DEFORMABLE EXPANDED - POLYSTYRENE CONCRETE FOR TUNNEL SEGMENT JOINTS

It has been shown that a suitably shaped and reinforced concrete can be made that yields progressively as the applied load is increased, even when the concrete is crushed to less than half the initial height. This paper discusses the application of this technique in the control of strata movement around a tunnel. Previous work on mine supports suggested that epc, a concrete of expanded - polystyrene spheres in a cement paste matrix, would show suitable crush characteristics for the pad material used to form the radial joints between precast concrete segment linings in the tunnel. The epc was made by stirring expanded - polystyrene granules, 1 to 3 mm diameter into an ordinary portland cement paste. Tests are described, both in the laboratory and in application that indicated that such a concrete provided the yield characteristics needed for a specified strata control problem.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Corporate Authors:

  Cement and Concrete Association

  52 Grosvenor Gardens
  London SW1W 0AQ,   England 
• Authors:
  • Brown, J H
• Publication Date: 1976-1

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 28-30
• Serial:
  • CONCRETE
  • Volume: 10 N
  • Issue Number: 1
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Cross sections; Crushing; Expanded materials; Expansion; Joints; Loads; Modulus of deformation; Polystyrene; Polyvinyl hydrocarbons; Precast concrete; Reinforced concrete; Strength of materials; Tunnels
• Old TRIS Terms: Joint
• ITRD Terms: 6404: Cross section; 5176: Crushing; 4502: Expanded material; 2998: Joint (structural); 5567: Load; 7422: Polyvinylhydrocarbon; 4792: Precast concrete; 4794: Reinforced concrete; 5544: Strength (mater); 3374: Tunnel
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I25: Design of Tunnels;

Filing Info

• Accession Number: 00134209
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 16 1976 12:00AM