Fracture energy and softening behavior of high-strength concrete

Rao, Appa G and Prasad, Raghu BK (2002) Fracture energy and softening behavior of high-strength concrete. In: Cement and Concrete Research, 32 (2). 247-252 .

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Abstract

An experimental investigation on the fracture properties of high-strength concrete (HSC) is reported. Three-point bend beam specimens of size 100 x 100 x 500 mm were used as per RILEM-FMC 50 recommendations. The influence of maximum size of coarse aggregate on fracture energy, fracture toughness, and characteristic length of concrete has been studied. The compressive strength of concrete ranged between 40 and 75 MPa. Relatively brittle fracture behavior was observed with the increase in compressive strength. The load-CMOD relationship is linear in the ascending portion and gradually drops off after the peak value in the descending portion. The length of the tail end portion of the softening curve increases as the size of coarse aggregate increases. The fracture energy increases as the maximum size of coarse aggregate and compressive strength of concrete increase. The characteristic length of concrete increases with the maximum size of coarse aggregate and decreases as the compressive strength increases, (C) 2002 Elsevier Science Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Cement and Concrete Research
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Aggregate;Concrete;Compressive strength;Fracture toughness; Silica fume
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	19 Jul 2011 06:18
Last Modified:	19 Jul 2011 06:18
URI:	http://eprints.iisc.ac.in/id/eprint/39214

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