Abstract:
Concrete, the widely used and cost-effective construction material, is vulnerable to degradation
by various acids found in ground water, sewage systems, industrial effluents, and acid rain.
This study highlights the impact of acid-induced degradation on concrete structures' long-term
resilience, emphasizing the need for enhanced durability and sustainability
This study investigates the degradation of Portland Pozzolana Cement (PPC) mortar
specimens exposed to acids commonly found in ground water, sewage systems, industrial
effluents, and acid rain. The specific focus is on the effects of citric acid and lactic acid at
concentrations of 0.25M, 0.5M, and 1M on the durability of PPC mortar specimens.
Degradation is assessed through mass loss, ultrasonic pulse velocity (UPV) tests, and
compressive strength evaluations. The research compares the traditional Static Immersion
method and the Accelerated Acid Abrasion Resistance Test (A3RT) to determine degradation
kinetics. Results indicate that prolonged acid exposure leads to increased degradation of PPC
mortar specimens. Citric acid shows higher degradation rates compared to lactic acid. The
findings emphasize the importance of acid concentration when assessing concrete durability in
acidic environments. This research provides valuable insights for designing and maintaining
concrete structures in acidic environments, enhancing their long-term resilience and
sustainability.
