Influence of Metakaolin and Silpozz on Development of High-Strength Concrete

Abstract

Supplementary cementitious materials (SCM) have converted a fundamental part of high-strength and high-performance concrete. Using mineral admixtures as the replacement substance of cement in concrete has an affinity to increase by the future in order to provide greater sustainability in construction fields. This study investigates the coupled substitution of 20% of metakaolin (MK) and silpozz in ordinary Portland cement. This paper presents the influence of MK and silpozz on mechanical properties of concrete. Cement was partially replaced with up to 20% MK and silpozz with two types of w/b, i.e., 0.35 and 0.30. The test results revealed that substitution of MK and silpozz had significant effects on mechanical properties of high-strength concrete. For w/b 0.35, the concrete mix with 15% silpozz and 5% MK gave higher strength as compared to other mixes and exactly opposite combination gave increased strength for w/b 0.30. The strength of concrete appreciably increased in its early ages and also long-term strength can be achieved.