Study on Amended Soil Liner with Additive

Landfill is a primary method for the disposal of waste. The waste is contained by a liner and a cover system. Liner system has great importance in preventing contact between waste and environment. But the use of high tech liner system like GCL results a substantial increase in the cost of waste disposal. Hence the usage of compacted clay liner is a common and efficient method of practice. Landfill liner can also be prepared using locally available soil.The locally available soil can be mixed with medium to high plastic clay or commercially available clay like bentonite form amended soil liner. The resultant liner mix should possess a permeability of less than 1?10-7 cm/s. Several researchers have carried out investigations for efficient and economic liners. This study makes an attempt to produce a liner using locally available lateritic soil, bentonite, and additive. Lateritic soil is mixed with bentonite in different percentages from 0 to 60%. Then the optimum combination of bentonite-laterite mix for liner application determined based on permeability. From the optimum mix bentonite replaced by fly ash upto 50% and studied the variation in properties such as consistency limits, dry density, OMC, permeability and UCC strength of each mix with the addition of fly ash.