Phosphogypsum-based fabricated exterior wallboard and preparation method thereof

A technology for phosphogypsum and exterior wall boards, which is applied in the field of building wall materials, can solve the problems of low strength, limited application, and high water absorption, and achieves the effects of low water absorption, reduced building weight, and simple production.

Pending Publication Date: 2019-11-26
GUIZHOU LANTU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercially available phosphogypsum wall materials are mainly slats and blocks, and slats and blocks are low in strength (flexural strength ≤ 5MPa, compressive strength ≤ 10MPa), high water absorption (24-hour water absorption 30 %~40%), so it can only be used in indoor environment, which greatly limits its application

Method used

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  • Phosphogypsum-based fabricated exterior wallboard and preparation method thereof
  • Phosphogypsum-based fabricated exterior wallboard and preparation method thereof
  • Phosphogypsum-based fabricated exterior wallboard and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The phosphogypsum-based fabricated exterior wallboard provided in this embodiment includes phosphogypsum components, sand components, cement components, water reducing agent components, retarder components, waterproofing agent components, defoamer components and fiber component; here, the water reducing agent component uses polycarboxylate water reducing agent, the retarder component adopts protein gypsum retarder, and the waterproofing agent component adopts silicone waterproofing agent, such as silicone oil waterproofing agent; The foaming agent component adopts silicone defoamer; the fiber component adopts alkali-resistant glass fiber with a length of 2-5 cm. The weight percent of each component is:

[0017]

[0018] Weigh the required phosphogypsum component, sand component, cement component, water reducer component, retarder component and waterproofing agent component according to the weight percentage of the above-mentioned components and mix them to obtain the...

Embodiment 2

[0021] The phosphogypsum-based fabricated exterior wallboard provided in this embodiment includes phosphogypsum components, sand components, cement components, water reducing agent components, retarder components, waterproofing agent components, defoamer components and fiber component; here, the water reducing agent component uses polycarboxylate water reducing agent, the retarder component adopts protein gypsum retarder, and the waterproofing agent component adopts silicone waterproofing agent, such as silicone oil waterproofing agent; The foaming agent component adopts silicone defoamer; the fiber component adopts alkali-resistant glass fiber with a length of 2-5 cm. The weight percent of each component is:

[0022]

[0023] Weigh the required phosphogypsum components, sand components, cement components, water reducer components, retarder components, waterproofing agent components, defoamer components and fibers according to the weight percentage of the above components ...

Embodiment 3

[0026] The phosphogypsum-based fabricated exterior wallboard provided in this embodiment includes phosphogypsum components, sand components, cement components, water reducing agent components, retarder components, waterproofing agent components, defoamer components and fiber component; here, the water reducing agent component uses polycarboxylate water reducing agent, the retarder component adopts protein gypsum retarder, and the waterproofing agent component adopts silicone waterproofing agent, such as silicone oil waterproofing agent; The foaming agent component adopts silicone defoamer; the fiber component adopts alkali-resistant glass fiber with a length of 2-5 cm. The weight percent of each component is:

[0027]

[0028] Weigh the required phosphogypsum components, sand components, cement components, water reducing agent components, retarder components, waterproofing agent components, defoaming agent components, fiber Mix the components to obtain mixed ash. The water...

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Abstract

The invention discloses a phosphogypsum-based fabricated exterior wallboard and a preparation method thereof. The exterior wallboard comprises a phosphogypsum component, a sand component, a cement component, a water reducer component, a retarder component, a waterproof agent component, a defoamer component and a fiber component. The phosphogypsum exterior wallboard has an apparent density of below1600kg/m<3>, a breaking strength of 9 MPa or above, a compressive strength of 20 MPa or above, a 24 h soaking water absorption rate of 5% or below and a softening coefficient of above 0.9. The exterior wallboard has the advantages of simplicity in production, no special production device, high strength, low water absorption rate, and meeting of related standards of building materials; and the preparation method has the advantages of simplicity, easiness in implementation, wide source and low price of materials, comprehensive utilization of phosphogypsum, reduction of the weight of buildings,obvious improvement of the quality and the comfort effect of the buildings, and promotion of the comprehensive utilization of the phosphogypsum to exterior walls, and meets the related technical standards of buildings.

Description

technical field [0001] The invention belongs to the field of building wall materials, and in particular relates to a phosphogypsum-based assembled exterior wall panel and a preparation method thereof. Background technique [0002] Phosphogypsum is a solid waste produced in the production process of wet-process phosphoric acid. The domestic annual discharge of phosphogypsum is close to 50 million tons. Phosphogypsum contains a small amount of undecomposed free phosphoric acid, fluoride and other substances that are harmful to the environment. At present, Most of the treatment methods for phosphogypsum are stacked in the open air and poured into the sea, which will obviously cause serious pollution to the soil, water system and atmosphere, and require a large amount of land resources, resulting in waste of land resources. Therefore, effective and timely treatment of phosphogypsum It is of great significance to realize the virtuous cycle of phosphogypsum discharge and utilizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/143C04B2201/20C04B2201/50C04B7/00C04B14/06C04B2103/302C04B24/14C04B24/42C04B14/42
Inventor 李军陈小平付伯平刘永杨再祥何金泉石吉鑫雷勇
Owner GUIZHOU LANTU NEW MATERIALS
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