Assessment of the effects of rice husk ash particle size on strength,water permeability and workability of binary blended concrete |
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| Affiliation: | 1. Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43300 UPM Serdang, Selangor, Malaysia;3. Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43300 UPM Serdang, Selangor, Malaysia;1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, China;2. Department of Civil Engineering, University of Guilan, Rasht, Iran;3. Department of Civil Engineering, University of Birjand, Birjand, Iran;4. Department of Civil Engineering, Islamic Azad University-UAE Branch, Dubai, United Arab Emirates;1. 131 Lowry Hall, Glenn Department of Civil Engineering, Clemson University, Clemson, SC 29634, USA;2. 220 Lowry Hall, Glenn Department of Civil Engineering, Clemson University, Clemson, SC 29634, USA;1. Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla, Sambalpur, Odisha 768018, India;2. Department of Civil Engineering, National Institute of Science and Technology, Palur Hills, Brahmapur, Odisha 761008, India;3. Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India;1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;3. Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China;1. Sustainable Construction Materials and Building Systems (SUCOMBS) Research Group, Faculty of Engineering & Built Environment, University Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Dhaka University of Engineering and Technology (DUET), Gazipur, Bangladesh;3. Department of Civil Engineering, Infrastructure University Kuala Lumpur, Kajang-4300, Selangor, Malaysia |
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| Abstract: | This study develops the compressive strength, water permeability and workability of concrete by partial replacement of cement with agro-waste rice husk ash. Two types of rice husk ash with average particle size of 5 micron (ultra fine particles) and 95 micron and with four different contents of 5%, 10%, 15% and 20% by weight were used. Replacement of cement up to maximum of 15% and 20% respectively by 95 and 5 μm rice husk ash, produces concrete with improved strength. However, the ultimate strength of concrete was gained at 10% of cement replacement by ultra fine rice husk ash particles. Also the percentage, velocity and coefficient of water absorption significantly decreased with 10% cement replacement by ultra fine rice husk ash. Moreover, the workability of fresh concrete was remarkably improved by increasing the content of rice husk ash especially in the case of coarser size. It is concluded that partial replacement of cement with rice husk ash improves the compressive strength and workability of concrete and decreases its water permeability. In addition, decreasing rice husk ash average particle size provides a positive effect on the compressive strength and water permeability of hardened concrete but indicates adverse effect on the workability of fresh concrete. |
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