This paper examines the influence of different aggregate size distributions on the fracture behaviour of high strength concrete. Three-point bend test was performed on 63 notched beams casted using three aggregate size distributions and two water to binder ratios. The total fracture energy, GF, and critical stress intensity factor, KIC, were used to determine the fracture characteristic of concrete. The results show that the values of GF decrease substantially with increasing coarseness of aggregate grain structure, λ. Values of KIC also decreased but demonstrated only limited dependence on λ. In contrast, reducing the total w/b ratio substantially increases the value of KIC but had no measurable effect on GF.
Bibliographical note© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Aggregate size distribution
- Aggregate grading
- Fracture energy
- Stress intensity factors
- Size effect
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- School of Arch, Tech and Eng - Associate Dean Education and Student Exp
- Centre for Earth Observation Science
- Construction Engineering and Management Research and Enterprise Group
- Sustainability and Resilience Engineering Research and Enterprise Group
- Advanced Engineering Centre