The optimum content of rubber ash in concrete: flexural strength

[摘要] Discarded scrap tyres have become one of the major environmental problems nowadays. Several studies have been carried out to reuse waste tires as an additive or sand replacement in concrete with appropriate percentages of tire rubber, called as rubberized concrete to solve this problem. The main objectives of this study are to investigate the flexural strength performance of concrete when adding the rubber ash and also to analyse the optimum content of rubber ash in concrete prisms. The performance total of 30 number of concrete prisms in size of 100mm x 100mm x 500 mm were investigated, by partially replacement of rubber ash with percentage of 0%, 3%, 5%, 7% and 9% from the volume of the sand. The flexural strength is increased when percentage of rubber ash is added 3% from control concrete prism, RA 0 for both concrete prism age, 7 days and 28 days with value 1.21% and 0.976% respectively. However, for RA 5, RA 7 and RA 9, the flexural strength was decreased compared to the control for both age, 7 days and 28 days. In conclusion, 3% is the optimum content of rubber ash in concrete prism for both concrete age.

[发布机构] Jamilus Research Center, Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Johor Bahru Batu Pahat, Johor, Malaysia^1;Smart Driving Research Center, Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Johor Batu Pahat, Malaysia^2;School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Penang; 14300, Malaysia^3

[效力级别] 土木建筑工程

[关键词] Concrete age;Concrete prisms;Environmental problems;Rubberized concrete;Scrap tyres;Strength performance;Tire rubbers;Waste tires