Foamed Concrete Screeds – Foamed Concrete Specialists - Propump Engineering Ltd

Foamed Concrete Screeds

Foamed concrete screeds

The high air content, and consequently, low density of foamed concrete screeds make them ideal for use on floor and roof structures. Dead-loading on the system is reduced. Meanwhile, achieving excellent thermal efficiency.

Screed material ranges from 50mm to 1000mm in thickness. In addition, foam concrete is pumped and laid/ finished with ease. For example, common densities range between 500Kg/m³ – 800Kg/m³. Strengths of 1 Newton to 3 N/mm² are a result. However, a 500kg/m³ mix will provide the best thermal figures when requesting optimum thermal efficiency.

Unlike traditional latex or specialist screeds, Foamed concrete screeds benefit from deeper pours. For example, 50mm is the minimum a foamed concrete will be poured, whilst traditional materials will only be placed 2-3 mm.

Royal School, Bath, Somerset. Foamed Concrete screed

P1100 Density: 500kg/m³, Screed Depth 150mm. Each bay of foamed concrete is 40 metres long by 3 metres.

150mm thick foam concrete screeds used to thermally insulate water reservoiurs and reduce loading to enable a quiet "contemplation garden"
150mm thick foam concrete screeds used to thermally insulate water reservoiurs and reduce loading to enable a quiet “contemplation garden”
Foamed concrete screeds poured in a "hit and miss" process that enables  shuttering to be stripped from bays before placing material the following day
Foamed concrete screeds poured in a “hit and miss” process that enables shuttering to be stripped from bays before placing material the following day
Operators using a 2.5" flexible hose to place material carefully and slowly into the shallow bays
Operators using a 2.5″ flexible hose to place foam concrete material carefully and slowly into the shallow bays
The quiet "contemplation garden" in all its recent glory preceding works, image taken from google maps.
The quiet “contemplation garden” in all its recent glory preceding works, image taken from google maps.

These water reservoirs on the school site were redesigned to become a quiet garden. However, due to the loading constraints on the roof, Propump proposed the ultra-low density foamed concrete screed of 500 kg/m³ at a thickness of 150mm. Therefore, allowing a topping layer of earth and membrane to be placed for the garden.

Over 200m³ of ultra-lightweight foam concrete was pumped a distance of around 150 linear metres through a 2.5” flexible hose and laid in a thickness of 150mm. The base mix, made of cement with very little sand, is combined with 4.5 times the equivalent volume of specialist foam to produce foam concrete. Further to this, foamed concrete was placed in a hit-and-miss order. As a result, the pour sequence was staggered. This allowed the removal of shuttering. Consequently, the Foamed concrete created stop ends for the next pour.

light weight Foamed concrete screeds manufactured in Cyprus. these thermally insulating screeds are for high rise apartment blocks
light weight Foamed concrete screeds manufactured in Cyprus. These thermally insulating screeds are for high rise apartment blocks

Westgate House, West Ruislip, London.

P1100 Density 500 kg/m³, foamed concrete Screed depth 500mm. Each bay is approximately 100m³. Project Volume: 2000m³

This project involved re-purposing a commercial building for residential status. It required dividing the floor space. Subsequently, these new dwellings require fitting utilities and services in the sub-floor. Whilst, building regulations also require a significantly higher level of insulation.

Propump Provided ultra-light foamed concrete screed. However, this screed was placed 500mm deep. During the pour, the fixed pipework and services were encapsulated by the fluid material without displacing or damaging any fittings.

Specifically, this light weight foamed concrete has about 85% air as part of its volume. Likewise, this foamed concrete has a thermal conductivity of about 0.15 WMK.

Each bay had a volume of 100m³. Consequently, two bays were poured per day; this took eight deliveries to the site.

A 500kg/m3 foamed concrete placed in two pours of 500mm, the fluid material is thermally insulating for residential buildings and will also encapsulate drainage and utilities
A 500kg/m3 foamed concrete placed in two pours of 500mm, the fluid material is thermally insulating for residential buildings and will also encapsulate drainage and utilities
Fre flowing foam concrete can be seen freely encapsulating the fitted drainage
Fre flowing foam concrete can be seen freely encapsulating the fitted drainage
Foam concrete between concrete loads  is free flowing a self levelling
Foam concrete between concrete loads is free flowing a self levelling
The final pour height of foam concrete versus a previous layer
The final pour height of foam concrete versus a previous layer

Applications

Foamed concrete Dundee university environmentally sustainable housing
Foamed concrete Dundee university environmentally sustainable housing

Bridges & Roads

Foamed concrete used extensively for Road sub bases at Dartford park  as part of the  ground remediation efforts
Foamed concrete used extensively for Road sub bases at Dartford park as part of the ground remediation efforts

Screeds

Foamed concrete use for lightweight thermally insulating screeds in cyprus
Light weight foamed concretes can be used to quickly produce screeds and light weight make up for floors in buildings and apartments, increasing thermal insulation values

Precasting

precast housing panels made with foamed concrete to provide light weight thermally insulating walls
precast housing panels made with foamed concrete to provide light weight thermally insulating walls

Sewers & Tunnels

Foamed concrete used for Crossrail tunnelling works, foamed concrete filling addits, tunnels and TBM machines
Foamed concrete used for Crossrail tunnelling works, foamed concrete filling addits, tunnels and TBM machines

Large Void Fill

Foamed concrete for large voids and mass infill, foam concretes are suitable for pumping and their flowability allows difficult to reach cavities to be filled.
Foamed concrete for large void fill, mass filling of mines, caverns and even water storage

More information

Propump Consultancy Services

Propump Engineering foamed concrete specialists site visits and consultancy services
Propump Engineering foamed concrete specialists site visits and consultancy services

Propump news & articles

Foam concrete inline production system enable the most accurate and efficient method of manufacturing foam concretes on-site
Foam concrete inline production system enable the most accurate and efficient method of manufacturing foam concretes on-site

Why choose foamed concrete?

Foamed Concrete Applications include filling of sink holes and other ground movement to support the underside of structures
Foamed concrete Applications including the use of fluid and free flowing material for the use in ground stabilisation and mass infill

Projects by Propump

Foamed concrete used for Crossrail tunnelling works, foamed concrete filling addits, tunnels and TBM machines
Foamed concrete used for Crossrail tunnelling works, foamed concrete filling addits, tunnels and TBM machines

Foamed concrete cube moulds available from stock from ProPump Engineering Ltd

Foamed concrete cube moulds

Large quantities of both 100mm and 150mm foamed concrete cube moulds are kept in stock, available to purchase on a next day delivery.

Please call the office for up to date prices on 01322 429 900 alternatively email info@propump.co.uk