Coarse grout contains aggregate up to 3/8” size and is an economical mix commonly used for reinforced masonry construction.
See the Building Code Requirements and Specification for Masonry Structures Specification Table 7 for grout space requirements.
Common formulations for site-mixed grout are: Fine Grout - 1 part cement to 3 parts sand (by volume) Coarse Grout - 1 part cement, 3 parts sand, and 2 parts gravel Low lift grouting: For low lift grouting, walls are built to 5 feet or less, and vertical reinforcement is then placed into hollow cells or reinforced cavities.
Grout is placed in one continuous pour to the top of the wall and consolidated before building an additional 5 feet of masonry.
The Colosseum in Rome was built largely of concrete, and the concrete dome of the Pantheon is the world's largest unreinforced concrete dome.
This paper reports on the consolidation of no admixture self-consolidating grout made by substituting high percentages of Portland cement with Type-F fly ash and/or GGBFS. The relative reinforcement consolidation was assessed by comparison to traditional mechanically consolidated grout and also compared to criteria of ACI technical notes for shotcrete.
The percent replacement ranged from 50% to 80% by volume.
Additionally some complex forms cannot easily be vibrated.
Grout is a highly fluid mixture of cementitious materials, aggregate, and water, used to solidly fill spaces around reinforcement and anchorage.