Compared to heavier grouts, cellular concrete is lightweight and highly fluid, resulting in the following advantages:
Cellular concrete is routinely used to fill cracks, crevasses, and voids that form around tunnels during the boring process, and to fill around carrier pipes. Because of its low density, the buoyant and hydrostatic forces exerted on carrier pipes are much less than traditional grouts. Also, the closed-cell structure of CEMATRIX Cellular Concrete results in a low permeability material that inhibits water flow.
Culvert relining and other utility projects usually require the annular space between casing and carrier pipe to be filled with grout. The spaces are often narrow, and multiple pipes may be present. The low density of cellular concrete results in substantially less buoyant and hydrostatic forces exerted on carrier pipes, and the highly fluid nature of the product ensures complete filling.
In order to reduce the cost of open cut and removal, it is common practice to abandon below ground pipes in-place. In order to prevent future subsidence or potential migration of contamination, these pipes must be filled with grout. Cellular concrete is the ideal choice to quickly and economically abandon these utilities.
Cellular concrete is used as flowable fill in many situations, such as: