Water absorption of acid attacked specimen
The water absorption test was done 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 test was done as per ASTM C 642
(2006). 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 mmwater
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.