Evaluation of bond strength between fire-damaged normal concrete substance and ultra-high-performance fiber-reinforced concrete as a repair material

Abstract

Purpose

This study aims to investigate and compare the interfacial bond characteristics between fire-damaged normal concrete substrate and ultra-high-performance fiber-reinforced concrete (UHPFRC) as a repair material.

Design/methodology/approach

First, fire-damaged normal concrete was prepared. Then, with a cast surface, the substrate was subjected to different surface moisture conditions. Three types of moisture conditions were set, namely, air dry, saturated surface dry (SSD) and wet. Slant shear and splitting cylinder tests were conducted to determine the interfacial bond strength of the composite.

Findings

In general, results indicate that surface moisture conditions significantly influence bond strength. The substrate under SSD condition exhibited the highest bond strength. The findings suggest that UHPFRC is a promising material for the repair and reuse of fire-damaged concrete structures.

Originality/value

This study compares the bond strength between fire-damaged normal concrete and UHPRC.

Citation

Baharuddin, N.K., Mohamed Nazri, F., Putra Jaya, R. and Abu Bakar, B.H. (2016), "Evaluation of bond strength between fire-damaged normal concrete substance and ultra-high-performance fiber-reinforced concrete as a repair material", World Journal of Engineering, Vol. 13 No. 5, pp. 461-466. https://doi.org/10.1108/WJE-06-2016-0014