Improvement of Concrete Durability By Complex Mineral Super- Fine Powder

Structure

KG powder is a complex mineral superfine powder made by grinding the mix of calcined coal gangue and slag along with fly ash, silica fume in certain proportion. The concrete cement content was reduced by 20% to 40%. Durability related properties include resistance to sulphate attack and acid rain was enhanced greatly. Application of complex mineral superfine powder is an effective way to reduce environment pollution and improve durability of concrete under severe conditions. When KG powder mix with concrete, it will increase the durability of concrete with improved pozzolanic reaction and micro-aggregate filling. As a result of this experimental study, it is noted that the use of 20%, to 40% replacement of KG powder instead of cement, has significant effect on compressive strength of concrete over time and will withstand sulfate attack and acid rain.

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