Study of Variation in Moulding Water Content on the Strength Properties of Red Earth Soil Treated with Additives
DOI:
https://doi.org/10.18311/jmmf/2023/35430Keywords:
Bagasse Ash, Calcium Salts, Lime, Red Earth SoilAbstract
Non Expansive (NE) soils are known as Red Earth (RE) soils in Karnataka, India and are non-expansive in nature. Kaolinite clay mineral is the component responsible for NE behaviour of soil. Beyond Optimum Moisture Content (OMC), soil whether are expansive or non-expansive, lose their stiffness and strength. To assess the role of Moisture Content (M/C) on RE soil and with additives such as Bagasse Ash (B.A.), lime (lm) and calcium salts (calcium sulphate and calcium chloride), an investigation has been carried out. Various laboratory tests such as Atterberg’s, limit, compaction and unconfined compressive strength tests have been carried out on RE soil which is treated with additives. B.A., lm and calcium salts changed the Atterberg’s limit of RE soil. At Dry of Optimum (DOO) to Wet of Optimum (WOO) condition, compaction test was conducted. Compaction characteristics varied with the addition of additives with varying moulding water content. However, B.A. addition gives only mechanical effect and strength improvement is marginal. Along with B.A., lm and Calcium Chloride (CC) are added to soil which gave promising results due to formation of amorphous gel like substance. Calcium Sulphate (CS) addition is not recommended for soil due to decrease in strength with curing. The strength achieved for the soil compacted at DOO is more pronounced as compared to soil compacted at WOO.
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