Views: 0 Author: Site Editor Publish Time: 2026-06-26 Origin: Site
Epoxy coated PC strand offers superior corrosion protection for prestressed concrete structures compared to bare strand. While it costs more upfront, its durability often justifies the investment in harsh environments.
Prestressed concrete (PC) strand consists of high-strength, seven-wire steel cables used to pre-compress concrete, enhancing load-bearing capacity in bridges, buildings, and piles. Bare PC strand meets standards like ASTM A416 with tensile strengths up to 1860 MPa. Diameters range from 9.53 mm to 17.78 mm, supporting applications like post-tensioned slabs and stay cables.
Epoxy coated PC strand adds a resin layer (0.38-1.15 mm thick) over the steel, filling internal voids and interstices to block moisture and corrosives. Produced via ultrasonic cleaning, heating, electrostatic spraying, and curing, it adheres strongly without cracking during stressing. This meets ASTM A882, with options for grit finishes to control concrete bonding.
Epoxy coating excels in corrosion resistance, outperforming galvanized strand in salt spray tests over 1,000 hours. It reduces wire-to-wire friction, boosting fatigue performance for cyclic loads in bridges. Chemical and abrasion resistance extends service life, preventing stress corrosion cracking.
Epoxy coated strand costs 10-20% more than bare due to added processes like coating and quality checks. Galvanized options add 10-15% premium but offer less protection. Initial price for 12.7 mm strand might exceed bare by $100-200 per ton, depending on market.
Aspect | Bare PC Strand | Epoxy Coated PC Strand | Notes |
Upfront Cost/Ton | Baseline ($800-1000) | +10-20% ($880-1200) | Varies by region/supplier |
Corrosion Protection | Moderate | Superior (100+ years) | Salt/marine environments |
Fatigue Resistance | Standard | Enhanced | Reduced fretting |
Maintenance | Higher long-term | Lower | Fewer repairs |
Corroded bare strands cause failures like Italy's Saint Stefano Bridge collapse after 40 years from pitting. Corrosion reduces prestress by 50-70% via mass loss and cracking. Epoxy versions fill voids, resist hydrostatic pressure, and maintain strength in marine or deicing salt exposure.
Ideal for coastal bridges, cable-stayed structures, soil anchors, and piling exposed to salts. Used in segmental bridges, hollow core slabs, and external tendons without extra grouting. In aggressive settings, it cuts lifecycle costs by minimizing inspections and repairs.
Invest if project faces chlorides, seawater, or 50+ year design life—durability offsets premium via 20-30% lifecycle savings. For dry, inland use, bare suffices. Calculate ROI: epoxy's 100-year projection in seawater vs. bare's 40-year risks. Contact suppliers like TJ Wasungen for quotes.
Tianjin WASUNGEN Metal Products Co., Ltd. produces ASTM-compliant epoxy coated PC strand 12.7 mm with filled epoxy for bridges. Reach them at
or +86-13622011252 for custom specs. Their process ensures low pinholes and high tensile loads (183.7 kN min break).
