Title: Investigation of High Strength Concrete Behavior Made with Very High Percentages of Metakaolin and Steel Fibers
Author(s): Mohammed S. Eisa, Ahmed Ibrahim, and Olaniyi Arowojolu
Publication: Symposium Paper
Appears on pages(s): 33-49
Keywords: Steel fiber, Metakaolin, Compressive strength, Tensile strength and bond strength
High strength concrete (HSC) is considered a material which have been implemented in many construction applications. The effect of Metakaolin (MK) and steel fiber (SF) combinations on the mechanical properties of HSC was investigated in this paper. Concrete mixtures’ compressive strength split tensile strength and bond strength were evaluated. All mixtures were designed as a grade M60 with various levels of cement replacement with high percentages of MK (10%, 15%, 20%, 30%, 40%, and 50% by weight of cement) and steel fibers (0.25% and 0.50% by volume fraction). The results of this study were compared to the recent similar studies conducted, and it showed consistence conclusions. Test results revealed that a 15% of MK as replacement of cement showed the highest compressive and tensile strengths. Even with 50% of cement replacement with MK and SF, the mixtures showed good mechanical properties compared to the 100% cement concrete.