Effect of elevated temperature of hybrid fibres on the mechanical performance of cement mortar

• Main Authors: Nur Nabila Syazwani, Marsidi, Chin, Siew Choo
• Format: Conference or Workshop Item
• Language: English; English
• Published: Elsevier Ltd 2023
• Subjects: TA Engineering (General). Civil engineering (General); TH Building construction
• Online Access: http://umpir.ump.edu.my/id/eprint/42402/1/Effect%20of%20elevated%20temperature%20of%20hybrid%20fibres_ABST.pdf; http://umpir.ump.edu.my/id/eprint/42402/2/Effect%20of%20elevated%20temperature%20of%20hybrid%20fibres.pdf; http://umpir.ump.edu.my/id/eprint/42402/; https://doi.org/10.1016/j.matpr.2023.09.116
• Institution: Universiti Malaysia Pahang Al-Sultan Abdullah

Exposure to fire can cause significant damage to concrete structures that use cement as a binding material, which in turn can affect their stability. However, there has been less research into the fire-induced damage of concrete mixed with natural materials such as basalt and bamboo fibres. Therefore, the purpose of this study is to investigate how elevated temperatures affect cement mortar containing basalt fibre, bamboo fibre, and a combination of the two, and to determine the mechanical properties of different percentages of hybrid fibre concrete in terms of compressive strength and flexural tensile strength. Cement mortar blocks and prisms were prepared with and without fibres, and basalt fibres ranging from 0.1% to 0.5% were added to cement mix containing 0.5% of bamboo fibres. The strength of the mortar was then determined after being exposed to temperatures ranging from 400 to 1000 °C for 2 h, following a curing period of 28 days. Both the compressive and flexural strengths reduced significantly after the specimen was subjected to heating, especially at temperatures ≥ 800 °C. The results indicate that the mortar containing 0.1% basalt fibre and 0.5% bamboo fibre exhibits the highest fire resistance, with the highest compressive strength even after being heated to 1000 °C. Overall, the combination of basalt and bamboo fibres demonstrates greater strength compared to specimens containing only a single fibre after exposure to elevated temperatures.