CN104692755A - Phosphogypsum-base self-leveling material and preparation method thereof - Google Patents
Phosphogypsum-base self-leveling material and preparation method thereof Download PDFInfo
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- CN104692755A CN104692755A CN201510054945.6A CN201510054945A CN104692755A CN 104692755 A CN104692755 A CN 104692755A CN 201510054945 A CN201510054945 A CN 201510054945A CN 104692755 A CN104692755 A CN 104692755A
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- 239000000463 material Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000010440 gypsum Substances 0.000 claims abstract description 44
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 44
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims description 16
- 239000011574 phosphorus Substances 0.000 claims description 16
- 150000002148 esters Chemical group 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- -1 phosphogypsum dihydrate Chemical class 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 150000007974 melamines Chemical class 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 229940095064 tartrate Drugs 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002440 industrial waste Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 7
- 150000004683 dihydrates Chemical class 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000011507 gypsum plaster Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a phosphogypsum-base self-leveling material and a preparation method thereof. The phosphogypsum-base self-leveling material is composed of the following raw materials in percentage by weight: 10-20% of beta-gypsum powder, 20-30% of high-strength gypsum powder, 30-40% of aggregate, 5-15% of phosphogypsum crystal whisker, 2-4% of ore powder, 3-8% of cement, 0.1-0.3% of retarder, 0.05-0.10% of water retention agent and 0.1-0.5% of water reducing agent. Compared with the existing gypsum-base self-leveling material, the phosphogypsum-base self-leveling material utilizes abundant industrial waste phosphogypsum. Compared with the existing phosphogypsum-base self-leveling material, the product provided by the invention has the advantages of high quality, higher folding strength and lower production cost.
Description
Technical field
The invention belongs to building material field, particularly relate to a kind of phosphogypsum based self-leveling material and preparation method thereof.
Background technology
Phosphogypsum is topmost industry byproduct during China phosphorous chemical industry is produced, and what be that phosphatic fertilizer company discharges in process of production take terra alba as the throw out of main component.Often produce one ton of P
2o
54.5 ~ 5.5 tons of phosphogypsums will be discharged.Phosphogypsum is because making its Utilizing question become an international technology difficult problem, so mainly take the measure of storing up containing impurity such as certain phosphorus, fluorine, organism for a long time.At present, phosphogypsum can be applicable to the fields such as Cement industry, material of construction, chemical fertilizer industry and agricultural, but utilization is little.Within 2012, China produces 1,300 ten thousand tons, phosphate fertilizer, and phosphogypsum generation nearly 7,000 ten thousand tons, accumulative volume of cargo in storage is more than 300,000,000 tons, and phosphogypsum comprehensive utilization ratio is less than 10%.
Crystal whisker of gypsum refers to the fibrous single crystal of two water, half water or anhydrous calciumsulphate, is a kind of excellent property, cheap new function material.The conventional raw material preparing crystal whisker of gypsum is the plaster of paris, mainly contains hydrothermal method and normal pressure acidization method two kinds.Crystal whisker of gypsum has high tensile strength and Young's modulus, a kind of Industrial materials of high value, in resin, rubber, coating, papermaking, make toughener or functional type filler, also can be used for friction materials, material of construction, sealing material, insulation and fire retardant material etc.
Self-leveling material be a kind of with inorganic coagulation material or organic materials for base-material, the building ground alignment material be dry mixed with admixture and the thin river sand etc. such as superplasticizer.In actual application, by regulation water cement ratio blunge evenly after, after mechanical pumping or artificial construction, under self gravitation effect, form flat surface by slurry, eliminate artificial floating link, speed of application is accelerated greatly.And self-leveling material formed after surface finish good, intensity is also higher.
Self-leveling material comprises inorganic self-leveling material and organic self-leveling material two aspects.Inorganic self-leveling material comprises gypsum base, cement based and mixed base gelling material.At present, gypsum-based self-leveling material has the feature of light weight, and can reduce ground and bear a heavy burden, its investigation and application is more and more extensive.
Domestic have many inorganic self-leveling materials, and mainly folding strength is not high in the place of its deficiency, and production cost is higher.Ester exchange at phosphorus can significantly improve material folding strength, reduces production cost.But do not see at present and adopt crystal whisker of gypsum to improve the report of gypsum base self-leveling material.
Summary of the invention
Technical problem to be solved by this invention proposes a kind of phosphogypsum based self-leveling material and preparation method thereof, main purpose improves the high added value of phosphogypsum utilization, the basis of original gypsum-based self-leveling material promotes the various performances of phosphogypsum based self-leveling material, especially, in folding strength, reduce production cost simultaneously.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme: a kind of phosphogypsum based self-leveling material, and its raw material composition percentage is: β terra alba: 10 ~ 20%; High strength gypsum powder: 20 ~ 30%; Gather materials: 30 ~ 40%; Ester exchange at phosphorus: 5 ~ 15%; Breeze: 2 ~ 4%; Cement 3 ~ 8%; Retardant: 0.1 ~ 0.3%; Water-holding agent: 0.05 ~ 0.10%; Water reducer: 0.1 ~ 0.5%.
By such scheme, it is obtained that described high strength gypsum powder is through the reaction of constant pressure hydro-thermal method, and its strength grade is at more than 30MPa.
By such scheme, described ester exchange at phosphorus is commercially available phosphogypsum dihydrate whisker, requires to be to its quality: CaSO
42H
2o content is greater than 98wt.%, tensile strength 21.0GPa, and tensile modulus is 173GPa, mean diameter 2-4 μm, and mean length is 40-130 μm.
By such scheme, described gathers materials for river sand, and fineness modulus is 2.0 ~ 2.5.
By such scheme, described cement is aluminosulfate cement.
By such scheme, described breeze is GBFS.
By such scheme, described β terra alba is commercially available terra alba, and its quality is: fineness is that 0.074mm square hole sieve tails over 1%, and the presetting period is 6min, and final setting time is 10min, and over dry ultimate compression strength is 11MPa, and over dry folding strength is 4.6MPa.
By such scheme, described retardant is any one in tartrate, citric acid, Citrate trianion or SC retardant, water-holding agent is any one in methyl cellulose ether, Natvosol or carboxymethyl cellulose, and water reducer is any one in polycarboxylate water-reducer or sulfonated melamine.
The preparation method of described phosphogypsum based self-leveling material, it comprises the following steps:
1) according to weight percent by ester exchange at phosphorus 5 ~ 15%, breeze 2 ~ 4%, cement 3 ~ 8%, retardant 0.1 ~ 0.3%, water-holding agent 0.05 ~ 0.10%, water reducer 0.1 ~ 0.5%, be once uniformly mixed;
2) according to weight percent successively by β terra alba 10 ~ 20%, high strength gypsum powder 20 ~ 30%, gathering materials 30 ~ 40% adds step 1) carry out secondary stirring in gained compound and mix;
3) by step 2) raw material that mixes of gained and water in the ratio mix and blend of 1:0.4-0.6, obtained low cost phosphogypsum based self-leveling material.
Ultimate principle of the present invention: β terra alba, high strength gypsum powder and cement are main gelling material is the main source of phosphogypsum based self-leveling material intensity.The major cause that ester exchange at phosphorus is gained in strength is that it combines in phosphogypsum based self-leveling material, forms certain structural network owing to there is certain surface bonding power between gypsum fiber.When phosphorus whisker volume is at 5%-15%, the network integration power between whisker is comparatively large, and while not reducing ultimate compression strength, folding strength obviously strengthens.When ester exchange at phosphorus volume is less than 5%, between whisker, spacing is comparatively large, and the bonding force of generation is too small or do not produce bonding force, and whisker only plays filler, and reinforced effects is not obvious; When ester exchange at phosphorus volume is greater than 15%, too much crystal whisker of gypsum is interconnected, and the dihydrate gypsum crystalline network that semi-hydrated gypsum is formed is destructurized, shows as the resistance to compression of phosphorus based self-leveling material, folding strength can decrease.
Advantage of the present invention is: compared with existing gypsum-based self-leveling material, present invention utilizes a large amount of trade waste phosphogypsums; Compared with phosphogypsum based self-leveling material, quality product of the present invention is better, and especially improve folding strength, production cost also decreases.The phosphogypsum based self-leveling material of preparation can reach the requirement to 30min fluidity loss, presetting period, final setting time, folding strength, ultimate compression strength, shrinking percentage in JC/T1023-2007 " gypsum base gravity flowing levelling mortar " completely.Be specially: by adding α high strength gypsum powder, breeze, product strength improves greatly; Add aluminosulfate cement, improve the early strength of product; Add β plaster of Paris and crystal whisker of gypsum, reduce production cost, improve the folding strength of product; Add retardant, water-holding agent, water reducer etc., improve the time of coagulation of product, cohesive strength, the thick water consumption of mark etc., workability is better.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Embodiment 1:
A preparation method for phosphogypsum based self-leveling material, its feed composition percentage is: β terra alba: 15%; High strength gypsum powder: 28%; Thin river sand: 35.65%; Ester exchange at phosphorus: 12%; GBFS: 3%; Aluminosulfate cement: 6%; SC retardant: 0.2%; Methyl cellulose ether: 0.05%; Polycarboxylic acids dehydragent: 0.1%.
Wherein: the quality of described β gypsum is: fineness is that 0.074mm square hole sieve tails over 1%, presetting period is 6min, final setting time is 10min, over dry ultimate compression strength is 11MPa, over dry folding strength is 4.6MPa: it is obtained that described high strength gypsum powder is through the reaction of constant pressure hydro-thermal method, and its strength grade is at more than 30MPa; The quality of described dihydrate gypsum whisker is: CaSO
42H
2o content is greater than 98%, tensile strength 21.0GPa, and tensile modulus is 173GPa, mean diameter 2-4 μm, and mean length is 40-130 μm.By above-mentioned self-leveling material by water cement ratio be 0.45 add water stir after construction.After testing: the fundamental property of this material is: 24h folding strength is 3.8Mpa, 24h ultimate compression strength is 14.1Mpa, over dry folding strength 9.4Mpa, over dry ultimate compression strength 23.1Mpa, 30min fluidity loss is 2mm, presetting period 81min, final setting time 90min, shrinking percentage is 0.024%, and over dry tensile bond strength is 1.2Mpa.
Embodiment 2:
A preparation method for low cost phosphogypsum based self-leveling material, its feed composition percentage is: β terra alba: 20%; High strength gypsum powder: 24%; Thin river sand: 36.65%; Ester exchange at phosphorus: 10%; GBFS: 3%; Aluminosulfate cement: 6%; SC retardant: 0.2%; Methyl cellulose ether: 0.05%; Polycarboxylic acids dehydragent: 0.1%.
Wherein: the quality of described β gypsum is: fineness is that 0.074mm square hole sieve tails over 1%, presetting period is 6min, final setting time is 10min, over dry ultimate compression strength is 11MPa, over dry folding strength is 4.6MPa: it is obtained that described high strength gypsum powder is through the reaction of constant pressure hydro-thermal method, and its strength grade is at more than 30MPa; The quality of described dihydrate gypsum whisker is: CaSO
42H
2o content is greater than 98%, tensile strength 21.0GPa, and tensile modulus is 173GPa, mean diameter 2-4 μm, and mean length is 40-130 μm.By above-mentioned self-leveling material by water cement ratio be 0.45 add water stir after construction.After testing: the fundamental property of this material is: 24h folding strength is 3.4Mpa, 24h ultimate compression strength is 13.0Mpa, over dry folding strength 8.5Mpa, over dry ultimate compression strength 22.0Mpa, 30min fluidity loss is 2mm, presetting period 81min, final setting time 90min, shrinking percentage is 0.024%, and over dry tensile bond strength is 1.2Mpa.
Embodiment 3:
A preparation method for low cost phosphogypsum based self-leveling material, its feed composition percentage is: β terra alba: 20%; High strength gypsum powder: 26%; Thin river sand: 36.65%; Crystal whisker of gypsum: 8%; GBFS: 3%; Aluminosulfate cement: 6%; SC retardant: 0.2%; Methyl cellulose ether: 0.05%; Polycarboxylic acids dehydragent: 0.1%.
Wherein: the quality of described β gypsum is: fineness is that 0.074mm square hole sieve tails over 1%, presetting period is 6min, final setting time is 10min, over dry ultimate compression strength is 11MPa, over dry folding strength is 4.6MPa: it is obtained that described high strength gypsum powder is through the reaction of constant pressure hydro-thermal method, and its strength grade is at more than 30MPa; The quality of described dihydrate gypsum whisker is: CaSO
42H
2o content is greater than 98%, tensile strength 21.0GPa, and tensile modulus is 173GPa, mean diameter 2-4 μm, and mean length is 40-130 μm.By above-mentioned self-leveling material by water cement ratio be 0.45 add water stir after construction.After testing: the fundamental property of this material is: 24h folding strength is 3.2Mpa, 24h ultimate compression strength is 13.7Mpa, over dry folding strength 8.0Mpa, over dry ultimate compression strength 22.3Mpa, 30min fluidity loss is 2mm, presetting period 81min, final setting time 90min, shrinking percentage is 0.024%, and over dry tensile bond strength is 1.2Mpa.
Embodiment 4:
A preparation method for low cost phosphogypsum based self-leveling material, its feed composition percentage is: β terra alba: 16%; High strength gypsum powder: 30%; Thin river sand: 36.65%; Crystal whisker of gypsum: 8%; GBFS: 3%; Aluminosulfate cement: 6%; SC retardant: 0.2%; Methyl cellulose ether: 0.05%; Polycarboxylic acids dehydragent: 0.1%.
Wherein: the quality of described β gypsum is: fineness is that 0.074mm square hole sieve tails over 1%, presetting period is 6min, final setting time is 10min, over dry ultimate compression strength is 11MPa, over dry folding strength is 4.6MPa: it is obtained that described high strength gypsum powder is through the reaction of constant pressure hydro-thermal method, and its strength grade is at more than 30MPa; The quality of described dihydrate gypsum whisker is: CaSO
42H
2o content is greater than 98%, tensile strength 21.0GPa, and tensile modulus is 173GPa, mean diameter 2-4 μm, and mean length is 40-130 μm.By above-mentioned self-leveling material by water cement ratio be 0.45 add water stir after construction.After testing: the fundamental property of this material is: 24h folding strength is 3.3Mpa, 24h ultimate compression strength is 14.4Mpa, over dry folding strength 8.2Mpa, over dry ultimate compression strength 24.5Mpa, 30min fluidity loss is 2mm, presetting period 81min, final setting time 90min, shrinking percentage is 0.024%, and over dry tensile bond strength is 1.2Mpa.
Claims (10)
1. a phosphogypsum based self-leveling material, its raw material composition percentage is: β terra alba: 10 ~ 20%; High strength gypsum powder: 20 ~ 30%; Gather materials: 30 ~ 40%; Ester exchange at phosphorus: 5 ~ 15%; Breeze: 2 ~ 4%; Cement 3 ~ 8%; Retardant: 0.1 ~ 0.3%; Water-holding agent: 0.05 ~ 0.10%; Water reducer: 0.1 ~ 0.5%.
2. phosphogypsum based self-leveling material according to claim 1, is characterized in that: it is obtained that described high strength gypsum powder is through the reaction of constant pressure hydro-thermal method, and its strength grade is at more than 30MPa.
3. phosphogypsum based self-leveling material according to claim 1, is characterized in that: described ester exchange at phosphorus is commercially available phosphogypsum dihydrate whisker, requires to be to its quality: CaSO
42H
2o content is greater than 98wt.%, tensile strength 21.0GPa, and tensile modulus is 173GPa, mean diameter 2-4 μm, and mean length is 40-130 μm.
4. phosphogypsum based self-leveling material according to claim 1, is characterized in that: described gathers materials for river sand, and fineness modulus is 2.0 ~ 2.5.
5. phosphogypsum based self-leveling material according to claim 1, is characterized in that: described cement is aluminosulfate cement.
6. phosphogypsum based self-leveling material according to claim 1, is characterized in that: described breeze is GBFS.
7. phosphogypsum based self-leveling material according to claim 1, it is characterized in that: described β terra alba is commercially available terra alba, its quality is: fineness is that 0.074mm square hole sieve tails over 1%, presetting period is 6min, final setting time is 10min, over dry ultimate compression strength is 11MPa, and over dry folding strength is 4.6MPa.
8. phosphogypsum based self-leveling material according to claim 1, it is characterized in that: described retardant is any one in tartrate, citric acid, Citrate trianion or SC retardant, water-holding agent is any one in methyl cellulose ether, Natvosol or carboxymethyl cellulose, and water reducer is any one in polycarboxylate water-reducer or sulfonated melamine.
9. the preparation method of phosphogypsum based self-leveling material according to claim 1, it comprises the following steps:
1) according to weight percent by ester exchange at phosphorus 5 ~ 15%, breeze 2 ~ 4%, cement 3 ~ 8%, retardant 0.1 ~ 0.3%, water-holding agent 0.05 ~ 0.10%, water reducer 0.1 ~ 0.5%, be once uniformly mixed;
2) according to weight percent successively by β terra alba 10 ~ 20%, high strength gypsum powder 20 ~ 30%, gathering materials 30 ~ 40% adds step 1) carry out secondary stirring in gained compound and mix;
3) by step 2) raw material that mixes of gained and water in the ratio mix and blend of 1:0.4-0.6, obtained low cost phosphogypsum based self-leveling material.
10. the preparation method of phosphogypsum based self-leveling material according to claim 9, is characterized in that: it is obtained that described high strength gypsum powder is through the reaction of constant pressure hydro-thermal method, and its strength grade is at more than 30MPa; Described ester exchange at phosphorus is commercially available phosphogypsum dihydrate whisker, requires to be to its quality: CaSO
42H
2o content is greater than 98wt.%, tensile strength 21.0GPa, and tensile modulus is 173GPa, mean diameter 2-4 μm, and mean length is 40-130 μm; Described gathers materials for river sand, and fineness modulus is 2.0 ~ 2.5; Described cement is aluminosulfate cement; Described breeze is GBFS; Described β terra alba is commercially available terra alba, and its quality is: fineness is that 0.074mm square hole sieve tails over 1%, and the presetting period is 6min, and final setting time is 10min, and over dry ultimate compression strength is 11MPa, and over dry folding strength is 4.6MPa; Described retardant is any one in tartrate, citric acid, Citrate trianion or SC retardant, water-holding agent is any one in methyl cellulose ether, Natvosol or carboxymethyl cellulose, and water reducer is any one in polycarboxylate water-reducer or sulfonated melamine.
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| CN110981393A (en) * | 2019-12-19 | 2020-04-10 | 苏州国中新材料研究院有限公司 | High-strength gypsum self-leveling mortar |
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| CN106007622B (en) * | 2016-05-24 | 2018-08-24 | 福建建工建材科技开发有限公司 | A kind of half water desulfurized gypsum base surfacing self-leveling floor mortar of β types |
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| CN107117841A (en) * | 2017-05-02 | 2017-09-01 | 武汉理工大学 | A kind of activated fibre matter sulphate aluminium cement mortar reinforcing agent and preparation method thereof |
| CN107892541A (en) * | 2017-12-11 | 2018-04-10 | 石家庄建建设集团有限公司 | A kind of gypsum slurry and its compound method of block for construction strength test |
| CN108117361A (en) * | 2018-01-05 | 2018-06-05 | 成都上筑建材有限公司 | Water-fast ardealite self-leveling material |
| CN110627462A (en) * | 2018-06-22 | 2019-12-31 | 北新集团建材股份有限公司 | Gypsum self-leveling mortar and preparation method thereof |
| CN109133830A (en) * | 2018-09-27 | 2019-01-04 | 佛山齐安建筑科技有限公司 | A kind of preparation method of ardealite based self-leveling material |
| CN109133830B (en) * | 2018-09-27 | 2020-12-04 | 贵州天辰三江建材有限公司 | Preparation method of phosphogypsum-based self-leveling material |
| CN111606655A (en) * | 2019-04-30 | 2020-09-01 | 中建材创新科技研究院有限公司 | Gypsum-based self-leveling floor material and preparation method thereof |
| CN110981393A (en) * | 2019-12-19 | 2020-04-10 | 苏州国中新材料研究院有限公司 | High-strength gypsum self-leveling mortar |
| CN112851287A (en) * | 2021-02-05 | 2021-05-28 | 湖南省富民乐建材科技发展有限公司 | Gypsum-based sand-free self-leveling formula with strong bonding force |
| CN115893969A (en) * | 2022-12-16 | 2023-04-04 | 四川龙蟒新材料有限公司 | High-strength bonding gypsum and preparation method thereof |
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