AN IVESTIGATION ON MECHANICAL PROPERTIES AND DAMAGE OF NORMAL CONCRETE AND MORTARS SUBJECTED TO MAGNESIUM SULPHATE ENVIRONMENT

Abstract

Concrete, is one of the key construction material having good compressive and durable properties among others. Sulphate attack is one of the most important problems affecting concrete structures, especially Magnesium Sulphate (MgSO4) attack. An investigation on the mechanical properties and damage evolution of OPCC exposure to MgSO4 environment. Then I’m collected some information about sulphate and their concentrations in kadapa region, by reference of those concentrations I was prepared MgSO4 solution with different percentages like 1%, 3% and 5% and were casted specimens was exposed for a period of 7, 14, 28, 56 and 90 days. There by parameters compressive strength test, NDT will be investigated at various erosion times of 7, 14, 28, 56 and 90 days. NDT such as UPV and Rebound Hammer strength tests will be performed to evaluate the strength characteristics and also damage characteristics. A relationship between damage and UPV of OPCC was derived according to damage mechanics and a correlation between the damage exposed to sulphate environment by using UPV and Rebound Hammer test. The OPCC performance evaluation under MgSO4 environment exposure conditions will be done by studying relations. Finally correlated an relation between compressive strengths obtained from DT and NDT tests