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Early-strong-type geopolymer paste filling material and preparation method thereof

A geopolymer and paste filling technology, applied in cement production, etc., can solve the problems of low early strength and high cost, and achieve the effect of high early strength, low cost and good pumpability

Inactive Publication Date: 2018-05-29
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Paste filling mining technology is to optimize the combination of one or more filling materials and water to prepare a paste-like cemented body with good stability, fluidity and plasticity. The form of the plunger flow is transported to the goaf to complete the process of filling. The filling material is the basis of paste filling, but the filling materials currently used are generally coal gangue, fly ash, mine tailings, slag and cement. Common defects of high cost and low early strength

Method used

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  • Early-strong-type geopolymer paste filling material and preparation method thereof
  • Early-strong-type geopolymer paste filling material and preparation method thereof
  • Early-strong-type geopolymer paste filling material and preparation method thereof

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Effect test

Embodiment 1

[0021] An early-strength geopolymer paste filling material takes 1m 3 , the quality of each raw material composition is: coal gangue coarse aggregate 373kg, coal gangue fine aggregate 894kg, fly ash 224kg, geopolymer cementitious material 130kg, water glass with a modulus of 1.6 47.5g, water 380kg, early Strong agent 2.6kg and water reducing agent 3.9kg. Among them, the composition of geopolymer cementitious material is: fly ash 65kg; slag 33kg, cement 32kg.

[0022] The particle size D of the coal gangue coarse aggregate is 4.75-13.2mm.

[0023] The particle size d<4.75mm of the coal gangue fine aggregate, wherein the coal gangue fine aggregate with a particle size of 2.36mm≤d<4.75mm accounts for 38.8%, and the coal gangue fine aggregate with a particle size of 1.18mm≤d<2.36mm Accounted for 14.2%, coal gangue fine aggregate with a particle size of 0.6≤d<1.18 accounted for 8.8%, coal gangue fine aggregate with a particle size of 0.3≤d<0.6 accounted for 10.4%, and coal gangue...

Embodiment 2

[0033] An early-strength geopolymer paste filling material takes 1m 3 , the quality of each raw material composition is: coal gangue coarse aggregate 368kg, coal gangue fine aggregate 882kg, fly ash 221kg, geopolymer cementitious material 150kg, water glass with a modulus of 1.6 54.6g, water 380kg, early Strong agent 3kg and water reducer 4.5kg. Among them, the composition of geopolymer cementitious material is: fly ash 75kg; slag 38kg, cement 37kg.

[0034] The particle size D of the coal gangue coarse aggregate is 4.75-13.2mm.

[0035] The particle size d<4.75mm of the coal gangue fine aggregate, wherein the coal gangue fine aggregate with a particle size of 2.36mm≤d<4.75mm accounts for 38.8%, and the coal gangue fine aggregate with a particle size of 1.18mm≤d<2.36mm Accounted for 14.2%, coal gangue fine aggregate with a particle size of 0.6≤d<1.18 accounted for 8.8%, coal gangue fine aggregate with a particle size of 0.3≤d<0.6 accounted for 10.4%, and coal gangue fine agg...

Embodiment 3

[0045] An early-strength geopolymer paste filling material takes 1m 3, the quality of each raw material composition is: coal gangue coarse aggregate 363kg, coal gangue fine aggregate 869kg, fly ash 217kg, geopolymer cementitious material 170kg, water glass with a modulus of 1.6 62.1g, water 380kg, early Strong agent 3.4kg and water reducer 5.1kg. Among them, the composition of geopolymer cementitious material is: fly ash 85kg; slag 43kg, cement 42kg.

[0046] The particle size D of the coal gangue coarse aggregate is 4.75-13.2mm.

[0047] The particle size d<4.75mm of the coal gangue fine aggregate, wherein the coal gangue fine aggregate with a particle size of 2.36mm≤d<4.75mm accounts for 38.8%, and the coal gangue fine aggregate with a particle size of 1.18mm≤d<2.36mm Accounted for 14.2%, coal gangue fine aggregate with a particle size of 0.6≤d<1.18 accounted for 8.8%, coal gangue fine aggregate with a particle size of 0.3≤d<0.6 accounted for 10.4%, and coal gangue fine ag...

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Abstract

The invention provides an early-strong-type geopolymer paste filling material and a preparation method thereof. Each cubic meter of the filling material comprises the following components by weight: 350-390kg of a coal gangue coarse aggregate, 860-920kg of a coal gangue fine aggregate, 200-250kg of coal ash, 130-180kg of a geopolymer cementing material, 45-65kg of an alkali activator, 350-420kg ofwater, 2-5kg of an early-strength agent and 3-6kg of a water reducing agent. The preparation method comprises the following steps: carrying out proportioning according to the raw material componentsof the early-strong-type geopolymer paste filling material, respectively crushing coal gangue into the coal gangue coarse aggregate and coal gangue fine aggregate, uniformly mixing the geopolymer cementing material with the alkali activator and part of the water, then adding the coal gangue coarse aggregate, the coal gangue fine aggregate, the coal ash, the remained water, the early-strength agentand the water reducing agent, and carrying out uniform mixing again to obtain the early-strong-type geopolymer paste filling material.

Description

technical field [0001] The invention relates to a solid material for mine filling, in particular to an early-strength geological polymer paste filling material and a preparation method thereof. Background technique [0002] my country's "three downs and ups" - the amount of compressed coal under buildings, under railways, under water bodies and above confined water is huge. These external factors have greatly affected and restricted the development of coal mining and the industry. Moreover, while underground mining obtains useful mineral resources, it also produces a large amount of solid waste (such as coal gangue) and underground goafs. The solid waste piles attached to coal mines exist on the surface, which not only pollutes the local ecological environment, but also wastes land resources. , and there may be safety hazards. At the same time, the underground goaf will cause deformation and subsidence of the surface of the mining area, which will seriously threaten the saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/006C04B2111/00663C04B2201/50C04B18/12C04B18/08C04B12/04C04B24/122C04B24/16Y02P40/10
Inventor 孙琦田硕孙庆巍李兵蔡畅于阳夏亚杰姚念希魏学达
Owner LIAONING TECHNICAL UNIVERSITY