FOAMED CONCRETE AS LIGHTWEIGHT FILL

SKUMBETONG SOM LAETTFYLLNING

The design of road embankments and bridges necessitates knowledge of stability and settlement problems. Loads must be adapted to soil properties. Heavy masses can be replaced by lightweight fill. Foamed concrete (FC) is a porous material of 0.4-1.6 t/m3. It consists of cement, water and foam. Foamed plastics pellets are sometimes added to reduce density. The material flows easily, is stable and durable and is easily dug. It needs no vibration. Its compressive strength is ca 1 MPa and its E modulus ca 1000 MPa. It has good thermal insulation capacity, although not as good as expanded plastics. In practical application in road projects it has been found competitive. By building embankments with FC instead of conventional fill, the load on the subgrade is substantially reduced. It can be poured directly into the bottom of the excavation on top of plastic sheeting. The highest stress on the subgrade occurs below the centre of carriageway if there is settlement. Horizontal pressure in retaining structures can be reduced by using FC. Embankments can be made of FC. Pipes and pipe culverts can be surrounded by FC. Damage to structures due to frost heave be alleviated by using FC as insulation. For the covering abstract of the conference see IRRD 890911.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/11012986
• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95

  KOMMUNIKATIONSFORSKNINGSBEREDNINGEN

  BOX 5706
  STOCKHOLM,   Sweden  S-114 97

  KOMMUNIKATIONSFORSKNINGSBEREDNINGEN

  BOX 5706
  STOCKHOLM,   Sweden  S-114 97

  KOMMUNIKATIONSFORSKNINGSBEREDNINGEN

  BOX 5706
  STOCKHOLM,   Sweden  S-114 97
• Authors:
  • CARLSTED, P
• Publication Date: 1994

Language

• Swedish

Media Info

• Features: References;
• Pagination: p. 199-208
• Serial:
  • VTI:S OCH KFB:S FORSKARDAGAR. RAPPORTSAMMANSTAELLNING AV FOEREDRAG VID FORSKARDAGARNA 1994-01-12--1994-01-13 (KFB & VTI FORSKNING/RESEARCH)
  • Issue Number: 12:3
  • Publisher: Swedish National Road and Transport Research Institute (VTI)
  • ISSN: 1101-2986

Subject/Index Terms

• TRT Terms: Concrete; Conferences; Culverts; Electric insulating materials; Embankments; Expanded materials; Insulating materials; Material reinforcement; Modulus of elasticity; Properties of materials; Reinforcing materials; Stability (Mechanics); Strength of materials; Weight
• Uncontrolled Terms: Use
• ITRD Terms: 4755: Concrete; 8525: Conference; 3360: Culvert; 2801: Embankment; 4502: Expanded material; 6914: Insulation; 5919: Modulus of elasticity; 5925: Properties; 3471: Reinforcement (in mater); 5930: Stability; 5544: Strength (mater); 9084: Use; 5485: Weight
• Subject Areas: Bridges and other structures; Materials;

Filing Info

• Accession Number: 00739151
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Files: ITRD
• Created Date: Aug 28 1997 12:00AM