Bonding performance between high-performance concrete and normal strength concrete based on splitting-tensile test：Effect of size and substrate surface roughness

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-10-14 DOI:10.1016/j.conbuildmat.2025.144025

Zhenhao Mao , Huigang Xiao , Yiming Lu , Siyuan Chen , Min Liu , Hongwei Deng

{"title":"Bonding performance between high-performance concrete and normal strength concrete based on splitting-tensile test：Effect of size and substrate surface roughness","authors":"Zhenhao Mao , Huigang Xiao , Yiming Lu , Siyuan Chen , Min Liu , Hongwei Deng","doi":"10.1016/j.conbuildmat.2025.144025","DOIUrl":null,"url":null,"abstract":"<div><div>The study investigates the influence of substrate surface roughness and size effect on the bonding performance of high-performance concrete (HPC) and normal strength concrete (NSC). The bonding performance of the composite specimens was evaluated by splitting tensile strength and DIC technology was employed to monitor crack development. Furthermore, the size effect mechanism of tensile bonding strength considering the influence of surface roughness was revealed combined with microscopic experiments. Results show that the combination of 3D scanning and digital image processing methods enabled a comprehensive evaluation of substrate roughness from both local and overall feature dimensions. The increase in substrate roughness will only significantly improve the repair effectiveness within a certain range. The optimal repair effectiveness can reach up to 194.08 %. Specimens with smooth surface showed single crack propagation path with gradual strain evolution, whereas specimens with rough surfaces exhibited tortuous crack paths with abrupt strain surges. In addition, the size effect of ordinary concrete was dramatically smaller than that of composite specimen. As substrate roughness increased, the size effect of composite specimens first intensified and then weakened. Specifically, the size effect parameters of type B and type C specimens were 2.12 and 1.14 times those of type A specimens, respectively. The substrate roughness influenced the size effect by altering the characteristic structures of the bonding regions. Based on the Weibull statistical size effect theory and Bažant energy size effect theory, the calculation formula for the size effect law parameters of the splitting tensile strength of composite specimens was established.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"498 ","pages":"Article 144025"},"PeriodicalIF":8.0000,"publicationDate":"2025-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061825041765","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

The study investigates the influence of substrate surface roughness and size effect on the bonding performance of high-performance concrete (HPC) and normal strength concrete (NSC). The bonding performance of the composite specimens was evaluated by splitting tensile strength and DIC technology was employed to monitor crack development. Furthermore, the size effect mechanism of tensile bonding strength considering the influence of surface roughness was revealed combined with microscopic experiments. Results show that the combination of 3D scanning and digital image processing methods enabled a comprehensive evaluation of substrate roughness from both local and overall feature dimensions. The increase in substrate roughness will only significantly improve the repair effectiveness within a certain range. The optimal repair effectiveness can reach up to 194.08 %. Specimens with smooth surface showed single crack propagation path with gradual strain evolution, whereas specimens with rough surfaces exhibited tortuous crack paths with abrupt strain surges. In addition, the size effect of ordinary concrete was dramatically smaller than that of composite specimen. As substrate roughness increased, the size effect of composite specimens first intensified and then weakened. Specifically, the size effect parameters of type B and type C specimens were 2.12 and 1.14 times those of type A specimens, respectively. The substrate roughness influenced the size effect by altering the characteristic structures of the bonding regions. Based on the Weibull statistical size effect theory and Bažant energy size effect theory, the calculation formula for the size effect law parameters of the splitting tensile strength of composite specimens was established.

查看原文本刊更多论文

基于劈裂拉伸试验的高性能混凝土与普通强度混凝土粘结性能：尺寸和基材表面粗糙度的影响

研究了基材表面粗糙度和尺寸效应对高性能混凝土（HPC）与普通强度混凝土（NSC）粘结性能的影响。采用劈裂拉伸强度评价复合材料试件的粘结性能，采用DIC技术监测裂纹发展情况。结合细观实验，揭示了考虑表面粗糙度影响的拉伸结合强度的尺寸效应机理。结果表明，结合三维扫描和数字图像处理方法，可以从局部和整体特征维度对基材粗糙度进行综合评估。基材粗糙度的增加只会在一定范围内显著提高修复效果。最佳修复效率可达194.08 %。表面光滑的试样裂纹扩展路径为单一，应变演化为渐变；表面粗糙的试样裂纹扩展路径为曲折，应变演化为突变。此外，普通混凝土的尺寸效应明显小于复合试件。随着基体粗糙度的增大，复合试样的尺寸效应先增强后减弱。其中，B型和C型试件的尺寸效应参数分别是A型试件的2.12倍和1.14倍。衬底粗糙度通过改变键合区的特征结构来影响尺寸效应。基于Weibull统计尺寸效应理论和Bažant能量尺寸效应理论，建立了复合材料试件劈裂抗拉强度尺寸效应规律参数的计算公式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.