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Quantitative characterization and elastic properties of interfacial transition zone around coarse aggregate in concrete
Jia Z.2; Han Y.2; Zhang Y.2; Qiu C.2; Hu C.1; Li Z.1
2017-08-01
Source PublicationJournal Wuhan University of Technology, Materials Science Edition
ISSN19930437 10002413
Volume32Issue:4Pages:838-844
AbstractBackscattered electron images (BSE) obtained by scanning electron microscope was used to quantitatively characterize the microstructure of interfacial transition zone (ITZ) in concrete. Influences of aggregate size (5, 10, 20, and 30 mm), water to cement ratio (0.23, 0.35 and 0.53) and curing time (from 3d to 90d) on the microstructure of interfacial transition zone between coarse aggregate and bulk cement matrix were investigated. The volume percentage of detectable porosity and unhydrated cement in ITZ was quantitatively analyzed and compared with that in the matrix of various concretes. Nanoindentation technology was applied to obtain the elastic properties of ITZ and matrix, and the elastic modulus of concrete was then calculated based on the Lu & Torquato model and self-consistence scheme by using the ITZ thickness and elastic modulus obtained from this investigation. The experimental results demonstrated that the microstructure and thickness of ITZ in concrete vary with a variety of factors, like aggregate size, water to cement ratio and curing time. The relative low elastic properties of ITZ should be paid attention to, especially for early age concrete.
Keywordbackscattered electron image concrete elastic modulus interfacial transition zone nanoindentation
DOI10.1007/s11595-017-1677-8
URLView the original
Language英語
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Cited Times [WOS]:5   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Hong Kong University of Science and Technology
2.Southeast University
Recommended Citation
GB/T 7714
Jia Z.,Han Y.,Zhang Y.,et al. Quantitative characterization and elastic properties of interfacial transition zone around coarse aggregate in concrete[J]. Journal Wuhan University of Technology, Materials Science Edition,2017,32(4):838-844.
APA Jia Z.,Han Y.,Zhang Y.,Qiu C.,Hu C.,&Li Z..(2017).Quantitative characterization and elastic properties of interfacial transition zone around coarse aggregate in concrete.Journal Wuhan University of Technology, Materials Science Edition,32(4),838-844.
MLA Jia Z.,et al."Quantitative characterization and elastic properties of interfacial transition zone around coarse aggregate in concrete".Journal Wuhan University of Technology, Materials Science Edition 32.4(2017):838-844.
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