## 3 Results and Discussion
### Rheological Property Analysis
#### 3.2.1 Rheology Model Fitting and Initial Rheological Parameters
Therefore, the ability of the slurry to resist deformation gradually increased when the shear stress was lower than a certain value [62; 63]. This may be because, in the case of higher HCDA mass concentration, the particles absorb water to form clusters and connect with each other to form a network structure, which leads to difficult mixing and the mixture not flowing easily, and as the proportion of GBFS increases, GBFS particles will destroy the flocculation structure formed by the des  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Item** & **Yield Stress** & **Consistency** & **Power Law** & **R2** & **Plastic** \\  & **(Pa)** & **Index (Pa\(\cdot\)s\({}^{\mathbf{g}}\))** & **Index** & **R2** & **Viscosity (Pa\(\cdot\)s)** \\ \hline Control & 0.269 & 0.5133 & 1.1527 & 0.998 & 0.9868 \\ A1-HCDA95 & 0.684 & 0.3773 & 1.2985 & 0.996 & 1.3567 \\ A2-HCDA85 & 0.171 & 0.2983 & 1.2568 & 0.998 & 0.8966 \\ A3-HCDA80 & 0.0  
Figure 6b shows that as the PCE dosage increased from 0.3% to 1.8%, both the yield stress and the plastic viscosity increased gradually at first, reaching a maximum at the B2-PCE1.2 group, and then decreased. Some studies also show that at low dosages of PCE, the yield stress of the paste could be even higher than that of the unadded samples [65,66]. When PCE dosage is small, part of the \"card house\" structure formed by HCDA in the slurry is linked by PCE molecules, which leads to a more stable structure, manifested by a higher plastic viscosity and yield stress. Meanwhile, after the destruction of the \"card house\" structure, the solid particles are susceptible to the adsorption of PCE linkage, resulting in its plastic viscosity and yield stress with the increase in dosage. When the dosage is high enough, the linking effect of PCE molecules is weakened and adsorbed on the particle surface to produce repulsive force, exacerbating the Brownian diffusion motion of solid particles, which disperses particles to release more free water, which greatly enhances the rheological properties [67]. By observing Figure 6c, it can be seen that when no activator was added, the yield stress and plastic viscosity were higher at that time. On the other hand, when SS doping was 0.5%, the yield stress was significantly reduced. This was due to the plasticizing effect: oligomers adsorbed on the HCDA and GBPS particle surface, thus leading to inadequately dissolved Ca\({}^{2+}\) in the solution and higher repulsive forces in the bilayer, while yield stress gradually increased with the increase in SS doping and reached the maximum value. The reason is that as the doping increases, the silicate oligomer content increases, as well as the pH value, which means that it is able to dissolve the slag quickly, so the mixture has a higher content of both Ca\({}^{2+}\) and silicate oligomers, enhancing attraction and flocculation [68]. The amount of the initial C-(A)-S-H gel generated also increases, which enhances the interactions between particles, thus greatly increasing the yield stress [69]. When SS was added, the plastic viscosity appeared to be significantly lower than that of the no-addition group, which is also due to the increase in silicate oligomers leading to an increase in electrostatic repulsion  
Figure 6: Initial rheological parameters of DSPB slurry with different dosages of (**a**) HCDA, (**b**) PCE, and (**c**) SS. on the particle surface, so the plastic viscosity was reduced. The Na\({}_{2}\)O-nSiO\({}_{2}\) solution itself had a high viscosity, so the plastic viscosity increased slightly with the increase in dosage [68].