Correlation of Surface Chloride Concentration of a Pile Exposed to the Marine Environment to the Adhesiveness of a Commercially Available Epoxy.
Abstract
The U.S. Navy is studying the use of carbon fiber reinforced plastic (CFRP) for retrofitting the strengths of piers and piles. The CFRP is adhered to the piers and piles with a commercial adhesive. Several of those investigations have been (and are being) conducted at the Naval Facilities Engineering Service Center (NFESC) at Port Hueneme, California. One area of investigation relates to the effectiveness of the epoxies under different environmental exposures of the concrete. Most other investigations have been conducted with "virgin" concrete samples of pier and pile. A pile that has been exposed to marine conditions for approximately 4 years was removed from the harbor at Port Hueneme. The pile was transferred to the NFESC service yard at which point several parameters for the adhesiveness of an epoxy to the concrete pile surface were investigated. The effect of chloride levels, with and without hydroblasting surface preparation, on the adhesiveness of an epoxy applied to the surface of the pile, with and without the application of primer, was investigated. The laboratory analysis of chloride levels on the surface of the concrete pile and the pull-off forces of the adhesive were the principal parameters upon which the research was focused. In general it was found that adhesion would somewhat decrease with chloride content. The use of hydroblasting and pretreatment with a primer increased the adhesion in all cases, and both are recommended.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1998
- Accession Number
- ADA358635
Entities
People
- J. A. Beran
Organizations
- Texas A&M University