CN101560076A - Compound water-repellent gypsum additive - Google Patents
Compound water-repellent gypsum additive Download PDFInfo
- Publication number
- CN101560076A CN101560076A CNA2009100152501A CN200910015250A CN101560076A CN 101560076 A CN101560076 A CN 101560076A CN A2009100152501 A CNA2009100152501 A CN A2009100152501A CN 200910015250 A CN200910015250 A CN 200910015250A CN 101560076 A CN101560076 A CN 101560076A
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- Prior art keywords
- gypsum
- component
- water
- weight ratio
- paraffin
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a compound water-repellent gypsum additive, comprising a component A and a component B, with weight ratio of 1-5:2-6; the component A is paraffin/polyvinyl alcohol emulsion which is prepared by stirring and emulsifying the paraffin, polyvinyl alcohol, water and emulsifiers at high speed based on the weight ratio of 5-40:2-8:100-200:0.25-2; sodium sulfate, methyl cellulose and other auxiliary agents can be added to the above mixture; the weight ratio of the paraffin, sodium sulfate and methyl cellulose addition is 5-40:1-2:0.1-0.2; the component B is an inorganic salt water-repellent additive which is prepared by mixing alunite powder and slag powder based on the weight ratio of 5-8:20-40. The compound water-repellent gypsum additive prepared by the invention is free from toxicity and irritation and even in distribution, and effectively improves the water-repellent property of gypsum.
Description
Technical field
The present invention relates to a kind of composite waterproofing agent of gypsum, be specifically related to a kind of can give the product that makes by the gypsum slip such as plasterboard or gypsum wallboard better waterproof can composite waterproofing agent of gypsum, belong to the water-proof building material technical field.
Background technology
Adopt gypsum to manufacture materials for wall, have advantages such as starting material wide material sources, the material produce energy consumption is low, processing performance is good.But gypsum also has the weakness of himself, and the most outstanding weakness is its goods poor water resistance.Major cause is:
(1) in the whipping process of gypsum slip, mixed far above semi-hydrated gypsum in theory and changed the needed water yield of dihydrate gypsum into, after the gypsum slurry sclerosis, redundant moisture will be overflowed from hardenite, thereby produce a large amount of tiny cracks and pore, and these holes connect mutually, as long as the gypsum hardenite surface touches moisture, moisture will soon be penetrated into hardenite inside, and moisture can change direction repeatedly and move in hardenite, causes the gypsum hardenite water-intake rate bigger;
(2) since the solubleness of dihydrate gypsum (CaSO42H2O) compare with cement stone much bigger, so the water tolerance of gypsum hardenite is relatively poor.
Above-mentioned reason makes and the application of plastering in some occasion of water resistance difference has been subjected to bigger restriction, can not satisfy modern architecture and the people needs to the Modern Residence level of comfort.In order to overcome this defective, common way is to add single hydrophobic nature material in making plastering forward direction gypsum slip, such as pitch or stearic acid etc., and must add with the form of emulsion, guarantees itself and gypsum slip thorough mixing.Adopt the example of the single stearic acid emulsion of this admixture that introduction is all arranged in United States Patent (USP) 4-748-196,5-437-722.
Adopt single liquid-tight manner to improve the water resistance of plastering to a certain extent, but effect is still undesirable, and also has some shortcomings.For example stearic acid emulsion, bitumen emulsion etc. are general unstable, and separate easily becomes water and floating thereon oil phase.The oily matter that these are separated is difficult for disperseing in the gypsum slip, only waterproof action is played in the part of plastering, causes the integral waterproofing of plastering poor.
Summary of the invention
The invention provides a kind of composite waterproofing agent of gypsum,, instability poor, the narrow problem of range of application with the water resistance that solves plastering in the prior art.
The present invention is achieved by the following technical solutions:
Described composite waterproofing agent of gypsum, by weight ratio is two kinds of components formations of A, B of 1-5: 2-6, the A component is paraffin-polyvinyl alcohol emulsion, is made according to the weight ratio high-speed stirring emulsification of 5-40: 2-8: 100-200: 0.25-2 by paraffin, polyvinyl alcohol, water and emulsifying agent; The B component is the inorganic salts water-resisting agent, is mixed by alum stone flour and the slag micropowder weight ratio according to 5-8: 20-40.
For improving the performance of product of the present invention, also comprise sodium sulfate and methylcellulose gum in the A component, the weight ratio of paraffin, sodium sulfate, methylcellulose gum add-on is 5-40: 1-2: 0.1-0.2.
Described emulsifying agent is a kind of compound anion surfactant, and its HLB value is between 8-9.
Described alum stone flour is levigated 320 order alum stone flours, and described slag micropowder is levigated 320 a purposes ironmaking tailings.
In the gypsum hydration process, the A component can not only form organic film that blocks water in gypsum particle surface and gypsum hardenite, and forms hydrophobic surface; The inorganic salts water-resisting agent of B component on the one hand can with the Ca in the gypsum slip
2+Reaction generates the ettringite phase that is insoluble in water, and volume expands in the generative process of ettringite, has the effect of pore in the refinement gypsum hardenite; Form inorganic flocculation sediment in addition, stop up the pore in the gypsum hardenite, reduce the solvability of gypsum.
The preparation method of product of the present invention mainly may further comprise the steps:
The preparation of A component: paraffin, high-molecular polyvinyl alcohol polymkeric substance is dissolved in by the weight ratio of prescription in 95-100 ℃ the water, adds emulsifying agent and other auxiliary agents, be emulsified into paraffin-polyvinyl alcohol emulsion under the high-speed stirring condition; The preparation of B component: alum stone flour and slag micropowder are uniformly mixed into pulverulent solids by the weight ratio of filling a prescription.
During use, A, B component added successively mixing gets final product in the gypsum.
Beneficial effect of the present invention: this composite waterproofing agent of gypsum is to be made of jointly the A component of emulsion form and pulverous B component, and nontoxic, non-stimulated, homodisperse, Yi Yushui are arbitrarily than mixing.A component in this composite waterproofing agent of gypsum can form organic film and hydrophobic surface of blocking water in gypsum particle surface and gypsum hardenite; Pore in the B component energy refinement gypsum hardenite forms inorganic flocculation sediment simultaneously, stops up the pore in the gypsum hardenite, reduces the solvability of gypsum in water, makes hardenite more closely knit, thereby has strengthened water resistance.
This composite waterproofing agent of gypsum can be widely used in the waterproof of gypsum based articles such as plasterboard, gypsum wallboard, gypsum block.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
Getting 3 parts in 10 parts in paraffin, polyvinyl alcohol, to be dissolved in 100 parts of temperature be in 100 ℃ the water, add 0.3 part of HLB value and be 8 compound anion surfactant as emulsifying agent, be emulsified into paraffin-polyvinyl alcohol emulsion under the high-speed stirring condition, make composite waterproofing agent of gypsum A component; Get 5 parts of 320 order alum stone flours, 320 purpose slag micropowders are made composite waterproofing agent of gypsum B component for 20 parts.
From the above-mentioned composite waterproofing agent of gypsum of making, get A component 50 grams, B component 30 grams, water 650 grams, terra alba 1000 grams stirred 2 minutes in the JS-195A mortar mixer, gypsum is evenly, the slurry of good fluidity, inject three gang mould tools and the vibratory compaction of 40 * 40 * 160mm, moulding demoulding after 1 hour.
Embodiment 2
Getting 5 parts in 40 parts in paraffin, polyvinyl alcohol, to be dissolved in 200 parts of temperature be in 95 ℃ the water, add 2 parts of HLB values and be 9 compound anion surfactant as emulsifying agent, 2 parts in sodium sulfate, 0.1 part of methylcellulose gum, be emulsified into paraffin-polyvinyl alcohol emulsion under the high-speed stirring condition, make composite waterproofing agent of gypsum A component; Get 8 parts of 320 purpose alum stone flours, 320 purpose slag micropowders are made composite waterproofing agent of gypsum B component for 40 parts.
From the above-mentioned composite waterproofing agent of gypsum of making, get A component 35 grams, B component 60 grams, water 650 grams, terra alba 1000 grams are with method moulding, the demoulding of embodiment 1.
Embodiment 3
Getting 8 parts in 15 parts in paraffin, polyvinyl alcohol, to be dissolved in 150 parts of temperature be in 95 ℃ the water, add 0.8 part of HLB value and be 8 compound anion surfactant as emulsifying agent, 1 part in sodium sulfate, 0.2 part of methylcellulose gum, be emulsified into paraffin-polyvinyl alcohol emulsion under the high-speed stirring condition, make composite waterproofing agent of gypsum A component; Get 7 parts of 320 purpose alum stone flours, 320 purpose slag micropowders are made composite waterproofing agent of gypsum B component for 35 parts.
From the above-mentioned composite waterproofing agent of gypsum of making, get A component 50 grams, B component 60 grams, water 650 grams, terra alba 1000 grams are with method moulding, the demoulding of embodiment 1.
Comparative Examples 1
Get terra alba 100 grams, water 650 grams stirred 2 minutes in the JS-195A mortar mixer, and gypsum is evenly, the slurry of good fluidity, injects three gang mould tools and the vibratory compaction of 40 * 40 * 160mm, moulding demoulding after 1 hour.
Comparative Examples 2
Get in 150 parts of water that 8 parts in 15 parts in paraffin, polyvinyl alcohol is dissolved in 100 ℃ of temperature, add 0.8 part of HLB value and be 8 compound anion surfactant as the compound anion surfactant of emulsifying agent, 1 part in sodium sulfate, 0.2 part of methylcellulose gum are emulsified into paraffin-polyvinyl alcohol emulsion under the high-speed stirring condition;
Get paraffin-polyvinyl alcohol emulsion 50 grams, water 650 grams, terra alba 1000 grams are with method moulding, the demoulding of embodiment 1.
Comparative Examples 3
Get 7 parts of 320 purpose alum stone flours, 35 parts of uniform mixing of 320 purpose slag micropowders are made the B component in the composite waterproofing agent of gypsum;
Get B component 60 grams, water 650 grams, terra alba 1000 grams are with method moulding, the demoulding of embodiment 1.
Performance test
Each sample after the above-mentioned demoulding is dried by the fire to over dry in 40 ± 2 ℃ of thermostat containers, put into moisture eliminator and be cooled to normal temperature, the over dry sample is carried out performance test.According to GB-9776-88 standard test method the over dry sample is divided into 2 groups, inserting temperature respectively is to soak 2h in 20 ± 0.5 ℃ of water, 24h, and at the water-intake rate of corresponding time build-in test sample, the result is as shown in the table:
| Test piece number (Test pc No.) | Immersion 2h water-intake rate (%) | Immersion 24h water-intake rate (%) |
| Comparative Examples 1 | 38.26 | 45.75 |
| Comparative Examples 2 | 9.21 | 15.25 |
| Comparative Examples 3 | 10.58 | 17.26 |
| Embodiment 1 | 2.53 | 3.10 |
| Embodiment 2 | 2.45 | 3.07 |
| Embodiment 3 | 2.51 | 3.14 |
The result shows in the table, with admixture composite waterproofing agent of gypsum not and compare with the single water-resisting agent of admixture, adopts composite waterproofing agent of gypsum of the present invention having significant improved action aspect the gypsum waterproof.
Claims (4)
1. composite waterproofing agent of gypsum, it is characterized in that: be two kinds of components formations of A, B of 1-5: 2-6 by weight ratio, the A component is paraffin-polyvinyl alcohol emulsion, is made according to the weight ratio high-speed stirring emulsification of 5-40: 2-8: 100-200: 0.25-2 by paraffin, polyvinyl alcohol, water and emulsifying agent; The B component is the inorganic salts water-resisting agent, is mixed by alum stone flour and the slag micropowder weight ratio according to 5-8: 20-40.
2. composite waterproofing agent of gypsum according to claim 1 is characterized in that: also comprise sodium sulfate and methylcellulose gum in the A component, the weight ratio of paraffin, sodium sulfate, methylcellulose gum add-on is 5-40: 1-2: 0.1-0.2.
3. composite waterproofing agent of gypsum according to claim 1 and 2 is characterized in that: described emulsifying agent is a kind of compound anion surfactant, and its HLB value is between 8-9.
4. composite waterproofing agent of gypsum according to claim 1 and 2 is characterized in that: described alum stone flour is levigated 320 order alum stone flours, and described slag micropowder is levigated 320 a purposes ironmaking tailings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100152501A CN101560076B (en) | 2009-05-15 | 2009-05-15 | Compound water-repellent gypsum additive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100152501A CN101560076B (en) | 2009-05-15 | 2009-05-15 | Compound water-repellent gypsum additive |
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| Publication Number | Publication Date |
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| CN101560076A true CN101560076A (en) | 2009-10-21 |
| CN101560076B CN101560076B (en) | 2012-07-04 |
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| CN2009100152501A Expired - Fee Related CN101560076B (en) | 2009-05-15 | 2009-05-15 | Compound water-repellent gypsum additive |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206056A (en) * | 2011-04-01 | 2011-10-05 | 安徽晋马环保节能科技有限公司 | Preparation method of concrete waterproofer with industrial by-product gysum non-calcining technology |
| CN103466991A (en) * | 2013-09-09 | 2013-12-25 | 张雅晴 | Waterproofing agent for buildings |
| CN104016611A (en) * | 2014-06-30 | 2014-09-03 | 湖南省建筑工程集团总公司 | High-durability concrete waterproofing agent |
| CN105254202A (en) * | 2015-09-24 | 2016-01-20 | 滁州京安工贸有限责任公司 | Chlorine-free concrete and mortar waterproof agent |
| CN105419429A (en) * | 2016-01-14 | 2016-03-23 | 烟台顺隆化工科技有限公司 | Inorganic salt waterproofing agent |
| CN105541250A (en) * | 2015-12-20 | 2016-05-04 | 高大元 | Preparation method of granular sepiolite modified waterproof gypsum board |
| CN107010863A (en) * | 2017-05-31 | 2017-08-04 | 杨小英 | Concrete waterproofer |
| CN107628798A (en) * | 2016-07-19 | 2018-01-26 | 方锋 | Nanometer glue waterproof brick |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050350A (en) * | 2007-04-20 | 2007-10-10 | 济南大学 | Composite waterproofing agent of gypsum |
-
2009
- 2009-05-15 CN CN2009100152501A patent/CN101560076B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206056A (en) * | 2011-04-01 | 2011-10-05 | 安徽晋马环保节能科技有限公司 | Preparation method of concrete waterproofer with industrial by-product gysum non-calcining technology |
| CN102206056B (en) * | 2011-04-01 | 2012-11-07 | 安徽晋马环保节能科技有限公司 | Preparation method of concrete waterproofer with industrial by-product gysum non-calcining technology |
| CN103466991A (en) * | 2013-09-09 | 2013-12-25 | 张雅晴 | Waterproofing agent for buildings |
| CN104016611A (en) * | 2014-06-30 | 2014-09-03 | 湖南省建筑工程集团总公司 | High-durability concrete waterproofing agent |
| CN105254202A (en) * | 2015-09-24 | 2016-01-20 | 滁州京安工贸有限责任公司 | Chlorine-free concrete and mortar waterproof agent |
| CN105541250A (en) * | 2015-12-20 | 2016-05-04 | 高大元 | Preparation method of granular sepiolite modified waterproof gypsum board |
| CN105419429A (en) * | 2016-01-14 | 2016-03-23 | 烟台顺隆化工科技有限公司 | Inorganic salt waterproofing agent |
| CN107628798A (en) * | 2016-07-19 | 2018-01-26 | 方锋 | Nanometer glue waterproof brick |
| CN107010863A (en) * | 2017-05-31 | 2017-08-04 | 杨小英 | Concrete waterproofer |
| CN107010863B (en) * | 2017-05-31 | 2019-03-12 | 广东禧和新材料科技有限公司 | Concrete waterproofer |
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| Publication number | Publication date |
|---|---|
| CN101560076B (en) | 2012-07-04 |
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Granted publication date: 20120704 Termination date: 20130515 |