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Device and method for ultrasonically determining the dynamic elastic modulus of a material

A technology of dynamic elastic modulus and measuring device, used in equipment, shotcrete, measuring device, and determining the dynamic elastic modulus of materials, which can solve the problems of time-consuming, cumbersome, and unsuitable for on-site measurement.

Inactive Publication Date: 2008-04-16
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In materials with air bubbles, cracks and / or inclusions that respond ultrasonically differently than the matrix, the response of the material can become more complex
In particular, true fundamental material properties are often not available without special corrections
[0005] The main disadvantage of the known devices is that they can only be used in a narrow frequency range, while the dynamic elastic properties of the material strongly depend on the excitation frequency
In addition, the devices known in the art are bulky, have high energy consumption and are therefore not suitable for field measurements
Furthermore, existing devices do not provide direct display of material properties and rely on data processing after measurement, which is time consuming
Furthermore, existing devices have a high signal-to-noise ratio

Method used

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  • Device and method for ultrasonically determining the dynamic elastic modulus of a material
  • Device and method for ultrasonically determining the dynamic elastic modulus of a material
  • Device and method for ultrasonically determining the dynamic elastic modulus of a material

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Embodiment Construction

[0084] Referring now to the drawings, Figure 1a shows a card 7 connected to a multiplexing unit 22, a measurement device 10 and an analog-to-digital conversion module 8, the card comprising a computer bridge interface 1 for sending signals to a computer-readable medium 21, a low voltage frequency Tune electronic oscillator 2, signal generator 3, electronic switch 4, high voltage broadband amplifier 5, and optional electronic memory 9. Furthermore, FIG. 1 a shows a multiplexing unit 22 , a measuring device 10 , a voltage limiter 31 , a voltage divider 32 , an analog-to-digital conversion module 8 and a computer-readable medium 21 separate from the card 7 . The analog-to-digital conversion module 8 is a separate unit or part of a computer. Electronic storage 9 (shown in dashed lines) is either on the card 7 or within the computer. In case the analog-to-digital conversion module 8 is part of a computer, preferably the electronic memory 9 is also part of the computer.

[0085] A...

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Abstract

The invention relates to the determination of the dynamic elastic modulus of a material, such as a material comprising a mineral binder like cement, or gypsum, or the like, or a polymer, or ceramic, preferably mortar or concrete, in particular shotcrete, using sound, preferably ultrasound waves which penetrate the material and are continuously measured and analyzed. In particular, the invention relates to an apparatus, to a measuring device, and to a method for determining the dynamic elastic modulus of a material using the apparatus.

Description

technical field [0001] The present invention relates to the use of sound waves, preferably ultrasonic waves, which penetrate materials and are continuously measured and analyzed to determine the dynamic modulus of elasticity of materials such as mineral binders like cement or gypsum containing polymers, or ceramics, etc. , especially such as mortar, concrete, especially shotcrete. In particular, the invention relates to a device, a measuring device and a method of using the device to determine the dynamic modulus of elasticity of a material. Background technique [0002] Classical tools for measuring material properties of materials comprising mineral binders and polymers are eg the Vicat test, penetrometer, rheometer, needle puncture or compression testing equipment from Instron(R). But these tools cannot be used to monitor the complete time evolution of selected material properties. [0003] Ultrasonic analysis methods for measuring material properties of mineral binders...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/07G01N29/11G01N33/38G01N3/32G01N29/34G01N29/38G01N29/032G01N29/036G01S7/523H03K3/02H03B5/00
CPCG01N29/036G01N29/032G01N2291/105G01N33/383G01N2291/0235G01N29/075G01N2203/0075G01N2203/0008G01N29/343G01N2203/0055G01N2203/0019G01N29/345G01N2291/02827G01N2203/0284G01N2203/0025G01N2291/011G01N2291/0422G01N2291/0251G01N29/11G01N29/38
Inventor 迪迪尔·路藤斯朱利恩·洛佩兹-瑞欧思罗伯特·法拉特诺曼·布兰科
Owner SIKA TECH AG
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