Influence of polyoxymethylene fibers on autogenous shrinkage, tensile creep, and cracking resistance of ultra-high performance concrete

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

Cement & concrete composites Pub Date : 2025-04-11 DOI:10.1016/j.cemconcomp.2025.106090

Dejian Shen , Haoze Shao , Ying Huang , Ci Liu , Quan Huang , Chen Zhao

{"title":"Influence of polyoxymethylene fibers on autogenous shrinkage, tensile creep, and cracking resistance of ultra-high performance concrete","authors":"Dejian Shen , Haoze Shao , Ying Huang , Ci Liu , Quan Huang , Chen Zhao","doi":"10.1016/j.cemconcomp.2025.106090","DOIUrl":null,"url":null,"abstract":"<div><div>Supersulfated cement (SSC) has been utilized in ultra-high performance concrete (UHPC) to replace Portland cement to reduce carbon dioxide emissions and energy consumption. Polyoxymethylene fibers (POMF) have been added in UHPC to decrease shrinkage and increase tensile strength. Autogenous shrinkage and tensile creep are important factors in evaluating the cracking resistance of UHPC. However, investigations on the impact of POMF on the autogenous shrinkage, tensile creep, and cracking resistance of UHPC prepared by SSC (UHPC-SSC) remain insufficient, which limits the application of POMF on UHPC-SSC. Therefore, investigations on the impact of POMF on the autogenous shrinkage, tensile creep, and cracking resistance of UHPC-SSC by using temperature stress test machine (TSTM) were systematically carried out in this study. Meanwhile, the workability and mechanical properties tests were also conducted. Test results indicated that the splitting tensile strength and compressive strength of UHPC-SSC first increased and then decreased with the increase of the contents of POMF. In addition, the autogenous shrinkage of UHPC-SSC decreased by 31.87 % when the content of POMF was 3 %. Furthermore, the basic tensile creep, creep-shrinkage ratio, and specific tensile creep of UHPC-SSC decreased with the increase of the contents of POMF. Incorporating POMF delayed the cracking time of UHPC-SSC, and the cracking resistance first increased and then decreased with the increasing contents of POMF.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"161 ","pages":"Article 106090"},"PeriodicalIF":10.8000,"publicationDate":"2025-04-11","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/S0958946525001726","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

Supersulfated cement (SSC) has been utilized in ultra-high performance concrete (UHPC) to replace Portland cement to reduce carbon dioxide emissions and energy consumption. Polyoxymethylene fibers (POMF) have been added in UHPC to decrease shrinkage and increase tensile strength. Autogenous shrinkage and tensile creep are important factors in evaluating the cracking resistance of UHPC. However, investigations on the impact of POMF on the autogenous shrinkage, tensile creep, and cracking resistance of UHPC prepared by SSC (UHPC-SSC) remain insufficient, which limits the application of POMF on UHPC-SSC. Therefore, investigations on the impact of POMF on the autogenous shrinkage, tensile creep, and cracking resistance of UHPC-SSC by using temperature stress test machine (TSTM) were systematically carried out in this study. Meanwhile, the workability and mechanical properties tests were also conducted. Test results indicated that the splitting tensile strength and compressive strength of UHPC-SSC first increased and then decreased with the increase of the contents of POMF. In addition, the autogenous shrinkage of UHPC-SSC decreased by 31.87 % when the content of POMF was 3 %. Furthermore, the basic tensile creep, creep-shrinkage ratio, and specific tensile creep of UHPC-SSC decreased with the increase of the contents of POMF. Incorporating POMF delayed the cracking time of UHPC-SSC, and the cracking resistance first increased and then decreased with the increasing contents of POMF.

查看原文本刊更多论文

聚甲醛纤维对超高性能混凝土自收缩、拉伸徐变及抗裂性能的影响

超高性能混凝土（UHPC）中使用了超硫酸盐水泥（SSC）来替代波特兰水泥，以减少二氧化碳排放和能源消耗。超高性能混凝土中添加了聚甲醛纤维（POMF），以减少收缩并提高抗拉强度。自生收缩和拉伸蠕变是评估超高性能混凝土抗裂性的重要因素。然而，有关 POMF 对 SSC 制备的 UHPC（UHPC-SSC）的自生收缩、拉伸蠕变和抗裂性的影响的研究仍然不足，这限制了 POMF 在 UHPC-SSC 中的应用。因此，本研究利用温度应力试验机（TSTM）系统地研究了 POMF 对 UHPC-SSC 的自生收缩、拉伸蠕变和抗裂性能的影响。同时，还进行了施工性能和机械性能测试。试验结果表明，随着 POMF 含量的增加，UHPC-SSC 的劈裂拉伸强度和抗压强度先增大后减小。此外，当 POMF 含量为 3% 时，UHPC-SSC 的自生收缩率降低了 31.87%。此外，随着 POMF 含量的增加，UHPC-SSC 的基本拉伸蠕变率、蠕变收缩率和比拉伸蠕变率都有所下降。加入 POMF 增加了 UHPC-SSC 的开裂时间，随着 POMF 含量的增加，其抗裂性先增大后减小。

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.