ALKALI-SILICA REACTIONS IN REINFORCED CONCRETE BEAMS WITH PARTICULAR REFERENCE TO BEARING CAPACITY --PROCEEDINGS OF THE 7TH INTERNATIONAL CONFERENCE ON CONCRETE ALKALI-AGGREGATE REACTIONS, OTTAWA, CANADA, 1986

This paper contains a brief description of a laboratory research program on alkali-silica reactions (asr) in reinforced concrete beams (4300x180x360 mm), concrete prisms (600x100x100 mm), and concrete test cylinders (o100x200 mm). The purpose of the investigation was to clarify a connection between a visual evaluation of damage of a beam and the shear and Anchorage strength. Thin sections and polished concrete slabs from the test beams were investigated in the laboratory. Three weeks after casting and subsequent wet curing some of the beams were stored in a saturated nacl solution at 50 deg c. During the storage period longitudinal and transverse expansions were measured. After different storage periods, the extent of damage in the beams was evaluated, and the load carrying capacity of the beam in shear was tested in a test set-up. Registration as regards a damage grading scale from 0-4 comprised the concrete surface as well as the interior of the concrete. The number, extent, appearance of alkali silica (as) gel deposits, popouts and cracking of the surface were registered. The interior of the concrete was evaluated on the basis of a microstructural description of reacting sand particles, the crack system, and interior as gel deposits. To date 13 concrete beams have been cast, and some of the preliminary results presented in this paper. For the covering abstract of the conference see IRRD 811982.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0815511426
• Corporate Authors:

  NOYES PUBLICATIONS

  MILL ROAD
  Park Ridge, NJ  United States 
• Authors:
  • THORSEN, T S
• Publication Date: 1987

Language

• English

Media Info

• Pagination: p. 146-51
• Serial:
  • Publication of: NOYES PUBLICATIONS
  • Publisher: NOYES PUBLICATIONS

Subject/Index Terms

• TRT Terms: Alkali; Anchorages; Beams; Bearing capacity; Chemical reactions; Colloids; Concrete; Conferences; Cracking; Cylinders; Evaluation and assessment; Expansion; Loss and damage; Oxides; Prisms; Reinforced concrete; Shear strength; Silicon; Slabs; Sodium chloride; Strength of materials
• Subject Areas: Data and Information Technology; Planning and Forecasting;

Filing Info

• Accession Number: 00481138
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0-8155-1142-6
• Files: ITRD, TRIS
• Created Date: Apr 30 1989 12:00AM