Effect of 12-hour fire on Flexural Behavior of Recyclable Aggregate Reinforced Concrete Beams
Fire being one of the hazards causes external and internal adverse effects on concrete. On the other hand, demolishing waste causes numerous environmental issues due to lack of proper disposal management. Therefore, this research work presents experimental evaluation of effect of 12-hur fire on flexural behavior of reinforced concrete beams made with partial replacement of natural coarse aggregates with coarse aggregates from demolished concrete. The model beams are prepared using both normal and rich mix. Natural coarse aggregates are replaced in 50% dosage. Also, the beams without recyclable aggregates are prepared to check the results of proposed beams. After 28-day curing all the beams are exposed to fire for 12-hour at 1000°C in purpose made oven, followed by testing in universal load testing machine under central point load. During the testing deflection, load, and cracks are monitored. Analysis of flexural behavior and cracking reveals that after 12-hour fire residual strength of the beams is 52%. This shows loss of the strength of reinforced concrete beams thus requires appropriate retrofitting decision before putting again the structure in service after fire. Observation of cracks shows that most of the beams failed in shear with minor flexural cracks. In comparison to the results of control specimen the proposed beams show good fire resistance. The outcome of the research will prove landmark for future scholars and help the industry personals in understanding the behavior of the material in fire.
Memon, Bashir Ahmed. "Recent development on use of demolished concrete as coarse aggregates." International Journal of Emerging Technology and Innovative Engineering 2, no. 1 (2016): 1-11. doi: 10.13140/RG.2.2.34109.92648.
Li, Wengui, Jianzhuang Xiao, Caijun Shi, and Chi Sun Poon. “Structural Behaviour of Composite Members with Recycled Aggregate Concrete — an Overview.” Advances in Structural Engineering 18, no. 6 (June 2015): 919–938. doi:10.1260/1369-43220.127.116.119.
Bhatti, Asif Ali, and Bashir Ahmed Memon. "Strength, Deflection and Cracking Behavior of Concrete Slab Using Demolished Concrete as Coarse Aggregates." (2014): 492-506. doi: 10.13140/RG.2.2.15654.98882.
Oad, M., and B. A. Memon. "Compressive Strength of Concrete Cylinders using Coarse Aggregates from Old Concrete." In 1st National Conference on Civil Engineering (NCCE 2013-14)-(Modern Trends and Advancements). April 28th – 29th, 2014. doi:10.13140/RG.2.2.20772.73602.
Naus, Dan J. “The Effect of Elevated Temperature on Concrete Materials and Structures - a Literature Review.”, US Nuclear Regulatory Commission, Office of Nuclear Regulatory Research, Washington, (March 1, 2006). doi:10.2172/974590.
Cree, D., M. Green, and A. Noumowé. “Residual Strength of Concrete Containing Recycled Materials after Exposure to Fire: A Review.” Construction and Building Materials 45 (August 2013): 208–223. doi:10.1016/j.conbuildmat.2013.04.005.
Vieira, J.P.B., J.R. Correia, and J. de Brito. “Post-Fire Residual Mechanical Properties of Concrete Made with Recycled Concrete Coarse Aggregates.” Cement and Concrete Research 41, no. 5 (May 2011): 533–541. doi:10.1016/j.cemconres.2011.02.002.
Marques, A.M., J.R. Correia, and J. de Brito. “Post-Fire Residual Mechanical Properties of Concrete Made with Recycled Rubber Aggregate.” Fire Safety Journal 58 (May 2013): 49–57. doi:10.1016/j.firesaf.2013.02.002.
Batayneh, Malek, Iqbal Marie, and Ibrahim Asi. “Use of Selected Waste Materials in Concrete Mixes.” Waste Management 27, no. 12 (January 2007): 1870–1876. doi:10.1016/j.wasman.2006.07.026.
Buller, A.H., and Memon, B.A., “Effect of Fire on Strength of Concrete Cubes with RCA as Coarse Aggregates”, 1st National Conference on Civil Engineering (NCCE 2013-14) - (Modern Trends and Advancements), April 28th – 29th, 2014. doi:10.13140/RG.2.2.10404.94086.
Dong, Hongying, Wanlin Cao, Jianhui Bian, and Jianwei Zhang. “The Fire Resistance Performance of Recycled Aggregate Concrete Columns with Different Concrete Compressive Strengths.” Materials 7, no. 12 (December 8, 2014): 7843–7860. doi:10.3390/ma7127843.
Wu, Bo, and Mingming Ji. “Fire Behavior of U-Shaped Steel Beams Filled with Demolished Concrete Lumps and Fresh Concrete.” Applied Sciences 8, no. 8 (August 13, 2018): 1361. doi:10.3390/app8081361.
Ahmad, Subhan, Pradeep Bhargava, and Ajay Chourasia. “Shear Transfer Capacity of Reinforced Concrete Exposed to Fire.” IOP Conference Series: Earth and Environmental Science 140 (April 2018): 012146. doi:10.1088/1755-1315/140/1/012146.
Sabeur, Hassen, Mickaël Saillio, and Julien Vincent. “Thermal Stability and Microstructural Changes in 5 Years Aged Cement Paste Subjected to High Temperature Plateaus up to 1000 °C as Studied by Thermal Analysis and X-Ray Diffraction.” Heat and Mass Transfer (March 1, 2019). doi:10.1007/s00231-019-02599-w.
Kigha, F, JA Sadeeq, and OS Abejide. “Effects of Temperature Levels and Concrete Cover Thickness on Residual Strength Characteristics of Fire Exposed Reinforced Concrete Beams.” Nigerian Journal of Technology 34, no. 3 (June 27, 2015): 429-437. doi:10.4314/njt.v34i3.1.
Sun, Rui, Bo Xie, Ricardo Perera, and Yongjun Pan. “Modeling of Reinforced Concrete Beams Exposed to Fire by Using a Spectral Approach.” Advances in Materials Science and Engineering 2018 (July 18, 2018): 1–12. doi:10.1155/2018/6936371.
Onundi, Lateef O., M. Ben Oumarou, and Abba M. Alkali. "Effects of Fire on the Strength of Reinforced Concrete Structural Members." American Journal of Civil Engineering and Architecture 7, no. 1 (2019): 1-12.
Xie, Qifang, Lipeng Zhang, Shenghua Yin, Baozhuang Zhang, and Yaopeng Wu. “Effects of High Temperatures on the Physical and Mechanical Properties of Carbonated Ordinary Concrete.” Advances in Materials Science and Engineering 2019 (February 17, 2019): 1–10. doi:10.1155/2019/5753232.
ASTM C 293-02, “Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Central Point-Loading”, ASTM, International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. doi:10.1520/c0293-02.
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