EFFECT OF HIGH STRENGTH ADDITIVE ON REDUCTION OF ENVIRONMENTAL BURDEN

摘要

This paper discusses effect of a high strength additive on reduction of environmental burden from the viewpoint of LCA(Life Cycle Assessment). The CO_2 primary unit of the high strength additive consisting of industrial by-products amounts to be one order smaller figure compared to that of the cement, and the material itself is considered to be of low environmental burden. It is found that placing of high strength concrete is more effective in reducing environmental burden than repetitive placing of ordinary strength concrete, when highly durable concrete is required. It is revealed that production of high strength concrete by using high strength additive which produce ettringite, can reduce the unit weight of cement for the required design strength, and can reduce environmental burden.