Assertion: mortar's additive | /r/CapableOf | enhance plasticity
Facets:
Source sentences:
text: No definitive study has determined whether air-entraining additives should be used to resist frost action and enhance plasticity, but in areas of extreme exposure requiring high-strength mortars with lower permeability, air-entrainment of 10-16 percent may be desirable (see formula for "severe weather exposure" in Mortar Type and Mix).
text: Additives or plasticizers are commonly added to increase its flexibility.