Crack sealers are crucial for preserving concrete bridge decks and extending their service life. This paper presents a comprehensive national survey in the U.S., gathering responses from a total of 37 different agencies, along with literature studies on crack sealer practices in concrete bridge decks. The study covers various aspects, including available crack sealers, sealing triggers, approved product list and performance, resealing intervals, method selection, and surface preparation. Based on the study findings, epoxy, methyl methacrylate (MMA), and high-molecular-weight methacrylate (HMWM) are the most commonly used crack sealers, each offering distinct advantages. Sealing criteria are based on crack dimensions and deicing exposure. Resealing intervals vary due to sealant composition, deck age, and climate. Method selection considers deck attributes, temperature, and moisture. The study identifies gaps in consistently approved product lists and suggests future research areas, such as investigating the effects of entrapped chloride, conducting long-term performance testing, and correlating laboratory and field data. The study’s findings contribute to current practices, facilitating decision-making and providing guidance for targeted future research.

中文翻译：

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用于保护混凝土桥面的裂缝密封剂：国家调查和文献综述的综合

裂缝密封剂对于保护混凝土桥面和延长其使用寿命至关重要。本文介绍了美国的一项全面的全国调查，收集了 37 个不同机构的反馈，以及有关混凝土桥面裂缝密封剂实践的文献研究。该研究涵盖各个方面，包括可用的裂缝密封剂、密封触发器、批准的产品清单和性能、重新密封间隔、方法选择和表面处理。根据研究结果，环氧树脂、甲基丙烯酸甲酯 (MMA) 和高分子量甲基丙烯酸酯 (HMWM) 是最常用的裂缝密封剂，每种都具有独特的优势。密封标准基于裂缝尺寸和除冰暴露。重新密封间隔因密封剂成分、甲板年龄和气候而异。方法选择考虑甲板属性、温度和湿度。该研究确定了一致批准的产品清单中的差距，并提出了未来的研究领域，例如调查夹带氯化物的影响、进行长期性能测试以及关联实验室和现场数据。该研究的结果有助于当前的实践，促进决策并为未来的有针对性的研究提供指导。