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Phosphogypsum-base self-leveling material and preparation method thereof

A gypsum-based, self-leveling technology, applied in the field of building materials, can solve unseen problems, and achieve the effects of reducing production costs, improving early strength, and improving setting time.

Active Publication Date: 2015-06-10
山东新大地环保建材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of gypsum whiskers to improve self-leveling materials on gypsum-based floors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a phosphogypsum-based self-leveling material. The raw material components are calculated by weight percentage: β gypsum powder: 15%; high-strength gypsum powder: 28%; fine river sand: 35.65%; phosphogypsum whiskers: 12% ; Granulated blast furnace slag powder: 3%; Sulphoaluminate cement: 6%; SC retarder: 0.2%; Methyl cellulose ether: 0.05%; Polycarboxylate water reducer: 0.1%.

[0025] Wherein: the quality of described β gypsum is: fineness is 0.074mm square hole sieve remaining 1%, initial setting time is 6min, final setting time is 10min, absolute dry compressive strength is 11MPa, absolute dry flexural strength is 4.6MPa: The high-strength gypsum powder is produced through atmospheric pressure hydrothermal reaction, and its strength level is above 30MPa; the quality of the dihydrate gypsum whiskers is: CaSO 4 2H 2 The O content is greater than 98%, the tensile strength is 21.0GPa, the tensile modulus is 173GPa, the average diameter is 2-4μm, an...

Embodiment 2

[0027] A method for preparing a low-cost phosphogypsum-based self-leveling material. The raw material components are: β gypsum powder: 20%; high-strength gypsum powder: 24%; fine river sand: 36.65%; phosphogypsum whiskers: 10%; granulated blast furnace slag powder: 3%; sulphoaluminate cement: 6%; SC retarder: 0.2%; methyl cellulose ether: 0.05%; polycarboxylate water reducer: 0.1%.

[0028] Wherein: the quality of described β gypsum is: fineness is 0.074mm square hole sieve remaining 1%, initial setting time is 6min, final setting time is 10min, absolute dry compressive strength is 11MPa, absolute dry flexural strength is 4.6MPa: The high-strength gypsum powder is produced through atmospheric pressure hydrothermal reaction, and its strength level is above 30MPa; the quality of the dihydrate gypsum whiskers is: CaSO 4 2H 2 The O content is greater than 98%, the tensile strength is 21.0GPa, the tensile modulus is 173GPa, the average diameter is 2-4μm, and the average length is ...

Embodiment 3

[0030] A method for preparing a low-cost phosphogypsum-based self-leveling material. The raw material components are calculated by weight percentage: β gypsum powder: 20%; high-strength gypsum powder: 26%; fine river sand: 36.65%; gypsum whiskers: 8 %; granulated blast furnace slag powder: 3%; sulphoaluminate cement: 6%; SC retarder: 0.2%; methyl cellulose ether: 0.05%; polycarboxylate water reducer: 0.1%.

[0031] Wherein: the quality of described β gypsum is: fineness is 0.074mm square hole sieve remaining 1%, initial setting time is 6min, final setting time is 10min, absolute dry compressive strength is 11MPa, absolute dry flexural strength is 4.6MPa: The high-strength gypsum powder is produced through atmospheric pressure hydrothermal reaction, and its strength level is above 30MPa; the quality of the dihydrate gypsum whiskers is: CaSO 4 2H 2The O content is greater than 98%, the tensile strength is 21.0GPa, the tensile modulus is 173GPa, the average diameter is 2-4μm, an...

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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 [0001] The invention belongs to the field of building materials, and in particular relates to a phosphogypsum-based self-leveling material and a preparation method thereof. Background technique [0002] Phosphogypsum is the most important industrial by-product in the production of phosphorus chemical industry in my country, and it is the precipitate mainly composed of calcium sulfate dihydrate discharged from the production process of phosphate fertilizer enterprises. Every ton of P produced 2 o 5 It is necessary to discharge 4.5 to 5.5 tons of phosphogypsum. For a long time, the utilization of phosphogypsum has become an international technical problem because it contains certain impurities such as phosphorus, fluorine, and organic matter, so stockpiling measures are mainly taken. At present, phosphogypsum can be used in fields such as cement industry, building materials, fertilizer industry and agriculture, but the utilization amount is not large. In 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B14/38C04B14/06
Inventor 马保国李显良苏英郅真真贺行洋金子豪卢文达
Owner 山东新大地环保建材股份有限公司
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