Influence of Rice Husk Ash Admixture on Key Performance Indicators of High Strength and High Performance Concrete
Loading...
Date
2020-10-28
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Mbeya University of Science and Technology
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 Strength, High Performance Concrete’ in industries. This research explores the influence of ‘Rice Husk Ash’ on the key performance indicators of high strength, high performance concrete. The research investigated the key performance properties of high strength, high performance concrete. High strength, high performance concrete of 40 MPa incorporating 0%, 5%, 10% and 15% rice husk ash. Workability of high strength, high performance concrete 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 strength, high performance concrete 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 strength, high performance concrete. Also rice husk ash attested the forth coming contribution to the sustainable development and economic success to the construction and agricultural industries.
Description
This article was published by Mbeya University of Science and Technology Journal of Research and Development (MJRD) in 2020