Influence of curing time on the chloride penetration resistance of concrete containing rice husk ash: A technical and economical feasibility study |
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| Authors: | ALG Gastaldini GC Isaia AP Saciloto F Missau TF Hoppe |
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| Affiliation: | 1. Climate Change and Adaptation Research Unit (CCARE), Faculty of Environment and Resource Studies, Mahasarakham University, Mahasarakham, Thailand;2. Joint Graduate School of Energy and Environment, King Mongkut''s University of Technology Thonburi, Bangkok, Thailand;3. Centre of Excellence on Energy Technology and Environment, PERDO, Bangkok, Thailand;1. Department of Civil Engineering, National College of Engineering, Tirunelveli, Tamil Nadu, India;2. Department of Civil Engineering, Sudharsan Engineering College, Sathiyamangalam, Pudukkottai, Tamil Nadu, 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. 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 |
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| Abstract: | This study investigates the influence of the curing time on the chloride penetration behavior of concrete produced with different concentrations of rice husk ash. Compressive strength and chloride penetration at 91 days were assessed according to ASTM C1202. Concentrations of 10%, 20% and 30% of rice husk ash were used and the results were compared with a reference mix with 100% Portland cement and with two other binary mixes with 35% fly ash and 50% ground blast furnace slag. Increases in rice husk ash content produced lower Coulomb charge values. Longer curing times reduced Coulomb charges values for all mixes investigated. However, the extent of the effect of curing times on compressive strength and chloride penetration in concrete is related to the type of mineral addition, the concentration of the substitutions used, the w/b ratio and the curing time used. This behavior points at an optimal curing period for each type of binder to meet specific technical and economical criteria, namely durability and compressive strength specifications for the structure. |
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