Concrete strength nondestructive test method based on elastic wave

Abstract

The invention discloses a concrete strength nondestructive test method based on an elastic wave. The method successively comprises the following steps of S1, obtaining the elastic modulus of a concrete member to be tested by the elastic wave; S2, introducing the elastic modulus obtained in the step S1 into a relationship between the known elastic modulus and the compressive strength to obtain thecompressive strength corresponding to the elastic modulus obtained in the step S1, wherein the relationship between the known elastic modulus and the compressive strength is a relationship between theknown elastic modulus of a concrete member having the same type as the tested concrete member and the compressive strength. The method can quickly obtain the concrete strength in the concrete structure.

Description

technical field [0001] The invention relates to the field of concrete material safety detection, in particular to a method for non-destructive detection of concrete strength based on elastic waves. Background technique [0002] Concrete is the most commonly used material for important structural engineering in civil engineering, construction, bridge and tunnel, water conservancy, metallurgy and other industries, and plays a pivotal role in the construction of social infrastructure. However, during the use of concrete, various aging and deterioration phenomena will inevitably occur. If the construction quality is not well guaranteed, the aging and deterioration of the structure will be accelerated, the cost of maintenance and reinforcement will be greatly increased, and the service life of the structure will be seriously reduced. , resulting in social and economic losses. [0003] Concrete compressive strength and elastic modulus are important parameters reflecting concrete ...

AI Technical Summary

Problems solved by technology

The compressive test is a destructive test, and can only be cored by concurrent curing test blocks or structures, and cannot be directly carried out on the entity

Rebound method and ultrasonic rebound comprehensive method are widely used non-destructive testing methods, but both methods cannot test the elastic modulus of concrete, and are greatly affected by the surface state of structural concrete.

In addition, the rebound method cannot test the internal strength, the accuracy is poor, and carbonization depth correction is required; the ultrasonic rebound comprehensive method is highly dependent on the ultrasonic wave velocity calibration curve, the calibration is complicated, and is affected by the characteristics of the instrument itself, and it cannot be used in tunnel linings, etc. In the structure of the test method, the test accuracy of the ultrasonic wave velocity is significantly reduced. At the same time, the ultrasonic method is greatly affected by the steel bar and requires coupling agent coupling, which greatly reduces the test efficiency and cannot be used for large-scale testing in tunnels.

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