{"title":"Microstructural Changes of High Strength Concrete during Low Cycle Compression Fatigue Test after Exposure to High Temperature","authors":"D. Zhao, Wenbo He, Peiyuan Hao","doi":"10.3311/ppci.21506","DOIUrl":null,"url":null,"abstract":"Using ultrasonic detection, microhardness test, scanning electron microscope test, mercury intrusion method and X-ray diffraction, the parameters of sonic time, microhardness, pore size distribution, cumulative pumping of high strength concrete under low cycle compression loading are tested after exposure to 200 °C, 400 °C and 600 °C. Experimental study showed that with the increasing loading times, the rangeability of sonic time, the microhardness, and total pore volume shows an overall trend of fast-slow-fast. Furthermore, the sonic time and microhardness are linearly related to the longitudinal fatigue strain. The research results provided references for nondestructive testing, fatigue damage analysis and structural evaluation of concrete structures subjected to fire or other high temperature processes.\n\n\n \n\n","PeriodicalId":49705,"journal":{"name":"Periodica Polytechnica-Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Periodica Polytechnica-Civil Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.3311/ppci.21506","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
Using ultrasonic detection, microhardness test, scanning electron microscope test, mercury intrusion method and X-ray diffraction, the parameters of sonic time, microhardness, pore size distribution, cumulative pumping of high strength concrete under low cycle compression loading are tested after exposure to 200 °C, 400 °C and 600 °C. Experimental study showed that with the increasing loading times, the rangeability of sonic time, the microhardness, and total pore volume shows an overall trend of fast-slow-fast. Furthermore, the sonic time and microhardness are linearly related to the longitudinal fatigue strain. The research results provided references for nondestructive testing, fatigue damage analysis and structural evaluation of concrete structures subjected to fire or other high temperature processes.
期刊介绍：
Periodica Polytechnica Civil Engineering is a peer reviewed scientific journal published by the Faculty of Civil Engineering of the Budapest University of Technology and Economics. It was founded in 1957. Publication frequency: quarterly.
Periodica Polytechnica Civil Engineering publishes both research and application oriented papers, in the area of civil engineering.
The main scope of the journal is to publish original research articles in the wide field of civil engineering, including geodesy and surveying, construction materials and engineering geology, photogrammetry and geoinformatics, geotechnics, structural engineering, architectural engineering, structural mechanics, highway and railway engineering, hydraulic and water resources engineering, sanitary and environmental engineering, engineering optimisation and history of civil engineering. The journal is abstracted by several international databases, see the main page.
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