Effect of Oil Pollution on Compaction, Strength and Permeability Characteristics of Fly Ash-Sand Composite

摘要

In this study, the variation of compaction, strength and permeability characteristics of fine sand-fly ash composite are studied with varying percentage of fly ash and contaminating oil product used was diesel. After compaction at maximum dry density with optimum water content, the load bearing characteristics, California bearing ratio (CBR), and permeability characteristics of fly ash-fine sand composite and the optimum sand: fly ash mix contaminated with diesel were evaluated. The compaction characteristics of fly ash-sand composite are improved and optimum value of maximum dry density is achieved for 32% fly ash content. The CBR values are observed to improve and the maximum values of soaked and un-soaked CBR are observed for the optimum fly ash content. The maximum dry density of diesel polluted soil composite decreases upon increasing the diesel content and the optimum moisture content also decreases. The un-soaked and soaked CBR values of the soil composite decrease as diesel content in the sand-fly ash composite increases. The permeability of soil composite decreased upon increasing the fly ash content. The permeability of composite decreases further upon contamination with increasing percentages of diesel. Thus, fly ash-fine sand composite can be used in construction of sub-grade for oil storage tanks.