Meshach Ojo , Donghyun Kim , Lesley Frame , Kay Wille
{"title":"含硫化铁骨料混凝土加速老化的电化学研究","authors":"Meshach Ojo , Donghyun Kim , Lesley Frame , Kay Wille","doi":"10.1016/j.cemconres.2024.107570","DOIUrl":null,"url":null,"abstract":"<div><p>The present study advances the understanding of deterioration progress in concrete foundations containing iron-sulfide bearing aggregates through electrochemical accelerated testing, coupled with non-destructive damage evaluation. The method addresses the challenge of time constraints in conventional laboratory studies by expediting the iron-sulfide oxidation process and subsequent concrete deterioration mechanisms in a controlled environment. Concrete cylinders cast in the laboratory and cored from an affected foundation in the field were subjected to the acceleration method under varied applied voltage and electrolyte exposure. Samples with iron-sulfide aggregates showed field-typical signs of deterioration within days to weeks, while those without these aggregates did not exhibit any measurable damage. The deterioration progressed with increased exposure time and applied voltage, evidenced by visual observation, quantified by decreased resonance frequency and increased total crack length. Complemented by microstructural and phase analyses, the results showed the successful accelerated replication of pyrrhotite oxidation and subsequent concrete deterioration.</p></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":null,"pages":null},"PeriodicalIF":10.9000,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Electrochemical investigation of accelerated deterioration of concrete with iron-sulfide containing aggregates\",\"authors\":\"Meshach Ojo , Donghyun Kim , Lesley Frame , Kay Wille\",\"doi\":\"10.1016/j.cemconres.2024.107570\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The present study advances the understanding of deterioration progress in concrete foundations containing iron-sulfide bearing aggregates through electrochemical accelerated testing, coupled with non-destructive damage evaluation. The method addresses the challenge of time constraints in conventional laboratory studies by expediting the iron-sulfide oxidation process and subsequent concrete deterioration mechanisms in a controlled environment. Concrete cylinders cast in the laboratory and cored from an affected foundation in the field were subjected to the acceleration method under varied applied voltage and electrolyte exposure. Samples with iron-sulfide aggregates showed field-typical signs of deterioration within days to weeks, while those without these aggregates did not exhibit any measurable damage. The deterioration progressed with increased exposure time and applied voltage, evidenced by visual observation, quantified by decreased resonance frequency and increased total crack length. Complemented by microstructural and phase analyses, the results showed the successful accelerated replication of pyrrhotite oxidation and subsequent concrete deterioration.</p></div>\",\"PeriodicalId\":266,\"journal\":{\"name\":\"Cement and Concrete Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.9000,\"publicationDate\":\"2024-06-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cement and Concrete Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0008884624001510\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement and Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008884624001510","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}
Electrochemical investigation of accelerated deterioration of concrete with iron-sulfide containing aggregates
The present study advances the understanding of deterioration progress in concrete foundations containing iron-sulfide bearing aggregates through electrochemical accelerated testing, coupled with non-destructive damage evaluation. The method addresses the challenge of time constraints in conventional laboratory studies by expediting the iron-sulfide oxidation process and subsequent concrete deterioration mechanisms in a controlled environment. Concrete cylinders cast in the laboratory and cored from an affected foundation in the field were subjected to the acceleration method under varied applied voltage and electrolyte exposure. Samples with iron-sulfide aggregates showed field-typical signs of deterioration within days to weeks, while those without these aggregates did not exhibit any measurable damage. The deterioration progressed with increased exposure time and applied voltage, evidenced by visual observation, quantified by decreased resonance frequency and increased total crack length. Complemented by microstructural and phase analyses, the results showed the successful accelerated replication of pyrrhotite oxidation and subsequent concrete deterioration.
期刊介绍:
Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.