Abstract

Synthetic fibers are among the various types of fibers being used to improve the tensile behavior of concrete. They have a competitive edge over other fibers because they are resistant to most chemicals, which increases the durability. Acid attacks are one of the most threatening scenarios, especially for concrete sewer pipes and culverts. In this study, dry cast concrete cylinders, reinforced with two different volume fractions (0.52 % and 1.04 %) of polypropylene fibers, were constructed and immersed for four months in sulfuric acid solutions of two different pH and three different temperatures. The results showed that a fiber volume fraction of 1.04 % reduces the adverse effects of acid on the compressive strength of concrete, and higher temperatures and lower pH lead to extreme deterioration. The results of this study revealed that a pH of 2.5, along with the highest temperature, deteriorated the specimens more than twice as much as a pH of 4.5 at the lowest temperature.

Issue Section:
Technical Papers
Keywords:
synthetic fibers, acid deterioration, temperature effect, compressive strength, pH

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