TY - JOUR
T1 - Development of microscopic rheological model of cementitious suspension containing attapulgite based on water film thickness and bonding strength coefficient
AU - Tian, Zhenghong
AU - Ma, Yuanshan
AU - Liu, Hengrui
AU - Zhang, Shipeng
AU - Xiang, Junzheng
AU - Fan, Haoyue
N1 - Funding Information:
This study was financially supported by the National Natural Science Foundation of China [grant numbers 51909072 and 52279131 ] and the Fundamental Research Funds for the Central Universities [grant number B210202016 ]. This study was also financially supported by the Postgraduate Research & Practice Innovation Program of Jiangsu Province .(Nos KYCX21_ 0523).
Publisher Copyright:
© 2023
PY - 2023/7/1
Y1 - 2023/7/1
N2 - Based on the theoretical framework of water film thickness (WFT) and bonding strength coefficient (ζ), the motion and collision laws of particles in shear flow field were analyzed by using continuum mechanics, particle collision mechanics, fluid mechanics, thermodynamics and hydration dynamics, and the microscopic rheological model of cementitious suspension containing attapulgite (BGA and GBA) was established to predict the rheological parameters. The results indicated that the error range of rheological parameters predicted by the microscopic rheological model based on WFT-ζ and the experimental values was 0.09%–8.66%. The model can well predict the influence of BGA and GBA on rheological parameters. In addition, ζ has been proved to be closely related to the net force of four microscopic forces in the cementitious suspension, including gravity, van der Waals force, electrostatic double repulsion force and adhesion force caused by hydration product formation, which can characterize the bonding strength between particles.
AB - Based on the theoretical framework of water film thickness (WFT) and bonding strength coefficient (ζ), the motion and collision laws of particles in shear flow field were analyzed by using continuum mechanics, particle collision mechanics, fluid mechanics, thermodynamics and hydration dynamics, and the microscopic rheological model of cementitious suspension containing attapulgite (BGA and GBA) was established to predict the rheological parameters. The results indicated that the error range of rheological parameters predicted by the microscopic rheological model based on WFT-ζ and the experimental values was 0.09%–8.66%. The model can well predict the influence of BGA and GBA on rheological parameters. In addition, ζ has been proved to be closely related to the net force of four microscopic forces in the cementitious suspension, including gravity, van der Waals force, electrostatic double repulsion force and adhesion force caused by hydration product formation, which can characterize the bonding strength between particles.
KW - Attapulgite
KW - Bonding strength coefficient
KW - Microscopic rheological model
KW - Rheological parameters
KW - Water film thickness
UR - http://www.scopus.com/inward/record.url?scp=85156138147&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2023.118597
DO - 10.1016/j.powtec.2023.118597
M3 - Journal article
AN - SCOPUS:85156138147
SN - 0032-5910
VL - 425
JO - Powder Technology
JF - Powder Technology
M1 - 118597
ER -