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Early strength mine filling cementitious material

A technology for mine filling and cementitious materials, applied in the field of cementitious materials, can solve the problems of complex production process and high cost, and achieve the effect of simple preparation process, large amount of filling and significant growth

Inactive Publication Date: 2011-11-09
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For less clinker slag cement, the clinker is relatively small, but still about 30%, and it requires more types of composite activators and admixtures, the production process is more complicated, and the products produced can have early strength. but the cost is still higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An early-strength mine filling cementitious material of the present invention comprises 74% of blast furnace slag, 11% of quicklime, 14% of sulphoaluminate cement and 1% of activator. The first three materials are ground by ultra-fine grinding machine, the fineness control is measured according to GB8074-87 (Burner method), and the specific surface area is controlled at 3500±100cm 2 / g. According to GB / T1346-2001, the water consumption of the standard consistency of the material is measured, the slurry is prepared according to the measured water consumption of the standard consistency, the slurry is stirred evenly according to GB / T17671-1999, and then poured into a triple test block of 4cm*4cm*16cm , placed in a constant temperature (20°C) constant humidity (relative humidity 95%) curing box for curing until the specified age, and the uniaxial compressive strength of the cemented body was measured.

[0017] maintenance time

Embodiment 2

[0019] An early-strength mine filling cementitious material of the present invention comprises 75% of blast furnace slag, 7.25% of quicklime, 16.5% of sulphoaluminate cement and 1.25% of activator. The first three materials are ground by ultra-fine grinding machine, the fineness control is measured according to GB8074-87 (Burner method), and the specific surface area is controlled at 3500±100cm 2 / g. According to GB / T1346-2001, the water consumption of the standard consistency of the material is measured, the slurry is prepared according to the measured water consumption of the standard consistency, the slurry is stirred evenly according to GB / T17671-1999, and then poured into a triple test block of 4cm*4cm*16cm , placed in a constant temperature (20°C) constant humidity (relative humidity 95%) curing box for curing until the specified age, and the uniaxial compressive strength of the cemented body was measured.

[0020] maintenance time

Embodiment 3

[0022] An early-strength mine filling cementitious material of the present invention comprises 71% of blast furnace slag, 7% of quicklime, 21% of sulphoaluminate cement and 1% of activator. The first three materials are ground by ultra-fine grinding machine, the fineness control is measured according to GB8074-87 (Burner method), and the specific surface area is controlled at 3500±100cm 2 / g. According to GB / T1346-2001, the water consumption of the standard consistency of the material is measured, the slurry is prepared according to the measured water consumption of the standard consistency, the slurry is stirred evenly according to GB / T17671-1999, and then poured into a triple test block of 4cm*4cm*16cm , placed in a constant temperature (20°C) constant humidity (relative humidity 95%) curing box for curing until the specified age, and the uniaxial compressive strength of the cemented body was measured.

[0023] maintenance time

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PUM

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Abstract

The invention relates to an early strength mine filling cementitious material. After blast furnace water quenching slag is crushed to have certain fineness, quick lime is added in a certain ratio, and a certain amount of sulphate aluminum cement or sulphoaluminate cement clinker and exciting agent of water glass are added. A weight ratio of the blast furnace water quenching slag to the quick slime to the sulphate aluminum cement or sulphoaluminate cement clinker to the exciting agent of water glass is (65-85):(10-20):(5-25):(0.5-5.0). The four materials are uniformly mixed in a ratio to form the mine filling cementitious material. The blast furnace slag is taken as a main raw material, the cost is low, the resources are recycled, and the early strength mine filling cementitious material accords with the sustainable development policy and has obvious economic and environmental benefits. Raw materials for preparing the material are convenient to obtain, the preparation process is simple, sintering is not needed, the material can be obtained at normal temperature, and the emission of waste gas and waste residue is avoided. The energy is saved and the environment is improved. The sulphate aluminum cement or sulphoaluminate cement clinker can improve the early strength of a filling body to meet the requirements of special working conditions. Moreover, the cementing agent has high cementing property, high bonding force with tailing sand, gravel, river sand, coal gangue, fly ash and the like, and high adaptability to filling aggregates.

Description

technical field [0001] The invention relates to the field of cementitious materials, and specifically refers to an early-strength mine filling cementitious material, which is suitable for filling goafs in mines, and is especially suitable for areas where the roof of the goaf is unstable and needs to be filled in time after the goaf is formed. Background technique [0002] In the mine goaf filling method, the filling cementitious material used is mainly traditional cementitious material cement, but the production process of cement is complicated, especially its calcination process consumes a lot of energy, destroys the ecological environment, and also Caused its production cost to be higher. The early strength of ordinary cement is not high, and it cannot meet the requirements of goaf filling that requires high early strength. The current early-strength and fast-setting cement is made of limestone, gypsum, clay and bauxite to make raw materials, which are ground and calcined...

Claims

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Application Information

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IPC IPC(8): C04B28/36C04B18/14
CPCC04B28/06Y02W30/91C04B12/04C04B14/068C04B18/08C04B18/12C04B18/141C04B22/064
Inventor 吕宪俊胡术刚王健邱俊陈平王桂芳金子桥
Owner SHANDONG UNIV OF SCI & TECH
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