Investigation The Properties Of Concrete Containing Rice Husk Ash To Reduction The Seepage In Canals.

In this research effect of rice husk ash (RHA) on Fresh and Hardened Properties of concrete which used to reduction the seepage in the canal lining was studied. To establish the suitable proportion of RHA for the partial replacement of cement, Concrete specimens was molded with 10%, 20%, and 30% of (RHA) replacing the cement, and measured it to workability, compressive strength, splitting tensile strength, dryings shrinkage, The results were compared with the concrete mix that does not contain RHA. The obtained results indicated that it was a significant reduction of workability in fresh concrete with the increase amount of RHA content in concrete, and it was an increase in the compressive strength and splitting tensile strength by increased of RHA% until 20% , The maximum increment is around 10.5%and 11% for the compressive strength and splitting tensile strength respectively then it were decrease with the increase of RHA to 30%, the decrease was around 17 % and 10.5% for compressive strength and tensile splitting strength respectively. The test of drying shrinkage indicated that it was decreased with increased of RHA%, the maximum decreased given by 30% RHA it was about 28% of normal concrete shrinkage after 90 days age. Key word: Concrete properties, Rice Husk Ash, Seepage, canal. ————————————————————