The Granular Lateritic soil replaced by Bottom Ash for Highway Materials
Keywords:
Lateritic Soil, Bottom Ash, Highway Material, CBRAbstract
The purpose of the study is to investigate the potential of using coal bottom ash (BA) as an aggregate material for subbases in road pavements. The bottom ash from MaeMoh passing 1” sieve was used to replace the Lateritic soil that was sieved into Type A and Type C according to the standard of Department of Highways (DOH), Thailand in the range of 0 – 60%. It is found that the maximum dry density of soil-BA mixtures decreased with increasing BA contents whereas the optimum water content increased. The CBR at optimum water content and optimum water content+2% of both types of lateritic soil replace with BA decrease with the percentage of replacement up 30% and the CBR increase later. Compare with the DOH standard, the lateritic soil replaced with BA in the range of 40 – 60% pass the standard for subbase material.
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