This paper describes the compaction and strength behavior of black cotton soil (BC soil) reinforced with polyproplene fibers. The extent of increase in strength of black cotton soil, for varying diameters (6mm and 12 mm) and percentages (0.50%, 0.75%, 1%, 1.25% and 1.50%) of polypropylene fibres were found out by conducting unconfined compressive strength test and Atterbergs limit test. The effect of polypropylene fibre on improving the strength of black cotton soil was found. Comparison of the properties of soil before and after the addition of fibre was made.

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