Study on Partial Replacement of Cement by Rice Husk Ash Exposed To Phosphate Attack

HemaSekhar Reddy, M.N.S.R. Madhuri

Abstract


In this Investigation, the partially  replacement of cement with RHA at different percentages are 0%, 5%, 7.5%, 10%, 12.5% and 15% by weight. The mix is designed for M40 grade concrete with the proportions of 1:2.2:3.72.The tests conducted on Concrete like Compressive strength & Flexural strength and they are cured in both normal water & chemical solution for 7, 28 & 56 days. For chemical curing 0.5% & 1% concentrated Sodium phosphates were used and they are compared with normal curing results. The results was shown that, By comparing normal water curing with 0.5% phosphate exposure it was observed that, the compressive strength was gradually decreased with increase in RHA percentage. By comparing normal water curing with 1% phosphate exposure it was observed that, the compressive strength was highly decreases with increase in RHA percentage.


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