Device and method for detecting compressive strength of concrete through shearing-press method

Abstract

The invention relates to a device and method for detecting the compressive strength of concrete through the shearing-press method. The device comprises a U-shaped pedestal, a bearing plate which is connected with the middle of the U-shaped pedestal in a sliding manner, a screw rod which penetrates through one end of the U-shaped pedestal and is connected with the bearing plate and a crank connected with the end of the screw rod, wherein a pressurizing oil cylinder is connected with the other end of the U-shaped pedestal; the inside of the pressurizing oil cylinder is provided with a piston rod and a retracting spring; the front end of the piston rod of the pressurizing oil cylinder is connected with a pressure head, the pressure head is opposite to the bearing plate, the cross sectional area of the pressure head is less than the area of the bearing plate; concrete to be tested is fixed between the bearing plate and the pressure head; the choke of the pressurizing oil cylinder is connected with a hand pump, and the tail of the pressurizing oil cylinder is connected with the joint of a digital pressure gauge. The device of the invention has the advantages of simple operation and high test accuracy; the bearing capacity of the concrete member is not influenced after the test; and water and electricity are not used, and the device meets the detection demands of the construction site. The device of the invention can be widely used to test the compressive strength of the structural concrete in the construction site.

Description

technical field [0001] The invention relates to a detection instrument and method for construction engineering, in particular to a device and method for detecting the compressive strength of concrete by a shear compression method. Background technique [0002] At present, methods for testing the compressive strength of structural concrete in construction engineering include rebound method, ultrasonic rebound comprehensive method, core drilling method, and pull-out method, and their performances are shown in the table: [0003] Detection method advantage shortcoming rebound method The instrument is lightweight and easy to operate It is greatly affected by the surface condition of the concrete and the carbonation depth, which makes the test error too large; Ultrasonic Rebound Synthesis Non-destructive testing An ultrasonic instrument is required. Ultrasonic testing must have a counter-measurement surface and requires electricity. Drilling met...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for detecting the compressive strength of concrete by the shear compression method, to solve the technical problem that the traditional structural concrete compressive strength detection method has a large damage surface and affects the structural bearing capacity; and solve the traditional structure The detection method of concrete compressive strength has high requirements on the surrounding environment and the problem of large errors

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