Phosphogypsum lightweight concrete and preparation method thereof

A light-weight concrete and phosphogypsum technology, which is applied in the field of comprehensive utilization of phosphogypsum, can solve the problems of weakening the bonding force between gypsum grains, reducing strength, and complex processes, etc., and achieve low macroscopic strength, suppressing alternating changes in cold and heat, and enhancing The effect of durability and mechanical properties

Inactive Publication Date: 2019-07-02
四川铁科新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The modification of existing phosphogypsum mainly uses high-pressure cooking and high-temperature calcination to obtain modified gypsum powder with high strength. The additives added are relatively high, and certain temperature treatment is required. The process is complicated and the cost is high; the hygroscopicity of traditional gypsum products Strong resistance, the absorbed water will weaken the bonding force between gypsum grains and significantly reduce the strength; if soaked in water for a long time, it will also be damaged due to the gradual dissolution of dihydrate gypsum crystals

Method used

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  • Phosphogypsum lightweight concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weighing, dry mixing, weighing 300 parts of phosphogypsum, 400 parts of cement, 100 parts of admixture, 5 parts of quicklime, 2 parts of inorganic mineral additives, 2 parts of admixture, dry mixing in a mixer for 20-30s, Make the material evenly dispersed;

[0023] (2) Add water and admixture to stir, add 900 parts of water, add the admixture to the powder after being diluted with water, stir slowly for 1 minute, stir quickly for 2 minutes, and let stand;

[0024] (3) The foaming agent is diluted and foamed, and the foaming agent is diluted with 60 times of water, added to the prepared slurry, and stirred rapidly for 1 min;

[0025] (4) Injection molding, the mixed foam concrete is quickly injected into the mold for molding.

Embodiment 2

[0027] (1) Weighing, dry mixing, weighing 300 parts of phosphogypsum, 300 parts of cement, 80 parts of admixture, 5 parts of quicklime, 3 parts of inorganic mineral additives, 2 parts of admixture, dry mixing in a mixer for 20-30s, Make the material evenly dispersed;

[0028] (2) Add water and admixture to stir, add 850 parts of water, add the admixture to the powder after being diluted with water, stir slowly for 1 minute, stir quickly for 2 minutes, and let stand;

[0029] (3) The foaming agent is diluted and foamed, and the foaming agent is diluted with 60 times of water, added to the prepared slurry, and stirred rapidly for 1 min;

[0030] (4) Injection molding, the mixed foam concrete is quickly injected into the mold for molding.

Embodiment 3

[0032] (1) Weighing and dry mixing, weigh 350 parts of phosphogypsum, 300 parts of cement, 90 parts of admixtures, 6 parts of quicklime, 2.5 parts of inorganic mineral additives, 2.1 parts of admixtures, and dry mix them in a mixer for 30 seconds to make the materials Evenly dispersed;

[0033] (2) Add water and admixture to stir, add 840 parts of water, add the admixture to the powder after being diluted with water, stir slowly for 1 minute, stir quickly for 2 minutes, and let stand;

[0034] (3) The foaming agent is diluted and foamed, and the foaming agent is diluted with 60 times of water, added to the prepared slurry, and stirred rapidly for 1 min;

[0035] (4) Injection molding, the mixed foam concrete is quickly injected into the mold for molding.

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Abstract

The invention discloses phosphogypsum lightweight concrete that comprises the following raw materials by weight: 200-500 parts of phosphogypsum, 300-650 parts of cement, 30-150 parts of an admixture,1-5 parts of a foaming agent, 2-20 parts of quick lime, 1-5 parts of an inorganic mineral additive, 1-3 parts of an additive and 400-750 parts of water. The concrete can effectively utilize phosphogypsum, enhances durability and mechanical properties, and is light in weight, high in strength and low in manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of phosphogypsum, in particular to a phosphogypsum lightweight concrete and a preparation method thereof. Background technique [0002] Phosphogypsum is a solid waste discharged during the production of phosphoric acid or phosphate fertilizer. my country is the world's largest producer of phosphate fertilizers. With the rapid development of the phosphate fertilizer industry, the discharge of phosphogypsum is increasing year by year. So far, the stockpile of phosphogypsum in my country has exceeded 300 million tons. If phosphogypsum is discharged arbitrarily, it will not only pollute the environment and occupy land, but also enterprises will invest a lot of construction funds and operation management costs of slag yards. [0003] At present, the utilization status of phosphogypsum at home and abroad is that it can be used as cement retarder, plaster plaster, plasterboard, hollow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/40
CPCC04B28/147C04B2111/00017C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B7/00C04B22/064C04B18/08C04B18/141C04B14/14C04B24/16C04B24/42C04B24/166C04B24/383C04B24/00C04B14/328C04B14/043C04B14/02C04B14/304C04B14/106C04B2103/0068C04B2103/12C04B2103/22C04B2103/48
Inventor 苏笮斌龙建仲一夫李胜龙蒋伟
Owner 四川铁科新型建材有限公司
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