CORROSION OF STEEL IN EMBEDDED CONCRETE WITH VOLCANIC AGGREGATES DUE TO SULFATE ATTACK

The experimental tests conducted helps to study the concrete properties of volcanic concrete systems with granite replacement of river sand. The test results show that granite rock aggregates is an alternative construction material to river sand with a beneficial effect of reduced permeability properties. Compression strength, Corrosion potential and polarization resistance test results give an impression that 30% river sand replacement in volcanic concrete system is more resistant to sulfate attack as compared to same systems with no replacement. The reduced permeability property of concrete system could lead to reduced chances of corrosion of steel in reinforced concrete structures hence to increased durability of structures.