Apparatus for automatically and continuously recording early volume change of concrete, and measuring method thereof

A volume change, concrete technology, applied in the direction of volume measurement instrument/method, liquid/fluid solid measurement, measuring device, etc., can solve the problems of accurate evaluation of early autogenous shrinkage of difficult concrete, large error of measurement results, time-consuming and other problems, and achieve saving The effect of manpower, accurate measurement data and easy operation

Inactive Publication Date: 2008-12-10
CHINA FIRST HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the manual observation of the early volume change of concrete in the liquid level change method has large measurement error and time-consuming, especially nighttime observation is more difficult, and

Method used

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  • Apparatus for automatically and continuously recording early volume change of concrete, and measuring method thereof

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specific Embodiment approach 1

[0012] Specific implementation mode one: combine figure 1 Describe this embodiment, the device for automatically and continuously recording early volume changes of concrete described in this embodiment includes an airtight container 1, a thin tube 2, a glass rod 3, two resistance wires 4, a reading instrument 5 and a conductive liquid 6, the airtight container 1 is filled with a conductive liquid 6, the lower end of the thin tube 2 is inserted vertically below the liquid level of the conductive liquid 6 in the closed container 1, and the two resistance wires 4 are respectively attached symmetrically along the length direction of the glass rod 3 On the outer surface of the glass rod 3 , the glass rod 3 and two resistance wires 4 are inserted into the thin tube 2 , and the upper ends of the two resistance wires 4 are respectively connected with two terminals of the reading instrument 5 . The reading instrument 5 described in this embodiment is the prior art, and the two resistan...

specific Embodiment approach 2

[0014] Specific implementation mode two: combination figure 1 The present embodiment is described, and the capillary 2 in this embodiment is a glass capillary. The glass thin tube is convenient to observe the change of the conductive liquid 6, and then the conductive liquid 6 can be replenished in the glass thin tube 2 in time, so that the measurement results are continuous and accurate. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0015] Specific implementation mode three: combination figure 1 This embodiment is described. The airtight container 1 in this embodiment is composed of a container body 1-1 and a cover 1-2, and the cover 1-2 is airtightly connected with the upper end of the container body 1-1. Such design is convenient for operation and simple in structure. Other components and connections are the same as those in the first embodiment.

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Abstract

A device and a measuring method which can automatically and continuously record the early volume change of concrete relate to a device and a measuring method for measuring the volume change of the concrete. The invention solves the problems of the large result error and being incapable of continuing day and night in the manual observation in the method by adopting the liquid height change to measure the early volume change of the concrete. The lower end of a thin tube (2) is vertically inserted into a closed container (1); the lower end surface of the thin tube (2) is arranged below the liquid level of a conductive liquid (6); two resistance wires (4) are respectively and symmetrically stuck on the outer surface of a glass stick (3) along the length direction of the glass stick (3); the upper ends of the resistance wires (4) are respectively connected with the two post heads of a reading instrument (5). The method includes: sealing and packaging a sample, arranging the sample into the closed container, injecting the conductive liquid into the closed container and reading a numerical value. The method of the invention is simple; the measured data is accurate; the method can provide more accurate data for the early volume change of the concrete.

Description

technical field [0001] The invention relates to a device and a measuring method for measuring the volume change of concrete. Background technique [0002] As my country's civil engineering enters a period of large-scale construction, the phenomenon of cracking occurs frequently due to the early shrinkage of concrete. The early spontaneous shrinkage of high-strength concrete with a low water-binder ratio is one of the important reasons for concrete cracking. However, the existing method for measuring the early volume change of concrete usually adopts the buoyancy method, the non-contact measurement method, and the liquid level height change method. The liquid level change method is to manually observe the early volume change of concrete in the container. This method is labor-intensive, and the error of manual observation is large, especially at night. Observation is more difficult, so it is difficult to accurately evaluate the early spontaneous shrinkage of concrete. Conten...

Claims

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Application Information

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IPC IPC(8): G01F22/00G01N33/38
Inventor 曾京生郑俊钱绍锦赵亚丁杨英姿高小建邓宏卫吴文迪廖群峰
Owner CHINA FIRST HIGHWAY ENG
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