Fracture Behavior and Toughness Evaluation of Shotcrete: A Closed-Form Approach.

Quan Zhang, Yihuan Xiao, Xiangyu Han, Bin Jia, Kai Zhang

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In one paragraph

Article in Materials (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

5 authors.

Quan ZhangSchool of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China.

Yihuan XiaoSchool of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China.

Xiangyu HanSchool of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China.

Bin JiaSchool of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China.

Kai ZhangCollege of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China.

Funding

National Natural Science Foundation of China 52004163National Natural Science Foundation of China 52208406National Natural Science Foundation of China 52274089Natural Science Foundation of Sichuan Province 2025ZNSFSC0030

6 · The paper itself

Abstract

Shotcrete, due to its excellent performance, has become widely adopted as a lining material in tunnel construction. However, research on the fracture behavior of shotcrete, especially in terms of precise fracture toughness determination methods, remains limited. In this study, three distinct batches of shotcrete with varying porosities were fabricated, and their fracture properties were evaluated using three-point bending tests. A closed-form solution was developed to calculate the fracture toughness of shotcrete used in tunnel linings, incorporating factors such as micro-structure, specimen boundaries, and geometry. The results demonstrated that the fracture toughness obtained through this method can be treated as a material constant, independent of specimen geometry. Additionally, the study emphasized the importance of considering the pore structure in the design and fracture analysis of shotcrete materials.

Indexed as

fracture toughnessgeometric effectpore structureshotcrete

Identifiers

PMID40508619

DOI10.3390/ma18112620

PMCPMC12156233

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