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This study investigates the effects of metakaolin on the fresh state and compressive strength of high strength self-compacting concrete. The particle parking model (PPM) was adopted for the mix design of concrete constituents. The prime rational was to eliminate void in the self-compacting concrete (SCC). Metakaolin was used to replace cement at three incorporation ratios of 5%, 10% and 15% at varying water to cementitious ratios of 0.25, 0.30, 0.35 and 0.40. Mixes were designed to achieve both selfcompatibility and high compressive strength. Several workability tests such as slump flow, Lbox, V-funnel and J-ring were carried out. The compressive strength was measured at 7, 14 and 28 days of wet curing. The results showed that the mix design method was adequate to proportion SCC mixtures containing cement and metakaolin. All fresh state properties satisfied EFNARC criteria (EFNARC, 2005). The highest compressive strength of 69.6 MPa was obtained for concrete using metakaolin. For all mixtures, metakaolin increased compressive strength appreciably. A similar trend was observed in all the concrete mixes and there was progressive increase in compressive strength as metakaolin inclusion level increased. Keywords—Self-Compacting Concrete, Metakaolin, Compressive Strength, Particle Parking Model, Water/Cement Ratio.

Workability and Mechanical Properties of High-Strength Self-Compacting Concrete Blended with Metakaolin