Aci self consolidating concrete
Much of the experimental work to date on SCC has focused on gray cement, but there are opportunities for white cement formulations.
Concrete producers know that there is quite a bit of development associated with any mix design.
Delivery methods include cast-in-place, precast, and tilt-up, and in every case, good appearance is essential.
Achieving good surface characteristics requires thorough consolidation of the fresh concrete and thoroughly filled forms.
The uniformity of an SCC mixture reduces the permeability and enhances the overall durability of the concrete.
This, in turn, enhances the lifespan of the SCC beyond that of conventional concrete (Corinaldesi 2005); thereby reducing the environmental footprint on a unit time basis.
SCC provides benefits beyond those of conventional concrete in all three aspects of sustainable development: economic, social, and environmental.
The most important benefit of SCC is the increase in durability.
While high doses of superplasticizers can create a very fluid concrete that flows readily, the concrete will segregate if the mortar is too thin to support the weight of the coarse aggregate.
The key to creating SCC, also referred to as self-compacting, self-leveling, or self-placing concrete, is to produce a very flowable mortar that retains a viscosity great enough to support the coarse aggregate.
Fortunately, this also leads to a durable material because water, precipitation, and aggressive chemicals or ions are shed by the surface skin.
Conventional concrete is placed using vibrators to fill the forms.
These standards will be used in the mix design process of SCC as well as a quality control tool.