Alkali-activated metakaolin: A short guide for civil Engineer – An overview

The development of new binders, as an alternative to Portland cement (PC), by alkaline activation, is a current researchers interest. Alkali-activated metakaolin (AAMK), belongs to prospective materials in the field of Civil Engineering. This paper presents a comprehensive overview of the previous works carried out on the use of MK in alkali activation.

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► AAMK system has better acid, seawater attack, sodium sulfate resistance than PC.
► AAMK system has very good heat resistant up to 1200–1400 °C.
► Polypropylene and short fibers increase AAMK flexural, strength and impact energy.
► Replacing 10% MK with FA or lime or 20% with calcite gave higher strength.
► MK and blended MK with steel slag can be used as repair materials.