**3.1 Effect of hydrochloric (HCl) acid and magnesium sulfate (MgSO4) attack**

The effect of hydrochloric acid and magnesium sulfate attack on POC supplemented concrete was evaluated by [10]. The outcome proved that 30% POC addition minimizes concrete deterioration and loss in compressive strength when dipped in a HCl solution and a 30 MPa strength 90 days curing. The concrete

containing POC showed higher performance against deterioration, mass and strength loss. This could be due to low quantity of calcium hydroxide, well known as weak in acid attack resistance. However, when the concrete got exposed to MgSO4 attack, less micro-cracks were seen.
