Evaluating the effect of fibre on the crack growth of fibre-reinforced roller compacted concrete using two-parameter fracture model

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Rooholamini HAMED

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Journal Paper

Paper Information

Journal: JOURNAL OF TRANSPORTATION RESEARCH Year:2022 | Volume:19 | Issue:2 Page(s): 233-248

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Information Journal Paper

Title

Evaluating the effect of fibre on the crack growth of fibre-reinforced roller compacted concrete using two-parameter fracture model

Author(s)

Rooholamini HAMED | Issue Writer Certificate

Keywords

Roller compacted concrete pavement

Fibre

Two-parameter fracture model

crack kink angle

Image processing

Abstract

Roller compacted concrete pavement (RCCP) is a zero-slump and stiff-dry mixture which is usually placed with an asphalt paver and compacted by conventional vibratory roller compactors to achieve the required density. RCCP consistently has a slightly lower cement content than conventional concretes of similar strength. Nowadays, RCCP is used for any type of industrial or heavy-duty pavement and has advantages including cost saving as a result of the construction method and the increased placement speed of the pavement. Therefore, the use of RCCP pavement has become more and more popular in recent years. There are numerous studies on the mechanical properties of Fibre reinforced focused on cement paste and normal concrete. However, our understanding of what exactly happens when hybrid Fibres used to reinforce RCCP mixes with respect to fracture toughness is quite limited. Accordingly, in this study, three point bending test was carried out on mono and hybrid Fibre-reinforced RCCP based on modified two-parameter model to determine the value of Mode I plane-strain fracture toughness of Fibre-reinforced RCCP by considering possibility of crack deflection during its propagation through modified Two-parameter fracture model. Finally, it can be observed that, for great amount of fracture angle, the application of Two-parameter fracture model instead of modified Two-parameter fracture model cause to an overestimation of the fracture toughness values.

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