文献类型：期刊文献

英文题名：Advanced in-situ 4D CT reconstruction for exploring fiber distribution effects on the mechanical behaviors and interface optimization of carbonated high-toughness recycled aggregate concrete

作者：Wang, Changqing[1,4];Yuan, Jiayu[1];Zhang, Youchao[2];Wu, Huixia[3];Ma, Zhiming[2]

机构：[1]Shanghai Univ, Sch Mech & Engn Sci, Dept Civil Engn, Shanghai 200444, Peoples R China;[2]Yangzhou Univ, Coll Civil Sci & Engn, Yangzhou 225127, Peoples R China;[3]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[4]Tongji Univ, Coll Civil Engn, Dept Bldg Engn, Shanghai 200092, Peoples R China

年份：2025

卷号：473

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:001459585300001)、、EI(收录号：20251318130398)、Scopus(收录号：2-s2.0-105000970591)、WOS

基金：The authors wish to acknowledge the financial support from the National Natural Science Foundation of China (NSFC) through Grant No.

语种：英文

外文关键词：Carbonated high-toughness recycled aggregate concrete (CHTRAC); Fiber distribution effect; High-resolution CT reconstruction; Mechanical behaviors; Interface transition zone optimization

外文摘要：Carbonated high-toughness recycled aggregate concrete (CHTRAC), as a green building material, effectively utilizes waste materials, reduces environmental pollution, and significantly improves the mechanical properties and durability of concrete, aligning with the principles of sustainable development. This study employs high-resolution in-situ 4D CT reconstruction technology to investigate the effects of fiber distribution on the mechanical behaviors and interface transition zone optimization of carbonated high-toughness recycled aggregate concrete. By overcoming the limitations of existing fiber distribution analysis techniques, high-resolution CT scanning is used to precisely reconstruct the three-dimensional spatial distribution of fibers and analyze the mechanical behavior and interface characteristics under different fiber distribution states. The study finds that fiber distribution significantly influences the mechanical behaviors of carbonated high-toughness recycled aggregate concrete, particularly peak stress, elastic modulus, and post-peak modulus. By analyzing the distribution patterns of fiber angles and quantities, a fiber distribution effect coefficient is proposed, and a numerical prediction model based on the relationship between fiber distribution and mechanical characteristics is established. Additionally, the distribution of fibers improves the interface transition zone, with optimized fiber angle distributions effectively reducing the width of the transition zone, thereby enhancing the durability and strength of the concrete. This research provides theoretical support and experimental evidence for the performance optimization and engineering applications of fiber-reinforced carbonated high-toughness recycled aggregate concrete.