Hybrid Fiber Reinforced Cementitious Composites at Elevated Temperature: a Review

EasyChair Preprint 8908

Abstract

Fire affects the concrete mechanical properties negatively and can significantly damage the microstructure. This can lead to considerable loss to the structure and deterioration of concrete, due to explosive exposure spalling of internal structure prone to fire, melting, burning, and thermal expansion of fibers at higher temperatures. The mechanical properties affected due to fire include compressive strength, mass loss, durability, flexural strength, internal microstructure, and tensile strength. The incorporation of fibers can counterbalance the drawbacks of concrete when subjected to higher temperatures. Different studies had been conducted on various several types of concrete when exposed to elevated temperatures. The main aim of this paper is to review the different properties of Hybrid fiber reinforced concrete (HFRC) at an elevated temperature of 800℃. Mainly the hybrid fibers reviewed include the incorporation of Polypropylene fiber and Steel Fiber. The objective of the present study is to examine the effect of elevated temperature on concrete mechanical properties. The properties reviewed include tensile strength, Mass loss, Microstructure of concrete, and Compressive strength. There was a direct correlation between the mass loss and the increase in temperature. The residual compressive strength of HFRC is increased with the incorporation of fibers like Steel and Polypropylene. The tensile strength is improved up to 300℃ temperatures, but beyond 300℃, the tensile is affected negatively. The Microstructure is weakened due to heterogeneous expansion. The range of impacts of elevated temperature on the properties of HFRC has been discussed in detail in the present study.

Keyphrases: Hybrid fibre reinforced concrete, compressive strength, elevated temperature, mechanical properties, tensile strength

@booklet{EasyChair:8908,
  author    = {Ahmed Ali and Muhammad Saud Khan and Safeer Ullah Khattak},
  title     = {Hybrid Fiber Reinforced Cementitious Composites at Elevated Temperature: a Review},
  howpublished = {EasyChair Preprint 8908},
  year      = {EasyChair, 2022}}