Title:
Products & Practice Spotlight: Repair of ASR-Damaged Piles
Author(s):
Mo Ehsani, Stephen Day, and Tony White
Publication:
Concrete International
Volume:
39
Issue:
4
Appears on pages(s):
61-65
Keywords:
jacket, FRP, laminate, pressure
DOI:
10.14359/51689847
Date:
4/1/2017
Abstract:
In 2000, severe cracking due to alkali-silica reaction was noted in piles supporting a bridge over the tidal estuary of the Barron River near Cairns, Queensland, Australia. After 14 years of searching for a system that could protect the piles and provide confinement to combat further damage, the PileMedic® system was selected. The adopted solution met these goals, could be rapidly and safely installed, and provided major savings compared to the original reinforced concrete encasement option.
Related References:
1. Carse, A.H., “Report on the Mechanism Causing Cracking in the Prestressed Piles of the Houghton Highway Bridge,” Queensland Department of Transport, 1992.
2. Ehsani, M., “FRP Super Laminates Present Unparalleled Solutions to Old Problems,” Reinforced Plastics, V. 53, No. 6, Aug.-Sept. 2009, pp. 40-45.
3. Saadatmanesh, H.; Ehsani, M.R.; and Li, M.W., “Seismic Strengthening of Concrete Columns with Fiber Composite Belts,” Proceedings of the 1992 Materials Engineering Congress – Materials: Performance and Prevention of Deficiencies and Failures, ASCE, Atlanta, GA, 1992, pp. 677-690.
4. Ehsani, M., and Tipnis, A., “Miami Building First to Benefit from Innovative PileMedic® Jacket,” Concrete Repair Bulletin, July-Aug. 2011, pp. 16-18. (Video: http://goo.gl/DX9ItL)
5. Yang, Y.; Sneed, L.; Saiidi, M.S.; Belarbi, A.; Ehsani, M.; and He, R., “Emergency Repair of an RC Bridge Column with Fractured Bars using Externally Bonded Prefabricated Thin CFRP Laminates and CFRP Strips,” Composite Structures, V. 133, Dec. 2015, pp. 727-738. (Video: http://goo.gl/HRHzjr)
6. Dawood, M.; Karagah, H.; and Shi, C., “Repair Systems for Deteriorated Bridge Piles, Technical memorandum #4a,” TxDOT Project 0-6731, 2015, 41 pp.
7. Mohammadi, A.; Gull, J.H.; Taghinezhad, R.; and Azizinamini, A., “Assessment and Evaluation of Timber Piles Used in Nebraska for Retrofit and Rating,” Draft Final Report, Nebraska Department of Roads, Apr. 2014, 51 pp.
8. ACI Committee 440, “Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-08),” American Concrete Institute, Farmington Hills, MI, 2008, 76 pp.