Influence of the micro- and nanoscale local mechanical properties of the interfacial transition zone on impact behavior of concrete made with different aggregates
The influence of the microscale local mechanical properties of the interfacial transition zone (ITZ) on macro-level mechanical response and impact behavior is studied for concretes made with copper slag and gravel aggregates. 3D nanotech vertical scanning interferometry, scanning electron microscopy coupled with energy dispersive X-ray micro-analysis, digital image analysis, and 3D X-ray computed tomography were used to characterize the microstructures and the ITZs. It was deduced that a stronger and denser ITZ in the copper slag specimen would reduce its vulnerability to stiffness loss and contribute to its elastic and more ductile response under impact loading. The analysis also indicated that a significant degeneration in the pore structure of the gravel specimen associated with a relatively weaker and non-homogeneous ITZ occurred under impact. Finally, it was also concluded that increased roughness of ITZ may contribute to the load-carrying capacity of concrete under impact by improving contact point interactions and energy dissipation.
- OSTI ID:
- 21596961
- Journal Information:
- Cement and Concrete Research, Vol. 42, Issue 2; Other Information: DOI: 10.1016/j.cemconres.2011.11.015; PII: S0008-8846(11)00300-0; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPUTERIZED TOMOGRAPHY
CONCRETES
COPPER
FLEXIBILITY
IMAGE PROCESSING
INTERFEROMETRY
NANOSTRUCTURES
PORE STRUCTURE
SCANNING ELECTRON MICROSCOPY
VULNERABILITY
X RADIATION
BUILDING MATERIALS
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
ELEMENTS
IONIZING RADIATIONS
MATERIALS
MECHANICAL PROPERTIES
METALS
MICROSCOPY
MICROSTRUCTURE
PROCESSING
RADIATIONS
TENSILE PROPERTIES
TOMOGRAPHY
TRANSITION ELEMENTS