Shear transfer behavior between substrate recycled aggregate concrete and new natural aggregate concrete
Kaihua Liu
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China
Search for more papers by this authorChaoying Zou
Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, China
Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
Search for more papers by this authorCorresponding Author
Jiachuan Yan
Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, China
Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
Correspondence
Jiachuan Yan, Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China.
Email: [email protected]
Search for more papers by this authorKaihua Liu
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China
Search for more papers by this authorChaoying Zou
Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, China
Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
Search for more papers by this authorCorresponding Author
Jiachuan Yan
Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, China
Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, China
Correspondence
Jiachuan Yan, Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China.
Email: [email protected]
Search for more papers by this authorFunding information: National Key Technologies Research and Development Program of China, Grant/Award Number: 2017YFC0703304; National Natural Science Foundation of China, Grant/Award Number: 51978205
Abstract
This paper investigated the shear transfer behavior between substrate recycled aggregate concrete and new natural aggregate concrete. A total of 72 push-off tests with substrate-to-new concrete specimens were performed considering the effects of concrete strength grade, replacement ratios of recycled coarse aggregate, and lateral constraints ratios. Existing design codes and empirical models for calculating shear strength were reviewed and verified. Results show that concrete cracks occurred and developed along the shear transfer plane. Increasing the concrete grade and lateral constraints can both improve the crack stress and shear strength, while the incorporation of recycled coarse aggregate has a slight adverse effect on them. The model in fib Model Code 2010 based on shear-friction theory gave the most accurate but still conservative values compared with experimental results and can be used to predict the shear transfer behavior between substrate recycled aggregate concrete and new natural aggregate concrete.
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