{"title":"Investigation of tensile cracking characteristics of high strength and toughness ECC(HST-ECC) and CFRP reinforced HST-ECC","authors":"Liyang Wang, Zongcai Deng","doi":"10.1016/j.cemconcomp.2025.106004","DOIUrl":null,"url":null,"abstract":"<div><div>To improve the tensile properties of Textile-Reinforced-Engineered-Cementitious-Composites (TR-ECC) and textile utilization efficiency, this study prepared a High-Strength and Toughness-Engineered-Cementitious-Composite (HST-ECC) with excellent compressive and tensile properties through strategic fiber hybridization and cementitious matrix design. Its compressive strength was 160–191 MPa, peak tensile strain was 4.21–9.76 %, tensile strength was 7.61–13.46 MPa, and the maximum crack width corresponding to the peak tensile strain was 70.77–86.16 μm. Building on this foundation, the tensile behavior of Carbon-Fiber-Reinforced-Polymer (CFRP) grid-reinforced HST-ECC (TR-HSTECC) was systematically investigated. Experimental results demonstrate the HST-ECC with textile can be work synergistically. Compared with the HST-ECC without textile, the tensile strength of TR-HSTECC with 3 layers of textile was increased by 194 %, and the peak tensile strain was increased by 118 %, however, the peak tensile strain and the number of cracks were reduced compared with that of the 2 layers of textile. A TR-HSTECC quadrilinear model was proposed, which accurately characterizes the stress-strain curves and strain-hardening at different tensile stages of TR-HSTECC. Additionally, a probability statistical model describing the distribution of cracks width in the tensile process of HST-ECC was established. This model exhibits strong consistency with experimental data and enables an accurate assessment of crack width probability distribution regularity across various tensile loading stages in HST-ECC.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"159 ","pages":"Article 106004"},"PeriodicalIF":10.8000,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement & concrete composites","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0958946525000861","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
To improve the tensile properties of Textile-Reinforced-Engineered-Cementitious-Composites (TR-ECC) and textile utilization efficiency, this study prepared a High-Strength and Toughness-Engineered-Cementitious-Composite (HST-ECC) with excellent compressive and tensile properties through strategic fiber hybridization and cementitious matrix design. Its compressive strength was 160–191 MPa, peak tensile strain was 4.21–9.76 %, tensile strength was 7.61–13.46 MPa, and the maximum crack width corresponding to the peak tensile strain was 70.77–86.16 μm. Building on this foundation, the tensile behavior of Carbon-Fiber-Reinforced-Polymer (CFRP) grid-reinforced HST-ECC (TR-HSTECC) was systematically investigated. Experimental results demonstrate the HST-ECC with textile can be work synergistically. Compared with the HST-ECC without textile, the tensile strength of TR-HSTECC with 3 layers of textile was increased by 194 %, and the peak tensile strain was increased by 118 %, however, the peak tensile strain and the number of cracks were reduced compared with that of the 2 layers of textile. A TR-HSTECC quadrilinear model was proposed, which accurately characterizes the stress-strain curves and strain-hardening at different tensile stages of TR-HSTECC. Additionally, a probability statistical model describing the distribution of cracks width in the tensile process of HST-ECC was established. This model exhibits strong consistency with experimental data and enables an accurate assessment of crack width probability distribution regularity across various tensile loading stages in HST-ECC.
期刊介绍:
Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.