CN1228271C - Gypsum substrate render material - Google Patents
Gypsum substrate render material Download PDFInfo
- Publication number
- CN1228271C CN1228271C CN 02138588 CN02138588A CN1228271C CN 1228271 C CN1228271 C CN 1228271C CN 02138588 CN02138588 CN 02138588 CN 02138588 A CN02138588 A CN 02138588A CN 1228271 C CN1228271 C CN 1228271C
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- gypsum
- present
- add
- brushing
- plastering
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Abstract
The present invention relates to a building gypsum substrate brushing material. Beta gypsum with the ingredient of beta-CaSO4.1/2H2O is used as raw materials; 0.1 to 1 wt% of anhydrous citric acid or salt coagulation regulators of the anhydrous citric acid are added into 99 to 99.9 wt% of the beta gypsum. The present invention has strong adhesive force, effectively avoids shrinkage crack phenomenon during gypsum brushing, perfectly solves the general problems of vacant shell, crack, desquamation, etc. during cement mortar brushing and cement lime mortar brushing, and has good surface decoration performance, good fire prevention performance and good heat preservation and heat insulation performance. Products of the present invention have the advantages of convenient construction, short construction period (compared with the cement mortar, the construction period is shortened by about 20%), simple production process and low production cost. The building gypsum substrate brushing material of the present invention has the automatic moisture absorption and release capability in the hardening process according to the environment humidity, so the indoor humidity can be expertly controlled in a proper range. The looseness volume weight is 900 kg/m<3>, is 50% of that of cement and is 75% of that of quicklime, so the present invention has the active effect on reducing the self weight of buildings.
Description
Technical field
The present invention relates to a kind of building plastering material, particularly a kind of building brushing gypsum.
Background technology
At present, in building trade, country has banned use of clay solid brick, and uses novel wall materials such as building block, sheet material instead.Original plastering material such as sand-cement slurry, mixed mortar etc., the surface that can not adapt to above-mentioned novel wall material is whitewashed, and phenomenon such as hollowing can occur, ftracture, come off influences construction quality.But the building plastering material that does not also have a kind of ideal and novel wall material to be suitable for mutually up to the present.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, and it is strong to propose a kind of cohesive force, and easy construction can guarantee the gypsum base plastering material of construction quality.
Purpose technical solution of the present invention:
A kind of gypsum base plastering material is characterized in that it is β-CaSO with the composition
41/2H
2The β gypsum of O is a raw material, and the adjustable solidification agent that adds Citric Acid, usp, Anhydrous Powder mixes to be made, and their weight percent is:
β gypsum 99-99.9%
The adjustable solidification agent 0.1-1% of Citric Acid, usp, Anhydrous Powder;
And in this plastering material, adding the water-holding agent of Vltra tears, its add-on is the 0.1%-1% of raw material weight total amount.
The present invention is a kind of novel building plastering material that utilizes beta-type semi-hydrated gypsum to produce, and the inner, external wall that is mainly used in building whitewashes, and the key distinction of it and conventional cement mortar (containing mortar) is:
1, cohesive force is strong: brushing gypsum almost all has adhesive property preferably with various body of wall base materials, and the Shi Buxu that plasters whitewashes any interfacial agents, once survives; Owing to have the microdilatancy performance, the shrinkage cracking phenomenon in having suppressed effectively to plaster, common fault such as solved the hollowing that sand-cement slurry, mixed mortar are plastered preferably, ftracture, come off.
2, have that surface of good is ornamental, fire resistance and thermal and insulating performance.
3, the duration is saved in easy construction, and the construction time, comparable sand-cement slurry shortened about 20%.
4, have breathing and health care function: brushing gypsum of the present invention can absorb automatically according to the humidity of environment in process of setting and discharge moisture, indoor humidity is controlled within the suitable scope dexterously.
5, light weight: the loose volume weight of gypsum base plastering material is 900Kg/m
3, be respectively cement 50%, unslaked lime 75%, the deadweight that alleviates buildings is had positive meaning.
6, production technique of the present invention is simple, and production cost is low.
Embodiment
Gypsum base plastering material of the present invention, it is with β gypsum (β-CaSO
41/2H
2O) be raw material, the adjustable solidification agent that adds Citric Acid, usp, Anhydrous Powder or its esters mixes to be made, and their weight percent is:
β gypsum 99-99.9%
The adjustable solidification agent 0.1-1% of Citric Acid, usp, Anhydrous Powder or its esters (best 0.2-0.5%).
In order to improve the use effect of plastering material of the present invention, can add water-holding agent, thickening material and filler, they can add separately, also can mix adding arbitrarily, add-on is respectively 0.1%-1%, 0.1%-1%, the 10%-50% of raw material weight total amount, and the best is respectively: 0.2%-0.5%, 0.2%-0.5%, 20%-30%.
Above-mentioned water-holding agent can be selected methylcellulose gum class water-holding agent for use, as Vltra tears, it be used for plastering material of the present invention is actual use in the volatilization of water mixing rear defence sealing part.
Thickening material can be selected polyvinyl alcohol or Vinyl Acetate Copolymer class thickening material for use, and as polyvinyl alcohol 2488, poly-acetic acid ethylene glycol etc., it is used for mixing with water the denseness of back increase slurry in the actual use of plastering material of the present invention.
Filler can be selected titanium dioxide, calcite in powder and lime etc. for use, and it is used for improving the whiteness of product on the one hand, can be used to reduce product cost on the other hand.
Embodiment 1:
The citric acid powder of getting 99.1 kilograms β gypsum and 0.9 kilogram mixes and can obtain plastering material of the present invention.Vltra tears and/or 0.2 kilogram the polyvinyl alcohol 2488 and/or 30 kilograms the lime that can add 0.5 kilogram simultaneously are mixed together evenly again.
Embodiment 2:
The stubborn lemon acid sodium powder of getting 99.5 kilograms β gypsum and 0.5 kilogram mixes and can obtain plastering material of the present invention.Vltra tears and/or 0.9 kilogram the poly-acetic acid ethylene glycol and/or 10 kilograms the calcite in powder that can add 0.1 kilogram simultaneously are mixed together evenly again.
Embodiment 3;
The citric acid calcium powder of getting 99.9 kilograms β gypsum and 0.1 kilogram mixes and can obtain plastering material of the present invention.Vltra tears and/or 0.6 kilogram the polyvinyl alcohol 2488 and/or 50 kilograms the titanium dioxide that can add 0.9 kilogram simultaneously are mixed together evenly again.
During use, plastering material of the present invention is directly promptly obtained gypsum base with the water mediation whitewash slurry, be useful in whitewashing on the inside and outside body of wall of construction work, phenomenon such as solved hollowing, ftracture, come off.
The present invention utilizes β gypsum (β-CaSO
41/2H
2O), a kind of New Building Materials of forming such as lime, adjustable solidification agent, water-holding agent, thickening material, be mainly used in the plastering material of construction work inner, external wall, its gordian technique is to select rational filler, adjustable solidification agent and water-holding agent, thickening material.Because of adding behind the water rate of set, the β gypsum accelerates (general initial set is at 6-10min), can't satisfy every index request of brushing gypsum, in order to satisfy plastering construction, require the slow (initial set＞1h of rate of set of brushing gypsum product, final set＜8h), must in the β gypsum, add an amount of adjustable solidification agent, through gypsum is used always adjustable solidification agent such as tartrate, citric acid and its esters, phosphoric acid salt, borax, starch, over-all properties such as boron-moisten soil and water reducer compares, it is the adjustable solidification agent of gypsum base plastering material that the present invention adopts Citric Acid, usp, Anhydrous Powder or its esters, price is low, the market wide material sources.
When plastering with brushing gypsum, make the cohesive force of certain moisture content, coat of plaster and basic unit of mortar energy long period maintenance for the workability that improves gypsum lime mortar, guarantee smooth, the leakless of coat of plaster, simultaneously, require the brushing gypsum slip to have good water-retentivity again, because good water-holding agent can make the abundant aquation of brushing gypsum, guarantee necessary strength, so in brushing gypsum, mix certain water-holding agent.Product of the present invention selects ether of cellulose as water-holding agent, because the water retention property of water-holding agent is relevant with addition with the viscosity of ether of cellulose: viscosity is high more, and water-retentivity is good more; Addition is big more, and water-retentivity is good more.Take all factors into consideration economy, the viscosity of ether of cellulose is advisable at 30000-70000PaS, and volume is 0.1%-1%.
Cement based, gypsum base powder building materials all have a common common fault, promptly easily the cracking, hollowing.This is because often expanded with heat and contract with cold after the moulding of powder building materials and weather, temperature, humidity etc. influence, and are dry, as to ftracture, come off etc. that phenomenon happens occasionally, especially material meet water and stressed after, it is serious that this phenomenon more becomes.For this reason, the product of the present invention method selecting to mix an amount of thickening material reaches the product anticracking and increases elastic effect.The volume of thickening material is 0.1%-1%.
Claims (8)
1, a kind of gypsum base plastering material is characterized in that it is β-CaSO with the composition
41/2H
2The β gypsum of O is a raw material, and the adjustable solidification agent that adds Citric Acid, usp, Anhydrous Powder mixes to be made, and their weight percent is:
β gypsum 99-99.9%
The adjustable solidification agent 0.1-1% of Citric Acid, usp, Anhydrous Powder;
And in this plastering material, adding the water-holding agent of Vltra tears, its add-on is the 0.1%-1% of raw material weight total amount.
2, by the described gypsum base plastering material of claim 1, the weight percent that it is characterized in that the adjustable solidification agent of described Citric Acid, usp, Anhydrous Powder is 0.2-0.5%.
3, by the described gypsum base plastering material of claim 1, the water-holding agent add-on that it is characterized in that described Vltra tears is the 0.2%-0.5% of raw material weight total amount.
4, by the described gypsum base plastering material of claim 1, it is characterized in that in plastering material, adding thickening material and filler, they or add separately, or mix arbitrarily and add.
5, by the described gypsum base plastering material of claim 4, it is characterized in that the thickening material and the filler that in plastering material, add, its add-on is respectively 0.1%-1%, the 10%-50% of raw material weight total amount.
6, by the described gypsum base plastering material of claim 5, it is characterized in that in plastering material, adding thickening material and filler, its add-on is respectively the raw material weight total amount: 0.2%-0.5%, 20%-30%.
7,, it is characterized in that described thickening material selects polyvinyl alcohol or Vinyl Acetate Copolymer class thickening material for use by the described gypsum base plastering material of claim 4.
8,, it is characterized in that described thickening material selects polyvinyl alcohol 2488 or poly-acetic acid ethylene glycol for use by the described gypsum base plastering material of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138588 CN1228271C (en) | 2002-11-14 | 2002-11-14 | Gypsum substrate render material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138588 CN1228271C (en) | 2002-11-14 | 2002-11-14 | Gypsum substrate render material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1482092A CN1482092A (en) | 2004-03-17 |
| CN1228271C true CN1228271C (en) | 2005-11-23 |
Family
ID=34147259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02138588 Expired - Fee Related CN1228271C (en) | 2002-11-14 | 2002-11-14 | Gypsum substrate render material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1228271C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1309672C (en) * | 2005-03-31 | 2007-04-11 | 詹木旺 | Gypsum inner wall powder and its preparation method |
| CN101851075B (en) * | 2010-05-04 | 2012-07-04 | 上海每天节能环保科技有限公司 | Bottom layer brushing gypsum and application thereof |
| CN102765920A (en) * | 2011-05-05 | 2012-11-07 | 厦门东顺涂料有限公司 | Edge and corner shaping agent |
| CN104710151B (en) * | 2015-02-04 | 2016-08-24 | 贵州开磷集团股份有限公司 | Stone floor and preparation method thereof imitated by a kind of semi-hydrated gypsum base material |
| CN108840643A (en) * | 2018-07-24 | 2018-11-20 | 深圳港创建材股份有限公司 | A kind of surface layer brushing gypsum mortar and preparation method thereof |
-
2002
- 2002-11-14 CN CN 02138588 patent/CN1228271C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1482092A (en) | 2004-03-17 |
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Owner name: JIANGSU EFFUL NEW MATERIAL TECHNOLOGY SCIENCE AND Free format text: FORMER OWNER: NANJING EFFUL CO., LTD. Effective date: 20081107 |
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Effective date of registration: 20081107 Address after: Jiangsu Nanjing Dongshan Gaoqiao industrial concentration area Patentee after: Zhejiang Efful New Material Science and Technology Co., Ltd. Address before: The business center No. 2 Nanjing Huaihailu Road city in Jiangsu province 501 Patentee before: Nanjing Efful Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051123 Termination date: 20141114 |
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