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本文介绍二种非破损性试验混凝土质量的方法,在引入统计数学方法基础上(也就是直接依照按极限状态理论方法)结合工程实例做了具体分析。一、用回弹仪鉴定混凝±的质量测定混凝土强度的非破损性试验方法最早是应用钢球撞击痕迹法,其原理和测金属硬度的布氏硬度计原理相似,即用一钢球打在二张中间夹有复写纸的纸层上,在一给定的冲击能量下根据球痕迹的大小来确定强度,实质上就是通过混凝土表面硬度来间接确定强度。如果混凝土的龄期较长,表
This article describes two methods of non-deterioration test concrete quality, based on the introduction of statistical mathematics methods (that is, directly in accordance with the limit state theory method) combined with engineering examples to do a specific analysis. First, the use of a rebound tester to determine the quality of coagulation ± non-deterioration of concrete strength test method is the earliest application of steel ball impact trace method, and the principle of measuring the hardness of the Brinell hardness tester is similar to the use of a steel ball In two sheets of paper sandwiched with carbon paper, the strength is determined according to the size of the ball trace at a given impact energy, and the strength is determined indirectly through the hardness of the concrete surface. If the concrete age is longer, the table