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围绕已有建筑物或构筑物的混凝土质量可靠性进行鉴定和给以定量的评价,这是非破损试验方法所要解决的问题。经常使用的混凝土非破损试验方法的种类很多,如落锤法、回弹法、共振法、声速法等都不具备很高的测定精度,因而迫切要求对提高混凝土强度测定精度的各种因素进行分析,发展简便而实用的测试方法,这是目前急待研究解决的问题。综合法和拉拔法是颇有发展前途的测试方法,可以作为一种较好的手段来评定实际混凝土的匀质性和比较各建筑物之间和各构件之间的混凝土质量。综合法在国内有的部门已建立地区性测强曲线,使用效果很好。对现有的研究成果还需进一步整理总结,进行更多的衬充,定量地掌握各种因素对混凝土强度的影响,提出完整的实验结果,使之标准化,并形成制度,对正确判断实际混凝土的强度将是十分必要的。当前,非破损测试技术的检测范围越来越广,已由单纯的工程检验向生产中的质量控制方向发展;测试技术已由某一物理参数向综合多参数的测试方向发展;检测的物理基础已由单一的力学范围向声学、光学、电磁学、核物理学范围发展,各种专用及配套仪器也日益完备,已成为现有的破损检验方法相互补充的检测手段,从而可以更好地提高测定混凝土强度的精度。
The quality reliability of the concrete surrounding an existing building or structure is identified and quantitatively evaluated. This is a problem to be solved by the non-destructive test method. There are many types of concrete non-destructive test methods that are frequently used, such as drop hammer method, rebound method, resonance method, and sonic velocity method, which do not have high measurement accuracy. Therefore, various factors that increase the accuracy of concrete strength measurement are urgently required. Analysis, development of a simple and practical test method, which is currently pending research and solve the problem. The synthesis method and drawing method are quite promising testing methods and can be used as a better means to assess the homogeneity of the actual concrete and to compare the quality of concrete between buildings and between various components. Some departments in the comprehensive law in China have established regional intensity curves and they are very effective. The existing research results need to be further summarized and summarized, more lining is performed, quantitatively grasp the influence of various factors on the strength of concrete, put forward complete experimental results, make it standardized, and form a system to correctly judge the actual concrete The intensity will be very necessary. At present, the detection range of non-destructive testing technology is becoming wider and wider. It has evolved from simple engineering inspection to quality control in production; testing technology has evolved from a physical parameter to the direction of comprehensive multi-parameter testing; the physical basis of detection It has evolved from a single dynamic range to acoustics, optics, electromagnetics, and nuclear physics. Various special-purpose and supporting instruments have also become increasingly complete. It has become a complementary test method for the existing damage detection methods, and can be better improved. Determine the accuracy of concrete strength.