CN101851960B - Insulation system with polycrystalline anti-cracking and waterproofing mortar - Google Patents

Insulation system with polycrystalline anti-cracking and waterproofing mortar Download PDF

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Publication number
CN101851960B
CN101851960B CN 201010167795 CN201010167795A CN101851960B CN 101851960 B CN101851960 B CN 101851960B CN 201010167795 CN201010167795 CN 201010167795 CN 201010167795 A CN201010167795 A CN 201010167795A CN 101851960 B CN101851960 B CN 101851960B
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mortar
waterproofing
insulation
inorganic
cement
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CN101851960A (en
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陈岳朝
何耀光
陈锡桥
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Haida Construction Group Co., Ltd.
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陈岳朝
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/27Water resistance, e.g. waterproof or water-repellant materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/28Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34Non-shrinking or non-cracking materials
    • C04B2111/343Crack resistant materials

Abstract

The invention discloses an insulation system with polycrystalline anti-cracking and waterproofing mortar, which belongs to the technical field of the building material. The insulation system comprises interface mortar, insulation mortar and waterproofing mortar, wherein the waterproofing mortar comprises the following components: cement, sand, redispersable latex powder, hydroxypropyl-methyl cellulose ether, inorganic water reducing agent, organosilicon waterproofing agent, sodium silicate and inorganic retarder. Compared with the prior art, the invention has the following advantages of: 1, solving the problem that the bonding strength of the inorganic cementitious material for penetration is not sufficient, and significantly improving the bonding strength and the compressive strength of the whole insulation system; 2, improving the construction property of the material and the insulation effect of the system; 3, improving the construction property and enhancing the long-term strength of the product; 4, improving the waterproofing function of the system, and changing the rigidity of various kinds of polycrystalline mortar into softness, thereby improving the impact resistance, bending resistance, tensile strength, shrinkage resistance and other strain capacities of the insulation system; and 5. improving the bending resistance and the tensile strength of the material and the physical anti-cracking performance of the system.

Description

A kind of heat-insulation system with polycrystalline anti-cracking and waterproofing mortar
Technical field
The invention belongs to building material technical field, a kind of specifically heat-insulation system with polycrystalline anti-cracking and waterproofing mortar, it is mainly used in the inside and outside energy-saving heat preserving of architectural exterior-protecting construction body of wall or roof system.
Background technology
General sheet material or the member heat preserving and insulating material of adopting of home and abroad construction wall insulation at present, price is high, construction difficulty is big, impact resistance is poor, but high insulating effect, the area seasons oneself to cold; Also there is another kind of heat insulating material at present, i.e. glue powder polyphenyl granule exterior wall external insulation system, this heat insulation system is made up of boundary layer, thermal insulation layer, cracking resistance overcoat, plays thermal insulation, protection.All there is cement in each layer of glue powder polyphenyl granule exterior wall external insulation system of the prior art, but because cement is hydraulic material, forms cement stone with hydrate; Generally needed 28 days just can reach design strength, dehydration too early, aquation stops; Intensity promptly no longer rises, and containing cement material is the plastic material of blunging, and volume shrinks along with the evaporation of moisture; In contraction process, contain cement material if also do not have intensity or intensity very low, shrinkage stress is greater than the tension stress of material; Amount of contraction will show as the large fracture of relatively concentrating, and exists owing to variations in temperature causes expanding, contraction produces problem of cracks; Secondly the glue powder polyphenyl granule exterior wall external insulation system of prior art impervious, waterproof ability is relatively poor; And if impervious, water resistance is poor; Drenched or in moist air environment, make moist easily by sleet, such as in the high areas of air humidity such as China East China, thereby in the space of thermal insulation layer, form steam; Heat energy will weaken the heat preservation and energy conservation effects of thermal insulation layer through the steam conduction; In addition, existing glue powder polyphenyl granule exterior wall external insulation system has rigid characters, thereby causes the brittle fractures such as impact, expansion or contraction because of thermal stresses or the generation of other external force easily; Once more, it is low that existing glue powder polyphenyl granule exterior wall external insulation system has adhesion strength, shock resistance, the shortcoming that compressive strength is low, and at the Xia Redong cryogenic region because altitude temperature difference effect, phenomenon such as be easy to generate local hollowing at boundary layer, come off.
Summary of the invention
The present invention is directed to deficiency of the prior art; A kind of flexibility is provided; The waterproof and antiseepage performance is good, adhesion strength is high, not easy to crack, the heat-insulation system with polycrystalline anti-cracking and waterproofing mortar of easy construction is applicable to the construction wall insulation of Xia Redong cryogenic region.
In order to solve the problems of the technologies described above, the present invention is able to solve through following technical proposals:
A kind of heat-insulation system with polycrystalline anti-cracking and waterproofing mortar; Comprise boundary mortar, thermal insulation mortar and waterproofing mortar, it is characterized in that: waterproofing mortar comprises cement, sand, redispersable latex powder, hydroxypropyl methyl cellulose ether, inorganic water reducing agent, waterproofing agent of organosilicon, water glass and inorganic retarder.Redispersable latex powder among the present invention is a kind of flexible high molecular material; As the organic gel gel material; It can be dissolved in the cold water in mortar stirs, and particularly fully obtains dissolving at the aqueous solution that contains alkalescence, forms membrane structure rapidly and is wrapped in around cement and other inorganic coagulation materials; Make between organic gel gel material and the inorganic coagulation material and merge each other, and after solidifying, fully bond; Secondly; Inorganic coagulation materials such as cement all become with graininess in hydrolysis or hydration reaction; Be difficult to be penetrated into the object of denser, and become in the space between particle and the particle, make cementitious material solidify the back and be restricted with having bonding effect specific area between the bonded material; But as the redispersable latex powder of organic gel gel material and the hydrolysate of waterproofing agent of organosilicon; The film that forms after the hydrolysis contacts with bonded material comprehensively, remedies the deficiency of inorganic coagulation material, and the adhesion strength of material improves greatly; Once more; The film that forms after redispersable latex powder and the waterproofing agent of organosilicon hydrolysis is wrapped in around the inorganic coagulation material; It is forming the plasticity ligament between the inorganic gel particle after material cured; Can increase the pliability of mortar, improve strain capacity such as shock resistance of the present invention, anti-folding, stretch-proof, contraction, hinder the brittle fractures such as impact, expansion or contraction that thermal stresses or other external force produce; Further; The film that forms after redispersable latex powder and the waterproofing agent of organosilicon hydrolysis; It around the internal package of the product of moulding inorganic coagulation material, externally covers the surface of shaped article when material cured; Have very strong impervious, waterproof ability, can prevent freeze-thaw damage and the system reduction heat preservation and energy conservation effects of making moist.The water glass that adds among the present invention is to form tiny chemical molecular hydrate after the inorganic coagulation material hydrolysis; It enriches between silicate granules with the crystalline solid form in the hydrated reaction of cement process; The specific area of inorganic coagulation material is increased greatly, thereby realized that adhesion strength significantly improves under the relative situation of the dry density of material.The hydroxypropyl methyl cellulose ether that adds among the present invention is the multichain high molecular polymer of a kind of high-hydroscopicity, high-moisture-retention; It rises rapidly in 2-3 minute in mortar stirs and sticks with paste the film that forms high slumpability; Laminated segregation, the bleeding that can effectively stop mortar improve the workability of various slurries; Also can make mortar fully keep moisture content, let the abundant aquation of cement also effectively obtain maintenance, the intensity after the moulding of raising mortar; After hydroxypropyl methyl cellulose ether plays paste, make introducing microbubbles a large amount of in the mortar.Like this, shrink the free water that destroys, can get in these microbubbles, thereby reduce early stage freeze-thaw damage because of the freeze thawing circulation causes mortar expansion; In addition, the expansion, the shrinkage stress that produce because of variations in temperature obtain efficient buffer to the microbubble diffusion, thereby reduce the generation in crack.
Preferably; By weight percentage; Each components contents of waterproofing mortar is: cement 25%-36%; Sand 55%-65%, redispersable latex powder 0.5%-2%, hydroxypropyl methyl cellulose ether 0.1%-0.2%, inorganic water reducing agent 0.1%-0.3%, waterproofing agent of organosilicon 0.15%-0.4%, water glass 0.3%-0.7%, inorganic retarder 0.01%-0.04%.
In order to obtain better technique effect, further technical measures also comprise:
Above-mentioned waterproofing mortar also comprises slag powders, coarse whiting, fine particle calcium carbonate and flyash, and by weight percentage, proportion is respectively in waterproofing mortar: slag powders 2%-5%, coarse whiting 3%-5%, fine particle calcium carbonate 0.5%-2.0%, flyash 2%-3%.At first; The use of slag powders, coarse whiting, fine particle calcium carbonate and flyash greatly reduces manufacturing cost of the present invention; And slag powders, flyash, coarse whiting can play the hydration reaction that promotes cement, water glass, fine particle calcium carbonate, and improve the material workability as the inorganic active active material.
Further improve: above-mentioned waterproofing mortar also comprises polypropylene fibre, and by weight percentage, proportion is 0.04%-0.06% in waterproofing mortar.Polypropylene fibre can form uniform unrest to support system in mortar inside; Improve physical properties such as tensile strength of the present invention and impact strength, thereby can effectively stop the crack that produces because of the reasons such as plastic shrinkage, drying shrinkage or segregation of mortar, bleeding that produce in the inherent process of setting of mortar and the development in crack; Also can effectively hinder simultaneously the outside crack that produces of expanding, shrink like variations in temperature, the crack that crack that building settlement produces and impact, vibration produce.
Preferably; By weight percentage, above-mentioned thermal insulation mortar comprises following component: cement 60%-80%, redispersable latex powder 0.2%-0.3%, cold water type polyvinyl alcohol 0.5%-1.0%, hydroxypropyl methyl cellulose ether 0.1%-0.2%, air entraining agent 0.01%-0.03%, water glass 0.06%-0.1%, inorganic retarder 0.002%-0.01% and granular polystyrene 7%-12%.Cold water type polyvinyl alcohol in the thermal insulation mortar is similar with the effect of dispersed latex powder again, mainly is to be wrapped in around the inorganic coagulation material with the physical property that improves insulation layer and whole system and waterproof, impermeable ability through forming film after the hydrolysis; Air entraining agent is the organic active active material, can improve system's heat insulation effect, and plays the effect that improves the material workability.
Further improve: above-mentioned thermal insulation mortar also comprises slag powders, coarse whiting, fine particle calcium carbonate and flyash, and by weight percentage, proportion is respectively in thermal insulation mortar: slag powders 3%-10%, coarse whiting 3%-5%, fine particle calcium carbonate 1%-4%, flyash 3%-12%.
Further improve: above-mentioned thermal insulation mortar also comprises wood fibre and polypropylene fibre, and by weight percentage, proportion is respectively in thermal insulation mortar: wood fibre 1%-3%, polypropylene fibre 0.5%-2%.Polypropylene fibre, wood fibre improve the physics cracking resistance of the anti-folding of material, stretch-proof ability raising system; Wood fibre also plays water retention in addition, improves the intensity in thermal insulation mortar later stage.
Preferably; By weight percentage, boundary mortar comprises following component: cement 25%-38%, sand 55%-70%, redispersable latex powder 0.5%-2%, hydroxypropyl methyl cellulose ether 0.1%-0.2%, inorganic water reducing agent 0.1%-0.3%, water glass 0.3%-0.6% and inorganic retarder 0.01%-0.05%.Boundary mortar has improved the adhesion strength between itself and the basic unit's body of wall greatly through redispersable latex powder, has avoided that boundary layer is easy to generate local hollowing, the problem of phenomenon such as come off.
Further improve: above-mentioned boundary mortar also comprises slag powders, and by weight percentage, proportion is respectively 3%-5% in thermal insulation mortar.
The present invention compared with prior art has following beneficial effect:
1, be inorganic coagulation material with cement, water glass, fine particle calcium carbonate; As the organic gel gel material, improve inorganic coagulation material infiltration bond stress defect of insufficient with redispersable latex powder and cold water type polyvinyl alcohol; Bonding, the compressive strength of whole heat-insulation system are significantly improved.
2, be the inorganic active active material with slag powders, flyash, coarse whiting, promote the hydration reaction of cement, water glass, fine particle calcium carbonate, and improve the material workability; Also making full use of industrial residue, is the organic active active material with the air entraining agent, improves system's heat insulation effect, and improves the material workability.
3,, improve workability, strengthen the product later strength with high-hydroscopicities such as hydroxypropyl methyl cellulose ether, wood fibre, high-moisture-retention material.
4, be the organic waterproof material with redispersable latex powder and cold water type polyvinyl alcohol, waterproofing agent of organosilicon; With water glass is that inorganic waterproof material is improved the water-proof function of system; And make various polycrystal mortar property rigidity become flexibility, improve strain capacity such as the shock resistance of heat-insulation system, anti-folding, stretch-proof, contraction.
5, adding polypropylene fibre, wood fibre improve the physics cracking resistance of the anti-folding of material, stretch-proof ability raising system.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is described in further detail:
Embodiment 1
A kind of heat-insulation system with polycrystalline anti-cracking and waterproofing mortar comprises boundary mortar, thermal insulation mortar and waterproofing mortar, wherein,
Waterproofing mortar comprises cement, sand, redispersable latex powder, hydroxypropyl methyl cellulose ether, inorganic water reducing agent, waterproofing agent of organosilicon, water glass, inorganic retarder, polypropylene fibre, slag powders, coarse whiting, fine particle calcium carbonate and flyash.By weight percentage; Each components contents of waterproofing mortar is: cement 25%; Sand 65%, redispersable latex powder 0.5%, hydroxypropyl methyl cellulose ether 0.1%, inorganic water reducing agent 0.1%, waterproofing agent of organosilicon 0.25%, water glass 0.5%, inorganic retarder 0.01%, polypropylene fibre 0.04%, slag powders 3%, coarse whiting 3%, fine particle calcium carbonate 0.5%, flyash 2%;
By weight percentage, above-mentioned thermal insulation mortar comprises following component: cement 60%, redispersable latex powder 0.3%, cold water type polyvinyl alcohol 0.7%, hydroxypropyl methyl cellulose ether 0.2%, air entraining agent 0.03%, water glass 0.06%, inorganic retarder 0.01%, granular polystyrene 10%, slag powders 10%, coarse whiting 5%, fine particle calcium carbonate 4%, flyash 4.7%, wood fibre 3% and polypropylene fibre 2%;
By weight percentage, boundary mortar comprises following component: cement 25%, sand 70%, redispersable latex powder 1.49%, hydroxypropyl methyl cellulose ether 0.1%, inorganic water reducing agent 0.1%, water glass 0.3%, inorganic retarder 0.01% and slag powders 3%.
Embodiment 2
A kind of heat-insulation system with polycrystalline anti-cracking and waterproofing mortar comprises boundary mortar, thermal insulation mortar and waterproofing mortar, wherein,
Waterproofing mortar comprises cement, sand, redispersable latex powder, hydroxypropyl methyl cellulose ether, inorganic water reducing agent, waterproofing agent of organosilicon, water glass, inorganic retarder, polypropylene fibre, slag powders, coarse whiting, fine particle calcium carbonate and flyash.By weight percentage; Each components contents of waterproofing mortar is: cement 36%; Sand 55%, redispersable latex powder 0.5%, hydroxypropyl methyl cellulose ether 0.1%, inorganic water reducing agent 0.1%, waterproofing agent of organosilicon 0.25%, water glass 0.5%, inorganic retarder 0.01%, polypropylene fibre 0.04%, slag powders 2%, coarse whiting 3%, fine particle calcium carbonate 0.5%, flyash 2%.
By weight percentage, above-mentioned thermal insulation mortar comprises following component: cement 80%, redispersable latex powder 0.3%, cold water type polyvinyl alcohol 1.0%, hydroxypropyl methyl cellulose ether 0.1%, air entraining agent 0.03%, water glass 0.06%, inorganic retarder 0.01%, granular polystyrene 7%, slag powders 3%, coarse whiting 3%, fine particle calcium carbonate 1%, flyash 3%, wood fibre 1% and polypropylene fibre 0.5%.
By weight percentage, boundary mortar comprises following component: cement 38%, sand 55%, redispersable latex powder 2%, hydroxypropyl methyl cellulose ether 0.2%, inorganic water reducing agent 0.3%, water glass 0.6%, inorganic retarder 0.05% and slag powders 3.85%.
Embodiment 3
A kind of heat-insulation system with polycrystalline anti-cracking and waterproofing mortar comprises boundary mortar, thermal insulation mortar and waterproofing mortar, wherein,
Waterproofing mortar comprises cement, sand, redispersable latex powder, hydroxypropyl methyl cellulose ether, inorganic water reducing agent, waterproofing agent of organosilicon, water glass, inorganic retarder, polypropylene fibre, slag powders, coarse whiting, fine particle calcium carbonate and flyash.By weight percentage; Each components contents of waterproofing mortar is: cement 25%; Sand 56.3%, redispersable latex powder 2%, hydroxypropyl methyl cellulose ether 0.2%, inorganic water reducing agent 0.3%, waterproofing agent of organosilicon 0.4%, water glass 0.7%, inorganic retarder 0.04%, polypropylene fibre 0.06%, slag powders 5%, coarse whiting 5%, fine particle calcium carbonate 2.0%, flyash 3%.
By weight percentage, above-mentioned thermal insulation mortar comprises following component: cement 60%, redispersable latex powder 0.2%, cold water type polyvinyl alcohol 0.5%, hydroxypropyl methyl cellulose ether 0.15%, air entraining agent 0.01%, water glass 0.1%, inorganic retarder 0.002%, granular polystyrene 12%, slag powders 3%, coarse whiting 5%, fine particle calcium carbonate 4%, flyash 10.038%, wood fibre 3% and polypropylene fibre 2%.
By weight percentage, boundary mortar comprises following component: cement 32%, sand 61.62%, redispersable latex powder 0.5%, hydroxypropyl methyl cellulose ether 0.15%, inorganic water reducing agent 0.2%, water glass 0.5%, inorganic retarder 0.03% and slag powders 5%.
Comprehensive the foregoing description, the technical indicator contrast of the glue powder polyphenyl granule exterior wall external insulation system of the present invention and prior art is as follows:
1, boundary material is pressed and is cut adhesion strength relatively
Do not add water glass, hydroxypropyl methyl cellulose ether
Project 7d 15d 28d
Former intensity ≥0.2MPa ≥0.4MPa ≥0.7MPa
Water-fast intensity ≥0.1MPa ≥0.3MPa ≥0.5MPa
Freeze-thawing resistant intensity ≥0.1MPa ≥0.2MPa ≥0.5MPa
Add water glass, hydroxypropyl methyl cellulose ether
Project 7d 15d 28d
Former intensity ≥0.1MPa ≥0.4MPa ≥1.0MPa
Water-fast intensity ≥0.08MPa ≥0.4MPa ≥0.7MPa
Freeze-thawing resistant intensity ≥0.08MPa ≥0.3MPa ≥0.5MPa
2, armour layer each item performance indications relatively
Do not add water glass, waterproofing agent of organosilicon, redispersable latex powder
Add water glass, waterproofing agent of organosilicon, redispersable latex powder
3, some performance indications of thermal insulation mortar relatively
Do not add water glass, hydroxypropyl methyl cellulose ether
Project 15d 28d 48d
Compressive strength ≥100Kpa ≥150Kpa ≥200Kpa
Pressure is cut adhesion strength ≥20Kpa ≥40Kpa ≥50Kpa
Add water glass, hydroxypropyl methyl cellulose ether
Project 15d 28d 48d
Compressive strength ≥80Kpa ≥200Kpa ≥250Kpa
Pressure is cut adhesion strength ≥15Kpa ≥40Kpa ≥70Kpa
4, some performance indications of whole system relatively
Do not add water glass, waterproofing agent of organosilicon, redispersable latex powder
Add water glass, waterproofing agent of organosilicon, redispersable latex powder

Claims (3)

1. heat-insulation system with polycrystalline anti-cracking and waterproofing mortar; Comprise boundary mortar, thermal insulation mortar and waterproofing mortar, it is characterized in that: said waterproofing mortar comprises cement, sand, redispersable latex powder, hydroxypropyl methyl cellulose ether, inorganic water reducing agent, waterproofing agent of organosilicon, water glass, inorganic retarder, slag powders, coarse whiting, fine particle calcium carbonate, flyash and polypropylene fibre; Wherein, By weight percentage; Each components contents of said waterproofing mortar is: cement 25-36%; Sand 55%-65%, redispersable latex powder 0.5%-2%, hydroxypropyl methyl cellulose ether 0.1%-0.2%, inorganic water reducing agent 0.1%-0.3%, waterproofing agent of organosilicon 0.15%-0.4%, water glass 0.3%-0.7%, inorganic retarder 0.01%-0.04%, slag powders 2%-5%, coarse whiting 3%-5%, fine particle calcium carbonate 0.5%-2.0%, flyash 2%-3%, polypropylene fibre 0.04%-0.06%.
2. a kind of heat-insulation system according to claim 1 with polycrystalline anti-cracking and waterproofing mortar; It is characterized in that: by weight percentage, said thermal insulation mortar comprises following component: cement 60%-80%, redispersable latex powder 0.2%-0.3%, cold water type polyvinyl alcohol 0.5%-1.0%, hydroxypropyl methyl cellulose ether 0.1%-0.2%, air entraining agent 0.01%-0.03%, water glass 0.06%-0.1%, inorganic retarder 0.002%-0.01% and granular polystyrene 7%-12%, slag powders 3%-10%, coarse whiting 3%-5%, fine particle calcium carbonate 1%-4%, flyash 3%-12%, wood fibre 1%-3%, polypropylene fibre 0.5%-2%.
3. a kind of heat-insulation system according to claim 1 with polycrystalline anti-cracking and waterproofing mortar; It is characterized in that: by weight percentage, said boundary mortar comprises following component: cement 25%-38%, sand 55%-70%, redispersable latex powder 0.5%-2%, hydroxypropyl methyl cellulose ether 0.1%-0.2%, inorganic water reducing agent 0.1%-0.3%, water glass 0.3%-0.6%, inorganic retarder 0.01%-0.05%, slag powders 3%-5%.
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