A non-destructive testing method for concrete strength based on elastic waves

Abstract

The invention discloses a method for non-destructive testing of concrete strength based on elastic waves, which comprises the following steps in sequence: S1, obtaining the elastic modulus of the concrete component to be tested through elastic waves; S2, introducing the elastic modulus obtained in step S1 into In the known relationship between elastic modulus and compressive strength, obtain the corresponding compressive strength of the elastic modulus obtained in step S1; the known relationship between elastic modulus and compressive strength is: known and measured concrete Modulus of elasticity versus compressive strength for concrete members of the same type. The method can quickly obtain the concrete strength inside 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.