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Cementing material for modifying bulk filling body, preparation method and application of cementing material

A technology of gelling materials and filling materials, applied in the field of gelling materials modified by bulk fillers and its preparation, to achieve the effect of simple raw material ratio, high early strength, and easy-to-obtain raw material ratio

Inactive Publication Date: 2021-04-30
HEBEI UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the existing filling materials, the present invention provides a gelling material for modifying bulk fillings and its preparation method and application. The composition of the gelling material for modifying bulk fillings The composition is simple, low cost, less water required, easy to configure, and has good cohesiveness and high early strength, realizing the rational utilization of solid waste resources

Method used

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  • Cementing material for modifying bulk filling body, preparation method and application of cementing material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] A cementitious material for modification of bulk filling body, comprising the following components in mass percentage: 5% of cement clinker, 85% of slag powder and 10% of desulfurized gypsum powder.

[0026] The slag powder includes 34% of calcium oxide, 12% of magnesium oxide, 34% of silicon dioxide, 17% of aluminum oxide and 3% of ferric oxide in terms of mass percentage; 1. The slag powder obtained by crushing and grinding has a particle size of 40-50 μm.

[0027] The mass content of calcium sulfate dihydrate in the desulfurized gypsum powder is 90%;

[0028] The cement clinker includes 60% of calcium oxide, 5% of magnesium oxide, 25% of silicon dioxide, 6% of aluminum oxide and 4% of iron oxide in mass percentage.

[0029] The preparation method of the cementitious material used for modifying the bulk filling body is as follows: uniformly mix the above-mentioned cement clinker, slag powder and desulfurized gypsum powder according to the above-mentioned mass percent...

Embodiment 2

[0034] A cementitious material for modification of bulk filling bodies, comprising the following components in mass percentage: 20% of cement clinker, 77% of slag powder and 3% of desulfurized gypsum powder.

[0035] The slag powder includes 38% calcium oxide, 10% magnesium oxide, 31% silicon dioxide, 16% aluminum oxide and 5% iron oxide by mass percentage; 1. The slag powder obtained by crushing and grinding has a particle size of 40-50 μm.

[0036] The mass content of calcium sulfate dihydrate in the desulfurized gypsum powder is 95%;

[0037] The cement clinker includes 65% of calcium oxide, 3% of magnesium oxide, 23% of silicon dioxide, 6% of aluminum oxide and 3% of ferric oxide by mass percentage.

[0038]The preparation method of the cementitious material used for modifying the bulk filling body is as follows: uniformly mix the above-mentioned cement clinker, slag powder and desulfurized gypsum powder according to the above-mentioned mass percentage.

[0039] Use the ...

Embodiment 3

[0043] A cementitious material for modification of bulk filling body, comprising the following components in mass percentage: 10% of cement clinker, 84% of slag powder and 6% of desulfurized gypsum powder.

[0044] The slag powder includes 37% of calcium oxide, 11% of magnesium oxide, 32% of silicon dioxide, 15% of aluminum oxide and 5% of ferric oxide in terms of mass percentage; 1. The slag powder obtained by crushing and grinding has a particle size of 40-50 μm.

[0045] The mass content of calcium sulfate dihydrate in the desulfurized gypsum powder is 99%;

[0046] The cement clinker includes 63% of calcium oxide, 4% of magnesium oxide, 24% of silicon dioxide, 5% of aluminum oxide and 4% of iron oxide by mass percentage.

[0047] The preparation method of the cementitious material used for modifying the bulk filling body is as follows: uniformly mix the above-mentioned cement clinker, slag powder and desulfurized gypsum powder according to the above-mentioned mass percent...

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Abstract

The invention relates to the technical field of filling mining, and particularly discloses a cementing material for modifying a bulk filling body, a preparation method and application of the cementing material. The cementing material for modifying the bulk filling body comprises the following components in percentage by mass: 5-20% of cement clinker, 70-90% of slag powder and 3-10% of desulfurized gypsum powder, wherein the slag powder comprises, by mass, 34-38% of calcium oxide, 7-12% of magnesium oxide, 29-34% of silicon dioxide, 15-17% of aluminum oxide and 1-5% of ferric oxide, and the mass content of calcium sulfate dihydrate in the desulfurized gypsum powder is 90-99%. The cementing material for modifying the bulk filling body, provided by the invention, is simple in component composition, low in cost, low in water demand and easy to prepare, has good cohesiveness and relatively high early strength when being used as a raw material of the filling material, and realizes resource utilization of solid wastes.

Description

technical field [0001] The invention relates to the technical field of filling and mining, in particular to a gelling material used for modifying bulk filling bodies, a preparation method and application thereof. Background technique [0002] As China's main energy source, coal plays a vital role in the development of the national economy, accounting for about 60% of my country's primary energy. However, a series of problems such as ground subsidence, water resource loss, and gangue discharge brought about by the coal mining process have had a great impact on the ecological environment of the mining area, and the stope roof collapse caused by the total caving method is even more direct. Threat to mine safety production. [0003] As an important means of green mine construction, filling coal mining technology can effectively solve the problem of disharmony between the development of mining enterprises and the ecological environment of the mining area. An excellent approach ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C04B7/04
CPCC04B7/21C04B7/04Y02P40/10
Inventor 刘建功王翰秋王毅颖史艳楠闫善飞
Owner HEBEI UNIV OF ENG
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