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IMPROVING THE PROPERTIES OF EXPANSIVE SOILS BY FLY ASH

机译:粉煤灰改善膨胀土的性质

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This paper presents a series of laboratory tests and evaluates the effect of fly ash as an additive in improving the physical and engineering characteristics of an expansive soil. An experimental program has evaluated the effect of fly ash on the Atterberg limits, grain size distribution, specific grativity, activity, free swell index, swell potential, swelling pressure, axial shrinkage, compaction and unconfined compressive strength characteristics of expansive soil. The test results show that the plasticity index, activity, free swell index, swell potential, swelling pressure and axial shrinkage percent decreased with an increase in fly ash content. With the increase in the curing time, the swell potential and swelling pressure decreased. It is found that there is no remarkable change in the unconfined compressive strength of the soils immediately treated with fly ash. However, after 7 days curing of the fly ash treated soils, the unconfined compressive strength increased significantly.
机译:本文提出了一系列实验室测试,并评估了粉煤灰作为一种添加剂的影响,提高了膨胀土的物理和工程特征。实验程序已经评估了粉煤灰对阿特伯格限制,粒度分布,特定耐敷,活性,游离膨胀指数,膨胀电位,膨胀压力,轴向收缩,压实和不包含膨胀土的抗压强度特性的影响。试验结果表明,随着粉煤灰含量的增加,可塑性指数,活动,游离膨胀指数,膨胀电位,膨胀压力和轴向收缩率下降。随着固化时间的增加,膨胀电位和膨胀压力降低。结果发现,立即用粉煤灰处理的土壤的无凝结压缩强度没有显着变化。但是,在7天固化粉煤灰处理的土壤后,无凝结的抗压强度显着增加。

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