INFLUENCE OF AGGREGATE TYPE ON THE DURABILITY OF CONCRETE MADE OF BLENDED CEMENTS WITH CALCEROUS FLY ASH

摘要

The influence of aggregate type on the compressive strength, the resistance to chloride penetration and the scaling resistance with de-icing salts of concrete made with blended cements with calcerous fly ash was investigated. The range of investigation included the air entrained concrete with water to cement ratio w/c=0.45 with the prototype-blended cements containing the additives of calcerous fly ash, siliceous fly ash and ground granulated blast furnace slag. Concrete specimens were cured during first 3 days in water and then in the air of 40% RH until 28 and 90 days. Frost-salt scaling tests were performed using 3% NaCl solution. The air void microstructure was quantitatively evaluated. The results revealed the influence of blended cement type on the properties of concrete with different type of aggregates.