EFFECTIVE UTILIZATION OF QUARRY DUST IN FLEXIBLE PAVEMENTS AS PER IRC-37:2012

Shyam Koganti, Hanumantha Chappidi
2018 unpublished
Expansive soil is a problematic soil due to its low strength and swell-shrink behavior. The expansive soils tend to swell and shrink with respect to increase and decrease of moisture content. Moreover, black cotton soil (expansive soil) is present in many parts of Krishna and Guntur districts of Andhra Pradesh in which state's new capital "Amaravathi" was announced. So, it is necessary to find out cost effective materials for stabilization of black cotton soils which will save economy of the
more » ... te while constructing flexible pavement. The geo-technical properties like maximum dry density (MDD), optimum moisture content (OMC) and California Bearing Ratio (CBR) are found out for various percentages of quarry dust replacements. Influence of 10%, 20%, 30%, 40%, 50%, 60% and 70% of quarry dust on compaction and CBR are presented. Flexible pavement thicknesses for 10%, 20%, 30%, 40%, 50%, 60% and 70% of replacement of quarry dust are also mentioned. From the results it can be proved that up to 40% of quarry dust shows a promising influence on strength characteristics of black cotton soil in construction of flexible pavement. There are 4 types of flexible pavements with bituminous course as surfacing. For easy understanding these are named as type 1, 2, 3 and 4. Pavement thicknesses are calculated for 2, 5, 10, 20, 30, 50, 100 and 150 msa (million standard axles).
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