h thermo-oxidative ageing, the carbonyl ester group of example 4 grows and the ketone group (1706 cm) -1 ) Are significantly lower than those of comparative example 1 without the antioxidant. Generally speaking, in an epoxy asphalt system, the growth of carbonyl ester groups and ketone groups is closely related to the post-curing crosslinking reaction of epoxy asphalt and the oxidative degradation of asphalt phase (DOI: https:// doi.org/10.1016/j.jclepro.2022.130482, 10.1061/(ASCE) MT.1943-5533.0004408), respectively. Therefore, it is obvious that the post-curing reaction of the epoxy resin system and the oxidative degradation degree of the asphalt phase can be obviously slowed down by adding a small amount of the antioxidant. In addition, the phenolic hydroxyl group (Ar-OH) of example 4 was reacted with the stabilizedAnd (3) analyzing the ratio of an alkyl absorption peak (-OH) to obtain that the ratio is reduced from 0.0038 to 0.0032 after aging, which shows that in thermal oxidation aging, an antioxidant 1010 in the epoxy asphalt captures active free radicals of asphalt phase oxidative degradation through phenolic hydroxyl groups to prevent the reaction progress of an aging chain, thereby delaying the aging degree of the epoxy asphalt.
Comparative example 1
In order to embody the anti-thermal oxidation effect under the condition of adding the antioxidant, the invention adopts the same proportion of the epoxy asphalt as that of the embodiment 4 and carries out performance comparison; the epoxy asphalt comprises 25 parts of bisphenol A epoxy resin as an epoxy asphalt A component, 38.5 parts of long-carbon-chain anhydride curing agent as an epoxy asphalt B component, and 28.8 parts of No. 70 matrix asphalt as an epoxy asphalt C component. The product is not added with antioxidant.
Comparative example 2
In order to reflect the influence of the preparation method, the invention adopts a preparation mode different from the preparation modes of the examples 1-6, and the material proportion is selected according to the example 4, wherein the epoxy asphalt A component comprises 25 parts of bisphenol A epoxy resin, the epoxy asphalt B component comprises 38.5 parts of long-carbon-chain acid anhydride type curing agent, the epoxy asphalt C component comprises 28.8 parts of # matrix asphalt and the antioxidant Iganox 10100.55 parts. The preparation method of comparative example 2 is as follows:
step 1: firstly, slowly adding the antioxidant into the component B of the epoxy asphalt, uniformly stirring for 3-5 min,
step 2: then heating the component C of the epoxy asphalt to 140 ℃ of 100-
And step 3: and finally, adding the component A of the epoxy asphalt, keeping the temperature at 100-120 ℃, and uniformly stirring for 5-10 min to obtain the epoxy asphalt with the thermal-oxidative-aging resistance.
Comparison of Material Properties
(1) Evaluation of mechanical Properties of cementitious Material
Examples 1-6, comparative example 2 and epoxy asphalt without antioxidant (comparative example 1) were placed in a hot oven at 85 ℃ for 120 hours (OA for short) to simulate long-term thermal oxidative aging by mixing asphalt with waterAccelerated aging method of mixed materials (JTG E20-T0734). The results of the properties of the thermo-oxidative aging-resistant epoxy asphalt before and after aging are shown in Table 1, wherein the tensile strength and elongation of the epoxy asphalt material can be evaluated by the dynamic thermo-mechanical analysis (DMA) of the glass transition temperature (Tg) ((T g ) The temperature at which the properties of the epoxy asphalt material change dramatically can be evaluated, where the glass transition temperature is taken as the temperature of the highest point in the phase angle curve. The performance results of the cement are shown in table 1.
TABLE 1 mechanical Property results for epoxy asphalt cements
From the tests it can be seen that: the performance of the thermo-oxidative aging resistant epoxy asphalt cementing material is generally superior to that of an epoxy asphalt product not doped with an antioxidant; according to the results of thermo-oxidative aging performance, after long-term thermo-oxidative aging, the tensile strength of the epoxy asphalt product (comparative example 1) without the antioxidant is increased by 31.10 percent, the elongation at break is reduced by 39.23 percent,T g the increase is 21.57%; for the products of examples 1-6, the increase of tensile strength is 9.12-22.18%, the decrease of elongation at break is 12.59-28.92%,T g the increase range is 4.41-14.96%, the change degree of each index is reduced by more than 10% on the whole, and the result shows that the thermal oxidation aging resistant epoxy asphalt material has excellent mechanical property and thermal oxidation resistance, the influence of oxidation on the epoxy asphalt material can be effectively reduced, particularly the post-curing degree and the oxidative degradation degree of the product are greatly reduced, so that the thermal oxidation aging problem of the epoxy asphalt is solved.
The antioxidant is preferentially dispersed in the epoxy resin phase or the asphalt phase, and can obviously influence the curing effect, the grid structure change, the compatibility, the antioxidant effect and the like of each phase. The application finds that the performance of the antioxidant and the epoxy asphalt material is not obviously reduced, which indicates that the antioxidant and the epoxy asphalt material do not generate repulsion action and the antioxidant does not obviously damage an epoxy network structure.
After oxidation, the tensile strength in comparative example 2 increased by 25.28%, the elongation at break decreased by 22.42%,T g the increase is 17.23%. Although the antioxidant performance is improved compared with that of the comparative example 1, the antioxidant is excessively dispersed in an epoxy resin phase system, so that the early chemical curing is hindered, and the strength, deformation resistance and other performances of the cured epoxy asphalt are affected; small amounts of antioxidants are dispersed in the bituminous material, resulting in a strong oxidative hardening of the bituminous material; these factors all result in comparative example 2 being much lower in antioxidant performance than example 4, which also indicates that mixing the antioxidant with the curative component first would destroy the epoxy network structure and greatly reduce the antioxidant effect, while mixing the antioxidant with the matrix asphalt material first is an important enhancement.
Compared with the No. 70 matrix asphalt, the No. 50 matrix asphalt has higher softening point, the formed pavement structure has higher high-temperature stability, the epoxy resin curing system disclosed by the invention can have excellent compatibility with the No. 50 matrix asphalt, the whole anti-oxidation performance of the epoxy asphalt is synergistically improved by utilizing the epoxy resin curing system and the epoxy resin system, and the selection of the asphalt and the application scene of the epoxy asphalt can be widened.
(2) Road performance evaluation of mixed material
The mixture test pieces of the examples 1 to 6, the comparative example 2 and the epoxy asphalt not doped with the antioxidant (the control group 1) were molded, and the mixture gradation was designed according to the corresponding mix proportion of JTG F40-2004 Highway asphalt pavement construction Specification by using a large-pore open-machine mixing structure (OGFC-13). And evaluating the strength and the deformation resistance of the epoxy asphalt mixture by adopting Marshall strength and low-temperature bending strain at-10 ℃. According to JTG E20-2011 test specification of road engineering asphalt and asphalt mixture, a molded mixture test piece is placed in a hot oven at 85 ℃ for 240 hours (OA for short) to simulate long-term thermal-oxidative aging of the mixture. The performance results of the mixes are shown in table 2.
TABLE 2 thermal oxidative aging Performance results for epoxy asphalt cements
From the test results it can be seen that: the performance of the thermo-oxidative aging resistant epoxy asphalt mixture is generally superior to that of an epoxy asphalt product not doped with an antioxidant; according to the thermal oxidation aging performance result, after long-term thermal oxidation aging, the Marshall strength of the examples 1-6 is far lower than that of the epoxy asphalt product without the antioxidant, and the bending strain of the examples 1-6 is also obviously lower than that of the epoxy asphalt product without the antioxidant, so that the result shows that the thermal oxidation resistance of the thermal oxidation aging resistant epoxy asphalt mixture is obviously enhanced, and various performance indexes are superior to those of the epoxy asphalt product without the antioxidant.
In addition, comparative example 2 had lower Marshall strength than comparative example 1 before aging due to the destruction of the epoxy network system by the addition of the antioxidant to the epoxy system. Similar to the mechanical property result of the cementing material, the influence of thermal oxidation aging on the strain indexes of strength and deformation resistance in the comparative example 2 is much higher than that in the example 4, and the result shows that the reasonable preparation method can improve the basic pavement performance and the thermal oxidation resistance of the epoxy asphalt mixture.
The invention discloses thermal-oxidative-aging-resistant epoxy asphalt which comprises A, B, C three components, wherein the component A is epoxy resin, the component B is a curing agent, the component C is matrix asphalt, and the components are 5-25 parts of epoxy resin of the component A, 38-50 parts of curing agent of the component B, 20-33.75 parts of matrix asphalt of the component C and 0.15-0.57 part of antioxidant according to the mass parts. According to the invention, through the addition of the antioxidant, the antioxidant is embedded in the three-dimensional network structure of the epoxy asphalt, so that the free radicals generated by active groups in the self-oxidation aging process of the green phase are eliminated, the self-utilization of the self-good thermal stability is prevented, and the free radicals react with oxygen molecules, so that the self-oxidation aging of the asphalt phase can be effectively slowed down; meanwhile, the post-crosslinking reaction of the epoxy resin phase under the action of high temperature can be prevented, so that the post-curing process of the epoxy resin phase is reduced, the hardening and oxidation of the epoxy asphalt material are effectively slowed down, the thermal-oxidative aging resistance of the material is improved, the epoxy resin component is less influenced by thermal-oxidative aging, the influence of thermal-oxidative aging of the epoxy asphalt can be slowed down, and the technical problem of epoxy asphalt aging is solved.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (7)
1. The composition for preparing the thermal-oxidative-aging-resistant epoxy asphalt is characterized by comprising epoxy asphalt and an antioxidant, wherein the epoxy asphalt comprises an epoxy asphalt A component, an epoxy asphalt B component and an epoxy asphalt C component, and the epoxy asphalt comprises the following components in parts by mass:
5-25 parts of an epoxy asphalt A component,
38-50 parts of epoxy asphalt B component,
20 to 33.75 parts of epoxy asphalt C component,
0.1-1 part of antioxidant;
the component A of the epoxy asphalt is bisphenol A type epoxy resin, the component B of the epoxy asphalt is a long-carbon-chain anhydride type curing agent, and the component C of the epoxy asphalt is No. 50 matrix asphalt or No. 70 matrix asphalt;
the antioxidant is 1010 antioxidant and is used for replacing part of asphalt.
2. The composition for preparing epoxy asphalt with thermal oxygen aging resistance according to claim 1, wherein: the antioxidant is physically fused with other components.
3. The composition for preparing epoxy asphalt with thermal oxygen aging resistance according to claim 1, wherein: the components are respectively as follows according to the mass portion ratio:
25 parts of an epoxy asphalt A component,
38.5 to 50 portions of epoxy asphalt B component,
28.8 to 33.75 portions of epoxy asphalt C component,
0.15-0.55 part of antioxidant.
4. The composition for preparing epoxy asphalt with thermal oxygen aging resistance according to claim 1, wherein: the components are respectively as follows according to the mass portion ratio:
25 parts of an epoxy asphalt A component,
38.5 to 50 portions of epoxy asphalt B component,
28.8 to 33.75 portions of epoxy asphalt C component,
0.138 to 0.5 portion of antioxidant.
5. The composition for preparing epoxy asphalt with thermal oxygen aging resistance according to claim 1, wherein: the components are respectively as follows according to the mass portion ratio:
20 parts of an epoxy asphalt A component,
40 parts of an epoxy asphalt B component,
33.75 parts of an epoxy asphalt C component,
0.15 part of antioxidant.
6. A process for preparing an epoxy asphalt of the thermo-oxidative aging resistant type using the composition according to any one of claims 1 to 5, characterized in that: comprises the following steps of (a) carrying out,
step 1: firstly, heating the epoxy asphalt component C to 140 ℃ of 100-;
step 2: adding the component B of the epoxy asphalt into the product obtained in the step (1), and dispersing and stirring until the components are uniformly mixed to obtain a cured product liquid containing the antioxidant;
and step 3: and (3) adding the component A of the epoxy asphalt into the product obtained in the step (2), keeping the temperature at 100-120 ℃, and uniformly stirring to obtain the epoxy asphalt with the thermal-oxidative-aging resistance.
7. The method for preparing thermal-oxidative-aging-resistant epoxy asphalt according to claim 5, wherein: in the step 2, the dispersion stirring is performed at a stirring speed of 500-1000 r/min.
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| CN116496094A (en) * | 2023-04-07 | 2023-07-28 | 南京联合荣大工程材料有限责任公司 | Preparation method of carbon source containing targeted antioxidant, carbon source and preparation method of refractory material |
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| CN111348864A (en) * | 2018-12-20 | 2020-06-30 | 东南大学 | Epoxy asphalt mixture for snow melting and deicing and preparation method thereof |
| CN112280251A (en) * | 2020-11-24 | 2021-01-29 | 南京阿斯孚特新材料科技有限公司 | High-performance amine curing system epoxy asphalt material and preparation method thereof |
| CN112280325A (en) * | 2020-11-14 | 2021-01-29 | 苏州三正路面工程有限公司 | Anti-cracking asphalt and preparation method thereof |
| US20220009834A1 (en) * | 2020-07-09 | 2022-01-13 | Nutech Ventures | Use of Antioxidants and Recycling Agents for Improving Long-Term Performance of Asphaltic Materials |
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2022
- 2022-07-25 CN CN202210879306.3A patent/CN115109390A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348864A (en) * | 2018-12-20 | 2020-06-30 | 东南大学 | Epoxy asphalt mixture for snow melting and deicing and preparation method thereof |
| US20220009834A1 (en) * | 2020-07-09 | 2022-01-13 | Nutech Ventures | Use of Antioxidants and Recycling Agents for Improving Long-Term Performance of Asphaltic Materials |
| CN112280325A (en) * | 2020-11-14 | 2021-01-29 | 苏州三正路面工程有限公司 | Anti-cracking asphalt and preparation method thereof |
| CN112280251A (en) * | 2020-11-24 | 2021-01-29 | 南京阿斯孚特新材料科技有限公司 | High-performance amine curing system epoxy asphalt material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116496094A (en) * | 2023-04-07 | 2023-07-28 | 南京联合荣大工程材料有限责任公司 | Preparation method of carbon source containing targeted antioxidant, carbon source and preparation method of refractory material |
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