Abstract
In this paper, the rheological parameters of the alkali-activated slag underwater non-dispersible paste (AAS-UNDP) were tested, and the influence of polyacrylamide (PAM) on the rheological property of AAS-UNDP was studied combing with the method of molecular dynamics simulation. The experimental results show that the rheological model of AAS-UNDP and cement basted underwater non-dispersible paste (CB-UNDP) are consistent with the Herschel-Bulkley model. The results of molecular dynamics simulation show that the anions in PAM and the OH− alkali-activated slag cementitious material (AASCM) can produce repulsive force, so the potential energy of the AASCM is lower than the potential energy of the cement based cementitious material (CBCM).The mean square displacement (MSD) value and self-diffusion coefficient of PAM in the AASCM are higher than those of CBCM, indicating that the diffusion rate of particles in the AASCM is better than that of CBCM.
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Abbreviations
- D :
-
Self-diffusion coefficient (m2/s)
- k :
-
Consistency coefficient
- n :
-
Power exponent
- r i(t):
-
The position of the particle at time t (m2)
- r i(0):
-
The position of the particle at original time (m2)
- t :
-
Movement time
- γ :
-
Shear rate (s−1)
- η :
-
Plastic viscosity (Pa·s)
- τ :
-
Shear stress (Pa)
- τ 0 :
-
Yield stress (Pa)
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Acknowledgments
This research was funded by the National Natural Science Foundation of China (Grant No. 51972337) and the National Key R&D Program of China (Grant Nos. 2019YFE0118500, 2019YFC1904304).
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Zhang, Z., Ji, Y., Ma, Z. et al. Effect of Polyacrylamide on Rheological Properties of Underwater Non-dispersible Paste of Alkali-Activated Slag. KSCE J Civ Eng 26, 236–247 (2022). https://doi.org/10.1007/s12205-021-0090-1
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DOI: https://doi.org/10.1007/s12205-021-0090-1