Method for rapidly detecting parameters of cement-based material

Abstract

The invention discloses a method for rapidly detecting parameters of a cement-based material, belonging to the field of civil engineering materials. The method disclosed by the invention is implemented by a bracket of a cement-based material test-piece to be tested, a controllable electromagnet, a small steel ball for shock excitation, an accelerometer for receiving vibration signals, a matched charge amplifier and a signal receiving and acquisition module which are reasonably arranged and matched with data analyzing and processing software. The method comprises the following steps that: the small steel ball freely falls onto the top of the cement-based material test-piece to excite structural vibration of the test-piece; then, the structural vibration is received and collected through the accelerometer and matched equipment and is transmitted to a computer; the computer software can rapidly give parameters, such as dynamic elastic modulus, shear modulus, poisson ratio, transverse wave velocity and longitudinal wave velocity, of the cement-based material to be tested according to a certain algorithm.

Description

technical field [0001] The invention relates to a method for rapidly detecting material parameters of cement-based materials, and the invention belongs to the field of civil materials. Background technique [0002] The material parameters of cement-based materials, such as elastic modulus, shear modulus, Poisson's ratio, shear wave and longitudinal wave velocity, are important indicators to measure the quality and characteristics of cement-based materials. [0003] At present, most of the methods for measuring the above parameters of cement-based materials are complicated in operation, require special equipment or devices, are costly, and are easily affected by manual operation and the environment. At the same time, those methods can only measure one or two material parameters at the same time, and the methods for measuring different parameters are quite different. The prior art fails to provide a fast and reliable device and method for simultaneously measuring the above-men...

AI Technical Summary

Problems solved by technology

This method can avoid errors caused by Young's modulus and material density, which is conducive to the improvement of accuracy, and the test structure is simple to make, and can quickly and accurately measure the Poisson's ratio of the material, but it cannot be quickly and accurately measured at the same time. Other material parameters of cement-based materials such as dynamic elastic modulus, shear modulus, shear wave and longitudinal wave velocity, etc.

[0007] At present, there is no clear test method for shear wave and longitudinal wave velocity of cement-based materials in the prior art, but this method can quickly and accurately measure various material parameters of cement-based materials, including shear wave and longitudinal wave velocity.

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