The effectwater to binder(w/b) ratio parte type admixtures. num size(G..). sand contenu. and presence of mobure on the tensile strain aggregate capacity or cracking strain. of concrete were inves gated using Lexura est method. The invesiguion showed that the efectefcement type. paste content and sand centent in the tested ranges was not significant The cracking strain decreased with the increase ef te wb ratio, and replacement ratao Ly ash and mesione powder grcund granulated blast-furnace slag GGBS). specimens containing 30% and so% GGBs showed a higher cracking strain than that without GGBs, but at 70% GGBS, th crackrk decreased The cracking strain of concrete with a high wh ratio(wb-055) was the highest when G was 19 mm. However, when the wh ratio was 0.30, there was a tend ency that the cracking strain was the highest when was 10 mm. The cracking stain increased whereas the flexural strength and splitting tensile strength reduced when concrete was oven dned