OPTIMIZATION OF THICKNESS OF PAVEMENT QUALITY CONCRETE SLAB USING RICE HUSK ASH

摘要

There is growing interest in the construction pavements, due to its high strength, durability, better serviceability and overall economy in the long run. The thrust nowadays is to produce thinner sections of better quality, which can carry the heavy loads. The present study aims at, developing pavement quality concrete mixtures incorporating rice husk ash dust as partial replacement of cement. The aim is to the design of slab thickness of PQC pavement using the achieved flexural strength of the concrete mixtures. The flexural strength examined for different percentages of RHA with replacement of cement (by weight) i.e. for 5%, 10%, 15% and 20% for OPC 43 grade cement. As for PQC, flexural strength is optimized by designing thickness of slab for different percentage of RHA and compared with control mix, i.e. it is increased by 10.9% for M-RHA5 mix and then start decreasing for M-RHA10 by 3% as compared with control mix. For flexural strength optimum content for RHA in cement 5% i.e. M-RHA5 which will reduce the cost of construction for pavement quality concrete slab.