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Measuring device and measuring method for accurately measuring roughness of concrete test piece

A technology of concrete specimen and measuring device, which is applied in the direction of mechanical roughness/irregularity measurement, etc., to eliminate the factors that affect the result, and the leveling is simple and efficient, and the precision is high.

Pending Publication Date: 2022-07-12
HENAN INST OF ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In the operation of the prior art, standard sand is often added to the bonding surface of the concrete specimen, and a flat plate is used to scrape the bonding surface of the concrete specimen by hand, and then The standard sand retained on the bonding surface of the concrete specimen is introduced into the measuring cylinder to measure the volume, and the result obtained in this way is quite different from the actual one.

Method used

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  • Measuring device and measuring method for accurately measuring roughness of concrete test piece

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Embodiment 1

[0027] A measuring device for accurately measuring the roughness of concrete specimens, such as figure 1 As shown, it includes four telescopic rods with adjustable length, a funnel 3 fixed on the telescopic rod, a horizontal cage 4 fixed in the funnel, and a sand filling mechanism set on the funnel. The telescopic rod includes a lower rod 1 and The upper rod 2 is screwed with the lower rod, and the sand filling mechanism includes four sleeves 5 evenly distributed on the funnel, a compression spring (not shown in the figure) arranged in the sleeve, and an L-shaped plug inserted in the sleeve. The insertion rod, the frame 9 fixed on the free end of the L-shaped insertion rod, and the hard cover plate 12 covered on the frame. The top of the hard cover plate has a second level 13. In this embodiment, the frame is surrounded by cardboard. Rectangular frame, the top of the rectangular frame is flush with the test piece, and the hard cover is made of glass plate (not shown in the fig...

Embodiment 2

[0029] The method of accurately measuring the roughness of concrete specimens by the above-mentioned measuring device, such as figure 1 shown, including the following steps:

[0030] Step 1. Put the measuring device on the test bench, and adjust the level of the horizontal cage 4 by twisting the lower rod 1 of the telescopic rod;

[0031] Step 2. Put the test piece into the center of the horizontal cage and face the frame 9 in the vertical direction, press down the middle of the hard cover, so that the hard cover and the frame move down together until the The bottom surface of the cover plate touches the highest point of the specimen, and then the frame is positioned by the positioning screw;

[0032] Step 3. Remove the hard cover, add standard sand to the frame, scrape off the excess standard sand along the upper surface of the frame, and clean the horizontal cage;

[0033] Step 4. Put the measuring cylinder 11 under the funnel, raise the frame, collect the standard sand on...

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Abstract

The invention relates to a measuring device and a measuring method for accurately measuring the roughness of a concrete test piece, and the measuring device comprises at least three telescopic rods with adjustable length, a funnel fixedly arranged on the telescopic rods, a horizontal retainer fixedly arranged in the funnel, and a sand filling mechanism arranged on the funnel, the sand filling mechanism comprises four sleeves uniformly distributed on the funnel, pressure springs arranged in the sleeves, L-shaped insertion rods inserted in the sleeves, a frame fixed at the free ends of the L-shaped insertion rods and a hard cover plate covering the frame, and a positioning screw in positioning fit with the L-shaped insertion rods is screwed on each sleeve. The invention also comprises a method for accurately measuring the roughness of the concrete test piece. According to the measuring device for accurately measuring the roughness of the concrete test piece, due to the horizontal placement of the test piece and the scraping mode of redundant standard sand which is parallel and level to the highest point and is restrained by the frame, the measuring precision is greatly improved, and the problem that the deviation between the current measuring result and the actual value is large is well solved.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a measuring device and a measuring method for accurately measuring the roughness of a concrete specimen. Background technique [0002] In the research on the bonding performance of the new and old concrete interface, the roughness treatment of the existing old concrete repair surface is required to ensure the reliability of the bonding between the repair material and the existing old concrete. The roughness is usually expressed by the average depth of pouring sand, that is, pour the standard sand on the chiseled side of the concrete specimen to the highest point of the bonding surface of the concrete specimen (that is, the chiseled surface), and then measure the standard sand used. The average depth of sand filling can be obtained by dividing the volume of standard sand by the cross-sectional area of ​​the bonding surface. [0003] In the operation of the prior art, after adding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/28
CPCG01B5/28
Inventor 陈刚袁敏赵亮平申选召王航孙彦飞韩瑞芳赵红垒余兴华
Owner HENAN INST OF ENG