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Cement-based temperature sensing element for positive and negative temperature automatic measurement

A sensing element, cement-based technology, applied in the field of sensing elements, can solve problems such as data instability, and achieve the effects of repeated measurement data stability, good compatibility, and guaranteed accuracy

Inactive Publication Date: 2010-11-17
UNIV OF JINAN
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The temperature measurement range of the current temperature sensing element is still limited to above zero degrees. By measuring the resistance signal of the sensing element as the electrical signal for sensing the ambient temperature, the repeated measurement data is unstable.

Method used

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  • Cement-based temperature sensing element for positive and negative temperature automatic measurement
  • Cement-based temperature sensing element for positive and negative temperature automatic measurement
  • Cement-based temperature sensing element for positive and negative temperature automatic measurement

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Embodiment Construction

[0027] Table 1 Alite-barium calcium sulfoaluminate cement properties

[0028]

[0029] Table 2 Chopped Polypropylene Hydrocarbon Fiber Performance Parameters

[0030]

[0031] Table 3 Performance parameters of carbon nanotubes

[0032]

[0033] Table 4 Alite-barium calcium sulfoaluminate cement clinker each mineral phase system ratio (wt%)

[0034]

[0035] Prepare alite-barium calcium sulfoaluminate cement, chopped polypropylene hydrocarbon carbon fibers and carbon nanotubes with physical and chemical properties as described in Table 1, Table 2, Table 3 and Table 4. Chopped polypropylene carbon fiber is cleaned and dried, and a certain proportion of chopped polypropylene carbon fiber is added to the methyl cellulose solution, stirred with a glass rod to ensure that the chopped polypropylene carbon fiber is completely dispersed; at the same time, carbon nanotubes are added to ten Disperse in sodium dialkylbenzenesulfonate solution, then pour the above two solutio...

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Abstract

The invention discloses a cement-based temperature sensing element for positive and negative temperature automatic measurement. The cement-based temperature sensing element comprises a test block and a pair of electrodes, wherein, the electrodes are respectively positioned on the upper surface and the lower surface of the test block, and the test block comprises a cement matrix and conductive fiber which is evenly distributed in the cement matrix; the cement matrix comprises alite-barium calcium sulphoaluminate cement and sand; and the conductive fiber is composed of chopped polypropolefin carbon fiber and a carbon nanotube. The cement-based temperature sensing element of the invention has the beneficial effects: 1. the alite-barium calcium sulphoaluminate cement is taken as the cement matrix, and the carbon nanotube expands the temperature measurement range of the temperature sensing element below a freezing point; and 2. the capacitive signal of the sensing element is sensitive to temperature change, thus stable data can be acquired through multiple repeated measurement.

Description

technical field [0001] The invention relates to a sensing element in the field of detection technology, in particular to a cement-based temperature sensing element which can be used for positive and negative temperature self-test and can be integrated with the mass concrete for monitoring the temperature change inside the mass concrete . Background technique [0002] Temperature has a significant influence and effect on the stress of mass concrete structures. The study of structural temperature field and internal temperature gradient occupies an increasingly important position in modern engineering structure detection research. The measurement of mass concrete temperature field is of great significance no matter during construction or operation. During construction, almost all large-volume concrete structures must take measures to control temperature, reduce the temperature gradient in the structure, prevent cracks, and ensure the safety of the overall structure; during ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/34C04B28/36C04B14/38C04B16/06
Inventor 王守德芦令超黄世峰常钧叶正茂周宗辉程新
Owner UNIV OF JINAN
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