Improvement of Durability of Concrete by Complex Mineral

Abstract

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.