Foamed concrete - composition and properties

Publication Year
1994

Document Status
Red 
Old version of document

Abstract

Foamed concrete is a lightweight material produced by incorporating a preformed foam, into a base mix of cement paste or mortar, using standard or proprietary mixing plant. The entrapped air bubbles reduce the density of the base mix and have a strong plasticizing effect on it. Foamed concrete is free-flowing but exhibits thixotropic behaviour. It is easily placed, requires no compaction and flows into the most restricted and irregular cavities. Segregation and bleeding are also inhibited by the bubbles and the material can be pumped successfully over vertical and horizontal distances similar to those for pumpable dense concrete. Foamed concrete can be produced with dry densities of 400 to 1600kg/m³, with 7-day strengths of approximately 1 to 10N/mm² respectively. Foamed concrete is fire resistant, and its thermal and acoustical insulation properties make it ideal for a wide range of purposes, from insulating sub-bases and roof screeds, to void filling. It is also particularly useful for trench reinstatement.


Publisher Information

British Cement Association

The British Cement Association merged with the Quarry Products Association and The Concrete Centre to form the Mineral Products Association and is now known as MPA Cement. Formerly known as the Cement and Concrete Association, the British Cement Association is the trade and research organisation that represents the interests of the UK's cement industry. They have range of publications which include fact sheets, technical reports and good practice guides to support the use of concrete and cement in construction.

Riverside House
4 Meadows Business Park
Station Approach
Blackwater
Camberley
GU17 9AB
UK

Document Status Indicators

Green The Green document status indicator indicates that the document is:
  • (a) current in the Construction Information Service and
  • (b) the latest version - ie it does not have any other documents that replace or amend it and is promoted as a current document by the publisher.
Amber The Amber document status indicator indicates that some caution is needed when using this document - it is either:
  • (a) current in the Construction Information Service but has a document or documents that replace or amend it, so please look at the "Newer Versions" tab or
  • (b) not in the Construction Information Service but with another reason why it may be relevant to our customers such as being cited in NBS or in the Building Regulations Approved Documents. Again there may be more recent versions of the document.
Red The Red document status indicator indicates that the document is an old version
  • The document has likely been withdrawn by the publisher, also the meta data presented here may be out of date as it is no longer being maintained by the editorial teams at NBS.