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Cementing material containing silicon-calcium slag and preparation method thereof

A cementitious material, calcium silicate slag technology, applied in cement production, etc., can solve the problems of less addition of calcium silicate slag, high cost, complex preparation process of calcium silicate slag cement, etc., to achieve reduced production costs, good early strength and The effect of late strength

Inactive Publication Date: 2014-11-05
DATANG INT HIGH ALUMINA COAL R & D CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a cementitious material containing silicon-calcium slag and a preparation method thereof, which are used to solve the problems of complex preparation process, high cost, less addition of silicon-calcium slag and no need for the preparation of silicon-calcium-calcium slag cement in the prior art. β-C 2 Technical defects such as reasonable utilization of S and alkali

Method used

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  • Cementing material containing silicon-calcium slag and preparation method thereof
  • Cementing material containing silicon-calcium slag and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Calcium silicon slag (dried to moisture content ≤ 2%), fly ash, cement clinker, granulated blast furnace slag, desulfurized gypsum and calcium lignosulfonate are mixed evenly according to the weight ratio, and then ground to a particle size of 400m 2 / kg, made cementitious material, and it comprises following components according to percentage by weight: calcium silicate slag 54%, fly ash 14%, cement clinker 20%, granulated blast furnace slag 6%, desulfurization gypsum 5%, Calcium lignosulfonate 1%.

[0031] According to the GB175-2007 "General Portland Cement" standard, the quality of the cementitious material is tested,

[0032] The test results are shown in Table 1.

Embodiment 2

[0034] Calcium silicate slag (dried to moisture content ≤ 2%), fly ash, cement clinker, granulated blast furnace slag, anhydrous gypsum, sodium chloride and sodium phosphate are mixed evenly according to the weight ratio, and then ground to Particle size is 500m 2 / kg, to obtain cementitious material, which comprises the following components according to weight percentage: 44% of calcium silicate slag, 10% of fly ash, 25% of cement clinker, 15% of granulated blast furnace slag, and 5% of anhydrous gypsum , 0.5% sodium chloride, 0.5% sodium phosphate; the quality test results of the gelled material are shown in Table 1.

Embodiment 3

[0036] Calcium silicate slag (dried to moisture content ≤ 2%), fly ash, cement clinker, granulated blast furnace slag, dihydrate gypsum, and sodium polyphosphate are mixed evenly according to the weight ratio, and then ground to a particle size of 300m 2 / kg, to obtain cementitious material, which comprises the following components according to weight percentage: 65% calcium silicate slag, 5% fly ash, 15% cement clinker, 10% granulated blast furnace slag, 3% dihydrate gypsum , sodium polyphosphate 2%; the quality inspection results of the gelled material are shown in Table 1.

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Abstract

The invention provides a cementing material containing silicon-calcium slag and a preparation method thereof. The cementing material comprises the following components in percentage by weight: 30-65 percent of the silicon-calcium slag, 5-40 percent of coal powder ash, 10-30 percent of cement clinker, 5-30 percent of pelletized blast furnace slag, 3-10 percent of gypsum and 0.5-3 percent of an additive. The preparation method comprises the following steps: mixing the silicon-calcium slag, the coal powder ash, the cement clinker, the pelletized blast furnace slag, the gypsum and the additive to obtain a mixture; and grinding the mixture to obtain the cementing material. The cementing material provided by the invention has high early strength and high later strength. In particular, the cementing material is prepared of solid wastes such as the silicon-calcium slag and the coal powder ash, so that environmental protection is facilitated, and resources are saved.

Description

technical field [0001] The invention relates to a gelling material, in particular to a gelling material containing silicon-calcium slag and a preparation method thereof. Background technique [0002] Calcium silicate slag is the residue left after alumina is extracted from high-alumina fly ash. At present, the industrial application of high-aluminum fly ash in China is the pre-desilication-alkali-lime sintering method developed by Inner Mongolia Datang International Renewable Resources Development Co., Ltd. (Patent Publication No.: CN 102249253A). Fly ash is pre-desiliconized to obtain desiliconization liquid and fly ash; then add milk of lime to the desilication liquid to react to generate calcium silicate, and then obtain active calcium silicate through dealkalization, and add to the fly ash at the same time Sodium carbonate, limestone, etc., after being roasted to form clinker, and then undergo a series of subsequent treatments to produce alumina. This method produces 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/14
CPCY02P40/10
Inventor 杨志杰孙俊民苗瑞平
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
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