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Desulfurized gypsum-high-calcium fly ash geopolymer cementing material and preparation method thereof

A technology of high-calcium fly ash and desulfurized gypsum, applied in the field of materials, can solve the problems of high carbon emission and high energy consumption, and achieve the effects of reducing the burden on the environment, reducing huge pressure and reducing costs

Active Publication Date: 2010-10-13
安徽地豪科技环保材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, Portland cement not only consumes a lot of energy, but also its production process is a process of high carbon emissions. The production of 1 ton of cement will emit about 1 ton of greenhouse gases

Method used

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  • Desulfurized gypsum-high-calcium fly ash geopolymer cementing material and preparation method thereof
  • Desulfurized gypsum-high-calcium fly ash geopolymer cementing material and preparation method thereof

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Embodiment Construction

[0020] The main raw materials desulfurized gypsum and high-calcium fly ash in the six embodiments of the present invention are taken from a power plant, and their main components are shown in Table 1. Sodium hydroxide is a chemical reagent containing 99.2% NaOH; commercially available liquid sodium silicate has a solid content of 38.3% and contains 9.1% NaOH 2 O, 29.2% SiO 2 and 61.7% water.

[0021] Table 1 Main chemical components and contents of desulfurized gypsum and high calcium fly ash (wt.%)

[0022]

[0023] Example ①

[0024] a. Mix sodium hydroxide with liquid sodium water glass to control its modulus M (SiO 2 ) / n(Na 2 O) is 1.5, made into a compound chemical admixture, aged for 24h, and set aside.

[0025] b. Control the temperature rise rate to 10°C / min, raise the temperature of the desulfurized gypsum to 600°C, and calcinate for 1 hour to obtain heat-treated desulfurized gypsum, which is cooled for later use.

[0026] c. Mix high-calcium fly ash and heat...

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Abstract

The invention discloses a desulfurized gypsum-high-calcium fly ash geopolymer cementing material and a preparation method thereof. In the geopolymer cementing material, high-calcium fly ash is used as a main raw material, desulfurized gypsum after heat treatment is used as a mineral admixture, and a solution prepared by sodium hydroxide and liquid sodium silicate is used as a composite chemical admixture. The invention determines the heat treatment mode of the desulfurized gypsum and the modulus and the addition of the composite chemical admixture, and enables the system to have better performance in certain curing environment. In the invention, high-calcium fly ash and sludge which are industrial wastes are utilized, thereby relieving the environmental burden, lowering the cost and reducing resource consumption. Moreover, the geopolymer cementing material is an environment-friendly cementing material with low carbon emission, meets the current social development trend, and has good economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a new type of low-alloy low-temperature chemical compound prepared by using high-calcium fly ash as a silicon-aluminum source raw material, using desulfurization gypsum as a mineral admixture, and using a solution prepared from sodium water glass and sodium hydroxide as a composite chemical admixture. Carbon-emitting geopolymer cementitious material and preparation method thereof. Background technique [0002] Cement is a traditional cementitious material, which has made great contributions to human economic development and social progress. However, the shortage of raw materials for Portland cement has become a very urgent practical problem that the world must face. will run out. In addition, Portland cement not only consumes a lot of energy, but also its production process is a process of high carbon emissions. The production of 1 ton of cement will emit about 1 ton of greenhouse gases. ...

Claims

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Application Information

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IPC IPC(8): C04B11/26
CPCC04B28/008Y02P40/10Y02W30/91C04B12/04C04B18/08C04B20/04C04B22/062C04B22/145C04B40/0028C04B40/0263
Inventor 郭晓潞施惠生
Owner 安徽地豪科技环保材料有限公司
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