CN103253918B - Self-repairing anti-shrink cement based composite material - Google Patents
Self-repairing anti-shrink cement based composite material Download PDFInfo
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Abstract
The invention discloses a self-repairing anti-shrink cement based composite material which comprises the following components in parts by weight: 400-800 parts of cement, 200-600 parts of waste, 400-1000 parts of sand, 264-528 parts of water, 10-70 parts of fiber, 4-10 parts of additive and polymer emulsion which accounts for 5%-10% of the gross weight of the cement. The self-repairing anti-shrink cement based composite material has good anti-shrink performance, impermeability and durability. When having a crack, the material can realize a self-repairing function under field conditions, and can be used as restorative materials for retaining walls, road mat coats, concrete pipelines, oil and gas pipelines, dams and the like.
Description
Technical field
The present invention relates to a kind of repair materials, particularly a kind of selfreparing resisted shrinkage cement-base composite material.
Background technology
Concrete is good, cheap due to its performance, is widely used in Architectural Equipment.But long-term use and weathering can cause concrete cracking, fracture width is larger, objectionable impurities (chlorion, sulfate ion etc.) can invade fast, more easily suffers erosion in coastland, has had a strong impact on security and the long durability of concrete structure.Experiment proves that ordinary mortar is poor as patching material effect, poor with concrete binding power, after repairing for some time, there will be the phenomenons such as cracking.Fiber reinforced cement-based composite material, as patching material, although enhance material property, improves cohesiveness, but reducing of aggregate size can cause matrix drying shrinkage comparatively large, and the change of early-age shrinkage is greatly also the major cause causing early crack.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of selfreparing resisted shrinkage cement-base composite material, this material resisted shrinkage, the interpolation of polymer emulsion substantially increases material binding and resisted shrinkage performance, after load, fracture width is in micro-scaled range, under field conditions (factors) can teaching display stand repairing effect, can be used as the repair materials such as retaining wall, road cover, concrete duct, oil and gas pipes, dam.
Technical scheme of the present invention is achieved in that
Selfreparing resisted shrinkage cement-base composite material, is made up of cement, waste, sand, water, polymer emulsion, fiber and admixture, and polymer emulsion is 5% ~ 10% of cement gross weight.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, each raw material weight proportioning is as follows: cement: 400 ~ 800 weight parts; Waste: 200 ~ 600 weight parts; Sand: 400 ~ 1000 weight parts; Water: 264 ~ 528 weight parts; Fiber: 10 ~ 70 weight parts; Admixture: 4 ~ 10 weight parts.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, described waste is flyash or Iron-ore Slag.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, described fiber is one or more in polyvinyl alcohol fiber, aramid fiber, trevira, modified polyvinyl alcohol fabric and polypropylene fibre.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, described staple length is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, oleophylic process is carried out to described polyvinyl alcohol fiber surface and obtains modified polyvinyl alcohol fabric: described polyvinyl alcohol fiber is immersed in 1% ~ 5% silane coupler solution, take out also room temperature after 24 ~ 48 hours to dry, soak after within 12 ~ 24 hours, carrying out oil surface process in lubricating oil, taking-up is dried, and places for subsequent use.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, described polymer emulsion is one or more in vinyl acetate-ethylene copolymerization emulsions, aqueous epoxy emulsion, styrene-butadiene emulsion, ACRYLIC EMULSION and benzene emulsion.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, described sand is middle fine sand, and granularity is 125 ~ 3000 μm; Preferred size is 125 ~ 200 μm.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, described cement is one or both mixing in ordinary Portland cement and aluminosulfate cement, strength of cement grade >=42.5; Described admixture is one or more in defoamer, water reducer and solidifying agent.
Above-mentioned selfreparing resisted shrinkage cement-base composite material, described flyash is modified coal ash, flyash modified method is as follows: preparation quality mark is 1% ~ 5% cetyl trimethylammonium bromide solution and massfraction is respectively 1% ~ 5% silane coupler solution, first according to solid-liquid mass ratio (1 ~ 5): 10, flyash is joined in cetyl trimethylammonium bromide solution, stir more than 24 hours, water washing and filtering, more than drying in oven 24h, then be (1 ~ 5) according to solid-liquid mass ratio: 10 join in silane coupler solution, stir more than 1h, put into 70 DEG C ~ 100 DEG C baking oven 24 ~ 48h again, obtain modified coal ash.
The invention has the beneficial effects as follows:.
1, product resistance to cleavage of the present invention is strong, and after load, fracture width is little, has long durability, and the interpolation of fiber makes it have good toughness and pull resistance, is a kind of desirable building repair materials.
2, in the present invention, common polyvinyl alcohol fiber can be selected, combine fibre debonding and extract and break of CFRP failure mode, oleophylic process is carried out to common polythene alcohol fiber surface, make fiber in drawing process, make maximum merit, reach the effect of best activeness and quietness.
3, add polymer emulsion and improve the snappiness of material, the interpolation of polymer emulsion not only increases the performance of matrix itself, and improves the interaction between fiber and cement based, and the performance of material is far above the fundamental property of normal concrete.
4, under the effect of carrying capacity, when suitably controlling sand grains footpath, the effect of multiple crack growth can be reached; The flexural strength of cement-based material improves more than 3 times.Even if still can present superior pseudo stain-hardening behavior after cement-base composite material primary fracture, improve security and the weather resistance of cement based significantly, this material has the effect of multiple crack growth, and counter-bending effective.
5, the selfreparing being added to material of fiber provides nucleation site, and polymer emulsion adds cement and interfibrous bonding force, and unhydrated cement material can condense at fiber peripheral, after natural circulation, realizes selfreparing.
Embodiment
Embodiment 1
Composition and each raw material weight proportioning of the present embodiment selfreparing resisted shrinkage cement-base composite material are as follows: 52.5 ordinary Portland cement 650 weight parts, flyash 450 weight part, sand 650 weight part, water 390 weight part, aqueous epoxy emulsion 60 weight part, solidifying agent 6 weight part, defoamer 2 weight part, water reducer 1 weight part, polyvinyl alcohol fiber 30 weight part [such as: 52.5 ordinary Portland cements 650 kilograms, 450 kilograms, flyash, 650 kilograms, sand, 390 kilograms, water, aqueous epoxy emulsion 60 kilograms, 6 kilograms, solidifying agent, defoamer 2 kilograms, water reducer 1 kilogram, polyvinyl alcohol fiber 30 kilograms, namely the weight part in the present invention refers to that each material takes according to identical mass unit].Described polyvinyl alcohol fiber length is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa; Described sand is fine sand, and granularity is 125 ~ 200 μm.
Material performance test method and foundation: test rate of self-contraction according to GB/T50082-2009; Under bending load condition, the situation in crack is produced: according to the fracture resistance testing method in GB17671-1999, load is carried out to test specimen by bending load testing inspection test specimen, and with environment field scanning electron microscope observation fracture width under unloaded state; Tension test: load material according to GB/T15231-2008 tensile strength method, when strain reaches set(ting)value, remove load, with environment field scanning electron microscope observation fracture width; Adopt the self-healing properties in drying and watering cycle method test material crack: each drying and watering cycle is all crannied for band test specimen to be positioned in water 24 hours, then taking-up to be positioned in air 24 hours.
Detected result: 180 days rate of self-contraction 400 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 45 μm, maximum crack width 60 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 30 μm, and maximum crack is 75 μm; The crack width average in the 90 day length of time is 26 μm, and maximum crack is 50 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 40 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 2 years.
Embodiment 2
Composition and each raw material weight proportioning of the present embodiment selfreparing resisted shrinkage cement-base composite material are as follows: 52.5 aluminosulfate cement 600 weight parts, flyash and Iron-ore Slag be totally 400 weight parts (mass ratio of flyash and Iron-ore Slag is 2: 3), sand 600 weight part, water 264 weight part; styrene-butadiene emulsion 20 weight part, solidifying agent 4 weight part, defoamer 1 weight part; water reducer 1 weight part, aramid fiber 40 weight part.Described aramid fiber length is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa; Described sand is fine sand, and granularity is 125 ~ 200 μm.
Material performance test method and according to identical with embodiment 1.
Detected result: 180 days rate of self-contraction 380 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 50 μm, maximum crack width 75 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 28 μm, and maximum crack is 70 μm; The crack width average in the 90 day length of time is 24 μm, and maximum crack is 60 μm.Width is less than or equal to the crack of 35 μm, can realize the complete selfreparing in crack through 40 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 2 years.
Embodiment 3
Composition and each raw material weight proportioning of the present embodiment selfreparing resisted shrinkage cement-base composite material are as follows: 52.5R ordinary Portland cement 800 weight part, flyash 400 weight part, sand 500 weight part, water 552 weight part, ACRYLIC EMULSION 80 weight part, solidifying agent 6 weight part, trevira 62 weight part.Described trevira length is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa; Described sand is fine sand, and granularity is 125 ~ 200 μm.
Material performance test method and according to identical with embodiment 1.
Detected result: 180 days rate of self-contraction 390 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 50 μm, maximum crack width 75 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 30 μm, and maximum crack is 75 μm; The crack width average in the 90 day length of time is 26 μm, and maximum crack is 60 μm.Width is less than or equal to the crack of 30 μm, can realize the complete selfreparing in crack through 40 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 2 years.
Embodiment 4
Composition and each raw material weight proportioning of the present embodiment selfreparing resisted shrinkage cement-base composite material are as follows: 52.5 ordinary Portland cements and 52.5 aluminosulfate cements are totally 700 weight parts (mass ratio of 52.5 ordinary Portland cements and 52.5 aluminosulfate cements is 1: 1), Iron-ore Slag 400 weight part, sand 600 weight part, water 400 weight part, ACRYLIC EMULSION 65 weight part, solidifying agent 5 weight part, defoamer 2 weight part, water reducer 1 weight part, polypropylene fibre 15 weight part.Described polypropylene fibre length is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa; Described sand is fine sand, and granularity is 125 ~ 200 μm.
Material performance test method and according to identical with embodiment 1.
Detected result: 180 days rate of self-contraction 400 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 55 μm, maximum crack width 70 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 32 μm, and maximum crack is 77 μm; The crack width average in the 90 day length of time is 26 μm, and maximum crack is 65 μm.Width is less than or equal to the crack of 30 μm, can realize the complete selfreparing in crack through 40 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 2 years.
Embodiment 5
Composition and each raw material weight proportioning of the present embodiment selfreparing resisted shrinkage cement-base composite material are as follows: 52.5R ordinary Portland cement and 52.5R aluminosulfate cement be totally 500 weight parts (mass ratio of 52.5R ordinary Portland cement and 52.5R aluminosulfate cement is 1: 2), flyash 350 weight part, sand 750 weight part, water 400 weight part, vinyl acetate-ethylene copolymerization emulsions 40 weight part, solidifying agent 4 weight part, defoamer 1 weight part, water reducer 1 weight part, polyvinyl alcohol fiber and polypropylene fibre be totally 50 weight parts (polyvinyl alcohol fiber and polypropylene fibre mass ratio are 1: 3).The length of described polypropylene fibre and polyvinyl alcohol fiber is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa; Described sand is fine sand, and granularity is 125 ~ 200 μm.
Material performance test method and according to identical with embodiment 1.
Detected result: 180 days rate of self-contraction 370 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 40 μm, maximum crack width 65 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 25 μm, and maximum crack is 55 μm; The crack width average in the 90 day length of time is 25 μm, and maximum crack is 48 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 35 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 2 years.
Embodiment 6
Composition and each raw material weight proportioning of the present embodiment selfreparing resisted shrinkage cement-base composite material are as follows: 52.5 ordinary Portland cements and 52.5R aluminosulfate cement be totally 600 weight parts (mass ratio of 52.5 ordinary Portland cements and 52.5R aluminosulfate cement is 1: 2), flyash 570 weight part, sand 500 weight part, water 500 weight part, vinyl acetate-ethylene copolymerization emulsions, aqueous epoxy emulsion, styrene-butadiene emulsion, ACRYLIC EMULSION and benzene emulsion 60 weight part (vinyl acetate-ethylene copolymerization emulsions, aqueous epoxy emulsion, styrene-butadiene emulsion, ACRYLIC EMULSION and benzene emulsion mass ratio are 5: 1: 3: 2: 6), solidifying agent 6 weight part, defoamer 2 weight part, water reducer 1 weight part, polyvinyl alcohol fiber, aramid fiber, trevira, modified polyvinyl alcohol fabric and polypropylene fibre be totally 70 weight part (polyvinyl alcohol fibers, aramid fiber, trevira, modified polyvinyl alcohol fabric and polypropylene fibre mass ratio are 1: 6: 3: 5: 2).The length of described polyvinyl alcohol fiber, aramid fiber, trevira, modified polyvinyl alcohol fabric and polypropylene fibre is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa; Described sand is fine sand, and granularity is 125 ~ 200 μm.Oleophylic process is carried out to polyvinyl alcohol fiber surface and obtains modified polyvinyl alcohol fabric: described polyvinyl alcohol fiber being immersed in massfraction is 1.6% silane coupler solution, take out also room temperature after 25 hours to dry, soak after within 18 hours, carrying out oil surface process in lubricating oil (10W/50), taking-up is dried, and places for subsequent use.
Material performance test method and according to identical with embodiment 1.
Detected result: 180 days rate of self-contraction 370 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 40 μm, maximum crack width 75 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 27 μm, and maximum crack is 65 μm; The crack width average in the 90 day length of time is 25 μm, and maximum crack is 45 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 40 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 2 years.
Embodiment 7
The difference of the present embodiment and embodiment 1 is: described polyvinyl alcohol fiber is modified polyvinyl alcohol fabric, oleophylic process is carried out to described polyvinyl alcohol fiber surface and obtains modified polyvinyl alcohol fabric: described polyvinyl alcohol fiber being immersed in massfraction is 1% silane coupler solution, take out also room temperature after 24 hours to dry, soak after within 12 hours, carrying out oil surface process in lubricating oil (10W/50), taking-up is dried, and places for subsequent use.
Detected result: 180 days rate of self-contraction 390 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 40 μm, maximum crack width 55 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 30 μm, and maximum crack is 70 μm; The crack width average in the 90 day length of time is 18 μm, and maximum crack is 45 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 35 drying and watering cycles.In addition, test specimen places two-and-a-half years in atmosphere without the crack generation being greater than 5 μm.
Embodiment 8
The difference of the present embodiment and embodiment 5 is: described polyvinyl alcohol fiber is modified polyvinyl alcohol fabric, oleophylic process is carried out to described polyvinyl alcohol fiber surface and obtains modified polyvinyl alcohol fabric: described polyvinyl alcohol fiber being immersed in massfraction is 5% silane coupler solution, take out also room temperature after 48 hours to dry, soak after within 24 hours, carrying out oil surface process in lubricating oil (10W/50), taking-up is dried, and places for subsequent use.
Detected result: 180 days rate of self-contraction 360 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 36 μm, maximum crack width 60 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 23 μm, and maximum crack is 50 μm; The crack width average in the 90 day length of time is 17 μm, and maximum crack is 43 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 33 drying and watering cycles.In addition, test specimen places two-and-a-half years in atmosphere without the crack generation being greater than 5 μm.
Embodiment 9
The difference of the present embodiment and embodiment 6 is: described polyvinyl alcohol fiber is modified polyvinyl alcohol fabric, oleophylic process is carried out to described polyvinyl alcohol fiber surface and obtains modified polyvinyl alcohol fabric: described polyvinyl alcohol fiber being immersed in massfraction is 3% silane coupler solution, take out also room temperature after 36 hours to dry, soak after within 18 hours, carrying out oil surface process in lubricating oil (10W/50), taking-up is dried, and places for subsequent use.
Detected result: 180 days rate of self-contraction 365 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 42 μm, maximum crack width 70 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 23 μm, and maximum crack is 60 μm; The crack width average in the 90 day length of time is 18 μm, and maximum crack is 40 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 34 drying and watering cycles.In addition, test specimen places two-and-a-half years in atmosphere without the crack generation being greater than 5 μm.
Embodiment 10
The difference of the present embodiment and embodiment 7 is: described flyash is modified coal ash, flyash modified method is as follows: preparation quality mark is 1% cetyl trimethylammonium bromide solution and massfraction is respectively 1% silane coupler solution, first according to solid-liquid mass ratio 1: 10, flyash is joined in cetyl trimethylammonium bromide solution, stir 30 hours, water washing and filtering, drying in oven 30h, then be join in silane coupler solution at 1: 10 according to solid-liquid mass ratio, stir 2h, put into 70 DEG C of baking oven 48h again, obtain modified coal ash.
Detected result: 180 days rate of self-contraction 370 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 34 μm, maximum crack width 50 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 26 μm, and maximum crack is 65 μm; The crack width average in the 90 day length of time is 16 μm, and maximum crack is 40 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 32 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 3 years.
Embodiment 11
The difference of the present embodiment and embodiment 8 is: described flyash is modified coal ash, flyash modified method is as follows: preparation quality mark is 5% cetyl trimethylammonium bromide solution and massfraction is respectively 5% silane coupler solution, first according to solid-liquid mass ratio 5: 10, flyash is joined in cetyl trimethylammonium bromide solution, stir 25 hours, water washing and filtering, drying in oven 26h, then be join in silane coupler solution at 5: 10 according to solid-liquid mass ratio, stir 1.5h, put into 100 DEG C of baking oven 24h again, obtain modified coal ash.
Detected result: 180 days rate of self-contraction 350 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 30 μm, maximum crack width 54 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 20 μm, and maximum crack is 45 μm; The crack width average in the 90 day length of time is 15 μm, and maximum crack is 40 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 30 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 3 years.
Embodiment 12
The difference of the present embodiment and embodiment 9 is: described flyash is modified coal ash, flyash modified method is as follows: preparation quality mark is 3% cetyl trimethylammonium bromide solution and massfraction is respectively 3% silane coupler solution, first according to solid-liquid mass ratio 3: 10, flyash is joined in cetyl trimethylammonium bromide solution, stir 27 hours, water washing and filtering, drying in oven 30h, then be join in silane coupler solution at 2.5: 10 according to solid-liquid mass ratio, stir 2h, put into 80 DEG C of baking oven 24 ~ 48h again, obtain modified coal ash.
Detected result: 180 days rate of self-contraction 350 × 10
-6.Carrying capacity in bending load test is 5000N, crack width average 40 μm, maximum crack width 65 μm.In tension test, prestrain is the crack width average in 2%, the 3 day length of time is 20 μm, and maximum crack is 56 μm; The crack width average in the 90 day length of time is 16 μm, and maximum crack is 38 μm.Width is less than or equal to the crack of 40 μm, can realize the complete selfreparing in crack through 32 drying and watering cycles.In addition, test specimen is placed in atmosphere and is produced without the crack being greater than 5 μm for 3 years.
Above-described embodiment is only for the invention example is clearly described, and the restriction not to the invention embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among the protection domain of the invention claim.
Claims (7)
1. selfreparing resisted shrinkage cement-base composite material, is characterized in that, is made up of cement, waste, sand, water, polymer emulsion, fiber and admixture, and polymer emulsion is 5% ~ 10% of cement gross weight; Each raw material weight proportioning is as follows: cement: 400 ~ 800 weight parts; Waste: 200 ~ 600 weight parts; Sand: 400 ~ 1000 weight parts; Water: 264 ~ 528 weight parts; Fiber: 10 ~ 70 weight parts; Admixture: 4 ~ 10 weight parts; Described fiber is modified polyvinyl alcohol fabric, oleophylic process is carried out to polyvinyl alcohol fiber surface and obtains modified polyvinyl alcohol fabric: described polyvinyl alcohol fiber being immersed in massfraction is 1% ~ 5% silane coupler solution, take out also room temperature after 24 ~ 48 hours to dry, soak after within 12 ~ 24 hours, carrying out oil surface process in lubricating oil, taking-up is dried, and places for subsequent use.
2. selfreparing resisted shrinkage cement-base composite material according to claim 1, is characterized in that, described waste is flyash or Iron-ore Slag.
3. selfreparing resisted shrinkage cement-base composite material according to claim 1, is characterized in that, described staple length is 3mm ~ 20mm, and diameter is 10 μm ~ 40 μm, and Young's modulus is 2000MPa ~ 40GPa.
4. according to the arbitrary described selfreparing resisted shrinkage cement-base composite material of claims 1 to 3, it is characterized in that, described polymer emulsion is one or more in vinyl acetate-ethylene copolymerization emulsions, aqueous epoxy emulsion, styrene-butadiene emulsion, ACRYLIC EMULSION and benzene emulsion.
5., according to the arbitrary described selfreparing resisted shrinkage cement-base composite material of claims 1 to 3, it is characterized in that, described sand is middle fine sand, and granularity is 125 ~ 3000 μm.
6. according to the arbitrary described selfreparing resisted shrinkage cement-base composite material of claims 1 to 3, it is characterized in that, described cement is one or both mixing in ordinary Portland cement and aluminosulfate cement, strength of cement grade >=42.5; Described admixture is one or more in defoamer, water reducer and solidifying agent.
7. selfreparing resisted shrinkage cement-base composite material according to claim 2, it is characterized in that, described flyash is modified coal ash, flyash modified method is as follows: preparation quality mark is 1% ~ 5% cetyl trimethylammonium bromide solution and massfraction is respectively 1% ~ 5% silane coupler solution, first according to solid-liquid mass ratio (1 ~ 5): 10, flyash is joined in cetyl trimethylammonium bromide solution, stir more than 24 hours, water washing and filtering, more than drying in oven 24h, then be (1 ~ 5) according to solid-liquid mass ratio: 10 join in silane coupler solution, stir more than 1h, put into 70 DEG C ~ 100 DEG C baking oven 24 ~ 48h again, obtain modified coal ash.
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| CN1321929C (en) * | 2005-08-22 | 2007-06-20 | 严素玲 | Geopolymer dry powder regenerated polystyrene heat preservation and heat insulating mortar |
| CN101844883A (en) * | 2010-01-28 | 2010-09-29 | 汪超 | Novel composite ecological cement and product application thereof |
| CN101891429B (en) * | 2010-06-28 | 2013-05-15 | 上海衡峰氟碳材料有限公司 | Ceramic imitation cement component, ceramic imitation cement product and preparation method thereof |
| CN102785423A (en) * | 2012-08-15 | 2012-11-21 | 南京倍立达实业有限公司 | Anti-cracking low-shrinkage-deformation fiber-cement product and production method thereof |
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2013
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