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1 混凝土结构无损检测的目的及方法分类 混凝土是结构工程的最重要材料之一,它的质量直接关系到结构物的安全。结构混凝土质量的传统检测方法,是以按规定取样制作的立方体试件为基础的。实践表明,用试件试验所测得的混凝土性能指标,往往与结构物中实际混凝土的性能有一定差别。因此,直接在结构物中检测混凝土质量的现场检测技术,已成为混凝土工程质量管理的重要手段。我国“钢筋混凝土工程施工及验收规范”(GB J204—83)中明确规定,当试件试验结果不符合混凝土强度验收的评定标准所规定的要求时,“可以在结构物中钻取混凝土试样或采取非破损试验方法进行检查”。从而在我国技术法规中正式确立了现场检测技术的重要意义和合法地位。近年来,我国广大科技工作者对如何加强混凝土质量控制和检测进行了大量研究,已将我国工程质量检测和评价技术水平提高到一个新的高度。全国各地普遍建立了工程质量监督机构,使整个质量保证系统日臻完善。目前我国已制订了若干部级技术规程,如《回弹法评定混凝
A purpose of nondestructive testing of concrete structures and methods of classification Concrete is one of the most important structural materials, its quality is directly related to the safety of the structure. Traditional methods of testing the quality of structural concrete are based on cubic specimens that have been prepared for sampling. Practice shows that concrete specimens measured by test performance indicators, often with the structure of the actual performance of concrete have some differences. Therefore, the on-site testing technology of testing the quality of concrete directly in the structure has become an important means of quality management of concrete engineering. China’s “Code for Construction and Acceptance of Reinforced Concrete Engineering” (GB J204-83) clearly stipulates that when the specimen test results do not meet the assessment requirements of concrete strength acceptance criteria, “can be drilled in the structure of concrete specimens Or take a non-destructive test method for inspection. ” Thus in our country technical regulations formally established the importance of on-site detection technology and legal status. In recent years, China’s vast number of scientists and technicians on how to strengthen the quality control and testing of concrete carried out a large number of studies, our engineering quality inspection and evaluation technology to a new level. Project quality supervision agencies have been established throughout the country, improving the entire quality assurance system. At present, China has formulated a number of ministerial technical regulations, such as "resilience assessment of coagulation