Micromechanical Structure-Property Relationships for the Damage Analysis of Impact-Loaded Sustainable Concrete


Erdem S. , Dawson A. R. , Thom N. H.

JOURNAL OF MATERIALS IN CIVIL ENGINEERING, cilt.25, ss.597-609, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 25 Konu: 5
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1061/(asce)mt.1943-5533.0000616
  • Dergi Adı: JOURNAL OF MATERIALS IN CIVIL ENGINEERING
  • Sayfa Sayıları: ss.597-609

Özet

In this study, quantitative microstructure-property relationships are mainly used to characterize the damage due to high-strain-rate impact loading and the mechanical behavior of concretes prepared by substituting natural aggregate (gravel) with recycled aggregates having different rigidities (blue brick and rubber). Based on the results obtained, a possible mechanism for microstructural damage in concrete is proposed. It is concluded that the aggregate causes a change in the initial interfacial transition zone (ITZ) condition, and it is this altered ITZ condition that has a major effect on overall mix behavior. The analysis also indicates that there is almost a linear correlation between the roughness values (Ra) of the region near the paste-aggregate interface and the dissipated surface fracture energy values of the specimens. Moreover, three-dimensional topographic images of the specimens constructed using a vertical nanotech scanning interferometer show that the paste region of the gravel specimen has the smoothest profile due to the relatively strong hydrated paste. DOI: 10.1061/(ASCE)MT.1943-5533.0000616. (C) 2013 American Society of Civil Engineers.