EFFECT OF DIFFERENT TYPES OF FLUIDS ON SAND BENTONITE LINER - A REVIEWR. RAJAPRIYA AND V. MURUGAIYANAbstract Municipal Solid waste disposal is a major problem in developing countries; mainly during rainyseason the moisture interacts with municipal solid waste and the leachate percolate to the soil andcontaminating the groundwater. To prevent the groundwater being contaminated, a barrier isprovided between the waste and the groundwater. The compacted sand-bentonite mixturesprepared with various proportions from 5 to 30 % of bentonite was added to the sand is used as alandfill liner material at waste disposal site. If the addition of bentonite content is low then poresbetween the soils is not fully filled and water move freely. On the other hand, large amount ofbentonite reduces the liner material strength. Hence, there is need to select the most appropriateproportion to reach the desired technical requirements for the design of seepage barriers. Toimprove the liner materials and prevent the desiccation cracking, both natural and synthetic fibresare added to the mixture as a reinforcing material. It shows that swelling pressure and swellingpotential decreased from 1.06 to 0.39 mm with increasing the addition of polypropylene fibrecontent between 0.5% and 1.0%, the shrinkage limit of the samples increased with increasing fibrecontent, and the extent of crack formation was reduced significantly.
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