CN105330198B - A kind of gypsum material that is applied to has the composition of diminishing function - Google Patents

A kind of gypsum material that is applied to has the composition of diminishing function Download PDF

Info

Publication number
CN105330198B
CN105330198B CN201510833324.8A CN201510833324A CN105330198B CN 105330198 B CN105330198 B CN 105330198B CN 201510833324 A CN201510833324 A CN 201510833324A CN 105330198 B CN105330198 B CN 105330198B
Authority
CN
China
Prior art keywords
gypsum
water
composition
diminishing function
reducer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201510833324.8A
Other languages
Chinese (zh)
Other versions
CN105330198A (en
Inventor
蔡剑育
洪永顺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Longhu Sci&tech Co Ltd
Original Assignee
Guangdong Longhu Sci&tech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Longhu Sci&tech Co Ltd filed Critical Guangdong Longhu Sci&tech Co Ltd
Priority to CN201510833324.8A priority Critical patent/CN105330198B/en
Publication of CN105330198A publication Critical patent/CN105330198A/en
Application granted granted Critical
Publication of CN105330198B publication Critical patent/CN105330198B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a kind of composition that can be greatly improved water-reducing rate and have diminishing function suitable for gypsum material, said composition is by being obtained by evenly mixing for 10 15% water reducer, 20 30% calcium hydroxide, 1 4% cellulose ether, 15 20% calcium sulphate dihydrate, 2 5% defoamer, 26 52% metakaolins including percentage by weight;Water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, and calcium hydroxide is the coccoid that fineness is more than 325 mesh, and the viscosity of cellulose ether is 300 500mPa.s.The present invention's has diminishing function composition, the hydroxide ion produced using the calcium hydroxide of particular fineness in water can promote the decomposition of high-efficiency water-reducing agent of poly-carboxylic acid to disperse, so that polycarboxylate water-reducer has given play to bigger effect in gypsum material, in the case of polycarboxylate water-reducer addition identical, water-reducing rate can be greatly improved, coordinate other specific components again, make the characteristics of composition has without slow setting, without bleed and without bleeding, in the case of identical amount of water, the intensity and water resistance of gypsum material can be made all to be improved.

Description

A kind of gypsum material that is applied to has the composition of diminishing function
Technical field
The present invention relates to a kind of composition, more particularly to a kind of composition using polycarboxylate water-reducer as main component, more It is specifically related to a kind of composition with diminishing function that can be greatly improved water-reducing rate and be applied to gypsum material.
Background technology
Gypsum as a kind of binder materials, due to light weight, sound insulation, heat-insulated, fire resisting, it is affine to human body the features such as, more More to receive an acclaim;With advances in technology, from traditional Thistle board, gypsum block, plaster decoration line, smeared to gypsum Lime and brick, gypsum adhesive mortar, gypsum caulking agent, then to gypsum self-leveling, gypsum grouting material etc., the application in architectural engineering Scope is more and more extensive.But, relative to cement, the resistance to compression of plastering, rupture strength are still than relatively low, this water from gypsum It is 18.61% to change reaction to can be seen that the theoretical water paste ratio of semi-hydrated gypsum, and in order to ensure the operability of gypsum, plastering Actual used water amount is even more than 70% in production, and how increased moisture can ensure the mobility of gypsum slurry, but in plastering Product internal voids can be caused to increase after drying, intensity is greatly lowered.In order to allow gypsum product to reach enough intensity, generally Way be the greater proportion of gypsum of admixture and the amount of water in plastering production process reduced by adding water reducer, by The increase of production cost can be caused in filling greater proportion of gypsum, therefore gypsum is improved by adding suitable water reducer to produce The intensity of product is just highly desirable to.
Start gypsum self-leveling and gypsum grouting material of appearance etc. in recent years, due to the requirement of product construction characteristic itself, need Obtain extraordinary fluidity, then the requirement to water reducer is just higher.Water-reducing rate is that the limit for testing a water reducer is made With, such as the water reducer that one water-reducing rate is 20%, no matter its addition is how many, can not all obtain 30% water reducer rate, and The water reducer that one water-reducing rate is 40%, even if its addition very little, also easily reaches 30% water-reducing rate;Common naphthalene system and Water-reducing rate of the sulfonated melamine based water reducer in gypsum is generally lower than 20%, thus is difficult the requirement for meeting this kind of product. Although water-reducing effect of the polycarboxylate water-reducer in cement material is very good, water-reducing rate can reach 45%, in gypsum system Water-reducing rate is typically smaller than 30%, while polycarboxylic acids diminishing is due to the side effect with slow setting and bleed, also limit it in gypsum material Use in material, because slow setting can cause production efficiency slack-off, and bleed can cause gypsum compactness to diminish, and intensity is deteriorated;Separately Outside, while gypsum material in the presence of water reducer obtains high fluidity, gypsum material also easily produces excreting water phenomenon.
The content of the invention
The problem of to exist more than solving, it is an object of the invention to provide a kind of water-reducing rate height, without slow setting, without bleed, nothing Bleeding, it is adaptable to the composition with diminishing function of gypsum material.
To realize object above, the gypsum material that is applied to of the invention has the composition of diminishing function, is by including weight Measure percentage for 10-15% water reducer, 20-30% calcium hydroxide, 1-4% cellulose ether, 15-20% calcium sulphate dihydrate, 2-5% defoamer, 26-52% metakaolins is obtained by evenly mixing;Water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, and calcium hydroxide is Fineness is more than the coccoid of 325 mesh, and the viscosity of cellulose ether is 300-500mPa.s.
Because the polycarboxylate water-reducer water-reducing rate after promotion can reach more than 40%, too high water-reducing rate, easily Gypsum material is caused excreting water phenomenon occur, particularly in the gypsum material of high flowable state, it is easier to bleeding occur, the present invention is ground Study carefully discovery, the methyl hydroxyethylcellulose ether for adding low viscosity can be with highly effective suppression gypsum bleeding.
Because high-efficiency water-reducing agent of poly-carboxylic acid has certain deferred action to gypsum, gypsum material setting time can be caused to become Long, present invention research is found, the calcium sulphate dihydrate of incorporation can play nucleation, promotes the condensation hardening of gypsum, while can also Promote new dihydrate gypsum nucleus to produce, help to generate very tiny dihydrate gypsum acicular crystal, this is conducive to crystallizing into The growth of intensity in growth process, and the less calcium sulphate dihydrate of particle diameter is conducive to the scattered of component, above-mentioned calcium sulphate dihydrate is preferred Fineness is more than the coccoid of 325 mesh.
Because the high-efficiency water-reducing agent of poly-carboxylic acid and cellulose ether of addition have certain air-entraining effect, in order to reduce bubble pair The influence of gypsum material, adding defoamer plays the role of to suppress bubble formation and eliminates bubble, and reduction bubble is to gypsum intensity Influence, the above-mentioned preferred mineral oils of defoamer or plant oil defoamer.
For the ease of scattered, while improve the activity of metakaolin, the above-mentioned preferred fineness of metakaolin is more than 325 mesh, strong Spend the powder that activity index is more than 120%.
In order that water reducer composition each component evenly can be scattered in gypsum material in use, so as to improve Using effect, the above-mentioned composition each component with diminishing function is mixed in powder stirrer.
Addition preferred 0.2-2% of the above-mentioned composition with diminishing function in gypsum material.
The gypsum material that is applied to of the present invention has the composition of diminishing function, compared with existing water reducer, with as follows Advantage:
1st, the present invention utilizes the hydrogen-oxygen of particular fineness using appropriate calcium hydroxide is added in high-efficiency water-reducing agent of poly-carboxylic acid The hydroxide ion that change calcium is produced in water can promote the decomposition of high-efficiency water-reducing agent of poly-carboxylic acid to disperse, so that polycarboxylate water-reducer Bigger effect has been given play in gypsum material, in the case of polycarboxylate water-reducer addition identical, can greatly improve and subtract Water rate, water-reducing rate maximum can bring up to more than 40%.
2nd, by adding low viscosity cellulose ether, can effectively it suppress because too high water-reducing rate is easily caused gypsum material Expect the excreting water phenomenon occurred.
3rd, by adding appropriate calcium sulphate dihydrate, deferred action of the high-efficiency water-reducing agent of poly-carboxylic acid to gypsum can have both been offset, Be conducive to the growth of intensity in gypsum crystallization developmental process again.
4th, by adding a small amount of defoamer, can effectively it suppress due to high-efficiency water-reducing agent of poly-carboxylic acid and cellulose ether presence The air-entraining effect of generation, influence of the reduction bubble to gypsum intensity.
5th, by adding appropriate metakaolin, gypsum aquation later stage unnecessary calcium hydroxide reaction can not only be fallen, The alkalescence of reduction system, while the product that higher territory and calcium hydroxide, gypsum, water react can improve gypsum by a small margin Intensity.
6th, of the invention to have diminishing function composition, by the synergy of each component, water-reducing rate is high, without slow setting, nothing Bleed, without bleeding, in the case of identical amount of water, the intensity and water resistance of gypsum material are all improved.
Embodiment
Here is the specific embodiment of the present invention, and these embodiments are simply applied to gypsum material to the present invention has diminishing The composition of function is described in detail, and is not used to limit the scope of the invention.
Following examples have the selection of the composition each component material of diminishing function:
The trade mark that water reducer is sold from Guangdong Longhu Technology Shares Co., Ltd. is efficient for HANRIUS P29 polycarboxylic acids Water reducer;Calcium hydroxide is more than the powder of 325 mesh from commercially available fineness;Methyl hydroxyethylcellulose ether selects DOW companies of the U.S. The trade mark of sale is WALOCEL MT400PFV cellulose ether;Calcium sulphate dihydrate is more than the powder of 325 mesh from commercially available fineness; The defoamer that mineral oils powder defoamer is AGITAN P801 from the trade mark of MZUNING companies of Germany sale;Metakaolin The metakaolin for being METAMAX from the trade mark that BASF Corp. of Germany sells.
1st, the formula of composition(Percentage by weight)
2nd, prepare
Above each component is weighed in proportion, powder stirrer is poured into and is well mixed.
3rd, performance test
(1)According to GB/T 17669.4-1999《Plaster of Paris starches the measure of physical property only》Prescriptive procedure is to the present invention The influence of diminishing function composition and the polycarboxylate water-reducer of market sale to the normal consistency amount of water of gypsum, and calculate diminishing Rate, testing result is as follows:
The gypsum that above-mentioned experiment is used originates from Jiangsu for natural plaster of Paris;Water-reducing rate R by calculating formula R=(W1-W2) * 100%/ W1 is calculated, and wherein W1 represents to reach the amount of water of normal consistency during without additive, and W2 represents to reach mark during addition additive The amount of water of quasi- denseness.
It was found from upper table test result, diminishing function composition of the invention adds polycarboxylate water-reducer compared to independent, In the case of identical addition, water-reducing rate is increased substantially.
(2)According to GB/T 17669.4-1999《Plaster of Paris starches the measure of physical property only》Prescriptive procedure tests this hair The influence of bright diminishing function composition and commercially available polycarboxylate water-reducer to the setting time of gypsum, according to GB/T 17669.4- 1999《Plaster of Paris starches the measure of physical property only》Regulation tests diminishing function composition of the present invention and commercially available polycarboxylic acids diminishing Influence of the agent to gypsum dry density and compression strength, every test result is as follows:
The gypsum that above-mentioned experiment is used originates from Jiangsu, the dry density of gypsum is based on calculating formula ρ=m/V for natural plaster of Paris Calculate, V is the volume for the test specimen dried, and m is the weight for the test specimen dried.
It is very small on the setting time influence of gypsum by upper table results showed that diminishing function composition of the present invention(No Slow setting), and individually adding polycarboxylate water-reducer can cause gypsum setting time to extend, and because deferred action have impact on gypsum crystalline substance The normal growth of body, causes gypsum intensity to decline;Further, since higher territory is reacted with calcium hydroxide and calcium sulfate, generation is strong Degree and the preferable hydrated calcium silicate of water resistance, aquation calcium sulfate or entringite, make admixture have the gypsum of diminishing function composition strong Degree has raising by a small margin.From the point of view of the result of the test of dry density, dry density shadow of the diminishing function composition of the present invention to gypsum Sound is very small, illustrates diminishing function composition without air-entraining effect.
(3)With reference to GB/T 17669.4-1999《Plaster of Paris starches the measure of physical property only》Defined method test is originally The influence of invention diminishing function composition and commercially available polycarboxylate water-reducer to gypsum bleeding, test result is as follows:
Diminishing function composition of the present invention is can be seen that compared to the polycarboxylate water-reducer individually added from upper table result of the test There is anti-bleeding effect well.

Claims (7)

1. a kind of gypsum material that is applied to has the composition of diminishing function, it is characterised in that:The composition is by including weight Measure percentage for 10-15% water reducer, 20-30% calcium hydroxide, 1-4% cellulose ether, 15-20% calcium sulphate dihydrate, 2-5% defoamer, 26-52% metakaolins are blended to be obtained;Water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, and calcium hydroxide is fineness More than the coccoid of 325 mesh, the viscosity of cellulose ether is 300-500mPa.s.
2. the gypsum material according to claim 1 that is applied to has the composition of diminishing function, it is characterised in that:The fibre The plain ether of dimension is methyl hydroxyethylcellulose ether.
3. the gypsum material according to claim 1 or 2 that is applied to has the composition of diminishing function, it is characterised in that:Institute State the coccoid that calcium sulphate dihydrate is more than 325 mesh for fineness.
4. the gypsum material according to claim 3 that is applied to has the composition of diminishing function, it is characterised in that:It is described to disappear Infusion is the mineral oils or plant oil defoamer of powdery.
5. the gypsum material according to claim 4 that is applied to has the composition of diminishing function, it is characterised in that:It is described inclined Kaolin is that fineness is more than the powder that 325 mesh, strength activity index are more than 120%.
6. the gypsum material according to claim 5 that is applied to has the composition of diminishing function, it is characterised in that:The tool The composition each component for having diminishing function is mixed in powder stirrer.
7. the gypsum material according to claim 6 that is applied to has the composition of diminishing function, it is characterised in that:The tool It is 0.2-2% to have addition of the composition of diminishing function in gypsum material.
CN201510833324.8A 2015-11-26 2015-11-26 A kind of gypsum material that is applied to has the composition of diminishing function Active CN105330198B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510833324.8A CN105330198B (en) 2015-11-26 2015-11-26 A kind of gypsum material that is applied to has the composition of diminishing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510833324.8A CN105330198B (en) 2015-11-26 2015-11-26 A kind of gypsum material that is applied to has the composition of diminishing function

Publications (2)

Publication Number Publication Date
CN105330198A CN105330198A (en) 2016-02-17
CN105330198B true CN105330198B (en) 2017-10-31

Family

ID=55281000

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510833324.8A Active CN105330198B (en) 2015-11-26 2015-11-26 A kind of gypsum material that is applied to has the composition of diminishing function

Country Status (1)

Country Link
CN (1) CN105330198B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109608078B (en) * 2019-01-24 2021-07-23 长江师范学院 Semi-hydrated building gypsum coagulant, and preparation method and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101759422A (en) * 2010-01-21 2010-06-30 同济大学 Desulfurized gypsum base polyphenyl particle heat insulation mortar
CN102020452A (en) * 2010-09-30 2011-04-20 安徽晋马环保节能科技有限公司 Bonding rendering coat mortar for thermal insulation of internal and external walls prepared by desulfurization gypsum calcining-free process and preparation method thereof
CN103011673A (en) * 2012-12-17 2013-04-03 上海三瑞高分子材料有限公司 Gypsum additive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101759422A (en) * 2010-01-21 2010-06-30 同济大学 Desulfurized gypsum base polyphenyl particle heat insulation mortar
CN102020452A (en) * 2010-09-30 2011-04-20 安徽晋马环保节能科技有限公司 Bonding rendering coat mortar for thermal insulation of internal and external walls prepared by desulfurization gypsum calcining-free process and preparation method thereof
CN103011673A (en) * 2012-12-17 2013-04-03 上海三瑞高分子材料有限公司 Gypsum additive

Also Published As

Publication number Publication date
CN105330198A (en) 2016-02-17

Similar Documents

Publication Publication Date Title
CN103553418B (en) A kind of premixing mortar water-retention thixotropic agent and preparation method thereof
EP1485330B1 (en) High strength flooring compositions
CN103043974B (en) High-wear-resistant cement-based self-leveling mortar and preparation method thereof
CN103496934B (en) A kind of phosphogypsum foundation base brushing gypsum material and preparation method thereof
CN104788072A (en) Early-strength type aluminate cement based self-leveling material
KR100403831B1 (en) Crack retardant mixture made from flyash and its application to concrete
CN104628349B (en) A kind of ardealite base upper flow regime grouting material
CN101337784A (en) Building mortar and method for preparing same
JP6487441B2 (en) Reinforced mortar and coating binder composition
US20090101045A1 (en) Gypsum mixtures for forming solids
EP2524960A2 (en) Admixture composition for a tile cement mortar and a tile cement mortar composition comprising the same
CN107954669A (en) A kind of grouting material and preparation method thereof
CN104761171A (en) Liquid accelerator and preparation method thereof
WO2014089815A1 (en) Composition of cellulose ether and gluconate salts for use in cement containing skim coats
CN104261773A (en) Water-resistant cement-based self-leveling material
CN105330198B (en) A kind of gypsum material that is applied to has the composition of diminishing function
US6790277B2 (en) Lightweight joint treatment formulation
CN103553450B (en) A kind of lightweight self-compacting concrete and preparation method thereof
CN104045286A (en) Cement-based capillary crystalline waterproof material
CN109206108A (en) A kind of scratch coat gypsum and preparation method thereof
CN103979827A (en) Manganese residue-based concrete admixture function regulator and preparation method thereof
CN102199028B (en) Rapid hardening early strength grouting material prepared with flue gas desulfurized gypsum and preparation method thereof
CN104058707B (en) A kind of resistance to water gypsum base body of wall material for repairing
JP2012140274A (en) Strength-increasing agent for polymer cement composition, and high-strength polymer cement composition
CN103043982B (en) Powder special for mechanized construction plastering mortar

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: Composition with water reduction function suitable for gypsum materials

Effective date of registration: 20190930

Granted publication date: 20171031

Pledgee: Shantou SME financing Company limited by guarantee

Pledgor: Guangdong Longhu Sci.&Tech. Company Limited

Registration number: Y2019990000306

Denomination of invention: Composition with water reduction function suitable for gypsum materials

Effective date of registration: 20190930

Granted publication date: 20171031

Pledgee: Shantou SME financing Company limited by guarantee

Pledgor: Guangdong Longhu Sci.&Tech. Company Limited

Registration number: Y2019990000306

PC01 Cancellation of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20201123

Granted publication date: 20171031

Pledgee: Shantou SME financing Company limited by guarantee

Pledgor: GUANGDONG LONGHU SCI. & TECH. Co.,Ltd.

Registration number: Y2019990000306