TY - JOUR
T1 - Effect of dispersibility of carbon nanotubes by silica fume on material properties of cement mortars
T2 - Hydration, pore structure, mechanical properties, self-desiccation, and autogenous shrinkage
AU - Song, Chiwon
AU - Hong, Geuntae
AU - Choi, Seongcheol
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/12/30
Y1 - 2020/12/30
N2 - In this study, the effect of dispersibility of carbon nanotubes (CNTs) by silica fume on the material properties of cement mortars were experimentally analyzed. Cement mortar specimens incorporating different proportions of silica fume and CNTs were fabricated, and tests were conducted to measure their hydration kinetics, pore structure, compressive strength, elastic modulus, internal relative humidity, and autogenous shrinkage. Additionally, scanning electron microscopy analysis was performed to observe the morphology of the CNTs in the cement matrix. The results revealed that the dispersibility of the CNTs was enhanced with the increasing replacement ratio of silica fume. Furthermore, well-dispersed CNTs resulted in a decrease in the self-desiccation by varying the pore structure and hydration kinetics, and an increase in the modulus of elasticity, thereby reducing the autogenous shrinkage of the cement mortar specimens.
AB - In this study, the effect of dispersibility of carbon nanotubes (CNTs) by silica fume on the material properties of cement mortars were experimentally analyzed. Cement mortar specimens incorporating different proportions of silica fume and CNTs were fabricated, and tests were conducted to measure their hydration kinetics, pore structure, compressive strength, elastic modulus, internal relative humidity, and autogenous shrinkage. Additionally, scanning electron microscopy analysis was performed to observe the morphology of the CNTs in the cement matrix. The results revealed that the dispersibility of the CNTs was enhanced with the increasing replacement ratio of silica fume. Furthermore, well-dispersed CNTs resulted in a decrease in the self-desiccation by varying the pore structure and hydration kinetics, and an increase in the modulus of elasticity, thereby reducing the autogenous shrinkage of the cement mortar specimens.
KW - Autogenous shrinkage
KW - Carbon nanotubes
KW - Dispersibility
KW - Hydration kinetics
KW - Mechanical properties
KW - Pore structure
KW - Self-desiccation
KW - Silica fume
UR - http://www.scopus.com/inward/record.url?scp=85088899884&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.120318
DO - 10.1016/j.conbuildmat.2020.120318
M3 - Article
AN - SCOPUS:85088899884
SN - 0950-0618
VL - 265
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 120318
ER -