A study on characteristics of interfacial transition zone in concrete

The aim of this study was to observe the behavior of the interfacial transition zone (ITZ) of high-performance concrete that was under curing in saturated lime water. From the Scanning Electron Microscope (SEM), it was found that the pores and hydration products at the ITZ, within 100 μm between the...

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Bibliographic Details
Published in:Cement and concrete research 2004-06, Vol.34 (6), p.977-989
Main Authors: Liao, Kuo-Yu, Chang, Ping-Kun, Peng, Yaw-Nan, Yang, Chih-Chang
Format: Article
Language:English
Subjects:
Applied sciences
BINDERS
Buildings. Public works
CONCRETES
Concretes. Mortars. Grouts
CURING
Exact sciences and technology
HYDRATION
Hydration products
Interfacial transition zone
Materials
MATERIALS SCIENCE
Other special applications (sand concrete, roller compacted concrete, heavy concrete, architectural concrete, etc.)
PLASTICIZERS
SCANNING ELECTRON MICROSCOPY
Superplasticizers
Water-to-binder ratio
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Summary:The aim of this study was to observe the behavior of the interfacial transition zone (ITZ) of high-performance concrete that was under curing in saturated lime water. From the Scanning Electron Microscope (SEM), it was found that the pores and hydration products at the ITZ, within 100 μm between the paste and aggregate, permuted each other during the early hydration stage, and then appeared as a large lump or strip. They gradually became irregular and small lumps for the further curing age. At the curing age of 56 days, the pores almost concentrated within an area of 0–15 μm from the aggregate edge. The hydration products were much denser with the increase in its distance from the aggregate edge.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2003.11.019