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

Figure 7

Microstructure of repair mortars observed by scanning electron microscope (SEM). (R) ordinary repair mortar; (A1) SBR dispersion formed film in mortar; (A2) SBR film attached on the hydration products; (A3) SBR film attached on the surface of aggregate; (B1) SAE dispersion formed film in mortar; (B2) SAE dispersion film attached on the surface of aggregate; (C1) SAE powder formed film in mortar; (C2) SAE powder film in the hole of mortar; (C3) SAE powder film in the crack of mortar.