Effect of Latex Film Distributions on Flexibility of Redispersible Polymer Powders Modified Cement Mortar Evaluated by SEM

Effect of latex film distributions on flexibility of redispersible polymer powders modified cement mortar were evaluated by scanning electron microscopy (SEM). Latex film distributions such as forming interpenetrated networks embedded in cement pastes, covering cement hydrates locally, bonding cement hydrates together, bridging aggregates were all beneficial for the improvement of flexibility of cement mortar. Latex film distributions such as remaining single particles in cement mortar, completing film formation unsuccessfully, film formation on surfaces of aggregates, bonding cement minerals to surfaces of aggregates may contribute little to the improvement of flexibility of cement mortar.