再生混凝土模型界面过渡区断裂行为与数值模拟

doi:10.11896/cldb.24080157

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Abstract The effects of water-cement ratio and carbonated aggregate on the fracture behavior of modelled interfacial transition zone (ITZ) in recycled aggregate concrete (RAC) were investigated using the three-point bending beam method, the prism specimenswere prepared with the size of 40 mm×40 mm×160 mm. Based on the cohesive zone model, the influence of crack height and interface strength on its fracture behavior was studied using a finite element software(ABAQUS). The results show that the load-displacement curve for fracture behavior of modelled ITZ consists of the ascending straight line segment, the ascending curve segment, and the descending curve segment. As the water-cement ratio increase from 0.40 to 0.50, the critical displacement and maximum load of modelled ITZ gradually decrease, while carbonated aggregate led to an increase in the maximum load by 64.40%, 37.26%, 32.02% respectively. As the crack height increases from 0 mm to 16 mm, the critical displacement of the load-displacement curve gradually increases, while the maximum load and unstable toughness gradually decrease, and the increase ratio of these three indices gradually decreases between adjacent crack heights and interface strengths. By contrast, as the interface strength increases from 0.6 MPa to 2.8 MPa, the changing trends of these three indices were opposite to those of the crack height increase.

Key words： interfacial transition zone (ITZ) fracture behavior load-displacement curve unstable toughness carbonated aggregate cohesive zone model ABAQUS

Published: 25 September 2025 Online: 2025-09-11

CLC number:

TU528.59

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	Articles by authors
	WU Jun
	DING Yahong
	GUO Meng
	GUO Shuqi

Cite this article:

WU Jun,DING Yahong,GUO Meng, et al. Fracture Behavior and Numerical Simulation of Modelled Interfacial Transition Zone in Recycled Aggregate Concrete[J]. Materials Reports, 2025, 39(18): 24080157-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24080157 OR https://www.mater-rep.com/EN/Y2025/V39/I18/24080157

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