Study on Basic Experiment of Coal Waste Paste Filling Material

Abstract:

Based on present situation that coal mining under buildings, water bodies and railways, and solid wastes mainly including coal waste, fly ash in coal mine of our country, optimization proportioning of paste filling material and hydration reaction mechanism is systematicaly researched combining with project practice of paste filling in Daizhuang Coal Mine, Zibo Mining Group. The result shows that: Proportioning design P10 can be used as the optimal proportion results, the rate of cementing material is that the proportion: fly ash: coal waste is 1:4:6, quantity concentration is 74%; Coal waste paste XRD diffraction patterns of different instar shows that its hydration products at different instar stage are mainly gelation of CH, Aft and C-S-H; Relative content of each material in hydration products is different at different instar stage; With scanning electron microscope a certin ettringite is producted after coal waste paste hydrated 8h, and content of C-S-H gelation and CH gelation is increased gradually; Hydration process of portland cement is speed up and the strength of paste is enhanced.

• Periodical: Applied Mechanics and Materials (Volumes 174-177)
• Pages: 384-389
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.174-177.384
• Online since: May 2012
• Authors: Xin Guo Zhang, Ning Jiang, Heng Wang, Yang Yang Li
• Keywords: Coal Waste, Hydration Mechanism, Optimization Proportion, Uniform Design

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