TY - JOUR
T1 - Understanding the effect of nano/micro-structures on anti-impact of nano-boron nitride filled cementitious composites
AU - Wang, Jialiang
AU - Dong, Sufen
AU - Li, Zhenming
AU - Şahmaran, Mustafa
AU - Ding, Siqi
AU - Han, Baoguo
PY - 2021
Y1 - 2021
N2 - This paper aims to investigate the effect of nano/micro-structures on anti-impact property of nano-boron nitride (nano-BN) filled cementitious composites, and to predict the dynamic mechanical behavior of the composites by introducing a damage constitutive model. It is found that nano-BN can fundamentally modify the micro- and even nano-structures of cementitious composites, and therefore greatly improve the anti-impact property of the composites at the macro level. Specifically, nano-BN refines the pore structure (especially at nano-scale) of composite matrix and increases its compactness. Furthermore, by enhancing polymerization state of silicate tetrahedron in C-S-H gel, nano-BN improves the micromechanical properties of hydration products at different micro-zones. Consequently, dynamic mechanical property of cementitious composites at macro-level is enhanced, and the energy absorption capacity is improved. In addition, dynamic damage model indicates that nano-BN inhibits the damage of cementitious composites, but its inhibition form changes with the strain rate.
AB - This paper aims to investigate the effect of nano/micro-structures on anti-impact property of nano-boron nitride (nano-BN) filled cementitious composites, and to predict the dynamic mechanical behavior of the composites by introducing a damage constitutive model. It is found that nano-BN can fundamentally modify the micro- and even nano-structures of cementitious composites, and therefore greatly improve the anti-impact property of the composites at the macro level. Specifically, nano-BN refines the pore structure (especially at nano-scale) of composite matrix and increases its compactness. Furthermore, by enhancing polymerization state of silicate tetrahedron in C-S-H gel, nano-BN improves the micromechanical properties of hydration products at different micro-zones. Consequently, dynamic mechanical property of cementitious composites at macro-level is enhanced, and the energy absorption capacity is improved. In addition, dynamic damage model indicates that nano-BN inhibits the damage of cementitious composites, but its inhibition form changes with the strain rate.
KW - Anti-impact
KW - Cementitious composites
KW - Dynamic damage model
KW - Nano-boron nitride
KW - Nano/microstructures
UR - http://www.scopus.com/inward/record.url?scp=85107785606&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.123885
DO - 10.1016/j.conbuildmat.2021.123885
M3 - Article
AN - SCOPUS:85107785606
SN - 0950-0618
VL - 298
SP - 1
EP - 13
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 123885
ER -