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EGR170-Lesson 3

Mortar

QuestionAnswer
Cementitious materials Materials that provide the bonding ingredient in mortars. Masonry cement, Portland cement, Blended hydraulic , Pozzolan modified Portland cement, Hydrated lime for masonry purposes, and Quicklime for structural uses.
Mortar flow Mortar flow influences tensile bond strength. As the water content increases, the bond strength increases.
Tensile bond strength The bond strength available for resisting forces that tend to pull masonry units apart.
Efflorescence Water containing soluble salts will cause the mortar to effloresce. Efflorescence is a white powdery substance that discolors the mortar and masonry units.
Suction rate Suction rates of masonry units influence bond. Masonry units will pull water from the mortar, resulting in a poor bond.
Water retention Good water retention to resist rapid loss of mixing water to the air or an absorptive masonry unit. Mortar that has good water retentivity remains workable, enabling masons to properly place masonry units.
Mortar Mortar is the bonding agent used to join masonry units into an integral structure.
Created by: rbartholomy