This Technology Brief presents general information on masonry grout, discussing such topics as grout materials,
mixes, and admixtures. Knowledge of applicable standards, codes and field practices is required to thoroughly
understand masonry grout. The information contained in this guide is intended to further educate the user on grout
and grout materials.
Grout is a cementitious material, primarily composed portland cement, fine aggregate, possibly coarse aggregate and, in some cases, lime. These ingredients are combined with a sufficient amount of water to produce a fluid, flowable mixture. Grout is neither concrete nor mortar. There are distinct differences in water content and material composition
between these materials. Concrete differs from grout in that it contains a much coarser aggregate and a significantly lower water-cement ratio. Concrete is poured with a minimum amount of water into non-absorptive forms…
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