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Influence of Rice Husk Ash Admixture on Key Perfomarnce Indicators of High Stregth and High Performance Concrete
MUST JOURNAL OF RESEARCH AND DEVELOPMENT,
Vol. 1 No. 4 (2020): Influence of Rice Husk Ash Admixture on Key Perfomance Indicators of High Stregth and High Performance Concrete
Abstract
The demand of tall structures, large span bridges and dams, and development of concrete technology such as pre-stressed concrete construction demanded high strength concrete. In line with strength, method of mixing and placing need a concrete with high performance in fresh and hardened state. These drive the need of ‘High Stregth, High Performance Concret’ in industries. This research explores the influence of ‘Rice Husk Ash’ on the key performance indicators of high stregth, high performance concret. The research investigated the key performance properties of high stregth, high performance concret. High stregth, high performance concret of 40 MPa incorporating 0%, 5%, 10% and 15% rice husk ash. Workability of high stregth, high performance concret was found to decrease as the amount of rice husk ash was increasing. The desired workability was from 30 to 60 mm, but the actual values achieved were 58mm for the control mix which decreased to 48 mm on addition of 10 % rice husk ash admixture. The compression and flexural strength obtained for the control concrete were 36.3 and 4.6 MPa respectively at 7 day curing period. The 28 day compressive strength of control concrete was 53.5 MPa but for the high stregth, high performance concret was 57.9 MPa achieved at an addition of 10 % rice husk ash admixture. The 7 and 28 day curing periods, the compressive and flexural strengths of concrete containing 10 % of rice husk ash admixture were better compared to the control concrete that incorporate 5% and 15% of rice husk ash. The compressive strength of 48.6 and 57.9 MPa achieved at 7 and 28 days respectively proved the potential of rice husk ash as admixture in the production of high stregth, high performance concret. Also rice husk ash attested the forth coming contribution to the sustainable development and economic success to the construction and agricultural industries.
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