Durability and fire resistance of high-performance fiber reinforced concrete with fly ash

Abstract

ABSTRACT High-performance concrete (HPC) is currently widely utilised in the civil engineering and construction industry. The rising use of HPC in structural applications, as well as the necessity to justify fire resistance, has prompted numerous laboratories to research high-temperature characteristics. The relevant properties of HPC with polypropylene fiber (PPF) and fly ash (FA) were determined through an experimental study. This paper presents some key aspects related to compressive strength for High-Performance Fiber Reinforced Concrete (HPFRC) with and without FA at high temperatures ranging from 100°C to 800°C for use in fire resistance calculations. Visual investigation revealed a change in colour as the temperature rose. It may be used as a guide for maintaining, designing, and predicting the life of HPC structures, such as high-rise buildings that are exposed to high temperatures. Detailed research on the mechanical and durability characteristics like the workability of fresh concrete, as well as compressive strength, modulus of elasticity, drying shrinkage, water permeability, and sorptivity coefficient of hardened concrete containing PPF and FA is also reported in this paper. FA concentration in concrete mixtures was 0%, 10%, 20%, 30%, and 40% on a mass basis, with fibre volume fraction ranging from 0% to 0.3% on a volume basis.