Abstract
The purpose of this study was to experimentally investigate the effects of cracking on the modulus of rupture (MOR) of concrete. When a structural member (e.g. column member) is subjected to dynamic loading, the tensile and compressive parts are interconverted on each stress reversal. The cracks may initiate in the tensile part due to the cyclic loading depending on the magnitude of stresses. Such understanding is critical in understanding the overall effects of cyclic loading on the building and on the strength of concrete. In this paper, the effect of such cracks on MOR were studied by conducting detailed laboratory tests. Reinforced beams were prepared by using three different concrete mix designs. The center point load flexural tests on beams were conducted by producing initial cracks in the tension zone and then switching the cracked tensile zone into compressive zone to study the effects of cracks on the MOR. The MOR of cracked and uncracked beams were compared. The experimental results shown that the cracks had no pronounced effect on MOR.
Zarak Khan Kasi, Saeedullah Jan Mandokhail, Nawaz Ali Kakar, Marjan Gul Kakar, Meer Hamza Khan Jogezai. (2018) The Effects of Cracks on the Modulus of Rupture of Concrete, Journal of Applied and Emerging Sciences, Volume 8, Issue 1.
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