Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material

Figure 1

Schematic c. Note: the rearrangement of FLA A chain distribution was formed by absorption mechanism and the adjustment of the chain distribution by a spatially fixed and cross-linked network of the PVAGB polymer. Sectional direction was defined for the formation of filtration control multilayers. The direction was vertical to the flowing direction of cement slurry; free water was blocked on a certain layer to keep the perfect ratio of cement to water resulting in better hydration of cementitious material; axial direction was defined for the formation of filtration control multilayers. The direction was along the flowing direction of cement slurry. And free water possibly flowed along the axial direction micropore within the cement-based material, and the hydration process of the material was partly delayed or stopped due to lack of free water.