Effects of reactivity metakaolin on properties of high strength concrete








High Strength Concrete, Met Kaolin, Compressive Strength, Flexural Strength.


Reactivity Metakaolin (MK) is an engineered pozzolanic mineral admixture, reacts aggressively with calcium hydroxide, which results in significant performance of concrete.

In this work, different aspects of concrete mechanical behaviors have been studied including compressive and flexural strengths. In addition, some characteristics of concrete durability were investigated including absorption and porosity.

In mixture proportioning, 5% and 10% of cement content is replaced by MK it was observed that concrete with 5% and 10% MK would perform almost the same in improving the mechanical properties of the materials. However In term of workability and durability, a better performance was obtained in concrete with MK. All mixes compressive strength is determined at 7 and 28 days. Current experimental study shows that 10% replacement of cement by Metakaolin gives higher strength.




[1] A. Bentur, Cementitous Materials-nine Millennia and a New Century: past, present and future, Journal of Materials in Civil Engineering 14 (2002) 213-235. https://doi.org/10.1061/(ASCE)0899-1561(2002)14:1(2).

[2] C. Holland, D. Eng. FACI, High Performance Concrete, Reprinted from Concrete Products, 1993.

[3] American Society for Testing and Material, C363.2R-98, Guide to Quality Control and Testing of High-Strength Concrete.

[4] A. M Neville, Properties of Concrete, Fourth Edition, Longman group, publishers, 1995.

[5] M. A. Caldarone, K. A. Gruber and R.G. Burg, High Reactivity Metakaolin, A New Generation Mineral Admixture, Concrete International 16 (1994) 37-40.

[6] Iraqi Specifications, Portland cement, No 5 1984.

[7] American Society for Testing for material, C311-02, Sampling and Testing Fly ash or Natural Pozzolanas for use in Portland-cement concrete.

[8] ASTM C494 / C494M – 17, Standard Specification for Chemical Admixtures for Concrete.

[9] American Society for Testing and Material, C192-02, Making and curing concrete test specimens in the laboratory.

[10] American Society Testing and Material, C109-02, Compressive Strength of Hydraulic Cement Mortars.

[11] American Society for Testing and Material, C642-97, Density Absorption, and Voids in Hardened Concrete.

[12] American Society for Testing and Material, C78-02, Flexural Strength of Concrete (using Simple Beam with Third-Point Loading).

[13] ASTM C293 / C293M – 16, Standard Test Method for Flexural Strength of Concrete (Using Simple Beam with Center-Point Loading).

[14] S. Al-Jabari and K.T. Maki, Effect of the degree of softness of the Pozzolana on the physical properties of the Pozzolanic Cement, Building Research Center, Scientific Research Foundation, Ministry of Higher Education and Scientific Research, Republic of Iraq, October 1974.

[15] F. Norman, P. Eng. Macleod, ON the use of Supplementary Cementing Materials (SCMS) In Concrete Pavement applications, Canada, March 2005.

View Full Article: