Rice Husk Ash Case Study
In this study; the main purpose of using RHA is to utilize the agro waste. Rice husk ash is used as a replacement of cement at 0%, 5%, 7.5%, 10%, 12.5% and 15% in this mix. The grade of concrete is M40 cured under normal water and chemical. The Compressive strength are compared between the normal curing & chemical curing. A range of curing periods starting from, 7, 28 and 56 days are considered in the present study. The results of the Compressive strength 0.5% Sodium phosphate curing slightly decrease up to 7.5% RHA replacement of compressive strength. In 1% Sodium phosphate curing strengths will be very less.
Key Words: Rice husk ash, Compressive strength, Sodium phosphate etc…
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1. INTRODUCTION
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its simplest form concrete is a mixture of paste and aggregates. Rice husk material will be added and admixture to obtain concrete of desired property. The character of the concrete was determined by quality of the paste. In the ancient period, construction work was mostly carried out with help of mudstone from industry. Rice husk ash is the by product of burned rice husk at higher temperature from paper plant artificial fibers are commonly used now a days in order to improve the mechanical properties of concrete. Considerable efforts are being taken worldwide to utilize natural waste and bye product as supplementary cementing materials to improve the properties of cement concrete. Rice husk ash (RHA) with using Steel fiber is such materials. RHA is bye-product of paddy industry. Rice husk ash is a highly reactive pozzolanic material produced by controlled burning of rice husk. Rice milling generates a by product know as husk. This surrounds the paddy grain. During milling of paddy about 78 % of weight is received as rice, broken rice and bran .Rest 22 % of the weight of
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