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在混凝土试件上钻出规定直径和深度的芯状直拔试件,用专用的设备将其拔出,得到拔断的应力值,通过该应力值与同条件试块抗压强度之间的对应关系,建立直拔法检测混凝土强度测强曲线。
On the concrete specimens drilled core diameter of the prescribed diameter and depth of the specimen, with a special equipment to pull it out to get pull off the stress value, through the stress value and the same conditions between the compressive strength of the test block Corresponding relationship between the establishment of direct-pull test concrete strength measured strength curve.