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几十年来,国内外一直致力于混凝土质量非破损检验方法的研究,已取得了很大的进展;而钢筋的检验,至今仍不得不沿用传统的破损检验法,即凿开混凝土,截取钢筋试样,然后对试样进行力学试验。在实际工程中需要检测钢筋强度的情况是屡见不鲜的,特别是在老厂改造工程中,由于缺乏原始资料,要求对钢筋的类别、材质和强度作出正确鉴定的钢筋混凝土结构、构件更是量大面广。因此,钢筋强度特性的非破损检验技术愈来愈为人们所关注,已成为国内期待解决的一个重要的技术课题。
Over the past decades, domestic and foreign research has been devoted to the study of non-destructive inspection methods for concrete quality, and great progress has been made. However, the inspection of steel bars still has to follow the traditional method of damage inspection, ie, cutting open concrete and intercepting steel bars. Samples were then tested mechanically. In the actual project, it is not uncommon to check the strength of the steel bars. Especially in the old factory reconstruction projects, due to the lack of original data, the reinforced concrete structures and components that require the correct identification of the type, material, and strength of the steel bars are larger. Wide range. Therefore, the non-destructive inspection technology of the strength characteristics of steel bars has attracted more and more attention, and has become an important technical issue that is expected to be solved in China.