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A Method for Testing the Strength of Concrete Joint Surface by Acoustic Wave

A technology for concrete bonding and sound wave detection, which is applied in the field of sound wave detection of the strength of the concrete joint surface, can solve the problems such as the inability to detect the strength of the concrete joint surface, and achieve the effects of intuitive and accurate judgment results, simple operation and wide detection range.

Active Publication Date: 2022-05-24
XIANGTAN UNIV
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Problems solved by technology

Using this method cannot detect the strength of the concrete joint surface in actual engineering

Method used

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  • A Method for Testing the Strength of Concrete Joint Surface by Acoustic Wave
  • A Method for Testing the Strength of Concrete Joint Surface by Acoustic Wave
  • A Method for Testing the Strength of Concrete Joint Surface by Acoustic Wave

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Embodiment Construction

[0045] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

[0046] Example Experimental Model Test

[0047] (1) The strength grades and material mix ratios of the new and old concrete poured in this experiment are shown in Table 1:

[0048] Table 1

[0049] category power level water (kg) Cement (kg) Sand (kg) Stone(kg) new concrete C30 185 411 559 1245 old concrete C40 185 420 572 1273

[0050] (2) The production process of the concrete joint surface model specimen is divided into three steps: making the old concrete specimen; processing the roughness of the bonding interface; pouring new concrete. The geometric dimensions of the old concrete specimen and the new concrete specimen are...

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Abstract

The invention discloses a method for detecting the strength of a concrete joint surface with acoustic waves. The method performs acoustic wave detection on the bonding interface measurement area of ​​the concrete joint surface and the new and old concrete measurement areas on both sides of the joint surface. From the time domain diagram of the acoustic wave signal Extract the first wave sound time of each measuring point to calculate the representative value of concrete sound velocity in the measuring area, substitute the representative value of sound velocity in the measuring area into the strength conversion formula to calculate the strength value of the measuring area, and then compare the strength value of the bonding interface measuring area with the new and old concrete on both sides of the interface The strength value of the concrete measurement area is compared to judge the strength of the concrete joint surface. The method of the invention is suitable for detection on actual construction sites, and has the advantages of easy excitation, simple operation, no damage to structures during the detection process, wide detection range, etc., and has obvious advantages.

Description

technical field [0001] The invention provides a detection method, which relates to the technical field of engineering structure strength detection, in particular to a detection method for the strength of a concrete joint surface. Background technique [0002] As a structural form that conforms to the industrialized production method, prefabricated concrete structure has the advantages of fast construction speed, low labor intensity, less noise pollution and wet work, and easy control of product quality. It has become the mainstream direction of the development of the construction industry at home and abroad. However, since a large number of prefabricated components are used in prefabricated concrete buildings, when the prefabricated components are post-cast concrete, due to the large pouring area, dense reinforcement and many pre-embedded pipe lines, if the vibration is not compact during pouring, or the joint surface does not meet the requirements of the specification. It i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/07
CPCG01N29/07G01N2291/0232
Inventor 龙士国刘建镇张高峰李倩如
Owner XIANGTAN UNIV
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