剪切拉拔综合法检测混凝土抗压强度技术的研究

Study for“The Technique of Testing the Compressive Strength of Concrete by Cutting,Drawing and Pulling”

剪切拉拔综合法是在混凝土结构上,钻制直径为44 mm,深度为65 mm的园试件,无需取出,先用原位剪切仪将试件在深度25 mm处将试件剪断,再用拉脱仪将余下部分的40 mm试件从混凝土结构上拉出,也可在被测混凝土的结构面上钻制两个直径与深度都为44 mm芯样试件。分别采集原位单剪强度和拉脱强度,将两试件的测试强度作为变量,充分利用胶凝材料的抗拉性能和粗细骨料的剪切性能,采用剪切拉拔综合法测强曲线换算混凝土抗压强度。

Cut chela synthesis is pull on the concrete structure,drilling system 44mm in diameter,depth of 65mm specimen garden,do not need to take out,with in situ shear apparatus will first specimen in the depth of 25mm will specimen cut,reoccupy pulled off instrument to the rest of the 40mm specimen pulled out from the concrete structure,can also be used in surface of concrete structure system of drill two core samples from 44mm diameter and depth of specimen.In situ single shear strength and tensile strength were respectively collected,and the test strength of the two specimens was taken as the variable to make full use of the tensile property of cementing material and the shear property of coarse and fine aggregate.