Compaction of Rice Husk Ash Cement Concrete

Abstract

The research work presents preliminary details of a laboratory
study of roller compacted concrete (RCC) mixes containing different
proportions of rice husk ash (RRA) with different water contents after
up to 28 days of hydration process. This work also focuses on finding
the optimum water content based on 28- day compressive strength for each
mix types of RCC containing 0,30,50,70 and 100% RRA by weight.
Mechanical properties of RCC mixes such as compressive
strength was examined. A reduction in compressive strength depends on
the proportion of RRA present in the compacted concrete mixes. It was
shown that RCC mixes containing RRA up to 50% can produce an acceptable
compressive strength of about 45 MFa. The effect of compaction on concrete
containing RHA also was investigated, and the results showed that
at the same amount of cementitious material (50% RRA + 50% portland
cement) RCC is much stronger than normal concrete.