INTRODUCTION
1.1 General
Conventional concrete (CC) is one of the most widely used construction
materials in the world other than water [1].Among construction materials,
the demanding for concrete is increasing day by day due to increasing developments in
the infrastructure. However, the usage of CC will be more, and as well as the demand
for ordinary Portland cement (OPC)also increases in the future. But the usage of
OPCmay cause severe environmental problems such as the greenhouse effect and global
warming etc., due to the production of CO2from cement in concrete