THE LIGHTWEIGHT AGGREGATE CONCRETE BRIDGE AT REDESDALE

The use of lightweight aggregate concrete in a 17M span bridge carrying a forest road over a river is described. The bridge deck consists of prestressed precast concrete inverted T-Beams having in situ infilling and surfacing concrete. A lightweight coarse aggregate and natural sand were used for the precast concrete but only lightweight materials were used for the in situ concrete. Satisfactory strength and elastic properties were obtained with reductions in density of about 20 per cent for the precast and about 25 per cent for the in situ concrete. Measurements made on the structure show that time dependent strains are smaller than expected and are due mainly to creep of the concrete. Some seasonal variation due to shrinkage occurs but its effect is generally small, probably due to low moisture losses in the damp environment of the bridge. Loading tests on the bridge confirmed that its behaviour was as expected. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03051315
• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Higgins, G E
  • LOE, J A
  • Howells, H
• Publication Date: 1983

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 30 p.
• Serial:
  • Supplementary Report
  • Publisher: Transport and Road Research Laboratory (TRRL)
  • ISSN: 0305-1315

Subject/Index Terms

• TRT Terms: Aggregates; Bridge decks; Bridge members; Concrete; Creep; Field tests; Fine aggregates; Forest roads; Length; Lightweight aggregates; Lightweight concrete; Lightweight materials; Load tests; Loads; Losses; Measurement; Mechanical elasticity; Mechanical strain; Moisture content; Precast concrete; Prestressed concrete; Sand; Seasons; Shrinkage; Strength of materials; Tests; Time dependence
• Uncontrolled Terms: Bridge spans; Concrete strength; Loading; Seasonal variations
• Geographic Terms: United Kingdom
• Old TRIS Terms: Concrete creep; Concrete shrinkage; Natural sand fine aggregate; Time dependent parameters
• ITRD Terms: 4577: Aggregate; 3482: Bridge deck; 4732: Creep (mater); 5595: Deformation; 6226: In situ; 9038: Lightweight; 4740: Lightweight concrete; 5567: Load; 6136: Measurement; 4792: Precast concrete; 4796: Prestressed concrete; 3452: Span; 6255: Test; 8119: United Kingdom
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; Materials; Planning and Forecasting; I24: Design of Bridges and Retaining Walls; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00386205
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: SR 788 Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Jul 30 1984 12:00AM