Mechanical Properties of Compressed Stabilised Earth Blocks with Rice Husk Ash

Abstract

This study focussed on the usage of Rice Husk Ash (RHA) as a partial replacement of cement for clay soil incompressed earth blocks.  Rice husk ash percentage varied in range of 0%, 2.5%, 5%, 7.5%, 10% and 12.5%.  Highest compressive strength of 1.90 MPa was obtained for blocks admixed with 10% of rice husk ash. Water absorption was found to increase steadily with increase in percent of rice husk ash and value is 8.55% for the block with 12.5% RHA.  Unit weight of blocks decreased with increase in percent of rice husk ash.