Consolidating concrete vibration
Ready mixed concrete is proportioned and mixed off the project site.
The exterior structural walls were built with a combination of lighweight autoclaved aerated concrete blocks (AAC), and traditional poured-in-place concrete.Lightweight concrete weighs less because it is made with an aggregate called pumice, a naturally light mineral. Perhaps the easiest and most accurate way to calculate the concrete density is to measure some into a container of known volume and weighing it.One value of understanding, knowing, and monitoring the density of concrete is checking strength by using test cylinders.This is very important considering all the high strength projects (bridges, high rises, dams) concrete is used for.For people considering concrete counter tops or interior radiant floor heating, you may be wondering if using lightweight concrete would help to minimize stress on the cabinetry and flooring below.It is also used in all types of buildings for either structural support as beams and columns, as well as for floors, walls, and roofs.
Ready mixed concrete has many environmental benefits during construction and for the life of the structure.
With a standard thickness of 1.5 inches, normal weight concrete weighs about 18 lbs per square foot while lightweight concrete weighs 14.5 lbs per square foot.
The 3.5 lbs per square foot weight savings is not usually enough to make a significant difference with concrete counter tops and normal density concrete is easier to polish.
A reduced density of normal concrete almost always means a higher water content which means lower strength concrete.
These strength tests can be done at 24 hrs, 7 days, and 28 days in a lab to predict possible strength downturns (or lower density).
Specialized paving equipment may be used to mix and spread concrete for pavement.