DEVELOPMENT OF A FLY ASH AND EPOXY BASED HIGH-PERFORMANCE GROUT FOR THE REPAIR OF OFFSHORE PLATFORMS

Offshore platforms serve as artificial bases, supporting drilling and production facilities above the elevation of waves. They can be damaged due to wave induced fatigue in synergy with chloride-induced corrosion. These structures are constructed mainly using cylindrical steel tubular members and the joints, formed at the intersection of members, are most vulnerable to fatigue. An innovative repair technique, which has made use of fly ash and epoxy based high performance grout (HPG) especially developed for this purpose and ferrocement jackets, was proposed in this investigation to rehabilitate fatigue damaged tubular joints. While the average compressive strength of the grout was 85 MPa (12.32 ksi), the average tensile strength was 52 MPa (7.54 ksi). The bond strength of the HPG was almost three times greater than the conventional cement grout. As the specific property, the bond is very high, and achieved without any effort, the term 'High Performance Grout' has been used in this paper to distinguish it from the conventional technique. The paper presents in detail the necessity and development of the fly ash and epoxy based HPG, the method of repairing the fatigue damaged tubular joint, and the testing of the repaired joint to check the efficacy of the proposed innovative techniques.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0870310267
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Thandavamoorthy, T S
  • Rao, AGM
  • Santhakumar, A R
• Conference:
  • Seventh CANMET/ACI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete
  • Location: Chennai (Madras), India
  • Date: 2001-7-22 to 2001-7-27
• Publication Date: 2001

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 239-257
• Serial:
  • Volume: 1

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Cement grouts; Chlorides; Compressive strength; Corrosion; Drilling; Epoxy resins; Facilities; Fatigue (Mechanics); Ferrocement; Fly ash; Grout; Joints; Offshore platforms; Production; Repair and maintenance businesses; Repairing; Tensile strength; Testing; Tubular structures
• Subject Areas: Bridges and other structures; Maintenance and Preservation; Marine Transportation; Materials;

Filing Info

• Accession Number: 00819566
• Record Type: Publication
• ISBN: 0870310267
• Report/Paper Numbers: SP 199-14
• Files: TRIS
• Created Date: Nov 9 2001 12:00AM