CN102785423A - Anti-cracking low-shrinkage-deformation fiber-cement product and production method thereof - Google Patents
Anti-cracking low-shrinkage-deformation fiber-cement product and production method thereof Download PDFInfo
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- CN102785423A CN102785423A CN2012102892216A CN201210289221A CN102785423A CN 102785423 A CN102785423 A CN 102785423A CN 2012102892216 A CN2012102892216 A CN 2012102892216A CN 201210289221 A CN201210289221 A CN 201210289221A CN 102785423 A CN102785423 A CN 102785423A
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Abstract
The invention relates to an anti-cracking low-shrinkage-deformation fiber-cement product and a production method thereof. Concretely, a novel fiber-reinforced cement product with an excellent anti-cracking function and low shrinkage deformation is realized through an ultra-short fiber, low-elasticity-modulus short fiber and high-elasticity-modulus long-fiber composite reinforced-cement base material by simultaneously adopting high-efficiency additives (a high-efficiency water-reducing agent, a thickening agent, an expanding agent and the like). The product comprises a flexible anti-cracking surface layer and a fiber-reinforced cement structural layer, has a simple and resaonable structure, is convenient and easy in production construction and can be applied to projects, such as building external-wall decorative enclosure, indoor engineering construction as well as roads, bridges and the like with higher requirements on the strength and the durability of the cement base material.
Description
Technical field
What patent of the present invention related to is a kind of cracking resistance low shrinkage and deformation fibre cement product and production method thereof.Fiber grating technology composite highly effective additive technology realizes a kind of fibre cement product that possesses anti-cracking function, low shrinkage and deformation specifically.The product range of application comprises that decorating outer wall of building is gone along with sb. to guard him, the indoor engineering construction, and the road that cement matrix intensity and durability are had higher requirements, constructions such as bridge.
Background technology
Fiber concrete is the NEW TYPE OF COMPOSITE construction material that develops rapidly the present age, is to make base material with cement paste, mortar or concrete, makes the general name of the cement-base composite material that reinforcing material formed with discrete short fiber or continuous long fibre.In the fibre cement product, the main effect of fiber is to delay the expansion in crack in the cement matrix, improves composite material toughness.It all is the key factor that causes the cement products face checking that the increase of the heat of hydration, variations in temperature, elastic modelling quantity, the variation of thermal coefficient of expansion, drying and carbonization are shunk; Through mixing fiber; Cement matrix the crack occurs at self; Through cohering with the interface of fiber, external force is passed to fiber, can remedy weakness such as tensile strength is low, deformability difference.Yet, along with the development of high performance concrete, the raising of strength of cement, the reduction of the ratio of mud, articles from fibrous concrete contraction strain in the length of time early increases thereupon, and when this contraction strain was restricted, the possibility that the crack occurs just increased thereupon.
On the traditional handicraft; Solve articles from fibrous concrete surface problem easy to crack; Usually adopt and mix a small amount of PP fiber and the method compensation enhancing that adds rubber cement, this scheme mainly is through reducing elastic modelling quantity, reducing surface tension and realize anti-cracking function; In practical application, this single means not can solve the micro-crack problem of goods.Therefore fiber grating technology is paid close attention to by domestic and international expert extensively in recent years; This in theory technology can both have been brought into play the high elastic modulus long fibre and delay the large fracture expansion and strengthen toughening effect, has brought into play the low elastic modulus short fiber again and has strengthened base material and the effect that improves fine cracks.But in the practical application because multiple fibre reinforced concrete difficulties in dispersion, construction workability are poor, and actual cracking resistance effect is general, especially for the control effect of crizzle and not obvious.
Summary of the invention
The purpose of this invention is to provide a kind of cracking resistance low shrinkage and deformation fibre cement product and production method thereof; It is rational in infrastructure, production technology is simple, easy construction; Can solve articles from fibrous concrete crack, shrinkage problems preferably, and have water proof anti-seepage, building decoration function.
The object of the invention is achieved through following technical scheme: a kind of cracking resistance low shrinkage and deformation fibre cement product comprises flexible break resistant surface layer and fibre reinforced cement structure sheaf; Adopt superbhort fiber-compound enhancing decoration mortar of low elastic modulus short fiber-high elastic modulus long fibre to process in the flexible break resistant surface layer; Be compounded with the fibre reinforced cement structure sheaf on the flexible break resistant surface layer; The fibre reinforced cement structure sheaf adopts the compound low elastic modulus short fiber of high elastic modulus long fibre refinforced cement sill to process; In the fibre reinforced cement structure sheaf, be equipped with 0-3 layer mesh reinforcements; Flexible break resistant surface layer and fibre reinforced cement structure sheaf are in having the mould of decorative effect, to be composited.
Described mesh reinforcements is that alkali-resistant glass fibre felt, alkali-resistant glass fibre strengthen a kind of in grid cloth, steel wire, the carbon fibre web.
Described superbhort fiber is meant length<the inorganic mineral whisker of 50 μ m is selected alumina base superbhort fiber, zirconia base superbhort fiber, silica-based superbhort fiber, silicon carbide-based superbhort fiber, calcium sulphate-based superbhort fiber, calcium carbonate-base superbhort fiber, Na for use
2O composite S iO
2In base superbhort fiber, magnesium sulfate base superbhort fiber, potash base superbhort fiber, Zinc oxide-base superbhort fiber, antifungin base superbhort fiber and the aluminium base superbhort fiber of boric acid one or more;
Described low elastic modulus short fiber is meant that length is 3mm-15mm, and elastic modelling quantity is lower than concrete fibrous material, selects in PP fiber, PVA fiber, PU fiber, nylon fiber, wood pulp cellulose, the paper fiber one or more for use;
Described high elastic modulus long fibre is meant that length is 25mm-51mm, and elastic modelling quantity is higher than concrete fibrous material, selects in carbon fiber, glass fibre, steel fibre, the basalt fibre one or several for use;
A kind of production method of cracking resistance low shrinkage and deformation fibre cement product is following:
1) cement, aggregate, pigment, fiber, polymer, additive, active material, water are mixed according to the following weight per distribution ratio, process flexible break resistant surface layer mortar after stirring, wherein the raw material weight per distribution ratio is:
Cement 25-45%,
Aggregate 22-55%,
Pigment 0-5%,
Superbhort fiber 0-1%
Low elastic modulus short fiber 0-2%
High elastic modulus long fibre 0-3%
Polymer 0-8%
Additive 0-7%,
Active material 0-5%
Water 10-20%
Described aggregate is selected one or more in sand, microlith, glass chip, ceramic chip, metal fragment, shell chip, the mica flake for use;
Described pigment is selected pigment powder or liquid pigment for use;
Described polymer can adopt that no soap is silicone-modified to gather a kind of in acrylic emulsion, the silicone-modified benzene emulsion of no soap, the silicone-modified Silicone acrylic emulsion of no soap;
Described additive can adopt one or more in water reducer, antifreezing agent, early strength agent, thickener, set retarder, the swelling agent;
Described active material can adopt one or more in metakaolin, flyash, breeze, the stone flour;
2) with the surface layer mortar that configures, adopt and spray or brushing or laying vibratory drilling method, in mould, make decorative layer, spontaneous curing 10-60 minute;
Described mould is made up of frame mould and base plate mould;
3) cement, sand, fiber, polymer, additive, active material and water are mixed according to the following weight per distribution ratio, stir and process fibre reinforced cement structure sheaf mortar, wherein the raw material weight per distribution ratio is:
Cement 25-34%
Sand 46-55%
Low elastic modulus short fiber 0-2%
High modulus fibre 1-5%
Polymer 0-3%
Additive 0-5%
Active material 0-5%
Water 10-15%
Described pigment is selected pigment powder or liquid pigment for use;
Described polymer can adopt that no soap is silicone-modified to gather a kind of in acrylic emulsion, the silicone-modified benzene emulsion of no soap, the silicone-modified Silicone acrylic emulsion of no soap;
Described additive can adopt one or more in water reducer, antifreezing agent, early strength agent, thickener, set retarder, the swelling agent;
Described active material can adopt one or more in metakaolin, flyash, breeze, the stone flour;
4) with the fibre reinforced cement structure sheaf slip that configures, adopt injection or vibrating casting in the mould of making decorative layer, adopt scraper plate that slurry is wipeed off, it is closely knit to use pressure roller to carry out roll-in then;
5) 0-3 layer mesh reinforcements is routed in the mould, carries out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) with the product normal temperature of forming or after steam curing 4-24 hour, carry out the demoulding;
7) evenly spray on the flexible cladding surface or brushing cracking resistance protective agent with spray gun, quantity for spray is controlled at 0.01-0.1L/m
2, air-dry 5 minutes-30 minutes or air dry were 10 minutes-60 minutes after spraying was accomplished;
Described cracking resistance protective agent adopts a kind of in sodium base fluid attitude curing agent, potassium base fluid attitude curing agent, lithium base fluid attitude curing agent, the siliceous LCM of nano inorganic;
8) place the fog room maintenance after 1-3 days product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Described swelling agent is selected a kind of in aluminium sulfate, calcium oxide, magnesia class, the crystal expansion agent, preferred crystal swelling agent for use; Described crystal expansion agent is formed with calcareous raw material 20 ~ 80%, magnesia raw material 10 ~ 60%, sa 5 ~ 40% complex configuration.
Described water reducer is selected a kind of in naphthalenesulfonate formaldehyde condensation compound, sulfonated melamine compound condensation product, the polycarboxylate water-reducer for use; Described early strength agent is selected a kind of in sulfate, nitrite, the triethanolamine for use; Described antifreezing agent is selected a kind of in calcium chloride, potash, the natrium nitrosum for use; Described thickener is selected a kind of in hydroxypropyl methylcellulose, hydroxyethylcellulose, the polyacrylamide for use; Described set retarder is selected a kind of in wooden calcium, molasses, the citric acid for use.
The beneficial effect of patent of the present invention is:
1, in the product surface layer; The adding inorganic mineral whisker of novelty forms superbhort fiber-low compound refinforced cement base material of short fiber-high-elastic long fibre that plays, and carries out the grating design from elastic modelling quantity and length dimension; Reduce the generation of crizzle, improve the endurance quality and the service life of goods.
2, pass through the interpolation of high efficiency water reducing agent and thickener in the formula for a product; Improve the utilization ratio of moisture content; Prevent material separation and bleeding with thickening and water retention, thereby increase the cohesiveness and the cohesive force of cement cementitious material, reduce the separation rate of material component; Improve the fiber dispersion characteristic, thus make fiber grating technology can better application in plant produced.
3, add the compensate for shrinkage that swelling agent is realized base material in the formula for a product, can improve cement stone aperture structure, improve mechanical property; Especially adopt crystal expansion agent; This additive can be at hydrated cementitious early stage and later stage play a role; Reduce concrete product and do contraction, owing to be to reduce surface tension through crystal growth, so only need add the result of use that few amount just can reach common swelling agent; Stability is good, and is less to cement matrix self influence.
4, add in the formula for a product through the silicone-modified polymer emulsion of no soap; Not only possess the raising durability of traditional polymer, realize beneficial functions such as dry curing, possess the damping effect simultaneously fiber concrete; Discharge moisture under the effect that the pore solution concentration increases in cement hydration process; Pore is reduced owing to internal relative humidity under the psychrometric difference driving action that produces, and in time benefit is wet to give pore, thereby reduces the crackle of doing the generation of shrinking.
5, surface spraying cracking resistance protective agent; Through the pore on water leaking-in cement-based material surface, and produce chemical reaction, form a network structure at three dimensions with its peripheral calcium carbonate; Make the various compositions in the cement be solidified into a firm entity; Effectively improved intensity, density and wearability, the superficial density of refinforced cement sill and hardness play the effect of cracking resistance from the inside to surface.
6, goods have excellent performance such as anti-preferably contraction, cracking resistance, bending resistance, shock resistance, antifatigue, thereby in road, airport, bridge, underground engineering field wide application prospect are arranged.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Fig. 1 is a kind of cracking resistance low shrinkage and deformation fibre cement product generalized section.
Among the figure: 1. flexible break resistant surface layer mortar 2. fibre reinforced cement structure sheafs 3. mesh reinforcements
The specific embodiment
Case study on implementation 1:
1) cement 25kg (25%), sand 24 kg (24%), glass chip 10kg (10%), pigment powder 5kg (5%), alumina base superbhort fiber 0.5kg (0.5%), aluminium borate superbhort fiber 0.5kg (0.5%), PP fiber 2kg (2%), carbon fiber 3kg (3%), silicone-modified acrylic emulsion 8kg (8%), water reducer naphthalenesulfonate formaldehyde condensation compound 1kg (1%), early strength agent sulfate 1kg (1%), antifreezing agent calcium chloride 0.5kg (0.5%), thickener hydroxypropyl methylcellulose 0.5kg (0.5%), swelling agent aluminium sulfate 4kg (4%), metakaolin 5kg (5%) and the water 10kg (10%) of gathering of no soap are mixed according to the weight percent proportioning, process flexible break resistant surface layer mortar after stirring.
2), adopt gunite in mould, to make decorative layer, spontaneous curing 10 minutes with the surface layer mortar that configures;
3) cement 28kg (28%), sand 52kg (52%), PP fiber 1kg (1%), carbon fiber 1kg (1%), silicone-modified acrylic emulsion 3kg (3%), metakaolin 5kg (5%) and the water 10kg (10%) of gathering of no soap mix according to the weight percent proportioning, stir and process fibre reinforced cement structure sheaf mortar;
4) with the fibre reinforced cement structure sheaf slip that configures, be ejected in the mould of making decorative layer, adopt scraper plate that slurry is wipeed off, it is closely knit to use pressure roller to carry out roll-in then;
5) 1 layer of alkali-resistant glass fibre felt is routed in the mould, carries out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) the product normal temperature maintenance of forming after 24 hours, is carried out the demoulding;
7) evenly spray sodium base fluid attitude curing agent on the flexible cladding surface with spray gun, quantity for spray is controlled at 0.1L/m
2, after spraying is accomplished air-dry 30 minutes;
8) place the fog room maintenance after 1 day product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Case study on implementation 2:
1) with cement 45kg (45%), the sub-30.5kg of microlith (30.5%), ceramic chip 10kg (10%), liquid paint 3kg (3%), zirconia base superbhort fiber 0.3kg (0.3%), antifungin base superbhort fiber 0.2kg (0.2%), PVA fiber 1kg (1%), glass fibre 2kg (2%), the silicone-modified benzene emulsion 5kg of no soap (5%), water reducer sulfonated melamine compound condensation product 0.5kg (0.5%), early strength agent nitrite 0.5kg (0.5%), antifreezing agent potash 0.5kg (0.5%), crystal expansion agent 1.5kg (1.5%; Calcium wherein: magnesium: sial=2:5:3), flyash 3kg (3%), water 20kg (20%) mix according to the weight percent proportioning, process flexible break resistant surface layer mortar after stirring;
2), adopt spread coating in mould, to make decorative layer, spontaneous curing 20 minutes with the surface layer mortar that configures;
3) with cement 34kg (34%), sand 46kg (46%), glass fibre 2kg (2%), water reducer naphthalenesulfonate formaldehyde condensation compound 0.3kg (0.3%), early strength agent sulfate 0.2kg (0.2%), antifreezing agent calcium chloride 0.2kg (0.2%), crystal expansion agent 0.3kg (0.3%; Calcium wherein: magnesium: sial=2:5:3), flyash 2kg (2%), water 15kg (15%) mix according to the weight percent proportioning, stir and process fibre reinforced cement structure sheaf mortar;
5) with the fibre reinforced cement structure sheaf slip that configures, vibrating casting adopts scraper plate that slurry is wipeed off in the mould of making decorative layer, and it is closely knit to use pressure roller to carry out roll-in then;
5) 2 layers of alkali-resistant glass fibre are strengthened grid cloth and be routed in the mould, carry out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) the product normal temperature of forming after 12 hours, is carried out the demoulding;
7) evenly brush potassium base fluid attitude curing agent on the flexible cladding surface with spray gun, the brushing amount is controlled at 0.05L/m
2, the last brush accomplishing air-dry 15 minutes;
8) place the fog room maintenance after 2 days product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Case study on implementation 3:
1) cement 28kg (28%), sand 30kg (30%), metal fragment 25kg (25%), water reducer polycarboxylic acids 1kg (1%), early strength agent triethanolamine 1kg (1%), antifreezing agent natrium nitrosum 0.5kg (0.5%), thickener hydroxyethylcellulose 0.5kg (0.5%), swelling agent magnesia class 1kg (1%) and water 13kg are mixed according to the following weight per distribution ratio, process flexible break resistant surface layer mortar after stirring;
2) with the surface layer mortar that configures, adopt and lay vibratory drilling method, in mould, make decorative layer, spontaneous curing 30 minutes;
3) cement 30kg (30%), sand 46kg (46%), PVA fiber 2kg (2%), steel fibre 3kg (3%), glass fibre 2kg (2%), the silicone-modified benzene emulsion 1.5kg of no soap (1.5%), water reducer sulfonated melamine compound condensation product 0.5kg (0.5%), early strength agent nitrite 0.5kg (0.5%), antifreezing agent potash 0.5kg (0.5%), swelling agent aluminium sulfate 2kg (2%) and water 12kg (12%) are mixed according to the weight percent proportioning, stir and process fibre reinforced cement structure sheaf mortar;
4) with the fibre reinforced cement structure sheaf slip that configures, be ejected in the mould of making decorative layer, adopt scraper plate that slurry is wipeed off, it is closely knit to use pressure roller to carry out roll-in then;
5) 3 layers of steel wire are routed in the mould, carry out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) the product normal temperature of forming after 4 hours, is carried out the demoulding;
7) evenly spray lithium base fluid attitude curing agent on the flexible cladding surface with spray gun, quantity for spray is controlled at 0.01L/m
2, after spraying is accomplished air-dry 5 minutes;
8) place the fog room maintenance after 3 days product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Case study on implementation 4:
1) cement 37kg (37%), the sub-23kg of microlith (23%), shell chip 10kg (10%), pigment powder 4kg (4%), silica-based superbhort fiber 0.3kg (0.3%), silicon carbide-based superbhort fiber 0.2kg (0.2%), PU fiber 0.5kg (0.5%), steel fibre 1kg (1%), the silicone-modified Silicone acrylic emulsion 4kg of no soap (4%), breeze 4kg (4%), water 16kg (16%) are mixed according to the weight percent proportioning, process flexible break resistant surface layer mortar after stirring;
2), adopt to be injected in and make decorative layer in the mould, spontaneous curing 40 minutes with the surface layer mortar that configures;
3) cement 29kg (29%), sand 48kg (48%), PU fiber 1kg (1%), basalt fibre 1kg (1%), the silicone-modified Silicone acrylic emulsion 1kg of no soap (1%), water reducer polycarboxylic acids 0.5kg (0.5%), early strength agent triethanolamine 0.3kg (0.3%), antifreezing agent natrium nitrosum 0.2kg (0.2%), swelling agent calcium oxide 4kg (4%), breeze 3kg (3%) and water 11kg (11%) are mixed according to the weight percent proportioning, stir and process fibre reinforced cement structure sheaf mortar.
4) with the fibre reinforced cement structure sheaf slip that configures, vibrating casting adopts scraper plate that slurry is wipeed off in the mould of making decorative layer, and it is closely knit to use pressure roller to carry out roll-in then;
5) the product steam curing of forming after 4 hours, is carried out the demoulding;
7) evenly brush the siliceous LCM of nano inorganic with spray gun on the flexible cladding surface, the brushing amount is controlled at 0.01L/m
2, air dry was 10 minutes after brushing was accomplished;
8) place the fog room maintenance after 1 day product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Case study on implementation 5:
1) the silicone-modified acrylic emulsion 7kg (7%), thickener hydroxypropyl methylcellulose 0.5kg (0.5%), set retarder molasses 0.5kg (0.5%), swelling agent calcium oxide 4kg (4%), water reducer naphthalenesulfonate formaldehyde condensation compound 1kg (1%), stone flour 4kg (4%), water 15kg (15%) of gathering of cement 40kg (40%), sand 18kg (18%), shell chip 4kg (4%), liquid paint 2kg (2%), calcium sulfate superbhort fiber 0.5kg (0.5%), calcium carbonate superbhort fiber 0.5kg (0.5%), nylon fiber 1.5kg (1.5%), basalt fibre 1kg (1%), carbon fiber 0.5kg (0.5%), no soap mixed according to the weight percent proportioning, process flexible break resistant surface layer mortar after stirring;
2), adopt spread coating in mould, to make decorative layer, spontaneous curing 50 minutes with the surface layer mortar that configures;
3) cement 25kg (25%), sand 55kg (55%), nylon fiber 0.5kg (0.5%), steel fibre 1.5kg (1.5%), silicone-modified acrylic emulsion 2kg (2%), water reducer sulfonated melamine compound condensation product 0.5kg (0.5%), stone flour 4.5kg (4.5%) and the water 11kg (11%) of gathering of no soap are mixed according to the weight percent proportioning, stir and process fibre reinforced cement structure sheaf mortar;
4) with the fibre reinforced cement structure sheaf slip that configures, be ejected in the mould of making decorative layer, adopt scraper plate that slurry is wipeed off, it is closely knit to use pressure roller to carry out roll-in then;
5) 1 layer of carbon fibre web is routed in the mould, carries out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) the product steam curing of forming after 12 hours, is carried out the demoulding;
7) evenly brush sodium base fluid attitude curing agent on the flexible cladding surface with spray gun, the brushing amount is controlled at 0.05L/m
2, air dry was 30 minutes after brushing was accomplished;
8) place the fog room maintenance after 1 day product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Case study on implementation 6:
1) with cement 32kg (32%), the sub-30kg of microlith (30%), ceramic chip 13kg (13%), pigment powder 1kg (1%), magnesium sulfate base superbhort fiber 0.3kg (0.3%), potash base superbhort fiber 0.3kg (0.3%), PP fiber 0.2kg (0.2%), wood pulp cellulose 0.2kg (0.2%), glass fibre 2kg (2%), basalt fibre 0.5kg (0.5%), the silicone-modified benzene emulsion 2kg of no soap (2%), set retarder citric acid 1kg (1%), crystal expansion agent 1kg (1%; Calcium wherein: magnesium: sial=5:1:4), higher mountain range 2kg (2%), breeze 2.5kg (2.5%), water 12kg (12%) mix according to the weight percent proportioning, process flexible break resistant surface layer mortar after stirring;
2) with the surface layer mortar that configures, adopt spread coating, in mould, make decorative layer, spontaneous curing 60 minutes;
3) with cement 32kg (32%), sand 50kg (50%), PP fiber 1kg (1%), wood-fibred 0.5kg (0.5%), glass fibre 1.5kg (1.5%), carbon fiber 1kg (1%), the silicone-modified benzene emulsion 0.5kg of no soap (0.5%), thickener hydroxyethylcellulose 0.5kg (0.5%), set retarder molasses 0.5kg (0.5%), crystal expansion agent 0.5kg (0.5%; Calcium wherein: magnesium: sial=16:3:1) mix according to the following weight per distribution ratio with water 12kg (12%) stirs and processes fibre reinforced cement structure sheaf mortar;
4) with the fibre reinforced cement structure sheaf slip that configures, vibrating casting adopts scraper plate that slurry is wipeed off in the mould of making decorative layer, and it is closely knit to use pressure roller to carry out roll-in then;
5) 2 layers of alkali-resistant glass fibre felt are routed in the mould, carry out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) the product steam curing of forming after 24 hours, is carried out the demoulding;
7) evenly spray potassium base fluid attitude curing agent on the flexible cladding surface with spray gun, quantity for spray is controlled at 0.1L/m
2, air dry was 60 minutes after spraying was accomplished;
8) place the fog room maintenance after 2 days product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Case study on implementation 7:
1) with cement 33kg (33%), sand 22kg (22%), ceramic chip 10kg (10%), liquid paint 3kg (3%), Na
2O composite S iO
2Base superbhort fiber 0.5kg (0.5%), PVA fiber 1kg (1%), paper pulp fiber 0.5kg (0.5%), steel fibre 1.5kg, basalt fibre 1kg (1%), the silicone-modified Silicone acrylic emulsion 6kg of no soap (6%), water reducer sulfonated melamine compound condensation product 1kg (1%), early strength agent sulfate 0.5kg (0.5%), crystal expansion agent agent 1.5kg (1.5%; Calcium wherein: magnesium: sial=16:3:1), flyash 2.5kg (2.5%), stone flour 2kg (2%) and water 14kg (14%) mix according to the weight percent proportioning, process flexible break resistant surface layer mortar after stirring;
2) with the surface layer mortar that configures, adopt and spray or brushing or laying vibratory drilling method, in mould, make decorative layer, spontaneous curing 15 minutes;
3) with cement 27kg (27%), sand 49kg (49%), PVA fiber 1kg (1%), paper pulp fiber 1kg (1%), carbon fiber 1kg (1%), basalt fibre 1kg (1%), the silicone-modified Silicone acrylic emulsion 1kg of no soap (1%), thickener polyacrylamide 1kg (1%), set retarder citric acid 1kg (1%), crystal expansion agent additive 1kg (1%; Calcium wherein: magnesium: sial=32:60:8), metakaolin 2kg (2%), breeze 1kg (1%) and water 13kg (13%) mix according to the weight percent proportioning, stir and process fibre reinforced cement structure sheaf mortar;
4) with the fibre reinforced cement structure sheaf slip that configures, be ejected in the mould of making decorative layer, adopt scraper plate that slurry is wipeed off, it is closely knit to use pressure roller to carry out roll-in then;
5) 3 layers of alkali-resistant glass fibre grid cloth are routed in the mould, carry out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) the product normal temperature maintenance of forming after 14 hours, is carried out the demoulding;
7) evenly brush lithium base fluid attitude curing agent on the flexible cladding surface with spray gun, the brushing amount is controlled at 0.06L/m
2, the last brush accomplishing air-dry 20 minutes;
8) place the fog room maintenance after 3 days product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
Case study on implementation 8:
1) with cement 38kg (38%), the sub-20kg of microlith (20%), mica flake 15kg (15%), pigment powder 1kg (1%), zinc oxide superbhort fiber 1kg (1%), PU fiber 1kg (1%), carbon fiber 1kg (1%), glass fibre 1kg (1%), silicone-modified acrylic emulsion 2kg (2%), the crystal expansion agent 2kg (2% of gathering of no soap; Calcium wherein: magnesium: sial=32:60:8), metakaolin 1kg (1%) and water 17kg (17%) mix according to the weight percent proportioning, process flexible break resistant surface layer mortar after stirring;
2) with the surface layer mortar that configures, adopt and spray or brushing or laying vibratory drilling method, in mould, make decorative layer, spontaneous curing 25 minutes;
3) with cement 33kg (33%), sand 47kg (47%), PU fiber 0.5kg (0.5%), nylon fiber 0.5kg (0.5%), glass fibre 0.5kg (0.5%), basalt fibre 0.5kg (0.5%), the silicone-modified benzene emulsion 1kg of no soap (1%), thickener hydroxypropyl methylcellulose 0.5kg (0.5%), set retarder wood calcium 0.5kg (0.5%), water reducer polycarboxylic acids 1kg (1%), crystal expansion agent 2kg (2%; Calcium wherein: magnesium: sial=5:1:4), flyash 1kg (1%), stone flour 1kg (1%) and water 11kg (11%) mix according to the weight percent proportioning, stir and process fibre reinforced cement structure sheaf mortar;
4) with the fibre reinforced cement structure sheaf slip that configures, vibrating casting adopts scraper plate that slurry is wipeed off in the mould of making decorative layer, and it is closely knit to use pressure roller to carry out roll-in then;
5) 2 layers of carbon fibre web are routed in the mould, carry out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) the product steam curing of forming after 14 hours, is carried out the demoulding;
7) evenly spray the siliceous LCM of nano inorganic with spray gun on the flexible cladding surface, quantity for spray is controlled at 0.05L/m
2, air dry was 30 minutes after spraying was accomplished;
8) place the fog room maintenance after 2 days product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
The product of the present invention's a kind of cracking resistance low shrinkage and deformation fibre cement product and production method thereof reaches following technical indicator: bulk density≤2.3g/cm through test
3Bending resistance ratio intensity (LOP)>=13MPa; Beaming resistance limit intensity (MOR)>=25MPa; Compression strength>=155MPa; Shock resistance (steam-cured 3d)>=25KJ/m2; Shrinkage factor (28d)≤0.2 ‰; Water absorption rate≤1.2%; Freeze thawing circulation 25 times, no peeling, strength retention ratio>=95%; 80 ℃ of water-bath accelerated ageing 7d strength retention ratio>=90%.
Claims (10)
1. a cracking resistance low shrinkage and deformation fibre cement product is characterized in that comprising flexible break resistant surface layer (1) and fibre reinforced cement structure sheaf (2); Adopt superbhort fiber-compound enhancing decoration mortar of low elastic modulus short fiber-high elastic modulus long fibre to process in the flexible break resistant surface layer (1); On flexible break resistant surface layer (1), be compounded with fibre reinforced cement structure sheaf (2); Fibre reinforced cement structure sheaf (2) adopts the compound low elastic modulus short fiber of high elastic modulus long fibre refinforced cement sill to process; In fibre reinforced cement structure sheaf (2), be equipped with 0-3 layer mesh reinforcements (3); Flexible break resistant surface layer (1) and fibre reinforced cement structure sheaf (2) are in having the mould of decorative effect, to be composited.
2. a kind of cracking resistance low shrinkage and deformation fibre cement product according to claim 1 is characterized in that described mesh reinforcements (3) strengthens a kind of in grid cloth, steel wire, the carbon fibre web for alkali-resistant glass fibre felt, alkali-resistant glass fibre.
3. a kind of cracking resistance low shrinkage and deformation fibre cement product according to claim 1 is characterized in that described superbhort fiber is meant length<the inorganic mineral whisker of 50 μ m is selected alumina base superbhort fiber, zirconia base superbhort fiber, silica-based superbhort fiber, silicon carbide-based superbhort fiber, calcium sulphate-based superbhort fiber, calcium carbonate-base superbhort fiber, Na for use
2O composite S iO
2In base superbhort fiber, magnesium sulfate base superbhort fiber, potash base superbhort fiber, Zinc oxide-base superbhort fiber, antifungin base superbhort fiber and the aluminium base superbhort fiber of boric acid one or more.
4. cracking resistance low shrinkage and deformation fibre cement product according to claim 1; It is characterized in that described low elastic modulus short fiber is meant that length is 3mm-15mm; Elastic modelling quantity is lower than concrete fibrous material, selects in PP fiber, PVA fiber, PU fiber, nylon fiber, wood pulp cellulose, the paper fiber one or more for use.
5. cracking resistance low shrinkage and deformation fibre cement product according to claim 1; It is characterized in that described high elastic modulus long fibre is meant that length is 25mm-51mm; Elastic modelling quantity is higher than concrete fibrous material, selects in carbon fiber, glass fibre, steel fibre, the basalt fibre one or several for use.
6. the production method of a cracking resistance low shrinkage and deformation fibre cement product is characterized in that:
1) cement, aggregate, pigment, fiber, polymer, additive, active material, water are mixed according to the following weight per distribution ratio, process flexible break resistant surface layer mortar after stirring, wherein the raw material weight per distribution ratio is:
Cement 25-45%,
Aggregate 22-55%,
Pigment 0-5%,
Superbhort fiber 0-1%
Low elastic modulus short fiber 0-2%
High elastic modulus long fibre 0-3%
Polymer 0-8%
Additive 0-7%,
Active material 0-5%
Water 10-20%
Described aggregate is selected one or more in sand, microlith, glass chip, ceramic chip, metal fragment, shell chip, the mica flake for use;
Described pigment is selected pigment powder or liquid pigment for use;
Described polymer can adopt that no soap is silicone-modified to gather a kind of in acrylic emulsion, the silicone-modified benzene emulsion of no soap, the silicone-modified Silicone acrylic emulsion of no soap;
Described additive can adopt one or more in water reducer, antifreezing agent, early strength agent, thickener, set retarder, the swelling agent;
Described active material can adopt one or more in metakaolin, flyash, breeze, the stone flour;
With the surface layer mortar that configures, adopt and spray or brushing or laying vibratory drilling method, in mould, make decorative layer, spontaneous curing 10-60 minute,
Described mould is made up of frame mould and base plate mould;
Cement, sand, fiber, polymer, additive, active material and water are mixed according to the following weight per distribution ratio, stir and process fibre reinforced cement structure sheaf mortar, wherein the raw material weight per distribution ratio is:
Cement 25-34%
Sand 46-55%
Low elastic modulus short fiber 0-2%
High modulus fibre 1-5%
Polymer 0-3%
Additive 0-5%
Active material 0-5%
Water 10-15%
Described pigment is selected pigment powder or liquid pigment for use;
Described polymer adopts that no soap is silicone-modified to gather a kind of in acrylic emulsion, the silicone-modified benzene emulsion of no soap, the silicone-modified Silicone acrylic emulsion of no soap;
Described additive adopts one or more in water reducer, antifreezing agent, early strength agent, thickener, set retarder, the swelling agent;
Described active material adopts one or more in metakaolin, flyash, breeze, the stone flour;
4) with the fibre reinforced cement structure sheaf slip that configures, adopt injection or vibrating casting in the mould of making decorative layer, adopt scraper plate that slurry is wipeed off, it is closely knit to use pressure roller to carry out roll-in then;
5) 0-3 layer mesh reinforcements is routed in the mould, carries out roll-in, make it to be absorbed in the fibre reinforced cement structure sheaf with pressure roller;
6) with the product normal temperature of forming or after steam curing 4-24 hour, carry out the demoulding;
7) evenly spray on the flexible cladding surface or brushing cracking resistance protective agent with spray gun, quantity for spray is controlled at 0.01-0.1L/m
2, air-dry 5 minutes-30 minutes or air dry were 10 minutes-60 minutes after spraying was accomplished,
Described cracking resistance protective agent adopts a kind of in sodium base fluid attitude curing agent, potassium base fluid attitude curing agent, lithium base fluid attitude curing agent, the siliceous LCM of nano inorganic;
8) place the fog room maintenance after 1-3 days product, be prepared into cracking resistance low shrinkage and deformation fibre cement product.
7. a kind of cracking resistance low shrinkage and deformation fibre cement product production method according to claim 6 is characterized in that described swelling agent selects a kind of in aluminium sulfate, calcium oxide, magnesia class, the crystal expansion agent, preferred crystal swelling agent for use; Described crystal expansion agent is formed with calcareous raw material 20 ~ 80%, magnesia raw material 10 ~ 60%, sa 5 ~ 40% complex configuration.
8. a kind of cracking resistance low shrinkage and deformation fibre cement product production method according to claim 6 is characterized in that described cracking resistance protective agent adopts a kind of in sodium base fluid attitude curing agent, potassium base fluid attitude curing agent, lithium base fluid attitude curing agent, the siliceous LCM of nano inorganic.
9. a kind of cracking resistance low shrinkage and deformation fibre cement product production method according to claim 6 is characterized in that described polymer can adopt that no soap is silicone-modified to gather a kind of in acrylic emulsion, the silicone-modified benzene emulsion of no soap, the silicone-modified Silicone acrylic emulsion of no soap.
10. a kind of cracking resistance low shrinkage and deformation fibre cement product production method according to claim 6 is characterized in that described water reducer selects a kind of in naphthalenesulfonate formaldehyde condensation compound, sulfonated melamine compound condensation product, the polycarboxylate water-reducer for use; Described early strength agent is selected a kind of in sulfate, nitrite, the triethanolamine for use; Described antifreezing agent is selected a kind of in calcium chloride, potash, the natrium nitrosum for use; Described thickener is selected a kind of in hydroxypropyl methylcellulose, hydroxyethylcellulose, the polyacrylamide for use; Described set retarder is selected a kind of in wooden calcium, molasses, the citric acid for use.
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