Desulfurized building gypsum water-proof building block

A technology for desulfurization of building gypsum and building blocks, which is applied in the direction of sustainable waste treatment, solid waste management, and climate sustainability. It can solve the problems of multiple components, difficult operation, and high cost, and achieve improved waterproof performance and environmental benefits. Significant, widening effect

Inactive Publication Date: 2011-09-14
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own air-hardness, the softening coefficient of gypsum blocks is generally below 0.5, which greatly limits its wide application in construction engineering walls, and is also a major problem that manufacturers need to solve urgently.
Chinese patent documents...

Method used

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  • Desulfurized building gypsum water-proof building block

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Embodiment 1

[0018] The formula of desulfurization building gypsum waterproof block of the present invention is (mass percentage)

[0019] Desulfurization building gypsum 60%, calcium silicate slag 30%, low alkalinity sulphoaluminate cement: 10%.

[0020] Production method: first measure the water according to the water-cement ratio of 0.7-0.8 and add it to the mixing tool, then add the measured 30% calcium silicate slag, 10% low-alkalinity sulphoaluminate cement, and 60% desulfurized building gypsum to the mixer in sequence Stir inside, stir for 1-2 minutes, pour the mixed slurry into the forming mold, and after solidifying for 2-3 minutes, start the hydraulic ejector to eject the block from the mold from the lower part of the forming machine, press the block Place them on the drying cart at a distance of 3 cm, and then move them by rails to a continuous hot air drying kiln for drying, or put them in a drying yard for natural drying, and finally tie them up and pack them.

Embodiment 2

[0022] The formula of desulfurization building gypsum waterproof block is (mass percentage)

[0023] Desulfurization building gypsum 70%, calcium silicate slag 20%, low alkalinity sulphoaluminate cement: 10%.

[0024] Production method: first measure the water according to the water-cement ratio of 0.7-0.8 and add it to the mixing tool, then add the measured 20% calcium silicate slag, 10% low-alkalinity sulphoaluminate cement, and 70% desulfurized building gypsum to the mixer in sequence Stir inside, stir for 1-2 minutes, pour the mixed slurry into the forming mold, and after solidifying for 2-3 minutes, start the hydraulic ejector to eject the block from the mold from the lower part of the forming machine, press the block Place them on the drying cart at a distance of 3 cm, and then move them by rails to a continuous hot air drying kiln for drying, or put them in a drying yard for natural drying, and finally tie them up and pack them.

Embodiment 3

[0026] The formula of desulfurization building gypsum waterproof block is (mass percentage)

[0027] Desulfurization building gypsum 60%, calcium silicate slag 30%, low alkalinity sulphoaluminate cement: 8%.

[0028] Production method: first measure the water according to the water-cement ratio of 0.7-0.8 and add it to the mixing tool, then add the measured 30% calcium silicate slag, 8% low-alkalinity sulphoaluminate cement, and 60% desulfurized building gypsum to the mixer in sequence Stir inside, stir for 1-2 minutes, pour the mixed slurry into the forming mold, and after solidifying for 2-3 minutes, start the hydraulic ejector to eject the block from the mold from the lower part of the forming machine, press the block Place them on the drying cart at a distance of 3 cm, and then move them by rails to a continuous hot air drying kiln for drying, or put them in a drying yard for natural drying, and finally tie them up and pack them.

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Abstract

The invention discloses a desulfurized building gypsum water-proof building block, belonging to the technical field of comprehensive utilization of building materials and solid industrial wastes. The building block comprises the following raw materials in percentage by mass: 30-94 percent of desulfurized building gypsum, 0-50 percent of silicon-calcium slag and 6-20 percent of low-alkalinity sulphate aluminum cement. A method for preparing an improved desulfurized building gypsum water-proof building block mainly comprises the following steps of: preparing for materials with desulfurized building gypsum and low-alkalinity sulphate aluminum cement as byproducts obtained after smoke discharged from a coal-burning thermal power plant is desulfurized and silicon-calcium slag as residue obtained after alumina is extracted from high-aluminum pulverized fuel ash as raw materials according to a formula; adding water and stirring to obtain slurry; molding by casting; demolding; and drying or naturally drying. In the invention, the low-alkalinity sulphate aluminum cement and the silicon-calcium slag are doped into the desulfurized building gypsum, so that the water resistance of a desulfurized gypsum building block is greatly enhanced, and very high using value is achieved.

Description

technical field [0001] The invention relates to a desulfurized building gypsum waterproof block, which belongs to the technical field of comprehensive utilization of building materials and solid industrial waste. Background technique [0002] Gypsum block is made of natural gypsum or chemical gypsum to make hemihydrate gypsum, mixed with water, poured and dried to make lightweight construction gypsum products. Due to the characteristics of light weight, heat preservation, heat insulation, sound insulation, and convenient construction, gypsum blocks are widely concerned and loved by people. However, due to its own air-hardness, the softening coefficient of gypsum blocks is generally below 0.5, which greatly limits its wide application in construction engineering walls, and is also a major problem that manufacturers need to solve urgently. Chinese patent documents CN101337376A, CN101892720.A, and CN1425630.A disclose building gypsum and desulfurized building gypsum as base ma...

Claims

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Application Information

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IPC IPC(8): C04B28/36C04B28/14
CPCC04B28/144Y02W30/91C04B7/32C04B18/141
Inventor 赵俊梅张金山李侠
Owner INNER MONGOLIA UNIV OF SCI & TECH
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