Concrete strength monitoring device and monitoring method

Abstract

The invention discloses a concrete strength monitoring device and a monitoring method. According to the device and the method, the initial wave velocity of concrete which is not subjected to erosion and the concrete wave velocity within different depth ranges under different erosion ages are monitored by embedding a piezoelectric smart aggregate in eroded concrete, damage processes such as chiseling concrete samples and the like are not needed to be carried out, and the strength of the piezoelectric smart aggregate itself is sufficiently compatible with concrete, thus the influence on the structural performance of the concrete is avoided, and therefore the nondestructive monitoring of the strength of the eroded concrete can be realized. Based on the concrete strength monitoring device, themonitoring method provided by the invention can monitor the concrete wave velocity in real time non-destructively; by monitoring the wave velocity at different depths of the eroded concrete and constructing a relationship between the wave velocity, dynamic elastic modulus and strength, the compressive strength condition of an eroded concrete structure in accordance with the engineering practice can be directly obtained, and then the concrete structure is subjected to health monitoring and safety assessment by taking the concrete strength as a primary indicator.

Description

technical field [0001] The invention relates to the technical field of health monitoring of concrete structures under sulfate corrosion environment, in particular to a concrete strength monitoring device and a monitoring method. Background technique [0002] At present, the degree of deterioration of sulfate-eroded concrete is generally determined by macroscopic test indicators such as expansion rate, mass loss rate, dynamic elastic modulus, compressive strength, tensile strength, and flexural strength. Although the above indicators obtained from standard tests can be used for Comparing the size of the sulfate attack resistance of different concretes, but it cannot be applied to the safety assessment of sulfate attack concrete in the actual engineering environment. Because the determination of concrete expansion rate, mass loss, dynamic elastic modulus, compressive strength, flexural strength and tensile strength is carried out for specific concrete samples in a laboratory e...

AI Technical Summary

Problems solved by technology

However, in the actual engineering application environment, there is no current specification to clarify how to measure specific engineering structures, such as the expansion rate, dynamic elastic modulus, and mass loss of concrete bridge piers that suffer from sulfate erosion in coastal environments. There is no existing technical means to obtain the above-mentioned parameter indicators in line with engineering reality

In addition, if the strength of concrete in the actual environment needs to be sampled and measured, it will cause irreparable damage to the actual engineering structure and cause harm to the engineering structure.

In addition, sulfate-eroded concrete has an uneven nature. From the outside to the inside, the erosion damage gradually weakens. This feature also increases the difficulty of sampling and safety assessment.

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