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Phosphorus II type anhydrous gypsum-based self-leveling mortar

A self-leveling mortar and anhydrous gypsum technology, which is applied in the field of building materials, can solve the problem of poor compatibility between water-reducing agents and activators, self-leveling mortar workability and strength indicators are difficult to meet standard requirements, and water-reducing agents rate reduction etc.

Inactive Publication Date: 2021-12-10
重庆杰博思石膏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility between the existing water reducing agent and the activator is not good, resulting in a significant reduction in the water reducing rate of the water reducing agent, making it difficult for the workability and strength indicators of the self-leveling mortar to meet the standard requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Phosphorus II type anhydrite, the preparation steps are as follows:

[0026] Dry the phosphogypsum raw material at 45°C until the moisture content is less than or equal to 5%, and then calcinate at 800±50°C for 2 hours at a medium temperature. After firing, cool it to room temperature through the air flow outside the furnace, and grind it to a specific surface area of ​​400±20m 2 / kg powder, aged for 3 days.

Embodiment 2

[0028] Self-leveling mortar, its raw material composition is as follows:

[0029] 30-45kg of tap water, 3kg of P.O42.5 grade ordinary Portland cement, 12 parts of slag (S95 grade, specific surface area ≥ 400m2 / kg), 1.5 parts of activator, phosphorus II type anhydrite obtained in Example 1 100kg, sulfonated melamine-based water reducing agent 0.3kg, machine-made sand (fineness modulus 1.6-2.2) 15kg, stone powder (fineness 300-320 mesh) 5kg, rubber particles (particle size 200μm-300μm) 5kg, Silane coupling agent KH-5500.2kg, hydroxypropyl methylcellulose ether (particle size <150μm) 0.5kg, polyvinyl alcohol latex powder 0.2kg and water-soluble mineral oil defoamer 0.5kg.

[0030] Wherein, the activator is composed of: 0.6 kg of industrial pure potassium sulfate and 0.9 kg of industrial pure aluminum sulfate.

[0031] The preparation process of the self-leveling mortar is as follows: uniformly mixing the above raw materials.

Embodiment 3

[0033] Self-leveling mortar, its raw material composition is as follows:

[0034] 30kg of tap water, 3kg of P.O42.5 grade ordinary Portland cement, slag (S95 grade, specific surface area ≥ 400m2) 2 / kg) 9kg, activator 1.3kg, phosphorus II type anhydrite 100kg that embodiment 1 makes, sulfonated tripolyhydrogen amine series water reducer 0.1-0.5kg, rubber particle (particle diameter is 200μm-300μm) 4kg, silane Joint agent KH-5500.3kg, hydroxypropyl methylcellulose ether (particle size <150μm) 0.2kg, polyvinyl alcohol latex powder 0.3kg and water-soluble mineral oil defoamer 0.4kg;

[0035] Wherein, the activator is composed of: 0.7 kg of industrial pure potassium sulfate and 0.6 kg of industrial pure aluminum sulfate.

[0036] The preparation process of the self-leveling mortar is as follows: uniformly mixing the above raw materials.

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to phosphorus II type anhydrous gypsum-based self-leveling mortar. The self-leveling mortar comprises water, cement, slag, an activating agent, phosphorus II type anhydrite and a water reducing agent, wherein the water reducing agent is a sulfonated melamine water reducing agent. The invention solves the technical problem that the compatibility of the existing water reducing agent and activating agent is poor when the phosphorus II type anhydrite is used for the self-leveling mortar.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a phosphorus II type anhydrite-based self-leveling mortar. Background technique [0002] Phosphogypsum is a by-product of phosphoric acid and phosphate fertilizer production, the main chemical component of which is calcium sulfate, and its emission is as high as 280Mt / year (Zhao Anting, Zhu Ling, Gao Xiang, Zhao Chaoping. Research status of phosphogypsum, Chinese Ancient Chemical Society, 2010; Li Mei, Peng Jiahui, Zhang Jianxin, Du Yong. A review of the application status of phosphogypsum in the field of building materials, Proceedings of the Fourth National Gypsum Production and Application Technology Exchange Conference, 2009:95-106). [0003] At present, the use of phosphogypsum to produce building materials is an important research direction for the recycling and reuse of phosphogypsum resources (Zhao Anting, Zhu Ling, Gao Xiang, Zhao Chaoping. Research status of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/16C04B11/26
CPCC04B28/165C04B11/26C04B7/14C04B7/02C04B2103/302C04B14/06C04B14/02C04B18/22C04B24/42C04B24/383C04B24/2623C04B2103/50C04B22/147C04B22/148
Inventor 彭家惠朱聪赵敏刘先锋易伟范璞玥
Owner 重庆杰博思石膏有限公司
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