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我国有不少铁路和公路桥梁以及市政道路,由于使用多年需要抢修加固,而且要求加固和抢修工作在不影响正常运营情况下进行,这对抢修加固的方法以及材料的性能提出了很高的要求。如市政路面和桥面的抢修,要求混凝土强度发展快,操作方便,又要尽可能地不影响交通;又如铁路和公路桥梁的抢修加固,一般场地窄小,甚至高空作业,就要求施工简便、安全,抢修加固均要求新旧混凝土的粘结力强,强度发展快,收缩量小,抗裂性强,耐久性好,针对这些特点,我们对抢修加固用新材料和相关技术进行了研究。
In China, there are many railways, highways, bridges, and municipal roads, which require repairs and reinforcements for many years, and require reinforcement and repair work to be carried out without affecting normal operations. This places high demands on the methods of repair and reinforcement and the performance of materials. . Such as the repair of municipal roads and decks, requires that the strength of concrete be developed quickly, and the operation is convenient. It should also not affect traffic as much as possible. Also, if the repair of railways and highway bridges is carried out, the general site is narrow and even high-altitude operations require simple construction. Safety, repair, and reinforcement all require new and old concrete to have strong adhesion, rapid strength development, small shrinkage, strong crack resistance, and good durability. For these features, we researched new materials for repair and reinforcement and related technologies.