Masonry grout may be mixed on site or delivered in ready-mix trucks. All grout is to have a slump of between 8 and 11 inches, and a compressive strength exceeding 2,000 psi.
Fine grout (sand aggregate only) may be used in all applications and is required when the grout space is small.
Another advantage of SCC is that the time required to place large sections is considerably reduced.
In Japan, the volume of SCC in construction has risen steadily over the years.
Grout is required to be placed at a slump of 8 to 11 inches – a very wet mix – to flow into the grout space.
Excess water in the mix does not adversely affect grout strength as it is absorbed by surrounding masonry.
A recent code change by the Masonry Standards Joint Committee has allowed Self-Consolidating Grout (SCG) to be used in placements higher than 5 feet but lower than 12’-8” in masonry walls, without the need for external vibration.
SCG allows for a complete placement through congested reinforcement.