Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Investigation on Fire Resistance of Concrete Incorporating Recycled Ceramic Fine Aggregate
The paramount importance of the fire resisting competency of a fire exposed concrete, which has a significant impact on civil engineering structures, has been an influential segment of this research work. In this study, it was investigated the performance of recycled ceramic fine aggregate (RCFA) incorporated concrete subjected to elevated temperature as a partial replacement for sand material. Different portions of RCCA were used with sand for preparing 8 working mix conditions, i.e., 5, 10, 15, 20, 25, 30, 35, and 40 wt%. A total of 135 cylinders were prepared (n = 15 for each group). 15 cylinders were prepared without any RCFA percentage for comparison. Cylinders were tested under compressive loading at certain temperatures (500, 600, 700, and 800 °C) after 28 days of curing. X-ray fluorescence (XRF) analyses were conducted on the corresponding samples to extract the chemical composition under elevated temperature. At 600 °C, concrete containing RCFA percentage of 40 wt% exhibited the best performance at high temperature, incurring an average strength loss of 30.87% compared to 33.86% strength loss in reference samples. The measured strength was noted to be retained by 4.78% more of the total strength for RCFA percentage of 40 wt% reference normal concrete samples, respectively under an elevated temperature range of 700–800 °C. Mixes with high contents of RCFA displayed better post-fire behavior, mostly because of the similarities between the coefficient of thermal expansion of RCFA, compared to the natural fine aggregates, the coefficient of thermal expansion of the mortar that induced less internal thermal stresses and less cracking at high temperatures and the intrinsic higher stability of the recycled ceramic aggregates at high temperature compared to natural fine aggregate.
Investigation on Fire Resistance of Concrete Incorporating Recycled Ceramic Fine Aggregate
The paramount importance of the fire resisting competency of a fire exposed concrete, which has a significant impact on civil engineering structures, has been an influential segment of this research work. In this study, it was investigated the performance of recycled ceramic fine aggregate (RCFA) incorporated concrete subjected to elevated temperature as a partial replacement for sand material. Different portions of RCCA were used with sand for preparing 8 working mix conditions, i.e., 5, 10, 15, 20, 25, 30, 35, and 40 wt%. A total of 135 cylinders were prepared (n = 15 for each group). 15 cylinders were prepared without any RCFA percentage for comparison. Cylinders were tested under compressive loading at certain temperatures (500, 600, 700, and 800 °C) after 28 days of curing. X-ray fluorescence (XRF) analyses were conducted on the corresponding samples to extract the chemical composition under elevated temperature. At 600 °C, concrete containing RCFA percentage of 40 wt% exhibited the best performance at high temperature, incurring an average strength loss of 30.87% compared to 33.86% strength loss in reference samples. The measured strength was noted to be retained by 4.78% more of the total strength for RCFA percentage of 40 wt% reference normal concrete samples, respectively under an elevated temperature range of 700–800 °C. Mixes with high contents of RCFA displayed better post-fire behavior, mostly because of the similarities between the coefficient of thermal expansion of RCFA, compared to the natural fine aggregates, the coefficient of thermal expansion of the mortar that induced less internal thermal stresses and less cracking at high temperatures and the intrinsic higher stability of the recycled ceramic aggregates at high temperature compared to natural fine aggregate.
Investigation on Fire Resistance of Concrete Incorporating Recycled Ceramic Fine Aggregate
Lecture Notes in Civil Engineering
Belayutham, Sheila (Herausgeber:in) / Che Ibrahim, Che Khairil Izam (Herausgeber:in) / Alisibramulisi, Anizahyati (Herausgeber:in) / Mansor, Hazrina (Herausgeber:in) / Billah, Muntasir (Herausgeber:in) / Mujib, Joarder Md. Sarwar (Autor:in) / Maruf Hasan, Md. (Autor:in) / Rasel Molla, Md. (Autor:in) / Zahid, Tahsin Md. (Autor:in) / Mustafy, Tanvir (Autor:in)
International Conference on Sustainable Civil Engineering Structures and Construction Materials ; 2020
07.04.2022
18 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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