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Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength

This paper investigates the bond failure performance between precast normal concrete (NC) and cast-in situ ultra-high performance concrete (UHPC), emphasizing the influence of interfacial roughness. The interfacial bonding behavior under tension and under shear was investigated based on 72 groups of...

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Detalles Bibliográficos
Autores principales: Zhang, Boshan, Yu, Jiangjiang, Chen, Weizhen, Liu, Hang, Li, Heng, Guo, Hong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10095793/
https://www.ncbi.nlm.nih.gov/pubmed/37049000
http://dx.doi.org/10.3390/ma16072708
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author Zhang, Boshan
Yu, Jiangjiang
Chen, Weizhen
Liu, Hang
Li, Heng
Guo, Hong
author_facet Zhang, Boshan
Yu, Jiangjiang
Chen, Weizhen
Liu, Hang
Li, Heng
Guo, Hong
author_sort Zhang, Boshan
collection PubMed
description This paper investigates the bond failure performance between precast normal concrete (NC) and cast-in situ ultra-high performance concrete (UHPC), emphasizing the influence of interfacial roughness. The interfacial bonding behavior under tension and under shear was investigated based on 72 groups of pull-off tests and 36 groups of bi-shear tests, considering six different interface treatment methods and two different NC strength levels. The results demonstrate that certain interfacial roughness is essential to gain a reliable bond connection between NC and UHPC. Its enhancement on the tensile bond performance could be described by the positive linear relationship between the mean roughness and the pull-off strength. However, further research is required to determine the characterization method of its influence on the shear bond performance. The higher strength of the base concrete is beneficial to the bond performance. Though this effect is evident in the pull-off tests under tension, the influence on the shear interfacial performance could be offset by that of the interface morphology in the case with high interfacial roughness.
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spelling pubmed-100957932023-04-13 Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength Zhang, Boshan Yu, Jiangjiang Chen, Weizhen Liu, Hang Li, Heng Guo, Hong Materials (Basel) Article This paper investigates the bond failure performance between precast normal concrete (NC) and cast-in situ ultra-high performance concrete (UHPC), emphasizing the influence of interfacial roughness. The interfacial bonding behavior under tension and under shear was investigated based on 72 groups of pull-off tests and 36 groups of bi-shear tests, considering six different interface treatment methods and two different NC strength levels. The results demonstrate that certain interfacial roughness is essential to gain a reliable bond connection between NC and UHPC. Its enhancement on the tensile bond performance could be described by the positive linear relationship between the mean roughness and the pull-off strength. However, further research is required to determine the characterization method of its influence on the shear bond performance. The higher strength of the base concrete is beneficial to the bond performance. Though this effect is evident in the pull-off tests under tension, the influence on the shear interfacial performance could be offset by that of the interface morphology in the case with high interfacial roughness. MDPI 2023-03-28 /pmc/articles/PMC10095793/ /pubmed/37049000 http://dx.doi.org/10.3390/ma16072708 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Boshan
Yu, Jiangjiang
Chen, Weizhen
Liu, Hang
Li, Heng
Guo, Hong
Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength
title Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength
title_full Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength
title_fullStr Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength
title_full_unstemmed Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength
title_short Experimental Study on Bond Performance of NC-UHPC Interfaces with Different Roughness and Substrate Strength
title_sort experimental study on bond performance of nc-uhpc interfaces with different roughness and substrate strength
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10095793/
https://www.ncbi.nlm.nih.gov/pubmed/37049000
http://dx.doi.org/10.3390/ma16072708
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