Low-velocity impact behavior of functionally graded cement-based composites: Combining SFRC, UHPC and textile-reinforced UHPC

IF 10.8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2025-04-14 DOI:10.1016/j.cemconcomp.2025.106079

Júlio Jorge Braga de Carvalho Nunes , Felipe Rodrigues de Souza , Pablo Augusto Krahl , Rebecca Mansur de Castro Silva , Pâmela Pires de Paula , Flávio de Andrade Silva

{"title":"Low-velocity impact behavior of functionally graded cement-based composites: Combining SFRC, UHPC and textile-reinforced UHPC","authors":"Júlio Jorge Braga de Carvalho Nunes , Felipe Rodrigues de Souza , Pablo Augusto Krahl , Rebecca Mansur de Castro Silva , Pâmela Pires de Paula , Flávio de Andrade Silva","doi":"10.1016/j.cemconcomp.2025.106079","DOIUrl":null,"url":null,"abstract":"<div><div>Functionally graded cement-based materials can be designed to exhibit high energy dissipation capacity by applying materials in specific positions according to the loading protocol. A layer of Ultra-High-Performance Concrete (UHPC) combined with carbon textiles positioned in the most critical zone is a promising solution to improve the behavior of cement-based composites against impact, which has not yet been fully clarified. This study presents a novel two-layer composite approach, combining Steel Fiber Reinforced Concrete (SFRC) with UHPC and carbon textiles, tested under drop weight impact. Three different energy levels were investigated: 112.8, 225.6, and 338.4 J. The UHPC thin layers were reinforced with smooth or steel hooked end fibers, and a group was combined with Textile Reinforced Concrete (TRC). SFRC and UHPC were cast simultaneously, improving the bond between the matrices. The results highlight that SFRC + UHPC with steel hooked fibers have better impact performance than SFRC + UHPC with smooth fibers, exhibiting better crack opening control, higher impact resistance, and lower deflection. Additionally, the same trend was observed when the UHPC layer was reinforced with TRC, which demonstrated a significant reduction in residual displacements and crack openings, as well as improved energy absorption capacity, with increases of up to 370% compared to conventional specimens, highlighting their potential for high-impact applications.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"161 ","pages":"Article 106079"},"PeriodicalIF":10.8000,"publicationDate":"2025-04-14","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/S0958946525001611","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

Functionally graded cement-based materials can be designed to exhibit high energy dissipation capacity by applying materials in specific positions according to the loading protocol. A layer of Ultra-High-Performance Concrete (UHPC) combined with carbon textiles positioned in the most critical zone is a promising solution to improve the behavior of cement-based composites against impact, which has not yet been fully clarified. This study presents a novel two-layer composite approach, combining Steel Fiber Reinforced Concrete (SFRC) with UHPC and carbon textiles, tested under drop weight impact. Three different energy levels were investigated: 112.8, 225.6, and 338.4 J. The UHPC thin layers were reinforced with smooth or steel hooked end fibers, and a group was combined with Textile Reinforced Concrete (TRC). SFRC and UHPC were cast simultaneously, improving the bond between the matrices. The results highlight that SFRC + UHPC with steel hooked fibers have better impact performance than SFRC + UHPC with smooth fibers, exhibiting better crack opening control, higher impact resistance, and lower deflection. Additionally, the same trend was observed when the UHPC layer was reinforced with TRC, which demonstrated a significant reduction in residual displacements and crack openings, as well as improved energy absorption capacity, with increases of up to 370% compared to conventional specimens, highlighting their potential for high-impact applications.

查看原文本刊更多论文

功能级配水泥基复合材料的低速冲击性能：结合SFRC、UHPC和纺织增强UHPC

功能级配水泥基材料可以根据加载方案在特定位置施加材料，从而设计出具有较高耗能能力的材料。一层超高性能混凝土（UHPC）与位于最关键区域的碳纺织品相结合，是一种有希望的解决方案，可以改善水泥基复合材料的抗冲击性能，但目前尚未完全阐明。本研究提出了一种新型的双层复合材料方法，将钢纤维增强混凝土（SFRC）与UHPC和碳纺织品结合起来，进行了落锤冲击试验。研究了三个不同的能级：112.8、225.6和338.4焦耳。UHPC薄层用光滑或钢钩端纤维加固，一组用纺织钢筋混凝土（TRC）加固。SFRC和UHPC同时浇注，提高了基体之间的结合。结果表明，钢钩纤维的SFRC+UHPC比光滑纤维的SFRC+UHPC具有更好的冲击性能，具有更好的裂缝张开控制、更高的抗冲击性能和更小的挠度。此外，当用TRC加固UHPC层时，也观察到同样的趋势，这表明残余位移和裂缝开口显著减少，并提高了能量吸收能力，与常规试样相比，增加了370%，突出了它们在高影响应用中的潜力。

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

Cement & concrete composites 工程技术-材料科学：复合

CiteScore

18.70

自引率

11.40%

发文量

459

审稿时长

65 days

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.