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Title	ASSESSING THE ITZ MICROCRACKING VIA SCANNING ELECTRON MICROSCOPE AND ITS EFFECT ON THE FAILURE BEHAVIOR OF CONCRETE
Accession No	00989033
Authors	Akcaoglu, T; Tokyay, M; Celik, T
Journal Title	Cement and Concrete Research Vol. 35 No. 2
Corp. Authors / Publisher	Elsevier
Publication Date	20050200
Description	p. 358-363; Figures(5); References(19); Tables(1)
Languages	English
Abstract	The interfacial transition zone (ITZ) of concrete plays a critical role in determining the mechanical properties and failure behavior of concrete composites. This article reports on a study of the influence of aggregate size and water-to-cement (w/c) ratio of the matrix on the structure of interfacial transition zone (ITZ). The study also considered the interaction between the ITZ and the matrix on the failure process of concrete under uniaxial compression. The results showed that at low w/c ratios, the rigid and smooth surface texture aggregates made by the ITZ have a significant structural difference compared to the mortar. With larger aggregates, lower w/c ratio matrices resulted in more critical ITZs with a large difference in strength compared to the matrix. This was promoted by the adverse effect of the rigid and smooth aggregate with increased matrix quality. The authors conclude that the interfacial bond was the deciding factor for the tensile strength and played little role on the compressive strength. Higher structural differences between the mortar matrix and ITZ in low w/c ratio composites resulted in accelerated ITZ microcracking at high stress level.
TRT Terms	Aggregates ; Cement ; Compressive strength ; Cracking ; Durability ; Microstructure ; Tensile properties ; Tensile strength ; Transition zone (Fluid mechanics) ; Uniaxial stress ; Water cement ratio
Other Terms	Interfacial transition zone
Subject Areas	H32 CEMENT AND CONCRETE; I32 Concrete
Availability	Elsevier Find a library where document is available Order Document: http://worldcat.org/issn/00088846
TRIS Files	HRIS
Database	TRIS Online

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