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- W76535561 abstract "Black cotton (BC) soil is a major soil group in India, covering about 200,000 square miles there. This paper discusses its geological, mineralogical, physical, and chemical properties in relation to the construction of road pavements and, more briefly, embankments. BC soil has high swelling and shrinkage properties; it is hard as long as it remains dry, but it loses its stability when wet. On drying, the soil shrinks and cracks very badly. The construction of roads in such soil areas has always presented serious problems, due to the extremely low bearing capacity of the subgrade when it is wet and extensive swelling during wetting. The Central Road Research Institute (CRRI) has conducted investigations for several years on the unsatisfactory performance of many road embankments built on BC soil foundations that have failed to varying degrees. It has been found essential to pulverise soil clods, place them in layers 20cm to 30cm thick, and compact the embankment properly. Methods for improving the bearing capacity of BC soil, to ensure pavement stability, include adequate compaction and use of a sand sub-base. The effects of moisture content have been studied. The paper also considers relevant Indian pavement standards, road berms as an essential pavement component, and the need for roadside drainage." @default.
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- W76535561 date "1999-03-01" @default.
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- W76535561 title "CONSTRUCTION OF ROADS IN BLACK COTTON SOIL" @default.
- W76535561 hasPublicationYear "1999" @default.
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