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Advances in Concrete Construction Volume 15, Number 3, March 2023 , pages 179-190 DOI: https://doi.org/10.12989/acc.2023.15.3.179 |
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Effect of polypropylene and glass fiber on properties of lightweight concrete exposed to high temperature |
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Abdulnour Ali Jazem Ghanim, Mohamed Amin, Abdullah M. Zeyad, Bassam A. Tayeh, Ibrahim Saad Agwa and Yara Elsakhawy
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| Abstract | ||
| The effect of glass fibres (GF) and polypropylene fibres (PPF) on the fresh properties and mechanical properties of lightweight concrete (LWC) exposed to high temperatures is investigated in this study. In this study, fifteen LWC mixtures were carried out in three different groups reinforced with PPF or GF fibers by 0%, 0.2%, and 0.4% by volume of concrete. The first group included aluminum powder (AP) as an air agent at 0.03% with the normal weight coarse aggregate (NWCA) by 100% of the weight of coarse aggregate. In the second group, 33% of the NWCA weight was replaced by lightweight coarse aggregate (LWCA). In the third group, 67% of the NWCA weight was replaced by LWCA. The slump, unit weight, Compressive strength (CS), tensile strength (TS), and flexural strength (FS) were examined. For two hours, the CS and FS were subjected to elevated temperatures of 200°C, 400°C, and 600°C, in addition to microstructure analysis of concrete. In comparison to the reference mixture, the fresh properties and bulk density of LWC decreased with the use of the air agent or the replacement of 67% of the NWCA with LWCA. As a result of the fiber addition, both the slump test and the bulk density decreased. The addition of fibers increased the CS; the highest CS was 38.5 MPa when 0.4% GF was added, compared to 28.9 MPa for the reference mixture at the test age of 28 days. In addition, flexural and TS increased by 53% and 38%, respectively, for 0.4% GF mixes. As well as, adding 0.4% GF to LWC maintained a higher CS than other mixtures. | ||
| Key Words | ||
| elevated temperatures; glass fibre; mechanical characteristics; microstructure; lightweight concrete; polypropylene fibre | ||
| Address | ||
| (1) Abdulnour Ali Jazem Ghanim: Department of Civil Engineering, College of Engineering, Najran University, Najran, Saudi Arabia; (2) Mohamed Amin, Ibrahim Saad Agwa: Civil and Architectural Constructions Department, Faculty of Technology and Education, Suez University, Egypt; (3) Abdullah M. Zeyad: Civil Engineering Department, College of Engineering, Jazan University, Jazan, Saudi Arabia; (4) Bassam A. Tayeh: Civil Engineering Department, Faculty of Engineering, Islamic University of Gaza, P.O. Box 108, Gaza Strip, Palestine; (5) Ibrahim Saad Agwa: Department of Civil Engineering, El-Arish High Institute for Engineering and Technology, El-Arish, North Sinai, Egypt; (6) Yara Elsakhawy: Civil Engineering Dept., Faculty of Engineering, Delta University for science and Technology, Gamasa, Egypt. | ||
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