Titanium-gypsum-based material for filling goaf and preparation method thereof

A titanium gypsum and base material technology, applied in the field of titanium gypsum base material and its preparation, can solve problems such as large differences in formulations, and achieve the effects of low cost, shortened final setting time, and convenient construction

Active Publication Date: 2019-10-25
山东生态环境研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN101486533A early-strength glue solid powder for mining filling only provides glue solid powder with a simple formula of slag, lime, desu...

Method used

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  • Titanium-gypsum-based material for filling goaf and preparation method thereof
  • Titanium-gypsum-based material for filling goaf and preparation method thereof
  • Titanium-gypsum-based material for filling goaf and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 prepares titanium gypsum-based material

[0028] (1) A titanium gypsum-based material for goaf filling, according to titanium gypsum 80, desulfurization gypsum 6, 425 Portland cement 6, fly ash 3, silica fume 3, slag 2, sodium citrate 1‰ , sodium carboxymethyl cellulose 1‰, naphthalene-based water reducer 3‰, activator 1‰, standard thickness 90% prepared into a triple model, and cured for 7 days at a temperature of 20°C and a humidity of 55%. The relevant test data are shown in the table 1.

[0029] Table 1. Test related data of titanium gypsum material

[0030]

[0031] (2) A titanium gypsum-based material for goaf filling, according to titanium gypsum 75, desulfurization gypsum 5, 425 Portland cement 10, fly ash 5, silica fume 2, slag 3, sodium citrate 1‰ , sodium carboxymethyl cellulose 1.5‰, naphthalene-based water reducer 3‰, activator 1.3‰, standard thickness 95% prepared into a triple model, and cured for 7 days at a temperature of 20°C and a hu...

Embodiment 2

[0038] Take titanium gypsum, desulfurized gypsum, 425 Portland cement, fly ash, silica fume, slag respectively according to the ratio of (1) (2) (3) in embodiment 1, these several kinds of materials are fully mixed, and Pour the mixed materials into the mixed solution of naphthalene-based water reducer, sodium citrate, sodium carboxymethylcellulose, and activator and water that has been stirred, and stir evenly to prepare titanium gypsum-based materials 1, titanium For gypsum-based material 2 and titanium gypsum-based material 3, pour the three kinds of slurries into the Vicat instrument to test the initial and final setting time; at the same time, prepare the slurry according to the above slurry preparation method and pour it into a 40mm*40mm*160mm triple mold After 1.5-2 hours, demould, put it in an environment of 20±1°C and humidity 50-65% for 7 days, and then dry it at 42°C to test its 7d strength

[0039] The control group is set to use ordinary cement, and the cement-bas...

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Abstract

The invention discloses a titanium-gypsum-based material for filling a goaf and a preparation method thereof. The titanium-gypsum-based material for filling the goaf is prepared by the steps that titanium gypsum after calcination and aging is taken as a main raw material, a small amount of portland cement, desulfurized gypsum, fly ash and other components are added, and the preparation is completed through mixing, molding and demoulding. According to the titanium-gypsum-based material and the preparation method thereof, a solid waste material is fully utilized, the use cost of fillers is reduced, the material is good in fluidity and workability, construction is convenient, and the final setting time is shortened relative to a cement-based material, so that the filling time is reduced.

Description

technical field [0001] The invention relates to a titanium gypsum-based material for goaf filling and a preparation method thereof, belonging to the field of chemical materials. Background technique [0002] After the mining of some minerals such as gold mines and coal mines, a large hollow area is left underground. After a long period of idleness, the mined-out area will cause the risk of roof rock collapse, causing surface subsidence, and seriously affecting surface farmland and buildings. What's more, it will affect the normal life of residents. At present, cement-based materials are mainly used for filling the goaf, which can effectively alleviate the risk of collapse in the hollow area after filling. However, cement is used as the main material for the goaf, and the initial and final setting time of cement is relatively long, which is not conducive to the overall The filling project can be completed quickly; at the same time, the cement has a certain shrinkage after so...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/00724C04B2201/50C04B22/146C04B7/02C04B18/08C04B18/146C04B18/141C04B24/06C04B24/383C04B24/226C04B22/147
Inventor 于吉涛宋宪涛
Owner 山东生态环境研究院有限公司
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