Cornpressive strength development of concretes containing ternary blended cements

摘要

This paper investigates the compressive strength development of concretes containing ternary blended cements; a combination of Portland cement, fly ash and metakaolin. The material costs and embodied carbon dioxide (e-CO_2) levels of these cements at the strength of 45 N/mm are included. The results suggest that metakaolin improves the compressive strength at both early and later ages, while fly ash contributes to the strength development at later ages. The concretes made with ternary blended cements have lower e-CO_2 levels than those made with Portland cement. The cost data suggest that at 45 N/mm~2 strength, economic concretes were possible when the level of metakaolin blending was kept at 5%.