Application of depth-sensing microindentation testing to study of interfacial transition zone in reinforced concrete

Citation
Wz. Zhu et Pjm. Bartos, Application of depth-sensing microindentation testing to study of interfacial transition zone in reinforced concrete, CEM CONCR R, 30(8), 2000, pp. 1299-1304
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
CEMENT AND CONCRETE RESEARCH
ISSN journal
0008-8846 → ACNP
Volume
30
Issue
8
Year of publication
2000
Pages
1299 - 1304
Database
ISI
SICI code
0008-8846(200008)30:8<1299:AODMTT>2.0.ZU;2-C
Abstract
A new method, the depth-sensing microindentation technique, was successfull y used to study the elastic modulus and micro-strength of the interfacial t ransition zone (ITZ) around steel reinforcement in practical reinforced con crete. A normal concrete mix and a special self-compacting concrete (SCC) m ix, both produced commercially, were used in the study. It was found that t he elastic modulus and microstrength in the ITZ were significantly lower on the bottom side of a horizontal steel reinforcement than on the top side. The difference was particularly pronounced in the 10-30 mum distance from t he actual interface. The method showed clear advantages over the convention al Vickers microhardness test. (C) 2000 Elsevier Science Ltd. All rights re served.