COMPARISON BETWEEN LIGHTWEIGHT AGGREGATE CONCRETE AND CONVENTIONAL CONCRETE IN CONCRETE BRIDGE CONSTRUCTION-ENGINEERING AND ECONOMIC ASPECTS

TEKNISK-EKONOMISK JAEMFOERELSE MELLAN BETONGBROAR UTFOERDA I LAETTBALLASTBETONG OCH KONVENTIONELL BETONG

A study is made of the engineering and economic aspects of Swedish bridge projects in order to form an estimate of the competitive nature of the material used, light-weight aggregate concrete. First it is necessary to examine the relevant regulations and standard specifications. Design rules, etc, for structural members provided with non-prestressed reinforcement have already been standardized in Sweden. In the case of the prestressed concrete, the most obvious drawback is the effect of the increased creep and shrinkage losses. A study of the formwork costs for two significant bridges indicated that the corresponding savings range from 7.30 to 26.50 Swedish crowns per cubic meter of concrete. For the Lake Albysjoen Bridge, which is an underground railway bridge south of Stockholm, the total saving varies from 49 to 84 crowns per cubic meter of concrete according to the assumptions which concern the formwork equipment. For the road bridge at Frescati in the north part of Stockholm, the saving estimated in the same way amounts to approximately 54 crowns per cubic meter of concrete. The greatest savings are due to the following factors: (1) foundations on piles of great or medium length, (2) heavy superstructure, that is the dead load being equal to at least 50 per cent of the design loads, and (3) formwork bridging over relatively great lengths of span, e.g. over highways or railways. /TRRL/

  • Availability:
  • Corporate Authors:

    Cement och Betonginstitut

    Drottning Kristinas Vaeg 26
    Stockholm 70,   Sweden 
  • Authors:
    • Alkbrant, F
  • Publication Date: 1973

Language

  • Swedish

Media Info

  • Features: Figures;
  • Pagination: p. 23-26
  • Serial:
    • Nordisk Betong
    • Volume: 17
    • Issue Number: 4
    • Publisher: Nordiska Betongfoerbundet
    • ISSN: 002913070029-1307

Subject/Index Terms

Filing Info

  • Accession Number: 00083311
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: May 29 2003 12:00AM