Detection device and detection method for rebound parameter of concrete

Abstract

The invention discloses a detection device and a detection method for a rebound parameter of concrete. The device comprises a plurality of concrete rebound hammers and a bracket, wherein the bracket comprises a plurality of assembly units; fixing frames are inserted by the assembly units; then, the concrete rebound hammers are fixedly connected and fixed by the fixing frames; the bracket is connected by extension links and universal joints at the bottom of the bracket; and the connected bracket is leveled by the extension links and the universal joints. The detection device performs detectionby arranging the concrete rebound hammers in a detection area in an equilateral triangle or regular hexagon shape; invalid test values are excluded by sequential detection and simultaneous detection;and the difference of individual measurement is reduced to the full extent. The device can continuously detect the rebound parameter of the concrete, is high in detection precision, high in stabilityand convenient to mount, dismount and adjust at the same time.

Description

Technical field [0001] The invention relates to the technical field of construction engineering testing, in particular to a concrete rebound parameter detection device and a detection method. Background technique [0002] In the field of construction engineering testing technology, the rebound method to detect the compressive strength of concrete is the most commonly used non-destructive testing method in the field inspection of concrete structures. It is mainly realized by the concrete rebound tester as a tool, and the concrete rebound tester is used for on-site inspection. The most extensive non-destructive testing instrument for concrete compressive strength. Its basic principle is to use a tension spring to drive a heavy hammer. The heavy hammer hits the bounce rod perpendicular to the concrete surface with a constant kinetic energy to deform the local concrete and absorb part of the energy. The other part of the energy is converted into the rebound kinetic energy of the heav...

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Problems solved by technology

[0003] In the standard of JGJ / T23-2011 "Technical Regulations for Testing the Compressive Strength of Concrete by Rebound Method", there are many requirements for the measurement area on the surface of the component to be tested. It requires that the measurement points should be evenly distributed in the measurement area. The net distance of the points should not be less than 20mm. When testing the compressive strength of concrete by the rebound method, usually use a ruler, marker pen or chalk to draw the grid lines of the testing area one by one on the components. When the amount of projectile survey area is large, the process of drawing grid lines in the survey area in the traditional way is cumbersome, and the work efficiency of arranging the survey area is low

When the inspector draws the survey area based on experience, the area of ​​the survey area is difficult to meet the specification requirements, which affects the accuracy of the test results

And in the whole process of operating the concrete hammer, you should pay attention to the posture of holding the concrete hammer, hold the middle part of the concrete hammer with one hand, and play the role of righting; hold the tail of the instrument with the other hand, and apply pressure to the instrument. At the same time, it also plays an auxiliary righting role, but it will inevitably make it difficult for the axis of the concrete rebound tester to be always perpendicular to the concrete test surface when operated by hand, which will lead to large human errors in the measurement results.

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