Yi Xu , Qian Chen , Zhisheng Lv , Li Cao , Yichao Chen , Sheng Jiang , Zhengyu Zhu , Hongqiang Chu , Linhua Jiang
{"title":"富硫酸盐杂散电流环境下混凝土硫酸盐侵蚀行为的实验与模拟评价","authors":"Yi Xu , Qian Chen , Zhisheng Lv , Li Cao , Yichao Chen , Sheng Jiang , Zhengyu Zhu , Hongqiang Chu , Linhua Jiang","doi":"10.1016/j.cscm.2024.e04144","DOIUrl":null,"url":null,"abstract":"<div><div>The reinforced concrete structures within subway projects are often in a complex environment surrounded by the track's stray current and groundwater containing sulfate and chloride ions. These factors can contribute to concrete deterioration. The effects of current intensity and sulfate concentration on the sulfate resistance of concrete in subway engineering are investigated. The results indicate that the heightened current intensity can expedite sulfate ions migration, leading to the formation of swelling hydration products and pore refinement. Despite elevated sulfate concentration can also stimulate hydration, its effectiveness is not on par with that of increased current intensity. Moreover, phase analysis demonstrates a diminish in diffraction peak intensity for calcium hydroxide due to current, indicating the decomposition of calcium hydroxide. Pore analysis reveals that the current reduces harmful pores and improves concrete compactness and durability. Finite element analysis provides a basis for evaluating concrete's resistance to sulfate attacks in subway engineering.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"22 ","pages":"Article e04144"},"PeriodicalIF":6.5000,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental and simulation evaluation of sulfate attack behavior of concrete in sulfate-rich and stray current environment\",\"authors\":\"Yi Xu , Qian Chen , Zhisheng Lv , Li Cao , Yichao Chen , Sheng Jiang , Zhengyu Zhu , Hongqiang Chu , Linhua Jiang\",\"doi\":\"10.1016/j.cscm.2024.e04144\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The reinforced concrete structures within subway projects are often in a complex environment surrounded by the track's stray current and groundwater containing sulfate and chloride ions. These factors can contribute to concrete deterioration. The effects of current intensity and sulfate concentration on the sulfate resistance of concrete in subway engineering are investigated. The results indicate that the heightened current intensity can expedite sulfate ions migration, leading to the formation of swelling hydration products and pore refinement. Despite elevated sulfate concentration can also stimulate hydration, its effectiveness is not on par with that of increased current intensity. Moreover, phase analysis demonstrates a diminish in diffraction peak intensity for calcium hydroxide due to current, indicating the decomposition of calcium hydroxide. Pore analysis reveals that the current reduces harmful pores and improves concrete compactness and durability. Finite element analysis provides a basis for evaluating concrete's resistance to sulfate attacks in subway engineering.</div></div>\",\"PeriodicalId\":9641,\"journal\":{\"name\":\"Case Studies in Construction Materials\",\"volume\":\"22 \",\"pages\":\"Article e04144\"},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2024-12-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Case Studies in Construction Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2214509524012968\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Construction Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214509524012968","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Experimental and simulation evaluation of sulfate attack behavior of concrete in sulfate-rich and stray current environment
The reinforced concrete structures within subway projects are often in a complex environment surrounded by the track's stray current and groundwater containing sulfate and chloride ions. These factors can contribute to concrete deterioration. The effects of current intensity and sulfate concentration on the sulfate resistance of concrete in subway engineering are investigated. The results indicate that the heightened current intensity can expedite sulfate ions migration, leading to the formation of swelling hydration products and pore refinement. Despite elevated sulfate concentration can also stimulate hydration, its effectiveness is not on par with that of increased current intensity. Moreover, phase analysis demonstrates a diminish in diffraction peak intensity for calcium hydroxide due to current, indicating the decomposition of calcium hydroxide. Pore analysis reveals that the current reduces harmful pores and improves concrete compactness and durability. Finite element analysis provides a basis for evaluating concrete's resistance to sulfate attacks in subway engineering.
期刊介绍:
Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation).
The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.