Strength Properties of Lateritic Soil replaced by Bottom Ash
Keywords:
Bottom Ash, Compaction, CBRAbstract
The research aimed to study the strength properties of laterite soil replaced bottom ash. The bottom ash is a by-product from BLCP Power Co., Ltd., Rayong province and laterite soil is from Saraburi province. The grain size distribution of lateritic soil was graded according to the Department of Highways Standard, DOH 205/2532 Type B and Type D. The bottom ash replacement ratios are at 10, 20, 30, 40 and 50 percent for Type B and at 10, 20, 30, 40, 50 and 60 percent for Type D. The results showed that both types of lateritic soils had the maximum dry density tended to decrease with the bottom ash replacement ratio. On the opposite way the optimum water content increased with the bottom ash replacement ratio. For the strength properties, it was found that for Type B and Type D when replaced with bottom ash resulted in a higher CBR value to the optimum replacement ratio. After that, the CBR tends to decrease which means the bottom ash can improve the strength properties of lateritic soil. Compare to DOH standard for subbase material, the lateritic soil Type B and Type D can be replaced by bottom ash in the range of 30 – 50 percent for subbase material.
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