Concrete temperature stress testing machine with ultrasonic and acoustic emission detection function

Abstract

The invention provides a concrete temperature stress testing machine with an ultrasonic and acoustic emission detection function. The machine comprises a temperature stress testing machine body 8, an ultrasonic testing system and a computation device. A bottom plate 9 of the temperature stress testing machine body 8 is provided with a plurality of installation holes and baffles matched with the installation holes and used for filling the installation holes. After concrete solidifies and the baffles are screwed off, a P wave probe in the ultrasonic testing system is installed in the installation hole 1, an S wave probe in the ultrasonic testing system is arranged in the installation hole 3, and the P wave probe 4 and the S wave probe 5 are installed on the portions corresponding to the upper surface of a concrete pouring area 10 above the P wave probe installation hole 1 and the S wave probe installation hole 3 respectively. The dynamic elasticity modulus of concrete is calculated by the computation device according to wave speed detected by the P wave probe 4 and the S wave probe 5. Elasticity modulus in the concrete temperature stress testing process can be accurately measured in real time in a lossless mode, and cracking specimens and breaking positions of concrete can be dynamically monitored.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a concrete temperature stress testing machine with ultrasonic and acoustic emission detection functions. Background technique [0002] Early temperature cracking of mass concrete is an important engineering problem. At present, the evaluation index of crack resistance is mainly evaluated by a single parameter, which cannot fully reflect the crack resistance of concrete. At present, the measurement of elastic modulus and crack detection technology still exist. Certain deficiencies. [0003] The elastic modulus is an important material parameter in the TSTM test. Whether the elastic modulus can be accurately measured has a decisive impact on the evaluation of creep and relaxation properties. At present, there are mainly active methods, passive methods and empirical formula fitting methods to measure the early elastic modulus of concrete using TSTM (Zhang Tao, Research on th...

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Problems solved by technology

[0005] The invention provides a concrete temperature stress testing machine with ultrasonic and acoustic emission detection functions, which is used to solve the technical problem that the current concrete temperature stress testing machine cannot measure the elastic modulus non-destructively and accurately during the experiment.

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