Mechanism and Durability of Repair Systems in Polymer-Modified Cement Mortars

Figure 8

Microstructure of interface between repair mortars and old concrete observed by scanning electron microscope (SEM). (R) Interface of ordinary repair mortar and concrete; (A1) SBR formed film at the surface; (A2) SBR formed filament at the interface; (B1) SAE dispersion formed film at the interface; (B2) SAE dispersion formed mesh-like products at the interface; (C1), (C2) SAE powder formed film at the interface.