Published Paper Details:

Granular Sub-Base (GSB) layer has become a significant current building practise of all national highway projects in India for pavements placed on weak subgrade. One of the issues in the road construction sector is the proposed strict criteria for GSB material and its non-availability owing to limited sources. Although MORT&H allows for the use of locally accessible materials in the GSB layer, most of them do not meet the recommended standards. Brick dust is a type of brick kiln residue that is readily available in the area. This report summarises the research conducted with the goal of generating GSB mixes that include Brick Dust as a partial replacement for stone dust. The laboratory tests like Grain Size Distribution, Atterberg Limits, Heavy compaction test, Soaked and Un-soaked California Bearing Ratio (CBR) tests were carried out for GSB mixes. Based on the tests results, it is found that GSB Mix -3 with proportion 10:15 (brick dust: Stone Dust) have optimum values for MDD, OMC and CBR test. As a result, brick dust can be utilised as a partial or complete replacement for stone dust in GSB mixes. This stimulates the use of locally available brick kiln debris to a large extent. The use of brick dust in road pavement construction eliminates the problem of disposing of brick kiln waste and saves money on road construction projects.