Self consolidating grout
Grout is a highly fluid mixture of cementitious materials, aggregate, and water, used to solidly fill spaces around reinforcement and anchorage.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.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.In either form, the majority of corefill grout is used with concrete masonry units, while only a small percentage is used with clay brick construction.With the low-lift method, grout is placed as the courses are laid.
Instead, SCC gains its fluid properties from an unusually high proportion of fine aggregate, such as sand (typically 50%), combined with superplasticizers (additives that ensure particles disperse and do not settle in the fluid mix) and viscosity-enhancing admixtures (VEA).
Fine grout (sand aggregate only) may be used in all applications and is required when the grout space is small.
Coarse grout contains aggregate up to 3/8” size and is an economical mix commonly used for reinforced masonry construction.
With the seemingly constant changes to lift heights and required consolidation in the codes, there seems to be some confusion out there as to the what, when, where, how and why concerning the consolidation of grouted masonry cells.
This article will help to demystify masonry grout and vibration products, and their usage.