Abstract
This paper presents the results of a comparative study on the fracture properties of high-strength concrete (HSC) with normal aggregate (crushed limestone) and lightweight aggregate (sintered fly ash). The compressive strengths of the normal and lightweight HSC were about 115 and 90 MPa respectively. The fracture properties, namely the critical stress intensity factor [Formula: see text] and critical crack tip opening displacement (CTODC) for the two-parameter model, and the fracture energy (GF) for the fictitious crack model were examined. A three-point bending test on notched beams was carried out on specimens of varying sizes to examine the size effect on the measured properties and flexural behaviour. The experimental findings indicated that the [Formula: see text] and GF values of normal aggregate HSC were more size-sensitive than that of lightweight HSC while the CTODC of both types of HSC seemed to be size-independent. Compared with the normal aggregate HSC, the lightweight HSC had a considerably lower [Formula: see text] but had a similar GF and more ductile flexural behaviour.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
