In situ concrete sewer performance: comparison of Portland cement, calcium sulfoaluminate cement, and calcium aluminate cement

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2024-05-27 DOI:10.1617/s11527-024-02390-2

Alice Titus Bakera, Mark G. Alexander

{"title":"In situ concrete sewer performance: comparison of Portland cement, calcium sulfoaluminate cement, and calcium aluminate cement","authors":"Alice Titus Bakera, Mark G. Alexander","doi":"10.1617/s11527-024-02390-2","DOIUrl":null,"url":null,"abstract":"<div><p>This paper seeks to provide a better understanding of the performance of calcium sulfoaluminate cement (CSA) in comparison with calcium aluminate cement (CAC) and Portland-limestone cement, CEM II A/L 52.5 N (CEM II) in live sewer environments, thereby providing rich field data for enhancing sewer concrete design. Three concrete mixes using these binders, with 0.34 w/b, siliceous pit sand, and dolomite aggregates, were prepared and exposed for 26 months in two sewer sites. Visual observations, measurements of concrete surface pH, and mass and thickness change were conducted regularly to observe deterioration. After exposure, microstructural analyses based on SEM, QEMSCAN, and XRD were conducted to clarify the deterioration mechanisms further. Regardless of sewer exposure conditions, the results indicated that CAC concrete had superior performance, followed by CSA, then CEM II. Sewer hydraulic action and high H<sub>2</sub>S gas concentrations (max. > 300 ppm) caused accelerated corrosion rates. Binder performances were primarily related to their chemistry, mineralogy, and aggregate interaction.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials and Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1617/s11527-024-02390-2","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

This paper seeks to provide a better understanding of the performance of calcium sulfoaluminate cement (CSA) in comparison with calcium aluminate cement (CAC) and Portland-limestone cement, CEM II A/L 52.5 N (CEM II) in live sewer environments, thereby providing rich field data for enhancing sewer concrete design. Three concrete mixes using these binders, with 0.34 w/b, siliceous pit sand, and dolomite aggregates, were prepared and exposed for 26 months in two sewer sites. Visual observations, measurements of concrete surface pH, and mass and thickness change were conducted regularly to observe deterioration. After exposure, microstructural analyses based on SEM, QEMSCAN, and XRD were conducted to clarify the deterioration mechanisms further. Regardless of sewer exposure conditions, the results indicated that CAC concrete had superior performance, followed by CSA, then CEM II. Sewer hydraulic action and high H₂S gas concentrations (max. > 300 ppm) caused accelerated corrosion rates. Binder performances were primarily related to their chemistry, mineralogy, and aggregate interaction.

Abstract Image

查看原文本刊更多论文

现浇混凝土下水道性能：硅酸盐水泥、硫铝酸钙水泥和铝酸钙水泥的比较

本文旨在更好地了解硫铝酸钙水泥（CSA）与铝酸钙水泥（CAC）和波特兰石灰石水泥 CEM II A/L 52.5 N（CEM II）在实际下水道环境中的性能比较，从而为加强下水道混凝土设计提供丰富的现场数据。使用这些粘结剂（0.34 w/b、硅质坑砂和白云石集料）配制了三种混凝土混合物，并在两个下水道现场暴露了 26 个月。定期进行目视观察、混凝土表面 pH 值测量以及质量和厚度变化，以观察劣化情况。暴露后，通过扫描电镜、QEMSCAN 和 XRD 进行微观结构分析，以进一步明确劣化机制。结果表明，无论下水道暴露条件如何，CAC 混凝土的性能都很优越，其次是 CSA，然后是 CEM II。下水道的水力作用和高浓度 H2S 气体（最大 300 ppm）导致腐蚀速度加快。粘结剂的性能主要与其化学性质、矿物学和集料相互作用有关。

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

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.