Carbomer gel medium for simulating rheological property of cement paste and preparation method thereof

A technology of carbomer gel and rheological properties, which is applied in the field of materials, can solve problems such as the difficulty of intuitively obtaining the motion parameters of medium components, the difficulty of rheological concrete physical model tests, and the difficulty of obtaining the motion laws of internal components. Small changes in variable parameters over time, obvious pseudoplastic characteristics, and good transparency

Inactive Publication Date: 2014-04-23
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The composition of concrete mixture is very complex, and its rheological mechanism is still unclear, and a relatively complete mechanical parameter system has not yet been formed. The reason is that it is difficult to accurately perform physical model tests on rheological concrete.
Since the interior of the cement paste cannot be visualized, it is difficult to obtain the movement law of the internal components
Traditional research methods are difficult to intuitively obtain the motion parameters of medium components and establish reliable physical models

Method used

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  • Carbomer gel medium for simulating rheological property of cement paste and preparation method thereof
  • Carbomer gel medium for simulating rheological property of cement paste and preparation method thereof
  • Carbomer gel medium for simulating rheological property of cement paste and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The carbomer gel medium for simulating the rheological properties of the cement paste with a water-cement ratio of 0.5 and cement as P.O42.5 is composed of the following components in weight percentage: deionized water 99.75%, carbomer resin powder 0.15% %, triethanolamine 0.1%.

[0015] Add carbomer resin powder to deionized water, add triethanolamine dropwise after it is completely dissolved, and get a transparent gel after stirring evenly.

[0016] 1. Fit test

[0017] Select the residual sum of squares test method, which can highlight the differences between parameter values ​​when the curve trends are similar, so as to improve the accuracy and find the curve with the highest degree of fitting. According to the principle of regression analysis, the correlation index R is used for the effect of curve regression 2 to measure. Correlation index R 2 The calculation formula is:

[0018]

[0019] In the formula: S R Represents the regression sum of squares; S T ...

Embodiment 2

[0042]The carbomer gel medium for simulating the rheological properties of the cement slurry with a water-cement ratio of 0.48 and cement of P.O42.5 is composed of the following components in weight percentage: deionized water 99.73%, carbomer resin powder 0.16 %, neutral regulator triethanolamine 0.11%.

[0043] Add the carbomer resin powder to deionized water, add triethanolamine dropwise after it is completely dissolved, and get a transparent gel after stirring evenly.

[0044] Comparing the two rheological parameters, the consistency system K and the rheological characteristic index n, the regression curve equation of the carbomer gel with a concentration of 0.16% and the water-cement ratio of 0.48, and the cement is P.O42.5 cement slurry fitting degree R 2 is 0.98.

[0045] Under the condition of significance level α=0.05, the carbomer gel consistency coefficient and the rheological property index of the cement paste simulation medium with a water-cement ratio of 0.48 ar...

Embodiment 3

[0047] The carbomer gel medium for simulating the rheological properties of the cement slurry with a water-cement ratio of 0.45 and cement of P.O42.5 is composed of the following components in weight percentage: 99.70% of ionized water, 0.18% of carbomer resin powder , neutral regulator triethanolamine 0.12%.

[0048] Add the carbomer resin powder to deionized water, add triethanolamine dropwise after it is completely dissolved, and get a transparent gel after stirring evenly.

[0049] Comparing the two rheological parameters, the consistency system K and the rheological property index n, the regression curve equation of the carbomer gel with a concentration of 0.18% and the water-cement ratio of 0.45, and the cement is P.O42.5 cement slurry fitting degree R 2 is 0.97.

[0050] Under the condition of significance level α=0.05, the carbomer gel consistency coefficient and the rheological property index of the cement slurry simulation medium with a water-cement ratio of 0.45 ha...

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Abstract

The invention provides a carbomer gel medium for simulating rheological property of cement paste and a preparation method thereof. The carbomer gel medium for simulating rheological property of cement paste comprises the following components by weight percent: 99.70-99.75 percent of deionized water, 0.15-0.18 percent of carbomer resin powder and 0.10-0.12 percent of triethanolamine (serving as a neutral regulator), wherein the water cement ratio in the carbomer gel medium for simulating rheological property of cement paste is 0.45-0.5. The preparation method comprises the following steps: adding the carbomer resin powder into the deionized water, dripping the triethanolamine after the powder is completely dissolved, uniformly stirring, standing for 5-10 minutes so as to obtain transparent carbomer gel. The 940 series of carbomer gel serves as a simulation medium of the cement paste, and the carbomer gel medium is low in cost, simple to prepare, high in transparency, low in thixotropy, small in time-dependent behavior of rheological parameters and obvious in pseudoplastic characteristics.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a carbomer gel medium for simulating the rheological properties of cement slurry and a preparation method thereof. Background technique [0002] The composition of concrete mixture is very complex, and its rheological mechanics mechanism is still unclear, and a relatively complete mechanical parameter system has not yet been formed. The reason is that it is difficult to accurately perform physical model tests on rheological concrete. Since the interior of the cement paste cannot be seen, it is difficult to obtain the movement rules of the internal components. Traditional research methods are difficult to intuitively obtain the motion parameters of media components and establish reliable physical models. Therefore, using visual transparent media instead of cement paste can make it easier to obtain the motion parameters of the paste components, especially the granula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N11/00
Inventor 田正宏李旭航王晓栋边策蔡博文
Owner HOHAI UNIV
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