Title: Strains and Stresses of Concrete at Initiation of Cracking and Near Failure
Author(s): M. F. Kaplan
Publication: Journal Proceedings
Appears on pages(s): 853-880
Microcracking of concrete, in conventional short-time flexure, splitting, direct tension, and compression tests, was investigated using an electrical resistance strain gage technique. Cracking was found to occur at loads consider-ably less than those required to cause ultimate failure. Tensile stresses and strains, at cracking, depended on the voiume of coarse aggregate in the mix; the greater this volume, the lower the stresses and strains.The results suggest that the initiation of cracking may be more dependent on strain than on stress. Tensile and com pressive stresses and strains, at or near ultimate failure, may also be affected by the volume of coarse aggregate.