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Implication of Metakaolin in Quarry Dust Concrete

M. Devi
Principal & Professor in Civil Engineering, Department of Civil Engineering, Paavai College of Engineering, Namakkal - 637018,Tamil Nadu, India

Abstract—The utilization of well graded, fines free quarry dust has been accepted as a building material in the construction industry in recent years and it has been used as an alternative material to river sand for fine aggregate. The use of supplementary cementitious materials such as fly ash, silica fume, slag and metakaolin in concrete improves workability, reduces the heat of hydration, minimizes cement consumption and enhances strength and durability properties by reducing the porosity due to the pozzolonic reaction. Metakaolin is a highly pozzolanic and reactive material. In this paper emphasize has been given to metakaolin as partial replacement of cement at 5%, 10%, 15% and 20% by weight of cement in concrete having quarry dust as fine aggregate. The effect of metakaolin on the strength properties was analyzed by conducting compressive, split tensile and flexural strength tests and durability properties were evaluated by impressed voltage measurement, rapid chloride penetration test (RCPT) and gravimetric weight loss measurement in addition to water absorption and bulk density analysis. The optimum percentage of metakaolin replacement was also determined.

Index Terms—concrete, quarry dust, metakaolin, strength, durability, corrosion resistance

Cite: M. Devi, "Implication of Metakaolin in Quarry Dust Concrete," International Journal of Structural and Civil Engineering Research, Vol. 4, No. 2, pp.171-174, May 2015. doi: 10.18178/ijscer.4.2.171-174