Device and method for measuring free variation of volume of cement paste under programmable temperature control

A technology of cement slurry and monitoring device, which is applied in the direction of volume measuring instrument/method, measuring device, temperature control, etc., can solve the problem that it cannot be used to measure the free change value of cement slurry volume, and its accuracy and reliability need further research. The problem of insignificant change in cement volume can achieve the effects of accurate and reliable measurement results, convenient device operation and simple method.

Pending Publication Date: 2018-07-06
武汉优城科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of method converts volume change into length, height or height change. There are too many conversion procedures and variables, and the volume change of cement is generally not significant, so its length, width and height changes are very small, so this measurement is used The accuracy and reliability of the test results calculated by length, width or height need to be further studied, and this method cannot be used to measure the free change value of cement slurry volume
Due to the impact of the early shrinkage of the slurry or the stability and complexity of the expansion properties of the slurry after adding an expansion agent, there is currently no recognized effective method for detecting the early volume change of the slurry.

Method used

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  • Device and method for measuring free variation of volume of cement paste under programmable temperature control
  • Device and method for measuring free variation of volume of cement paste under programmable temperature control
  • Device and method for measuring free variation of volume of cement paste under programmable temperature control

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a device for measuring the free change of cement paste volume under program temperature control, including a material filling module, a data acquisition module and an information processing module; the temperature control program is a constant temperature condition: the material filling module includes a constant temperature water bath box 1 and The sealed glass cup 3 of sample A to be tested and the sealed glass cup 4 of sample B to be tested placed therein, the cups of the sealed glass cup 3 of sample A to be tested and the sealed glass cup 4 of sample B to be tested are all filled Hydrophobic oil 14; the data acquisition module includes a temperature monitoring thermocouple 7, a capillary glass liquid level gauge 15 and Liquid level photoelectric direct reader 8, and temperature monitor 9 and liquid level monitor 10 of signal monitoring conversion; Described information processing module comprises information processor 11; Described tempera...

Embodiment 2

[0028] Such as figure 2 As shown, a device for measuring the free change of the volume of cement slurry under program temperature control, including a material filling module, a data acquisition module and an information processing module; the temperature control program is adiabatic condition: the material filling module includes a thermal insulation box 2 And the thermal insulation cup 5 of the sample to be tested and the thermal insulation cup 6 of the control group placed therein, the cups of the thermal insulation cup 5 of the sample to be tested and the thermal insulation cup 6 of the control group are all filled with hydrophobic oil 14. The data acquisition module includes a temperature monitoring thermocouple 7, a capillary glass tube liquid level gauge 15, and a liquid level photoelectric direct reader placed on the heat-insulated thermos cup 5 of the sample to be tested and the heat-insulated thermos cup 6 of the control group 8. The cold end compensation heat sourc...

Embodiment 3

[0031] Such as image 3 As shown, the device of Example 3 and the temperature control degree of Example 2 are all conditions of adiabatic temperature rise, and the difference from Example 2 is mainly that the liquid level monitor 10 is an eight-channel monitor, which is used to connect eight liquid level monitors simultaneously. The photoelectric direct reader 8 carries out measurement records; the temperature monitor 9 is an eight-channel monitor for simultaneously connecting eight temperature monitoring thermocouples 7 for temperature measurement and recording; the power compensation controller 13 is a four-channel controller , for simultaneously connecting four cold-end compensation heat sources 12 to independently heat the hydrophobic oil 14 in the heat-insulated thermos cups 6 of the four control groups.

[0032] The device of this embodiment is equipped with eight-channel temperature and liquid level monitors, which can simultaneously and accurately measure the hydration...

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Abstract

The invention belongs to the technical field of detection equipment of inorganic materials, and discloses a device and a method for measuring free variation of the volume of cement paste under programmable temperature control. The device can transmit the free variable volume of the cement paste under the constant temperature condition and the thermal insulation condition into a transparent capillary tube liquid level meter, the liquid level variation of the transparent capillary tube liquid level meter can be directly read and the liquid level value can be sent to a liquid level monitor by using a liquid level photoelectric direct reading meter, the liquid level monitor sends a signal to an information processor, the signal processor directly converts the liquid level value to be a volumevariable value, and corrects the volume variation at the temperature, and the volume variation value of the to-be-measured cement paste is directly calculated. The device and the method have the advantages of being convenient to operate, high in measurement accuracy, accurate in result and good in repeatability.

Description

technical field [0001] The invention belongs to the technical field of inorganic material detection equipment, and in particular relates to a device and method for measuring the free change in volume of cement paste under programmed temperature control. Background technique [0002] Cement is the most widely used building material, and the volume change caused by its own early hydration reaction properties has brought serious harm to the practical application of cement mortar and concrete. In the application of the concrete mixing industry, the water-binder ratio of the concrete mix ratio has dropped significantly, and some projects have abused the concrete expansion agent, resulting in an increase in the volume instability of the concrete in the plastic and hardening stages, and the resulting structural cracking problem has become more and more serious. [0003] The existing method for detecting volume change is usually to convert the measured volume change into the measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20G01N25/00G01F22/00G05D23/22
CPCG01F22/00G01N25/00G01N25/20G05D23/22
Inventor 董耀武代柱端陈健周晓阳
Owner 武汉优城科技有限公司
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