TY - JOUR
T1 - Multiscale investigation of tensile properties of a TiO 2 -doped Engineered Cementitious Composite
AU - Xu, Mingfeng
AU - Bao, Yi
AU - Wu, Kai
AU - Shi, Huisheng
AU - Guo, Xiaolu
AU - Li, Victor C.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/6/10
Y1 - 2019/6/10
N2 - Engineered Cementitious Composites (ECC) provides a unique platform to develop high-performance and multifunctional construction materials with strain-hardening properties and exceptional crack control capability. ECC incorporating titanium dioxide (TiO 2 ) nanoparticles has intrinsically embodied photocatalytic properties, such as air-purifying functionality. However, there remains a lack of fundamental knowledge on how the presence of TiO 2 nanoparticles affects fiber/matrix interface and macro tensile properties of ECC. There is a need to establish a holistic understanding of the role of TiO 2 nanoparticles in ECC at multiple scales. To this end, this study experimentally investigates the effect of TiO 2 content (up to 15% of binder) on the fiber/matrix interface and on the tensile properties of ECC. A micromechanical model is used to link the multiscale material properties and interpret the test data of the TiO 2 -doped ECC. Results show that changes in the macroscopic tensile properties as a result of TiO 2 addition can be traced back to the matrix and fiber/matrix interface properties. The research findings provide insights into the underlying mechanisms of tensile property modifications by TiO 2 nanoparticles, as well as establishing a reference for the design of photocatalytic ECC for balanced functional and mechanical properties.
AB - Engineered Cementitious Composites (ECC) provides a unique platform to develop high-performance and multifunctional construction materials with strain-hardening properties and exceptional crack control capability. ECC incorporating titanium dioxide (TiO 2 ) nanoparticles has intrinsically embodied photocatalytic properties, such as air-purifying functionality. However, there remains a lack of fundamental knowledge on how the presence of TiO 2 nanoparticles affects fiber/matrix interface and macro tensile properties of ECC. There is a need to establish a holistic understanding of the role of TiO 2 nanoparticles in ECC at multiple scales. To this end, this study experimentally investigates the effect of TiO 2 content (up to 15% of binder) on the fiber/matrix interface and on the tensile properties of ECC. A micromechanical model is used to link the multiscale material properties and interpret the test data of the TiO 2 -doped ECC. Results show that changes in the macroscopic tensile properties as a result of TiO 2 addition can be traced back to the matrix and fiber/matrix interface properties. The research findings provide insights into the underlying mechanisms of tensile property modifications by TiO 2 nanoparticles, as well as establishing a reference for the design of photocatalytic ECC for balanced functional and mechanical properties.
KW - Engineered Cementitious Composites (ECC)
KW - Fiber/matrix interface
KW - Micromechanical modeling
KW - Tensile properties
KW - Titanium dioxide (TiO ) nanoparticles
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U2 - 10.1016/j.conbuildmat.2019.03.112
DO - 10.1016/j.conbuildmat.2019.03.112
M3 - Article
AN - SCOPUS:85062919303
SN - 0950-0618
VL - 209
SP - 485
EP - 491
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -