Mechanical and Durability Properties of High-Performance Concrete Incorporating Fibers and Algerian Natural Pozzolans in Chloride Attack

Lyes Chalah; Aissa Talah; Youcef Ghernouti

doi:10.46604/ijeti.2022.9086

Authors

Lyes Chalah Department of Structures and Materials, Built Environmental Research Laboratory, University of Sciences and Technology Houari Boumediene (USTHB), Algeria
Aissa Talah Department of Structures and Materials, Built Environmental Research Laboratory, University of Sciences and Technology Houari Boumediene (USTHB), Algeria
Youcef Ghernouti Department of Civil Engineering, Research Unit: Materials, Processes and Environment, University M’Hamed Bougara of Boumerdes, Algeria

DOI:

https://doi.org/10.46604/ijeti.2022.9086

Keywords:

concrete, natural pozzolan, fibers, durability properties, chloride attack

Abstract

This study aims to assess the effect of sodium chloride attack on the mechanical and durability properties of high-performance concrete (HPC) based on fibers and natural pozzolans. The resistance of specimens against chemical attack is determined by the unit weight, compressive strength, splitting-tensile strength, chloride ion permeability, apparent gas permeability, and visual inspection after 28, 90, 180, and 365 days of testing. A total of three types of concrete are assessed: reference concrete (RC), HPC, and high-performance fiber-reinforced concrete (HPFRC) stored in tap water and aggressive water (i.e., a 10% NaCl solution). The test results demonstrate that the presence of fibers negatively affects the permeability of HPC. However, HPC and HPFRC remain stable and are not influenced by the NaCl solution compared to RC. The natural pozzolans attenuate the side effect of fibers by occupying voids (i.e., the filler effect) and generating denser products (i.e., the pozzolanic reaction) in the cement matrix.

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