Transparent mortar mixture simulating rheological property of cement mortar and preparation method of transparent mortar mixture

A rheological property, cement mortar technology, applied in the field of materials, can solve the problems of difficult to intuitively obtain the motion parameters of media components, difficult to test physical models of rheological concrete, and difficult to obtain the motion laws of internal components, etc. Small time change, obvious pseudoplastic characteristics, good transparency

Inactive Publication Date: 2014-04-16
HOHAI UNIV
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  • Abstract
  • Description
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  • Application Information

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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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  • Transparent mortar mixture simulating rheological property of cement mortar and preparation method of transparent mortar mixture
  • Transparent mortar mixture simulating rheological property of cement mortar and preparation method of transparent mortar mixture
  • Transparent mortar mixture simulating rheological property of cement mortar and preparation method of transparent mortar mixture

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The simulated water-cement ratio is 0.5, the sand-cement ratio is 1:1, and the cement is a carbomer gel medium with rheological properties of P.O42.5 cement mortar. It is composed of the following components in weight percentage: deionized water 94.5%, Carbomer resin powder 0.3%, neutral regulator triethanolamine 0.2%, transparent glass beads 5%.

[0016] Add carbomer resin powder to deionized water, add triethanolamine dropwise after it is completely dissolved, stir evenly and let it stand for 5-10 minutes to obtain transparent carbomer gel, then add transparent glass beads and stir evenly. .

[0017] 1. Fit test

[0018] 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...

Embodiment 2

[0043] The simulated water-cement ratio is 0.48, the sand-cement ratio is 1:1, and the cement is a transparent mortar mixture with rheological properties of P.O42.5 cement mortar. It is composed of the following components in weight percentage: deionized water 93.46%, Carbomer resin powder 0.32%, neutral regulator triethanolamine 0.22%, transparent glass beads 6%.

[0044] Comparing the yield stress τ of the two rheological parameters 0 and plastic viscosity μ, the regression curve equation of the transparent mortar mixture obtained by mixing the concentration of 0.32% carbomer gel and 6% transparent glass microspheres and the water-cement ratio is 0.48, the sand-cement ratio is 1:1, and the cement is P .O42.5 Fitting degree of cement mortar R 2 is 0.98.

[0045] Under the condition of significance level α=0.05, the yield stress τ of the transparent mortar mixture as the simulated medium of cement mortar with a water-cement ratio of 0.48 0 and plastic viscosity μ have obtai...

Embodiment 3

[0047] The simulated water-cement ratio is 0.45, the sand-cement ratio is 1:1, and the cement is a transparent mortar mixture with rheological properties of P.O42.5 cement mortar. It is composed of the following components in weight percentage: deionized water 92.41%, Carbomer resin powder 0.35%, neutral regulator triethanolamine 0.24%, transparent glass beads 7%.

[0048] Comparing the yield stress τ of the two rheological parameters 0 and plastic viscosity μ, the regression curve equation of the transparent mortar mixture obtained by mixing the concentration of 0.35% carbomer gel and 7% transparent glass microspheres and the water-cement ratio is 0.45, the sand-cement ratio is 1:1, and the cement is P .O42.5 Fitting degree of cement mortar R 2 is 0.99.

[0049] Under the condition of significance level α=0.05, the yield stress τ of the transparent mortar mixture as the simulated medium of cement mortar with a water-cement ratio of 0.45 0 and plastic viscosity μ have obtai...

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Abstract

The invention provides a transparent mortar mixture simulating a rheological property of cement mortar and a preparation method of the transparent mortar mixture. The mixture comprises the following components by weight percentage: 92.41-94.50% of deionized water, 0.30-0.35% of carbomer 940 powder, 0.20-0.24% of neutral regulator triethanolamine and 5-7% of transparent glass bead. The transparent mortar mixture simulates the rheological property of the cement mortar at a water cement ratio of 0.45-0.5 and a sand cement ratio of 1:1. The preparation method of the mixture comprises the steps of adding the carbomer powder into the deionized water, after complete dissolution, dropwise adding triethanolamine, after uniformly stirring, standing for 5-10min, obtaining transparent carbomer gel, and then uniformly stirring after adding the transparent glass bead. The transparent mortar mixture serves as a simulating medium of the cement mortar, is low in cost, simple to prepare, good in transparency, small in thixotropy and small in rheological parameter ongoing change, and has an obvious pseudoplastic characteristic.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a transparent mortar mixture for simulating rheological properties of cement mortar 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 gran...

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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