taken as a medium for acid resistance test. Concrete specimens of
100 mm size were immersed in a container with dilute sulphuric
acid solution. The solution was replaced once in 4 weeks. Three
different tests were done on acid attacked specimens. Water absorption
test was performed ASTM C 642 (2006) to study the
changes in porosity of concrete due to acid attack. The concrete
specimens were tested for water absorption after 28, 56 and 84
days of immersion in dilute sulphuric acid. The specimens were
oven dried at 60 C for 3 days and then kept at room temperature
for at least 1 day (24 h) and initial weight noted. Then it was
immersed in water such that about 50 mm water was maintained
on the top surface of the specimen. Then the final weight was noted
after 48 h. The values were compared with the water absorption
values of the non-acid attacked specimens.