The saturated surface dry weight of concrete specimens
immersed in sulphuric acid solution was determined after a light
surface brushing and washing them lightly in tap water. Weight
measurement was done after 28, 56, and 84 days of immersion in
acid. The variation in weight was compared with the initial weight
before immersion in acid solution. The compressive strength of acid
attacked specimen was determined after 28, 56 and 84 days of
immersion in acid solution. The cube specimen was placed on the
compression testing machine in such a manner that the load was
applied to the opposite side of cubes as cast (not to the top and
bottom.) The load was applied without shock and increased gradually
at a rate of 140 kg/sq cm/min until the resistance of the
specimen breaks down to a stage where no greater load can be
sustained. It was compared with the compressive strength of
normal concrete (non-acid attacked), which was water cured for 28
days after casting (as given in Thomas et al., 2014) and the percentage
loss in weight was reported.