When the energy performance of concrete is substantially higher than that of normal type concrete, such concrete is\nregarded as energy efficient concrete (WBSCSD 2009). An experimental study was conducted to investigate mechanical properties\nof energy efficient concrete with binary, ternary and quaternary admixture at different curing ages. Slump test for workability and\nair content test were performed on fresh concretes. Compressive strength, splitting tensile strength were made on hardened\nconcrete specimens. The mechanical properties of concrete were compared with predicted values by ACI 363R-84 Code, NZS\n3101-95 Code, CSA A23.3-94 Code, CEB-FIP Model, EN 1991, EC 2-02, AIJ Code, JSCE Code, and KCI Code. The use of silica\nfume increased the compressive strengths, splitting tensile strengths, modulus of elasticities and Poisson�s ratios. On the other\nhand, the compressive strength and splitting tensile strength decreased with increasing fly ash.
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