enhance strength properties.Malhotra and Mehta [13] have reported that SCMs utilization provides a sustain able way of
disposing waste-byproducts via concrete applications.The application of SCMs in concrete could replace between 20 and
30% of Portland cement and this leads to a significant reduction of harmful anthropogenic gases such as carbon dioxide,NOx
and SO3 produced from the production of cement [14]. It is stated in the work of Yang [15] that one most practical means of
producing economical concrete is through the use of SCMs.The most widely used SCMs are industrial by-products which
include slag from pig iron production, fly ash from coal combustion plants,and silica fume form ferrous producing plants
[12]. Metakaolin produced from high purity kaolin clays at temperatures from 600 to 900 C are recently introduced SCMs
into the world of concrete formation [8,10].