超高性能混凝土-花岗岩石材界面的抗剪性能研究

doi:10.11896/cldb.24010107

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Abstract The excellent bonding property between UHPC(ultra-high performance concrete) and stone is the key to ensuring the reinforcement effect of existing stone structure buildings by UHPC. Therefore, in order to explore the interface shearing behavior between UHPC and stone, five groups of specimens with smooth surface, chisel treatment and different groove depths were investigated by push-off tests. Then, the failure model, load-slip curve, interfacial shear strength, and matrix strain of UHPC-stone specimens were studied. Based on the experimental results, the numerical simulation was carried out and the formula of shearing capacity was proposed. The results show that the interface grooves treatment could significantly improve the interface shear strength, change the failure model and effectively improve the ductility of specimens. The specimen shows better interface bonding strength and ductility when the groove depth is 20 mm. In addition, the strain development of UHPC matrix is similar to that of stone at the elastic deformation stage, which indicates that the both materials have better coordinated deformation ability at this stage. Through the verification of numerical simulation and calculation formula of interface bearing capacity, the load-slip curve, interfacial bon-ding strength and stress distribution from numerical simulation are in good agreement with these from experiment. In addition, the results of parameter analysis of different groove shapes show that the positive trapezoid treatment can improves the interface shear performance at groove depth of 10 mm and 20 mm. Compared with the existing formulas of shearing bearing capacity, the proposed formula can effectively predict the interface shear capacity of UHPC-stone.

Key words： ultra-high performance concrete (UHPC) stone surface treatment interface shear performance numerical simulation

Published: 25 March 2025 Online: 2025-03-24

CLC number:

TU528

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	Articles by authors
	WANG Yao
	ZHENG Xinyan
	HUANG Wei
	WU Yingxiong
	HUANG Yaying
	ZHANG Hengchun
	ZHANG Feng

Cite this article:

WANG Yao,ZHENG Xinyan,HUANG Wei, et al. Experimental Study on Interface Shear Behavior Between Ultra-high Performance Concrete and Granite Stone[J]. Materials Reports, 2025, 39(6): 24010107-10.

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https://www.mater-rep.com/EN/10.11896/cldb.24010107 OR https://www.mater-rep.com/EN/Y2025/V39/I6/24010107

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