IMG_3082 Foamed concrete Slabs and screeds

Foamed concrete Slabs and screeds

Using Foam Concrete for light weight, thermally insulating Floors, slabs and Screeds

Screeds are regularly produced indoors and outdoors. Whilst a typical screed might only be a few millimeters thick, foamed concrete screeds are thicker. Benifits of using Foamed concrete for this aplication include overal weight, thermal insulation and easy encapsulation of services or other awkward shapes.

To achieve desirable foamed concrete characteristics such as pump ability, flow, and workability Propump engineering have developed many different mix designs to achieve varying densities and strengths.  Many ready-mix batching plants around the country can produce our base material.

The addition of air and water to any cementitious volume exponentially reduces the compressive strength. Therefore, a typical foamed concrete has a strength range from .75N/mm2 to ~ 8 –   10N/mm2 before the pump-able distance or workability times become an issue.

lightweight foamed concrete screeds are specified to reduce the static load on a given structure, or to allow for easy excavation, given the materials inherent stability. Recently more foam concrete has been specified at low densities simply because of its’ thermal insulation values. In some cases, denser, heavier foamed concretes are specified.

Propump recommend that a foamed concrete screed or slab is a minimum of 150mm thick. A typical foamed concrete screed would be around 500 kg/m3 in density. For example; for 1 cubic metre of foamed concrete, 75% of the volume would be Foam.

In pictures: Royal School Bath.

Material: 500 KG/m3 Foamed concrete
Pumped over 150 metres with 2.5” line
150mm slab thickness, poured in 2 phases.

In pictures: Hangar Lane Housing Developments.

Material: 500 KG/m3 Foamed concrete
Pumped over 100 metres with 3” line 500mm slab thickness, poured in 2 phases. Across 14 separate bays, each pour volume was approximately 50m3

Foamed concrete is somewhat self-levelling, however, we do not currently provide a service for floating or leveling. Importantly, Propump will endeavour to work with you to achieve any results you wish. It is important to plan suitable pour areas and volumes so as not to disturb fresh or semi -set material.