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Inorganic heat-preservation sand pulp with desulfurated gypsum as main gelled materials

A technology of inorganic thermal insulation mortar and desulfurization gypsum, applied in the field of building materials, can solve the problems of high shrinkage, poor fire resistance, high density, etc., and achieve better effects, excellent thermal insulation performance, and better use.

Inactive Publication Date: 2010-07-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a cementitious material, cement itself has high density, large shrinkage rate, and poor fireproof performance. It is of great significance to find an alternative material with good fire resistance and small shrinkage rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Example 1, an inorganic thermal insulation mortar with desulfurization gypsum as the main cementitious material, according to desulfurization gypsum 100, vitrified microbeads 50, S75 slag powder 2.5, grade III high-calcium fly ash 2, β-hemihydrate gypsum 2.5 , lime 1, latex powder 1, polyvinyl alcohol fiber 0, cellulose ether 0, and air-entraining superplasticizer 0, and the water consumption is 120% of the total mass of the dry powder material. This plasterboard product has a dry density of 397kg / m 3 , the compressive strength is 1.1MPa, the flexural strength is 0.2MPa, the compressive shear bond strength is 75kPa, the softening coefficient is 0.57, and the thermal conductivity is 0.082W / m.K.

Embodiment 2

[0043] Example 2, an inorganic thermal insulation mortar with desulfurized gypsum as the main cementitious material, according to desulfurized gypsum 100, vitrified microbeads 120, S95 slag powder 10, class II high-calcium fly ash 10, β-hemihydrate gypsum 10 , lime 5, latex powder 5, polyvinyl alcohol fiber 0.3, cellulose ether 1 and air-entraining superplasticizer 0.5 by weight, wherein the water consumption is 60% of the total mass of the dry powder material. This gypsum board product has a dry density of 288kg / m 3 , the compressive strength is 1.6MPa, the flexural strength is 0.6MPa, the compressive shear bond strength is 221kPa, the softening coefficient is 0.72, and the thermal conductivity is 0.066W / m.K.

Embodiment 3

[0044] Example 3, an inorganic thermal insulation mortar with desulfurized gypsum as the main cementitious material, according to desulfurized gypsum 100, vitrified microbeads 70, S95 slag powder 3, grade III high-calcium fly ash 10, β-hemihydrate gypsum 5 , lime 1, latex powder 1, polyvinyl alcohol fiber 0.1, cellulose ether 0.2 and air-entraining superplasticizer 0.1 by weight, wherein the water consumption is 100% of the total mass of the dry powder material. This plasterboard product has a dry density of 378kg / m 3 , the compressive strength is 1.3MPa, the flexural strength is 0.3MPa, the compressive shear bond strength is 145kPa, the softening coefficient is 0.65, and the thermal conductivity is 0.078W / m.K.

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Abstract

The invention belongs to the technical field of building materials and particularly relates to inorganic heat-preservation sand pulp with desulfurated gypsum as main gelled materials. The inorganic heat-preservation sand pulp is composed of the desulfurated gypsum, slag powder, pulverized fuel ash, Beta-semi-hydrated gypsum, lime, latex powder, vinol fibers, cellulose ether and an air entraining type high-efficiency water reducing agent. The invention not only can solve the high-efficiency recycling problem of the desulfurated gypsum (an industrial solid waste), but also can effectively avoid the problems that the hydration of the desulfurated gypsum is slow and the water resisting property of the traditional gypsum-based inorganic heat-preservation sand pulp is poor. Therefore, the invention is suitable for wall body heat-preservation engineering construction of various buildings and can meet certain requirement for the intensity.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an inorganic thermal insulation mortar with desulfurized gypsum as the main gelling material. Background technique [0002] Desulfurization gypsum is used to eliminate SO in flue gas of coal-fired furnace 2 emissions, install a wet desulfurization device, and use desulfurization materials calcium carbonate and SO 2 formed by the reaction. Because its main component is dihydrate gypsum, it is called desulfurization gypsum. [0003] my country currently uses coal as the main energy source, and the sulfur content of coal in my country is generally high, and coal combustion in power plants produces a large amount of SO 2 , the amount of desulfurized gypsum produced by the desulfurization process will be huge. Many local governments have begun to feel the social pressure brought about by the reasonable disposal of desulfurization gypsum. According to statis...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/28C04B28/147Y02W30/91C04B14/24C04B16/0641C04B18/08C04B18/141C04B22/064C04B22/143C04B24/26C04B24/383C04B2103/304C04B2103/302
Inventor 孙振平郑金飚黄晖皓吴小琴杨洁郑琨鹏叶丹玫
Owner TONGJI UNIV
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