TY - JOUR
T1 - The influences of soft and stiff inclusions on the mechanical properties of cementitious composites
AU - Falzone, Gabriel
AU - Falla, Guillermo Puerta
AU - Wei, Zhenhua
AU - Zhao, Mingjie
AU - Kumar, Aditya
AU - Bauchy, Mathieu
AU - Neithalath, Narayanan
AU - Pilon, Laurent
AU - Sant, Gaurav
N1 - Funding Information:
The authors acknowledge financial support for this research provisioned by the California Energy Commission (Contract: PIR: 12-032 ), University of California, Los Angeles (UCLA) and National Science Foundation (CMMI: 1130028 ) and an Infravation ERA-NET Plus Grant ( 31109806.0001 ). The contents of this paper reflect the views and opinions of the authors, who are responsible for the accuracy of the datasets presented herein, and do not reflect the views of the funding agency, nor do the contents constitute a specification, a standard or a regulation. This research was conducted in the Laboratory for the Chemistry of Construction Materials (LC 2 ) and the core-facility Molecular Instrumentation Center (MIC) at the University of California, Los Angeles. As such, the authors acknowledge the support of these laboratories in making this research possible.
Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - The embedment of microencapsulated phase change materials (PCMs) is a promising means for improving the thermal inertia of concrete. However the addition of such soft microcapsules degrades the mechanical properties, i.e., the elastic moduli and compressive strength, of cement-based composites. This study experimentally quantifies the effects of stiff quartz inclusions and soft PCM microcapsules, individually, and when added together, on the mechanical properties of cementitious composites. In addition, a variety of effective medium approximations (EMAs) were evaluated for their ability to predict the experimentally measured composite effective moduli. The EMAs proposed by Hobbs and Garboczi and Berryman (G-B) reliably estimate experimental data. The experimental data and the EMAs were applied to develop a design rule for performance equivalence, such that the composite modulus of elasticity can be maintained equivalent to that of the cementitious paste matrix, in spite of the addition of soft PCM microcapsules.
AB - The embedment of microencapsulated phase change materials (PCMs) is a promising means for improving the thermal inertia of concrete. However the addition of such soft microcapsules degrades the mechanical properties, i.e., the elastic moduli and compressive strength, of cement-based composites. This study experimentally quantifies the effects of stiff quartz inclusions and soft PCM microcapsules, individually, and when added together, on the mechanical properties of cementitious composites. In addition, a variety of effective medium approximations (EMAs) were evaluated for their ability to predict the experimentally measured composite effective moduli. The EMAs proposed by Hobbs and Garboczi and Berryman (G-B) reliably estimate experimental data. The experimental data and the EMAs were applied to develop a design rule for performance equivalence, such that the composite modulus of elasticity can be maintained equivalent to that of the cementitious paste matrix, in spite of the addition of soft PCM microcapsules.
KW - Elasticity
KW - Mechanical properties
KW - Mechanical testing
KW - Micromechanics
KW - Modeling
UR - http://www.scopus.com/inward/record.url?scp=84969872568&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84969872568&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2016.05.008
DO - 10.1016/j.cemconcomp.2016.05.008
M3 - Article
AN - SCOPUS:84969872568
SN - 0958-9465
VL - 71
SP - 153
EP - 165
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
ER -