CN104829203A - Desulfurization plaster light-weight aggregate thermal insulation mortar and preparing method thereof - Google Patents
Desulfurization plaster light-weight aggregate thermal insulation mortar and preparing method thereof Download PDFInfo
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- CN104829203A CN104829203A CN201510130290.6A CN201510130290A CN104829203A CN 104829203 A CN104829203 A CN 104829203A CN 201510130290 A CN201510130290 A CN 201510130290A CN 104829203 A CN104829203 A CN 104829203A
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Abstract
Desulfurization plaster light-weight aggregate thermal insulation mortar and a preparing method thereof are disclosed. The mortar comprises following raw materials by weight: 83-95 parts of desulfurization building plaster, 5-14 parts of polyphenyl granules, 0.2-1.0 part of cellulose ether, 0.3-1.1 parts of an air entraining agent, 0.1-0.5 part of a retarder, 0.2-0.6 part of starch ether and 85-130 parts of water. The beneficial effects of the mortar and the preparing method are that (1) solid wastes, namely the desulfurization plaster and waste foams, are utilized, thus reducing the production cost, reducing environment pollution and benefiting unification of environmental benefit, economic benefit and social benefit; (2) under the premise of ensuring strength, the material dry density and the heat conductivity coefficient are reduced furthest so as to overcome the contradiction that the strength, the dry density and the heat conductivity coefficient constraint mutually; (3) material thermal insulation performance is enhanced, so that the building energy-saving index requirements can be met effectively; and (4) product construction performance is good, and the mortar is suitable for outer-wall interior thermal insulation projects of new buildings, and suitable for outer-wall interior thermal insulation project reconstruction of existing buildings.
Description
Technical field
The invention belongs to solid waste comprehensive utilization and building energy saving field, relate to a kind of mortar for building, specifically a kind of desulfurated plaster light-weight aggregate thermal insulation mortar, and the preparation method of this mortar.
Background technology
At the beginning of 2014 Shanghai City town and country construction and Communications Commission associating Shanghai City housing support and building management office, Shanghai City fire department jointly issued " Shanghai City security housing energy-saving design in construction instruction " (hereinafter referred to as " instruction "), require " at the guarantee house of District of Shanghai, external wall preferentially should adopt exterior wall internal insulation system; The burning behavior class of architectural exterior-protecting construction inside thermal conservation material should lower than B1 level ", and execution in 1 day March in 2014.The execution of being somebody's turn to do " instruction " has greatly driven the development of Shanghai City area exterior wall internal insulation and corresponding product.
Past, inside thermal conservation material many on market was inorganic heat insulation material by the restriction of A level fire protection requirement.General employing cement or plaster of Paris are gelling material, are light aggregate with glass bead, then are aided with the polycomponents such as various admixtures and are composited, and have the advantage that fire line is good, thermal conductivity is low.And the desulphurization building gypsum utilizing desulphurization gypsum calcination to become is as the main raw of exterior wall internal insulation, the outlet of desulfurization gypsum powder can not only be solved, and gypsum is when presence of fire, crystal water can be discharged, play fireproofing function, desulphurization building gypsum has larger superiority as gelling material (comparing cement).But utilize glass bead substantially only can meet the requirement of existing standard specification as the thermal conductivity of the gypsum base inside holding mortar of light-weight aggregate; and the angle of 65% building energy conservation need be reached from Shanghai City; the thermal conductivity index value that existing standard specifications proposes gypsum base thermal insulation mortar is bigger than normal, can not meet energy-saving design requirement.Therefore, after B1 level of preventing fires is decontroled, the present invention utilizes granular polystyrene to replace glass bead as light-weight aggregate, effectively can reduce dry density and the thermal conductivity of mortar, improve the heat-insulating property of product, make the present invention can meet energy-saving index requirement.
Summary of the invention
The object of the invention is to provide a kind of desulfurated plaster light-weight aggregate thermal insulation mortar; To solve the problems referred to above of prior art.This thermal insulation mortar with desulfurated plaster through calcining after desulphurization building gypsum be gelling material, there is moderate strength, dry density is little, thermal conductivity is low, the feature of good heat insulating.
Another object of the present invention is the preparation method in order to provide this thermal insulation mortar.
The object of the invention is to be achieved through the following technical solutions:
A kind of desulfurated plaster light-weight aggregate thermal insulation mortar, comprises following raw material by weight:
Desulphurization building gypsum 83 ~ 95 parts; Granular polystyrene 5 ~ 14 parts; Ether of cellulose 0.2 ~ 1.0 part; Air entrapment agent 0.3 ~ 1.1 part; Retardant 0.1 ~ 0.5 part; Starch ethers 0.2 ~ 0.6 part; 85 ~ 130 parts, water.
Preferably, a kind of desulfurated plaster light-weight aggregate thermal insulation mortar, comprises following raw material by weight:
Desulphurization building gypsum 85 ~ 90 parts; Granular polystyrene 10 ~ 14 parts; Ether of cellulose 0.5 ~ 0.7 part; Air entrapment agent 0.7 ~ 0.9 part; Retardant 0.3 ~ 0.4 part; Starch ethers 0.3 ~ 0.5 part; 90 ~ 110 parts, water.
In above-mentioned desulfurated plaster light-weight aggregate thermal insulation mortar,
Described desulphurization building gypsum is that the desulfurated plaster being more than 85% by purity burns calcining generation slowly through low temperature, and 2h folding strength is more than or equal to 3.0MPa.
Described granular polystyrene be the particle diameter that is broken into by waste foam between 2 ~ 5mm, have the particle of good grain composition, loose bulk density is 12 ~ 16kg/m
3.
Described air entrapment agent is alkyl sodium sulfonate, being to introduce tiny, uniform bubble in a large number to mortar, reducing mortar unit weight, increasing heat-insulating property.
Described retardant is existing known technology, and the SC high-efficient retarder that Shanghai Construction Science Research Inst. openly produces, sells and uses, wherein five sodium-salt (Na5DTPA) composition of diethylene triaminepentaacetic acid(DTPA) accounts for more than 95%.
Described ether of cellulose is hydroxypropyl methyl cellulose ether (HPMC), range of viscosities: 100000cps ~ 200000cps.
The preparation method of above-mentioned desulfurated plaster light-weight aggregate thermal insulation mortar, the steps include:
(1) take starting material by above-mentioned weight part, in advance starting material (water and granular polystyrene except) are mixed;
(2) pour in stirrer by the water of weighing, be poured into water by starting material mixed in advance for step (1), leave standstill 1min, open stirrer, low rate mixing 2min, forms uniform slurry;
(3) add load weighted granular polystyrene in the slurry in step (2), then stir 1min, leave standstill 1 ~ 2min, the admixtures such as air entrapment agent wherein, ether of cellulose are played a role better; Obtain product.
The desulfurated plaster light-weight aggregate mortar that the present invention uses above-mentioned starting material to make, large dosage make use of industry by-product gypsum, industrial solid castoff of having dissolved, reduces the wasting of resources, alleviates again the pollution to environment, reaches energy-saving and emission-reduction, object of developing a circular economy.The ether of cellulose that the present invention adopts can improve water-retentivity and the cohesive force of mortar, this is because the water-absorbent of brick and metope is very strong, is easy to the water adsorption in mortar out, make the dehydration of mortar part, cohesive strength reduces, and after the present invention adds ether of cellulose, cohesive strength obviously increases.The air entrapment agent that the present invention adopts introduces tiny, uniform bubble in a large number to mortar, reduces mortar unit weight, increases heat-insulating property, also can prevent the sagging of granular polystyrene to a certain extent.The starch ethers that the present invention adopts plays thickening power, and can make mortar thickening, thickening, raising can workability.
Desulfurated plaster light-weight aggregate thermal insulation mortar thermal conductivity prepared by the present invention is little, minimum can < 0.060W/ (mK), far below the index request of gypsum base inorganic heat insulation mortar thermal conductivity≤0.10W/ (mK) in " inorganic heat insulation mortar system utilisation technology code " (DG/TJ08-2088-2011); Dry density 160kg/m
3~ 250kg/m
3, tensile bond strength about 0.10MPa, about ultimate compression strength 0.40MPa, solve general lagging material dry density, contradiction that thermal conductivity, ultimate compression strength three restrict mutually, when ensureing some strength grade, reduce dry density and the thermal conductivity of material to greatest extent, improve the heat-insulating property of material.
Main points of the present invention are: in the desulphurization building gypsum being applicable to prepare desulfurated plaster light-weight aggregate thermal insulation mortar, semi-hydrated gypsum phase content should be greater than 85%, remaining two aqueous phase content and must control respectively to be advisable below 4% without aqueous phase.Light skeletal should select grain composition preferably granular polystyrene after waste foam fragmentation.Add after light skeletal stirs, slurry should leave standstill 1 ~ 2min, makes ether of cellulose wherein, air entrapment agent can thickening better, plays a role.
The present invention is compared with domestic and international existing like product, and its difference is:
1, main raw of the present invention is solid waste---desulphurization building gypsum and waste foam, alleviate environmental pollution, is conducive to environmental protection and waste utilization;
2, under the prerequisite that product ensures in intensity, reduce dry density and thermal conductivity to greatest extent, ensure that the heat insulation effect of product, product, for building inside holding, can effectively meet index of construction energy conservation requirement;
3, the existing inorganic heat insulation mortar of the thermal conductivity ratio of desulfurated plaster light-weight aggregate mortar is low, and anti-dry-shrinkage cracking property is better than cement based thermal insulation mortar, and observable index cement based thermal insulation mortar is low, and workability is excellent.
4, be applicable to the exterior wall internal insulation engineering of new building, the exterior wall internal insulation being also applicable to existing building is engineered, and in its construction process, base course wall can not make screed-coat, and the irregularity degree of body of wall adjusts by increasing thermal insulation mortar thickness.Easy construction.
Beneficial effect of the present invention is:
(1) solid waste is utilized---desulfurated plaster and waste foam, reduce production cost, alleviate environmental pollution, be conducive to the unification realizing environmental benefit, economic benefit and social benefit;
(2) under the prerequisite of intensity guarantee, material dry density and thermal conductivity is reduced to greatest extent, the contradiction that solution intensity, dry density, thermal conductivity three restrict mutually;
(3) improve the heat-insulating property of material, make it effectively meet index of construction energy conservation requirement;
(4) product has good workability, and be applicable to the exterior wall internal insulation engineering of new building, the exterior wall internal insulation being also applicable to existing building is engineered.
Embodiment
Below by embodiment, the present invention will be further described.
The preparation method of embodiment 1-5 is:
(1) take starting material by weight, in advance starting material (except granular polystyrene) are mixed;
(2) pour in stirrer by the water of weighing, be poured into water by starting material (except granular polystyrene) mixed in advance, leave standstill 1min, open stirrer, low rate mixing 2min, forms uniform slurry;
(3) add load weighted granular polystyrene in the slurry in step (2), then stir 1min, leave standstill 1 ~ 2min, the admixtures such as air entrapment agent wherein, ether of cellulose are played a role better.
Embodiment 1
Get the material of following weight part:
Desulphurization building gypsum 95 parts, granular polystyrene 5 parts, ether of cellulose 0.2 part, air entrapment agent 0.3 part, retardant 0.4 part, starch ethers 0.2 part, 87 parts, water, by desulfurated plaster light-weight aggregate method for preparing mortar mixing and stirring.
Embodiment 2
Get the material of following weight part:
Desulphurization building gypsum 90 parts, granular polystyrene 10 parts, ether of cellulose 0.45 part, air entrapment agent 0.7 part, retardant 0.4 part, starch ethers 0.3 part, 95 parts, water, by desulfurated plaster light-weight aggregate method for preparing mortar mixing and stirring.
Embodiment 3
Get the material of following weight part:
Desulphurization building gypsum 88 parts, granular polystyrene 11 parts, ether of cellulose 0.53 part, air entrapment agent 0.8 part, retardant 0.35 part, starch ethers 0.4 part, 98 parts, water, by desulfurated plaster light-weight aggregate method for preparing mortar mixing and stirring.
Embodiment 4
Get the material of following weight part: desulphurization building gypsum 85 parts, granular polystyrene 14 parts, ether of cellulose 0.7 part, air entrapment agent 0.9 part, retardant 0.3 part, starch ethers 0.5 part, 110 parts, water, by desulfurated plaster light-weight aggregate method for preparing mortar mixing and stirring.
Embodiment 5
Get the material of following weight part:
Desulphurization building gypsum 83 parts, granular polystyrene 14 parts, ether of cellulose 0.8 part, air entrapment agent 0.9 part, retardant 0.4 part, starch ethers 0.6 part, 117 parts, water, by desulfurated plaster light-weight aggregate method for preparing mortar mixing and stirring.
Comparative example 1:
Inventive desulfurization gypsum light-weight aggregate mortar (granular polystyrene is as light-weight aggregate) and desulfurated plaster inorganic heat insulation mortar (glass bead is as light-weight aggregate) performance are compared; illustrate that desulfurated plaster light-weight aggregate mortar (granular polystyrene is as light-weight aggregate) has lower thermal conductivity, good heat insulation effect.
Get the material of following weight part:
Desulphurization building gypsum 60 parts, glass bead 38 parts, ether of cellulose 0.3 part, air entrapment agent 0.4 part, retardant 0.2 part, starch ethers 0.2 part, 120 parts, water, by desulfurated plaster light-weight aggregate method for preparing mortar mixing and stirring.In comparative example 1, the volume of glass bead is identical with granular polystyrene volume in embodiment 3.
The performance of the desulfurated plaster light-weight aggregate mortar that the embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4 and embodiment 5 is obtained and the desulfurated plaster thermal insulation mortar that comparative example 1 obtains, as shown in the table:
When light-weight aggregate volume is identical as can be seen from the above table, light-weight aggregate is the thermal insulation mortar dry density of glass bead, thermal conductivity is the thermal insulation mortar of granular polystyrene far above light-weight aggregate, and ultimate compression strength is without significantly improving.The desulfurated plaster light-weight aggregate thermal insulation mortar thermal conductivity of embodiment 2-4 is low, and ultimate compression strength is moderate, and material property is good.Above-described embodiment is only preference of the present invention, is not used for limiting the present invention, all within principle of the present invention, and any equivalent alternative, the modifications and variations done, all within protection scope of the present invention.
Claims (8)
1. a desulfurated plaster light-weight aggregate thermal insulation mortar, is characterized in that: comprise following raw material by weight:
Desulphurization building gypsum 83 ~ 95 parts; Granular polystyrene 5 ~ 14 parts; Ether of cellulose 0.2 ~ 1.0 part; Air entrapment agent 0.3 ~ 1.1 part; Retardant 0.1 ~ 0.5 part; Starch ethers 0.2 ~ 0.6 part; 85 ~ 130 parts, water.
2. a kind of desulfurated plaster light-weight aggregate thermal insulation mortar according to claim 1, is characterized in that: comprise following raw material by weight:
Desulphurization building gypsum 85 ~ 90 parts; Granular polystyrene 10 ~ 14 parts; Ether of cellulose 0.5 ~ 0.7 part; Air entrapment agent 0.7 ~ 0.9 part; Retardant 0.3 ~ 0.4 part; Starch ethers 0.3 ~ 0.5 part; 90 ~ 110 parts, water.
3. a kind of desulfurated plaster light-weight aggregate thermal insulation mortar according to claim 1 and 2, is characterized in that: described desulphurization building gypsum is that the desulfurated plaster being more than 85% by purity burns calcining generation slowly through low temperature, and 2h folding strength is more than or equal to 3.0MPa.
4. a kind of desulfurated plaster light-weight aggregate thermal insulation mortar according to claim 1 and 2, it is characterized in that: described granular polystyrene is that the particle diameter that is broken into by waste foam is between 2 ~ 5mm, have the particle of good grain composition, loose bulk density is 12 ~ 16kg/m
3.
5. a kind of desulfurated plaster light-weight aggregate thermal insulation mortar according to claim 1 and 2, is characterized in that: described air entrapment agent is alkyl sodium sulfonate.
6. a kind of desulfurated plaster light-weight aggregate thermal insulation mortar according to claim 1 and 2, it is characterized in that: described retardant is the SC high-efficient retarder that Shanghai Construction Science Research Inst. produces, and wherein the five sodium-salt composition of diethylene triaminepentaacetic acid(DTPA) accounts for more than 95%.
7. a kind of desulfurated plaster light-weight aggregate thermal insulation mortar according to claim 1 and 2, is characterized in that: described ether of cellulose is hydroxypropyl methyl cellulose ether, and range of viscosities is: 100000cps ~ 200000cps.
8., according to the preparation method of one of any described desulfurated plaster light-weight aggregate thermal insulation mortar of claim 1-7, it is characterized in that: the steps include:
(1) take starting material by weight, in advance the starting material except granular polystyrene and water are mixed;
(2) pour in stirrer by the water of weighing, be poured into water by starting material mixed in advance for step (1), leave standstill 1min, open stirrer, low rate mixing 2min, forms uniform slurry;
(3) add load weighted granular polystyrene in the slurry in step (2), then stir 1min, leave standstill 1 ~ 2min, obtain product.
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Cited By (8)
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| CN105347766A (en) * | 2015-10-23 | 2016-02-24 | 潍坊德霖建材科技有限公司 | Gypsum-based thermal insulation mortar used for pouring |
| CN105367030A (en) * | 2015-11-06 | 2016-03-02 | 江苏尼高科技有限公司 | Desulfurized-gypsum-base lightweight spraying gypsum mortar |
| CN106116416A (en) * | 2016-07-01 | 2016-11-16 | 上海市建筑科学研究院(集团)有限公司 | A kind of preparation method of navigation channel, entrance of Changjiang River dredging silt sand scratch coat Gypsum Fibrosum |
| CN111233416A (en) * | 2020-01-15 | 2020-06-05 | 重庆建大建筑材料有限公司 | Anti-cracking gypsum-based light material |
| CN111620652A (en) * | 2020-05-26 | 2020-09-04 | 甘肃华军建筑材料有限责任公司 | Formula and method for preparing light building thermal insulation material by foaming desulfurized gypsum |
| CN111620713A (en) * | 2020-05-21 | 2020-09-04 | 贵州开磷磷石膏综合利用有限公司 | Phosphogypsum-based light heat-preservation floor heating module and preparation method thereof |
| CN112624719A (en) * | 2020-12-23 | 2021-04-09 | 宁波汉华建材科技有限公司 | Preparation method of functional self-leveling mortar with heat preservation performance |
| CN112939559A (en) * | 2021-02-08 | 2021-06-11 | 沈阳金铠建筑科技股份有限公司 | Gypsum-based double-foaming pumping heat-preservation slurry and manufacturing method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347766A (en) * | 2015-10-23 | 2016-02-24 | 潍坊德霖建材科技有限公司 | Gypsum-based thermal insulation mortar used for pouring |
| CN105367030A (en) * | 2015-11-06 | 2016-03-02 | 江苏尼高科技有限公司 | Desulfurized-gypsum-base lightweight spraying gypsum mortar |
| CN106116416A (en) * | 2016-07-01 | 2016-11-16 | 上海市建筑科学研究院(集团)有限公司 | A kind of preparation method of navigation channel, entrance of Changjiang River dredging silt sand scratch coat Gypsum Fibrosum |
| CN111233416A (en) * | 2020-01-15 | 2020-06-05 | 重庆建大建筑材料有限公司 | Anti-cracking gypsum-based light material |
| CN111620713A (en) * | 2020-05-21 | 2020-09-04 | 贵州开磷磷石膏综合利用有限公司 | Phosphogypsum-based light heat-preservation floor heating module and preparation method thereof |
| CN111620652A (en) * | 2020-05-26 | 2020-09-04 | 甘肃华军建筑材料有限责任公司 | Formula and method for preparing light building thermal insulation material by foaming desulfurized gypsum |
| CN111620652B (en) * | 2020-05-26 | 2022-04-22 | 甘肃华军建筑材料有限责任公司 | Formula and method for preparing light building thermal insulation material by foaming desulfurized gypsum |
| CN112624719A (en) * | 2020-12-23 | 2021-04-09 | 宁波汉华建材科技有限公司 | Preparation method of functional self-leveling mortar with heat preservation performance |
| CN112939559A (en) * | 2021-02-08 | 2021-06-11 | 沈阳金铠建筑科技股份有限公司 | Gypsum-based double-foaming pumping heat-preservation slurry and manufacturing method thereof |
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Application publication date: 20150812 |