IJEP 42(12): 1517-1521 : Vol. 42 Issue. 12 (December 2022)
1. Raghu Engineering College, Department of Civil Engineering, Visakhapatnam – 531 162, Andhra Pradesh, India
2. Raghu Engineering College, Department of Mechanical Engineering, Visakhapatnam – 531 162, Andhra Pradesh, India
3. Dadi Institute of Engineering and Technology, Visakhapatnam – 531 002, Andhra Pradesh, India
Abstract
Due to the alkaline composition of concrete, it is vulnerable to acid assault. Globally, the socio-economic costs associated with infrastructure degradation as a result of acid assault reach billions of dollars. A controlled experiment was conducted to determine the most effective acid for immersion. Batch tests were performed to determine the effect of 2% H2SO4, 2% HNO3 and 2% HCl in acid immersion. It was observed that H2SO4 immersion resulted in the greatest loss of compressive strength in concrete and that HCl immersion resulted in the least loss of compressive strength. In batch tests, sand was substituted with 20%, 40% and 60% copper slag to determine the effect of copper slag on the strength of concrete in an acidic environment. It is found that copper slag concrete mixes exhibit a much lower percentage loss of compressive strength than standard concrete mixes throughout all durations of acid exposure. It was observed that the mass of compressive strength lost by conventional concrete is almost twice that of copper slag concrete after H2SO4 acid immersion. The findings indicated that copper slag concrete is acid resistant in terms of mass loss and compressive strength loss.
Keywords
Acid assault, Acidic environment, Reuse of copper slag
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