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1 粉煤灰的物理性质指标安阳火电厂丰安桥筑灰场粉煤灰呈灰色,无粘性,天然干密度0.50～0.72g/cm~3,相对密度0.133,具有质地疏松和高压缩性的特征,颗粒多为粉粒,且几乎不含粘粒,因此按照松散土体的分类标准,粉煤灰属于高压缩性的无粘性土类。颗粒分析结果表明:粉煤灰以0.075～0.005mm及0.25～0.075mm为主,分别占总含量的81.3%和17.2%,小于0.005mm的粒组仅占1.5%,粉煤灰的不均匀系数C_u平均小于5,曲率系数C_c
1 physical indicators of fly ash Anyang thermal power plant Feng’an Bridge ash yard gray, non-sticky, natural dry density of 0.50 ~ 0.72g / cm ~ 3, the relative density of 0.133, with a loose texture and high compressibility Characteristics of the particles are mostly silt, and almost no clay, so in accordance with loose soil classification criteria, fly ash belongs to high compressibility of non-cohesive soil. The results of particle analysis showed that fly ash was mainly composed of 0.075-0.005 mm and 0.25-0.075 mm, accounting for 81.3% and 17.2% of the total content respectively, accounting for only 1.5% of the particles less than 0.005 mm. The nonuniformity of fly ash C_u average less than 5, the coefficient of curvature C_c