TY - JOUR
T1 - Crack propagation and strain localization in metallic particulate-reinforced cementitious mortars
AU - Das, Sumanta
AU - Kizilkanat, Ahmet
AU - Neithalath, Narayanan
N1 - Funding Information:
The authors sincerely acknowledge the support from National Science Foundation (CMMI: 1353170 ) toward the conduct of this study. The second author acknowledges The Scientific and Technological Research Council of Turkey (TUBITAK) for financial support. The contents of this paper reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein, and do not necessarily reflect the views and policies of NSF, nor do the contents constitute a standard, specification or a regulation. We gratefully acknowledge the use of facilities within the Laboratory for the Science of Sustainable Infrastructural Materials (LS-SIM) and the LeRoy Eyring Center for Solid State Sciences (LE-CSSS) at Arizona State University. Raw materials were provided by U.S. Concrete, Schuff Steel, and Iron Shell LLC, which are acknowledged.
PY - 2015/8/15
Y1 - 2015/8/15
N2 - The influence of replacing up to 30% of ordinary Portland cement (OPC) by volume with waste iron powder (containing a significant fraction of elongated particles) on the fracture response of composite mortars is reported. The increase in the overall strain energy release rate at higher particulate contents is dominated by its elastic component, which correlates well with the increase in length of the fracture process zone (FPZ), determined using digital image correlation. The tensile properties of the composites, determined from an analytical tension model, are also found to increase with iron powder content. The impact of metallic particulate incorporation was the most prominent in enhancing the tensile toughness of the composite rather than the strength or stiffness. It is shown that cementitious systems with enhanced toughness typically attained through the use of fiber reinforcement can be designed using metallic particulate reinforcement, at a much lower OPC content, which thus provides the composite with sustainability benefits also.
AB - The influence of replacing up to 30% of ordinary Portland cement (OPC) by volume with waste iron powder (containing a significant fraction of elongated particles) on the fracture response of composite mortars is reported. The increase in the overall strain energy release rate at higher particulate contents is dominated by its elastic component, which correlates well with the increase in length of the fracture process zone (FPZ), determined using digital image correlation. The tensile properties of the composites, determined from an analytical tension model, are also found to increase with iron powder content. The impact of metallic particulate incorporation was the most prominent in enhancing the tensile toughness of the composite rather than the strength or stiffness. It is shown that cementitious systems with enhanced toughness typically attained through the use of fiber reinforcement can be designed using metallic particulate reinforcement, at a much lower OPC content, which thus provides the composite with sustainability benefits also.
KW - A. Iron particulate-reinforcement
KW - B. Tensile properties
KW - C. Digital image correlation
KW - C. Fracture process zone
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U2 - 10.1016/j.matdes.2015.04.038
DO - 10.1016/j.matdes.2015.04.038
M3 - Article
AN - SCOPUS:84929208145
VL - 79
SP - 15
EP - 25
JO - Materials and Design
JF - Materials and Design
SN - 0261-3069
ER -