A testing method for static elastic modulus of concrete prism test block based on shock echo

A technology of elastic modulus and shock echo, which is applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, analyze materials, instruments, etc., can solve problems such as calculation errors and inaccurate measurement of concrete elastic modulus, and reduce errors. Avoid static pressure test, low cost effect

Active Publication Date: 2020-10-16
SHANXI PROVINCIAL RES INST OF COMM
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  • Abstract
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Problems solved by technology

Therefore, the indirect method will lead to a series of calculation errors and cannot accurately measure the elastic modulus of concrete

Method used

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  • A testing method for static elastic modulus of concrete prism test block based on shock echo
  • A testing method for static elastic modulus of concrete prism test block based on shock echo
  • A testing method for static elastic modulus of concrete prism test block based on shock echo

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Embodiment

[0040]Taking the elastic modulus detection of the concrete standard prism test block (size 150mm * 150mm * 300mm) made by a certain laboratory as an example, a kind of concrete prism test block static elastic modulus detection method based on shock echo provided by the invention, The specific steps are:

[0041] 1. Use a grinder to polish the two end faces of the test block along the length direction to make a test piece;

[0042] 2. Using the concrete multifunctional detector and vaseline, the dynamic elastic modulus of the specimen is detected by the single-sided reflection method based on the shock echo method;

[0043] 3. According to the dynamic-static elastic modulus numerical relationship, use the measured dynamic elastic modulus of the test piece to deduce the static elastic modulus of the test piece, that is, the static elastic modulus of the concrete prism test block.

[0044] In this example, the concrete grade is C55, and a group (6) of prism test blocks after 28 ...

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Abstract

The invention discloses a concrete prism test block elasticity modulus detecting method based on impact echo. The method comprises the steps that a concrete prism test block is cut into a test piece with the slenderness ratio being larger than or equal to 2; two end faces of the cut test piece are polished to be smooth in the length direction; the dynamic modulus of elasticity of the test piece isdetected by utilizing the impact echo method; and the static modulus of elasticity of the test piece is deduced by utilizing the detected dynamic modulus of elasticity according to a dynamic-static elasticity modulus numerical relationship, and the static modulus of elasticity of the concrete prism test block is obtained. The method can rapidly and accurately detect the existing real-time staticmodulus of elasticity of the concrete prism test block, and avoids a large amount of redundant test block static pressure tests. The method is easy to operate and low in cost, can avoid to purchase test equipment such as large-size pressure testing machines, and can effectively lower the project cost. The used formula can reduce the errors caused by deduction through indirect data.

Description

technical field [0001] The invention belongs to the technical field of civil engineering detection, in particular to a method for detecting the static elastic modulus of a concrete prism test block based on shock echo. [0002] technical background [0003] The elastic modulus of concrete is one of the most important mechanical indicators of concrete materials. It can not only directly reflect the stiffness characteristics of concrete materials and the deformation characteristics of concrete structures, but also indirectly reflect the aging characteristics of concrete materials and the internal failure characteristics of concrete structures. Therefore, the real-time and accurate detection of concrete elastic modulus is of great significance. [0004] There are mainly two methods for measuring the static elastic modulus of concrete prism test blocks. One is the direct measurement method, that is, the elastic modulus is measured by the static pressure method in the current spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/07
CPCG01N29/07G01N2291/011G01N2291/0232G01N2291/02827
Inventor 郭学兵韩之江刘志华汪永强赵雷郭文龙王磊陈栋栋傅莉郭琪何国花寇伟刘建勋刘媛媛卢鹏吕立宁李卓然毛敏申雁鹏汪贤安王望春王潇楠王琪吴佳佳吴焱谢利安赵芳赵晓晋赵文溥郑彪
Owner SHANXI PROVINCIAL RES INST OF COMM
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