CN1673166A - Heat insulating mortar powder and its prepn process - Google Patents
Heat insulating mortar powder and its prepn process Download PDFInfo
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- CN1673166A CN1673166A CN 200410014380 CN200410014380A CN1673166A CN 1673166 A CN1673166 A CN 1673166A CN 200410014380 CN200410014380 CN 200410014380 CN 200410014380 A CN200410014380 A CN 200410014380A CN 1673166 A CN1673166 A CN 1673166A
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Abstract
The heat insulating mortar powder contains cementing material, foamed modified polystyrene grain, modified expanded pearlite, cementing material modifier and fiber. The foamed modified polystyrene grain contains foamed polystyrene grain, foamed polystyrene modifier and flyash; the modified expanded pearlite contains expanded pearlite, expanded pearlite modifier and sodium hydroxide; and the cementing material modifier contains polymer adhesive, air entraining and water reducing agent and flyash activator. The preparation process includes preparing foamed modified polystyrene grain, preparing modified expanded pearlite, preparing cementing material modifier, and mixing all the materials in certain proportion. The present invention has the advantages of small heat conducting coefficient, high compression strength, good construction performance, high adhering strength, etc.
Description
One, technical field
The present invention relates to a kind of material of construction and preparation method thereof, particularly a kind of heat-insulating mortar dry powder material and preparation method thereof
Two, background technology
Along with the raising that the building heat preserving heat-proof quality is required, various lagging materials use and give birth to, as thermal insulation mortar.Thermal insulation mortar kind in the market is more, be to be lagging material with the pearlstone mostly, make agglutinate with cement, gypsum etc., this class thermal insulation mortar has characteristics such as inexpensive, fire-resistant, that workability is good, but its used pearlstone water-intake rate is very big, and its weight water-intake rate can reach 200～900%.Mortar can be owing to shrinking appears in dehydration in the setting and harden process, and the stress that this contraction produces is the major cause that mortar hollowing, cracking occur, chaps, comes off.Also some thermal insulation mortar is to be lagging material with polystyrene foam particles (EPS), and this class thermal insulation mortar has advantages such as heat insulation property, chemical resistance be good.But because the EPS surface is a hydrophobic nature, incompatible with inorganic binder, the workability of this class thermal insulation mortar is poor, cohesive strength is low, is difficult for construction.Because the Young's modulus of EPS is very little, this thermal insulation mortar particularly thermal insulation mortar of low unit weight exists shrinkage strain big, the problem that ultimate compression strength is low in addition.
Three, summary of the invention
1, goal of the invention: the objective of the invention is deficiency at the prior art existence, propose a kind of by the surface modification lagging material with add agglutinate properties-correcting agent, thereby have high performance heat-insulating dried-powder mortar of characteristics such as thermal and insulating performance is good, cohesiveness good, ultimate compression strength is high, easy construction and preparation method thereof.
2, technical scheme: for achieving the above object, heat-insulating mortar dry powder material of the present invention is characterized in that component and proportioning (weight %) that this thermal insulation mortar contains are: agglutinate 55.0～90.0, foamed modified polystyrene grain 3.0～10.0, modified expanded perlite 2.0～18.0, agglutinate properties-correcting agent 1.0～15.0, fiber 0.2～2.0;
Wherein: foamed modified polystyrene grain by component that contains and proportioning (weight %) is: polystyrene foam particles 5.0～35.0, polystyrene modifier 1.0～15.0, flyash 50.0～90.0; Described polystyrene modifier is to be grouped into by at least a one-tenth in polyvinyl alcohol, polyethylene-vinyl acetate ester latex powder (VAE latex powder), Xylo-Mucine (CMC), Vltra tears (HPMC), Natvosol (HEC), the methylcellulose gum (MC);
Component that modified expanded perlite contains and proportioning (weight %) are: pearlstone 75.0～95.0, pearlstone properties-correcting agent 3.0～20.0, sodium hydroxide 1.0～5.0; Described pearlstone properties-correcting agent is alkyl dimethyl (2-hydroxyl-3-chloropropyl) ammonium chloride;
Component that agglutinate properties-correcting agent contains and proportioning (weight %) are: high polymer binder 30.0～60.0, gas tracting subtractive agent 20.0～50.0, flyash activator 20.0～50.0.
Described agglutinate is made up of 20-80% (weight) cement and 80-20% (weight) flyash or 20-80% (weight) cement and 80-20% (weight) gypsum.
Described fiber is a kind of in polypropylene fibre, lignin fibre, the alkali resistant glass fibre.
Described polystyrene foam particles is particle that is formed through fragmentation by the waste polystyrene foam or the particle that is formed by foamed polystyrene.
The particle diameter of described polystyrene foam particles is 1～4mm.
The carbon atom number of the alkyl in described alkyl dimethyl (2-hydroxyl-3-chloropropyl) ammonium chloride is 8～18.
Described high polymer binder is to be grouped into by at least a one-tenth in ether of cellulose, polyvinyl alcohol, VAE latex powder, polyacrylamide, the sodium polyacrylate.
Described gas tracting subtractive agent is to be grouped into by at least a one-tenth in wooden calcium, sodium abietate, Triton X-100 (OP), sodium lauryl sulphate, naphthalene series high-efficiency water-reducing agent, the polycarboxylic acid high efficiency water reducing agent.
Described flyash activator is soda ash and gives birth to aluminite powder or soda ash and alum stone flour.
The preparation method of heat-insulating dried-powder mortar of the present invention is characterized in that the steps include:
(1) preparation of foamed modified polystyrene grain: with described polystyrene modifier wiring solution-forming, evenly be sprayed at the surface of polystyrene foam particles, adding flyash stirs and makes;
(2) preparation of modified expanded perlite: described pearlstone properties-correcting agent is diluted to 4～5%, adds the sodium hydroxide stirring and dissolving, on pearlstone, oven dry makes under 100～110 ℃ with spray solution;
(3) preparation of agglutinate properties-correcting agent: described component is got by described proportioning is mixed;
(4) described agglutinate, foamed modified polystyrene grain, modified expanded perlite, agglutinate properties-correcting agent, fiber are promptly made heat-insulating dried-powder mortar by described proportioning mixing.
The present invention carries out modification to agglutinate by adding all kinds of properties-correcting agent, changes its performance, to reach: reduce rigidity, improve flexibility, folding/pressure ratio is increased; Improve water-fast, anti-permeability performance; Improve cohesive strength; Reduce unit weight, improve weathering resistance and freeze-thaw resistance; Improve workability.Wherein, by adding gas tracting subtractive agent, at first reduced the water consumption in the mortar use, to improve its intensity, make the inner microvesicle that does not connect mutually that forms of mortar simultaneously, reduce its unit weight, improve thermal and insulating performance and freezing and thawing performance, also can play the waterproofing and anti-leakage effect simultaneously.Selected domestic and international advanced person's macromolecular material in this external agglutinate properties-correcting agent, after several macromolecular materials mix, mutual collision between macromole and small molecules is carried out the fracture and the reorganization of molecular chain with attraction, formed composite high-molecular material, can improve the flexibility of thermal insulation mortar like this, its folding/pressure ratio is increased, also improved cohesive strength simultaneously, can exempt from conventional basic unit's interface processing.By macromole IPN thickening technology the toughness of material is strengthened simultaneously, antiskid bob ability strengthens, and improves workability.
The present invention carries out surface modification to lagging material (polystyrene foam particles, pearlstone), to reach: strengthen the consistency of EPS and inorganic binder, avoid layering, improve intensity; Reduce the water regain of pearlstone, avoid the cracking and the hollowing that produce therefrom; Carry out hydrophilic treatment by EPS, improve the consistency of itself and inorganic binder hydrophobic nature; Handle and pearlstone is made the part hydrophobic, reduce its water-absorbent, avoid the cracking and the hollowing that produce therefrom; EPS that will be after surface modification and pearlstone are made the thermal insulation mortar that lagging material and modified adhesive ramming material make, and can bring into play advantage separately, and it has energy-conserving and environment-protective, excellent performance, steady quality, cost performance is good, workability is good characteristics.
3, beneficial effect: the present invention compared with prior art, its remarkable advantage is: (1) thermal conductivity is little, and thermal and insulating performance is good.Be the main light skeletal except EPS in this mortar with good heat insulating, also added gas tracting subtractive agent, after mortar adds the water stirring, under the effect of air entrapment agent, can produce atomic small bubbles, form bubble small and don't that connect in mortar inside, strengthened heat insulating, the freezing and thawing performance of mortar.Simultaneously also can play the waterproofing and anti-leakage effect.(2) the ultimate compression strength height has good workability.Because EPS has been carried out surface modification treatment, make the EPS particle become wetting ability by hydrophobic nature, when Jia Shui mixed and stirred, the polar group of EPS particle surface absorption just interacted and combines closely with cement, thereby had effectively improved the ultimate compression strength of product.The modification on EPS surface simultaneously, it is wetting that the EPS particle is easy to by cement slurry, and it is evenly distributed in cement slurry, avoided general EPS thermal insulation mortar " come-up " phenomenon of EPS to occur when mixing and stirring, and the workability of product is good, and it is laborsaving easy to operate to plaster.(3) cohesive strength height can be exempted from base treatment.Owing in mortar, added multiple high polymer binder, utilize their performances separately and good synergistic effect, cohesive strength is improved greatly, use this product can exempt from base treatment, directly be applied in concrete walls and the various building blocks such as wall of newly laying bricks on, no cracking, hollowing, obscission generation.The adding of high polymer binder helps improving the flexibility of thermal insulation mortar, and folding/pressure ratio is increased.(4) the seepage control and crack resistance performance is good.Because pearlstone has been carried out surface modification, reduced its water regain, make it can be in the setting and harden process owing to shrinkage crack appears in a large amount of dehydrations.Also added in this external mortar through special process surface-treated dedicated fiber, homodisperse fiber connects and be the network of distributed in three dimensions, but its support aggregate on the one hand effectively reduces the segregation of aggregate, minimizing bleeding; Can effectively control the generation and the development of the inner microfracture of mortar on the other hand, prevent the fissured generation of penetrability.
Thermal insulation mortar Main physical mechanical performance index of the present invention is as follows:
| Project | Unit | Index |
| Aerated density thermal conductivity ultimate compression strength cohesive strength linear shrinkage ratio water ratio | ????Kg/m 3????W/m·K ????MPa ????MPa ????％ ????％ | ????≤450 ????≤0.08 ????≥1.8 ????≥0.25 ????≤0.3 ????≤4.0 |
Four, embodiment
Embodiment 1: component that heat-insulating dried-powder mortar contains and proportioning (weight %) are: agglutinate 60, foamed modified polystyrene grain 5, modified expanded perlite 18, agglutinate properties-correcting agent 15, fiber 2.
Wherein: foamed modified polystyrene grain by component that contains and proportioning (weight %) is: polystyrene foam particles 5, polystyrene modifier 15, flyash 80; Described polystyrene modifier is polyvinyl formal (also can be that at least a one-tenth is grouped among polyvinyl alcohol, VAE latex powder, CMC, HPMC, HEC, the MC.);
Component that modified expanded perlite contains and proportioning (weight %) are: pearlstone 75, pearlstone properties-correcting agent 20, sodium hydroxide 5; Described pearlstone properties-correcting agent is alkyl dimethyl (2-hydroxyl-3-chloropropyl) ammonium chloride, and the carbon atom number of alkyl is 8.
Component that agglutinate properties-correcting agent contains and proportioning (weight %) are: high polymer binder 30, gas tracting subtractive agent 50, flyash activator 20.
Described agglutinate is by 80% (weight) cement and 20% (weight) flyash (perhaps 20% cement and 80% gypsum are formed).
Described fiber is a polypropylene fibre.
Described polystyrene foam particles is the particle that is formed through fragmentation by the waste polystyrene foam, and particle diameter is 1～4mm.
Described high polymer binder is to be ether of cellulose (also can be that at least a one-tenth is grouped in ether of cellulose, polyvinyl alcohol, VAE latex powder, polyacrylamide, the sodium polyacrylate).
Described gas tracting subtractive agent is wooden calcium (also can be that at least a one-tenth is grouped in wooden calcium, sodium abietate, OP, sodium lauryl sulphate, naphthalene series high-efficiency water-reducing agent, the polycarboxylic acid high efficiency water reducing agent).
Described flyash activator is soda ash and gives birth to the aluminite powder.
The preparation method of heat-insulating dried-powder mortar is:
(1) preparation of foamed modified polystyrene grain: with described polystyrene modifier wiring solution-forming, evenly be sprayed at the surface of polystyrene foam particles, adding flyash stirs and makes;
(2) preparation of modified expanded perlite: described pearlstone properties-correcting agent is diluted to 4-5%, adds the sodium hydroxide stirring and dissolving, on pearlstone, oven dry makes under 100-110 ℃ with spray solution;
(3) preparation of agglutinate properties-correcting agent: described component is got by described proportioning is mixed;
(4) described agglutinate, foamed modified polystyrene grain, modified expanded perlite, agglutinate properties-correcting agent, fiber are promptly made heat-insulating dried-powder mortar by described proportioning mixing.
Embodiment 2: component that heat-insulating dried-powder mortar contains and proportioning (weight %) are: agglutinate 90, foamed modified polystyrene grain 3, modified expanded perlite 2, agglutinate properties-correcting agent 4, fiber 1.
Wherein: foamed modified polystyrene grain by component that contains and proportioning (weight %) is: polystyrene foam particles 35, polystyrene modifier 1, flyash 64; Described polystyrene modifier mixes (also can be at least a among polyvinyl alcohol, VAE latex powder, CMC, HPMC HEC, the MC. become to be grouped into) by polyvinyl alcohol with the VAE latex powder;
Component that modified expanded perlite contains and proportioning (weight %) are: pearlstone 95, pearlstone properties-correcting agent 3, sodium hydroxide 2; Described pearlstone properties-correcting agent is alkyl dimethyl (2-hydroxyl-3-chloropropyl) ammonium chloride, and the carbon atom number of alkyl is 18.
Component that agglutinate properties-correcting agent contains and proportioning (weight %) are: high polymer binder 60, gas tracting subtractive agent 20, flyash activator 20.
Described agglutinate is by 20% (weight) cement and 80% (weight) flyash (perhaps 80% cement and 20% gypsum are formed).
Described fiber is a lignin fibre.
Described polystyrene foam particles is the particle that is formed by foamed polystyrene, and particle diameter is 1～4mm.
To be ether of cellulose with polyvinyl alcohol mix described high polymer binder forms (also can be at least a in ether of cellulose, polyvinyl alcohol, VAE latex powder, polyacrylamide, the sodium polyacrylate become to be grouped into).
To be wooden calcium form with sodium abietate described gas tracting subtractive agent (also can be at least a in wooden calcium, sodium abietate, OP, sodium lauryl sulphate, naphthalene series high-efficiency water-reducing agent, the polycarboxylic acid high efficiency water reducing agent become to be grouped into).
Described flyash activator is soda ash and alum stone flour.
The preparation method of heat-insulating dried-powder mortar is same as embodiment 1.
Embodiment 3: component that heat-insulating dried-powder mortar contains and proportioning (weight %) are: agglutinate 80, foamed modified polystyrene grain 9.8, modified expanded perlite 10, agglutinate properties-correcting agent, fiber 0.2.
Wherein: foamed modified polystyrene grain by component that contains and proportioning (weight %) is: polystyrene foam particles 20, polystyrene modifier 8, flyash 72; Described polystyrene modifier mixes (also can be at least a among polyvinyl alcohol, VAE latex powder, CMC, the HPMC HECMC. become to be grouped into) by polyvinyl alcohol with VAE latex powder, CMC;
Component that modified expanded perlite contains and proportioning (weight %) are: pearlstone 85, pearlstone properties-correcting agent 10, sodium hydroxide 5; Described pearlstone properties-correcting agent is alkyl dimethyl (2-hydroxyl-3-chloropropyl) ammonium chloride, and the carbon atom number of alkyl is 9.
Component that agglutinate properties-correcting agent contains and proportioning (weight %) are: high polymer binder 45, gas tracting subtractive agent 30, flyash activator 25.
Described agglutinate is by 50% (weight) cement and 50% (weight) flyash (perhaps 50% cement and 50% gypsum are formed).
Described fiber is an alkali resistant glass fibre.
Described polystyrene foam particles is the particle that is formed by foamed polystyrene, and particle diameter is 1～4mm.
Described high polymer binder is that ether of cellulose mixes (also can be at least a in ether of cellulose, polyvinyl alcohol, VAE latex powder, polyacrylamide, the sodium polyacrylate become to be grouped into) with polyvinyl alcohol, VAE latex powder.
To be wooden calcium form with sodium abietate, sodium lauryl sulphate described gas tracting subtractive agent (also can be at least a in wooden calcium, sodium abietate, OP, sodium lauryl sulphate, naphthalene series high-efficiency water-reducing agent, the polycarboxylic acid high efficiency water reducing agent become to be grouped into).
Described flyash activator is soda ash and alum stone flour.
The preparation method of heat-insulating dried-powder mortar is same as embodiment 1.
Claims (10)
1, a kind of heat-insulating dried-powder mortar is characterized in that component and proportioning (weight %) that this thermal insulation mortar contains are: agglutinate 55.0～90.0, foamed modified polystyrene grain 3.0～10.0, modified expanded perlite 2.0～18.0, agglutinate properties-correcting agent 1.0～15.0, fiber 0.2～2.0;
Wherein: foamed modified polystyrene grain by component that contains and proportioning (weight %) is: polystyrene foam particles 5.0～35.0, polystyrene modifier 1.0～15.0, flyash 50.0～90.0; Described polystyrene modifier is to be grouped into by at least a one-tenth in polyvinyl alcohol, polyethylene-vinyl acetate ester latex powder, Xylo-Mucine, Vltra tears, Natvosol, the methylcellulose gum;
Component that modified expanded perlite contains and proportioning (weight %) are: pearlstone 75.0～95.0, pearlstone properties-correcting agent 3.0～20.0, sodium hydroxide 1.0～5.0; Described pearlstone properties-correcting agent is alkyl dimethyl (2-hydroxyl-3-chloropropyl) ammonium chloride;
Component that agglutinate properties-correcting agent contains and proportioning (weight %) are: high polymer binder 30.0～60.0, gas tracting subtractive agent 20.0～50.0, flyash activator 20.0～50.0.
2, heat-insulating dried-powder mortar according to claim 1 is characterized in that described agglutinate is made up of 20-80% (weight) cement and 80-20% (weight) flyash or 20-80% (weight) cement and 80-20% (weight) gypsum.
3, heat-insulating dried-powder mortar according to claim 1 is characterized in that described fiber is a kind of in polypropylene fibre, lignin fibre, the alkali resistant glass fibre.
4, heat-insulating dried-powder mortar according to claim 1 is characterized in that described polystyrene foam particles is particle that is formed through fragmentation by the waste polystyrene foam or the particle that is formed by foamed polystyrene.
5, heat-insulating dried-powder mortar according to claim 4, the particle diameter that it is characterized in that described polystyrene foam particles is 1～4mm.
6, heat-insulating dried-powder mortar according to claim 1 is characterized in that the carbon atom number of the alkyl in described alkyl dimethyl (2-hydroxyl-3-chloropropyl) ammonium chloride is 8～18.
7, heat-insulating dried-powder mortar according to claim 1 is characterized in that described high polymer binder is to be grouped into by at least a one-tenth in ether of cellulose, polyvinyl alcohol, polyethylene-vinyl acetate ester latex powder, polyacrylamide, the sodium polyacrylate.
8, heat-insulating dried-powder mortar according to claim 1 is characterized in that described gas tracting subtractive agent is to be grouped into by at least a one-tenth in wooden calcium, sodium abietate, Triton X-100, sodium lauryl sulphate, naphthalene series high-efficiency water-reducing agent, the polycarboxylic acid high efficiency water reducing agent.
9, heat-insulating dried-powder mortar according to claim 1 is characterized in that described flyash activator is soda ash and gives birth to aluminite powder or soda ash and alum stone flour.
10, the preparation method of the described heat-insulating dried-powder mortar of claim 1 is characterized in that the steps include:
(1) preparation of foamed modified polystyrene grain: with described polystyrene modifier wiring solution-forming, evenly be sprayed at the surface of polystyrene foam particles, adding flyash stirs and makes;
(2) preparation of modified expanded perlite: described pearlstone properties-correcting agent is diluted to 4～5%, adds the sodium hydroxide stirring and dissolving, on pearlstone, oven dry makes under 100～110 ℃ with spray solution;
(3) preparation of agglutinate properties-correcting agent: described component is got by described proportioning is mixed;
(4) described agglutinate, foamed modified polystyrene grain, modified expanded perlite, agglutinate properties-correcting agent, fiber are promptly made heat-insulating dried-powder mortar by described proportioning mixing.
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