Abstract
This study investigates the performance of polymer concrete (PC) overlays after short-duration vehicle fire exposure. A vehicle fire test was conducted on a reinforced concrete slab with polyester PC overlay. Test results show a notable decline in overlay performance after the fire. In high-exposure areas, average reductions ranged from 13.3% to 23.1% in skid resistance, abrasion resistance, chloride penetration resistance, and surface hardness. Heat exposure heightens the bond failure risk and causes overlay delamination. Water penetration tests, done separately, show extended fire worsens PC overlay damage. These findings guide future performance improvements of PC.
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