Combine Effect of Metakaolin, Fly Ash and Steel Fiber on Mechanical Properties of High Strength Concrete

Abstract

In this experimental study the changes on some mechanical properties of concrete specimens produced by Metakaolin, fly Ash and steel fibers were investigated. The main objective of this work is to obtain a more ductile high strength concrete produced by using Metakaolin, Fly Ash and Steel Fiber. Three types of steel fibers were used in the experiments and volume fractions of steel fiber were 0.5% to 4.0 %. Addition of metakaolin and fly ash into the concrete were 5 % and 10 % by weight of cement content respectively. Water/cement ratio was 0.27. Compressive strength and split tensile strength tests were made on hardened concrete specimens. The use of metakaolin increased mechanical strength of concrete. On the other hand, the addition of steel fiber into concrete improves ductility of high strength concrete significantly. Keywords-Compressive Strength, Fly Ash, High Strength Concrete (HSC), High Strength Fiber Reinforced Concrete (HSFRC), Metakaolin, Split Tensile Strength, Steel Fiber.