A thin epoxy overlay application is a capital preventive maintenance activity. Epoxy overlays reduce the rate of chloride ion ingress and extend bridge deck service life. Highway agency policies and manufacturer specifications require maintaining a 28-day curing period (7-day wet and 21-day dry curing) before the application of an epoxy overlay on bridge decks requiring new concrete for patches and repairs. Consequently, the contractors wait for 28 days to apply an epoxy overlay. Delaying application time increases project completion time and the cost of construction and mobility. The suitability of new concrete to receive epoxy overlays and the performance of overlays depend on several parameters including concrete strength, moisture, and tendency to crack. Such parameters depend on concrete mixture ingredients and wet and dry curing periods. This paper presents a performance-based procedure for evaluating the possibility of reducing the 28-day waiting period for a thin epoxy overlay application on new concrete. An experimental program was developed and executed to evaluate the impact of epoxy overlay application parameters and overlay performance using a tensile bond pull-off strength test. The results support developing a performance-based procedure for deciding on the suitable age of new concrete to receive a thin epoxy overlay. The pull-off bond strength of epoxy overlays applied at 7, 14, and 21 days, following a 7-day moist curing, shows the possibility of applying an epoxy overlay before the end of the 28-day curing period stipulated in the current specifications.

薄环氧树脂覆盖应用是一项资本预防性维护活动。环氧树脂覆盖层降低了氯离子进入的速度并延长了桥面板的使用寿命。公路机构的政策和制造商规范要求在需要新混凝土修补和维修的桥面板上应用环氧树脂覆盖层之前，保持 28 天的固化期（7 天湿固化和 21 天干固化）。因此，承包商需要等待 28 天才能应用环氧树脂覆盖层。延迟申请时间会增加项目完成时间以及建设和流动成本。新混凝土是否适合接受环氧树脂覆盖层和覆盖层的性能取决于几个参数，包括混凝土强度、湿度和开裂倾向。这些参数取决于混凝土混合物成分和干湿养护时间。本文提出了一种基于性能的程序，用于评估减少新混凝土上薄环氧树脂覆盖层应用的 28 天等待期的可能性。开发并执行了一个实验程序，以使用拉伸粘合拉脱强度测试来评估环氧树脂覆盖层应用参数和覆盖层性能的影响。结果支持开发基于性能的程序，用于决定新混凝土的合适年龄，以接收薄环氧树脂覆盖层。在 7 天湿固化后，在第 7、14 和 21 天施加的环氧树脂覆盖层的剥离粘合强度表明，在当前规范规定的 28 天固化期结束之前应用环氧树脂覆盖层的可能性.