ON THE EFFECT OF REINFORCEMENT ON EARLY-AGE CRACKING IN HSC-BRIDGE FLANGES

In a bridge flange made of HSC (high strength concrete) the predicted number of cracks overestimates by far the observed number of cracks. In a recently performed research project it was aimed to gain more insight into this phenomenon and the behaviour of hardening reinforced HSC in general. Therefore the effect of reinforcement on early-age cracking in HSC has been tested on reinforced specimens in a temperature stress testing machine. In addition, the free deformations of a plain and a reinforced specimen were investigated. Furthermore, the development of cube compressive strength, pull-out strength and E-modulus were determined. In order to separate thermal effects from autogenous shrinkage, experiments were not only performed under realistic (semi-adiabatic) but also different isothermal (20, 30 and 40 degrees C) temperature conditions. It was found that reinforcement can induce smaller cracks which leads to an increase of the strain of the bridge flange before major cracks occur. In addition, a new bond stress-slip relation was developed for early-age HSC. With the help of these two results it can be explained why fewer cracks were found in the bridge flange than predicted. For the covering abstract see ITRD E122906.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0947644539
• Corporate Authors:

  ENGINEERING TECHNICS PRESS

  46 CLUNY GARDENS
  EDINBURGH,   United Kingdom  EH10 6BN
• Authors:
  • SULE, M
  • van Breugel, K
  • VAN DER VEEN, C
• Publication Date: 2003

Language

• English

Media Info

• Features: References;
• Pagination: 14 p.
• Serial:
  • PROCEEDINGS OF THE 10TH INTERNATIONAL CONFERENCE AND EXHIBITION - STRUCTURAL FAULTS AND REPAIR CONFERENCE 2003, HELD LONDON, JULY 2003 - CD ROM
  • Publisher: ENGINEERING TECHNICS PRESS

Subject/Index Terms

• TRT Terms: Bridges; Concrete curing; Conferences; Cracking; Forecasting; High performance concrete; Material reinforcement; Strength of materials; Temperature
• Uncontrolled Terms: Early age concrete
• ITRD Terms: 3455: Bridge; 8525: Conference; 5211: Cracking; 4721: Early age concrete; 132: Forecast; 4783: High performance concrete; 9111: Reinforcement (gen); 5544: Strength (mater); 6722: Temperature
• Subject Areas: Bridges and other structures;

Filing Info

• Accession Number: 00982833
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-947644-53-9
• Files: ITRD
• Created Date: Dec 2 2004 12:00AM