Waterproof phosphogypsum plastering mortar dry powder

A technology of plastering mortar and phosphogypsum, which is applied in the field of building materials, can solve problems such as limited production, achieve the effects of solving utilization, reducing costs, and promoting a virtuous circle

Active Publication Date: 2013-03-20
重庆钰居环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, hemihydrate gypsum and type II anhydrous gypsum are mostly natural gypsum, and the output is very limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] A water-resistant phosphogypsum plastering mortar dry powder, its composition and mass content are: 290kg of phosphogypsum-based cementitious material, 680kg of sand, 5kg of waterproofing agent, 10kg of retarder, and 15kg of water-retaining agent. Among them, the phosphogypsum-based cementitious material is β hemihydrate gypsum prepared by phosphogypsum calcined at 170°C for 2 hours and aged for 6 days; the sand is ultra-fine sand with a fineness modulus of 1.0; the waterproofing agent is hydrogen-containing silane; the retarder It is sodium tripolyphosphate; the water retaining agent is methyl cellulose ether. When in use, add water directly in an appropriate proportion and stir evenly on site.

example 2

[0020] A water-resistant phosphogypsum plastering mortar dry powder, its composition and mass content are: 240kg of phosphogypsum-based cementitious material, 680kg of sand, 25kg of waterproofing agent, 5kg of retarder, and 50kg of water-retaining agent. Wherein the phosphogypsum-based gelling material is a mixture of β hemihydrate gypsum prepared by calcination of phosphogypsum at 180°C for 3 hours and aging for 5 days and type II anhydrite prepared by phosphogypsum at 350°C in a weight ratio of 4:1; The sand is ultra-fine sand with a fineness modulus of 1.5; the waterproofing agent is a mixture of hydrogen-containing silane and lime calcium powder in a weight ratio of 1:8; the retarder is sodium tripolyphosphate; and the water-retaining agent is bentonite. When in use, add water directly in an appropriate proportion and stir evenly on site.

example 3

[0022] A water-resistant phosphogypsum plastering mortar dry powder, its composition and mass content are: 200kg of phosphogypsum-based cementitious material, 750kg of sand, 20kg of waterproofing agent, 2kg of retarder, and 30kg of water-retaining agent. The phosphogypsum-based cementitious material is a mixture of β hemihydrate gypsum prepared by calcination of phosphogypsum at 190°C for 2 hours and aging for 5 days and type II anhydrite prepared by phosphogypsum at 360°C in a mass ratio of 2:1; The sand is ultra-fine sand with a fineness modulus of 1.3; the waterproofing agent is a mixture of hydrogen-containing silane and white cement in a weight ratio of 1:10; the retarder is sodium tripolyphosphate; the water-retaining agent is methyl cellulose ether and bentonite A mixture of 1:20 by weight. When in use, add water directly in an appropriate proportion and stir evenly on site.

[0023] Using phosphogypsum-based cementitious materials and ultra-fine sand as raw materials,...

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Abstract

The invention discloses waterproof phosphogypsum plastering mortar dry powder. The dry powder comprises the following components in parts by weight: 20-29 parts of phosphogypsum base gelatinization material, 68-77 parts of sand, 0.5-3.0 parts of waterproof agent, 0.2-1.0 part of retarder and 1.5-5.0 parts of water-retaining agent. The phosphogypsum is used for preparing waterproof plastering mortar dry powder, a new technological method is provided for solving the problems of occupation space, environmental risks, potential safety hazards and the like of the industrial waste phosphogypsum, moreover, local resources are used, the utilization of a local material-superfine sand is solved, on the one hand, environmental load is reduced and the positive cycle of the gypsum industry is promoted, and on the other hand, the cost of gypsum plastering mortar is also lowered. In addition, compared with the waterproofness of the conventional gypsum-based material, the waterproofness of the gypsum plastering mortar which can be produced through the phosphogypsum plastering mortar dry powder and has the softening coefficient of 0.86 is obvious.

Description

technical field [0001] The invention relates to a building material, in particular to a water-resistant phosphogypsum plastering mortar dry powder. Background technique [0002] Phosphogypsum is an industrial waste residue discharged from the production of phosphoric acid-based products (such as phosphate fertilizer). Its main component is calcium sulfate dihydrate, and it also contains many harmful impurities such as soluble phosphorus, eutectic phosphorus, fluoride ions, and organic matter. At present, it is mainly used in the production of sulfuric acid and cement, gypsum boards, gypsum blocks, mine filling and road construction materials, soil improvers, etc., but the average utilization rate of phosphogypsum in the world is less than 10%, and the disposal of phosphogypsum faces an important role. Land area, environmental risks, safety hazards and other pressures have always become environmental protection problems for the development of phosphate fertilizers. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 彭家惠张建新李美瞿金东刘先锋白冷
Owner 重庆钰居环保科技有限公司
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