煤矸石–粉煤灰陶粒制备及其混凝土试件性能特征研究

Research on the Preparation of Coal Gangue-Fly Ash Ceramsite and the Performance Characteristics of Its Concrete Specimens

摘要: 以煤矸石和粉煤灰为原料，按照不同配比制备多孔陶粒，研究煤矸石和粉煤灰配比对陶粒堆积密度、筒压强度、表观密度和孔隙率的影响。再以煤矸石–粉煤灰陶粒为主要原料，添加水泥、矿粉和减水剂等，制备陶粒混凝土试件，分析不同龄期试件的抗压强度和容重。结果表明：随着粉煤灰掺量增加，陶粒堆积密度和表观密度先增大后减小，孔隙率先减小后增大，筒压强度整体呈减小趋势；陶粒混凝土试件，抗压强度随龄期增长而增大，容重随龄期增长呈波动性变化，前后相差不大。研究结果为煤矸石–粉煤灰陶粒在建材领域的应用提供了参考。

Abstract: Using coal gangue and fly ash as raw materials, porous ceramic particles were prepared according to different ratios, and the effects of coal gangue and fly ash ratios on the bulk density, cylinder compression strength, apparent density, and porosity of ceramic particles were studied. Using coal gangue-fly ash ceramic particles as the main raw material, cement, mineral powder, and water reducing agents are added to prepare ceramic particle concrete specimens, and the compressive strength and bulk density of specimens at different ages are analyzed. The results show that with the increase of fly ash content, the bulk density and apparent density of ceramic particles first increase and then decrease, the porosity first decreases and then increases, and the overall compressive strength of the cylinder shows a decreasing trend. The compressive strength of ceramic aggregate concrete specimens increases with age, and the bulk density fluctuates with age, with little difference between the early and late stages. The research results provide reference for the application of coal gangue fly ash ceramic particles in the field of building materials.