Cement paste for prestress engineering and manufacturing method thereof

A technology of cement paste and manufacturing method, which is applied in the field of grouting materials for prestressed system of civil construction engineering, the manufacture of cement paste for prestressed engineering, and the field of cement paste for prestressed engineering, which can solve the problem of adding secondary grouting links and cumbersome processes , It is not conducive to the quality control of prestressed engineering construction, etc., to achieve the effect of improving work efficiency, low bleeding rate, and improving compactness

Active Publication Date: 2012-05-02
CHINA NUCLEAR IND HUAXING CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This construction method is cumbersome, and the added secondary grouting link is not conducive to the quality control of prestressed engineering construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Prepare raw materials according to the following components and weight content: Portland cement: 300 parts; naphthalene-based water reducer: 4 parts; calcium lignosulfonate retarder: 1 part; water: 88 parts; Variable agent: 2 parts;

[0021] (2) First pour water into the slurry mixing tank, then pour the naphthalene-based water reducer into the slurry mixing tank and mix well;

[0022] (3) Add Portland cement while stirring, and the cement will be cut within 2 minutes. After the cement is cut, continue to stir, and the cement slurry will be obtained by stirring for 4 minutes including the cement cutting time;

[0023] (4) Transfer the cement slurry into a slurry storage tank with four agitators and let it stand for 45 minutes, then add calcium lignosulfonate retarder, start the agitator to stir for 4 minutes to obtain a retarded slurry, At 25°C, the fluidity of the retarded slurry was tested for 11.4 seconds;

[0024] (5) Continue to stand the retarded slurry in t...

Embodiment 2

[0029] (1) Prepare raw materials according to the following components and weight content: Portland cement: 300 parts; naphthalene-based water reducer: 6 parts; calcium lignosulfonate retarder: 1.5 parts; water: 94 parts; Variable agent: 4 parts;

[0030] (2) First pour water into the slurry mixing tank, then pour the naphthalene-based water reducer into the slurry mixing tank and mix well;

[0031] (3) Add Portland cement while stirring, and the cement will be cut within 2 minutes. After the cement is cut, continue to stir, and the cement slurry will be obtained by stirring for 5 minutes including the cement cutting time;

[0032] (4) Transfer the cement slurry into a slurry storage tank with four agitators and let it stand for 45 minutes, then add calcium lignosulfonate retarder, start the agitator to stir for 5 minutes to obtain a retarded slurry, At 25°C, the fluidity of the retarded slurry was tested for 10.6 seconds;

[0033] (5) Continue to stand the retarded slurry i...

Embodiment 3

[0038] (1) Prepare raw materials according to the following components and weight content: Portland cement: 300 parts; naphthalene-based water reducer: 8 parts; calcium lignosulfonate retarder: 2 parts; water: 100 parts; Variable agent: 7 parts;

[0039] (2) First pour water into the slurry mixing tank, then pour the naphthalene-based water reducer into the slurry mixing tank and mix well;

[0040] (3) Add Portland cement while stirring, and the cement will be cut within 2 minutes. After the cement is cut, continue to stir, and the cement slurry will be obtained by stirring for a total of 6 minutes including the cement cutting time;

[0041] (4) Transfer the cement slurry into a slurry storage tank with four agitators and let it stand for 45 minutes, then add calcium lignosulfonate retarder, start the agitator to stir for 6 minutes to obtain a retarded slurry, At 25°C, the fluidity of the retarded slurry was tested for 10.6 seconds;

[0042] (5) Continue to stand the retarded ...

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Abstract

The invention which provides a cement paste for prestress engineering and a manufacturing method thereof belongs to the technical field of the prestress engineering. The manufacturing method comprises the following steps: 1, preparing a material which comprises 300 parts of Portland cement, 4-8 parts of a naphthalene water reducer, 1-2 parts of a calcium lignin sulphonate retarder, 88-100 parts of water and 2-7 parts of a paste thixotropic agent; 2, pouring water into a paste stirring tank, and pouring the naphthalene water reducer; 3, adding the Portland cement under stirring, and costarring for 4-6min to obtain a cement paste; 4, transferring the cement paste to a paste storage tank, allowing it to stand for 45min, adding the calcium lignin sulphonate retarder, and stirring for 4-6min to obtain a retardation paste; 5, allowing the retardation paste to continuously stand for 1h; and 6, adding the paste thixotropic agent while starting a stirrer to stir, and continuously stirring for 15-30s to obtain a thixotropic paste (the cement paste of the invention). The grouting of largely-bent pipelines can be once completed with the thixotropic paste, so the work efficiency and the construction quality are substantially improved.

Description

Technical field [0001] The present invention involves a prestressed engineering cement slurry. This cement slurry is a pre -grouting material for the nuclear power plant, which is especially suitable for bending pipes with a height difference of more than 1.2 meters.material.The present invention also involves a manufacturing method for a prestressed engineering, which is a prestressed engineering technology field. Background technique [0002] The prestressed system of nuclear power plants is generally divided into horizontal steel beams, vertical steel beams, gamma beams. These steel bundles are used to use the post -tension method for prestressed construction.In order to prevent the external harmful media from eroding the prestressed steel twisted and ensured the design life of the prestressed engineering, the cement slurry of the prestressed touct is needed to be authentic. [0003] First of all, the performance of the grouting cement slurry is stable, and the water secretion...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 王龙黄权余黄昏陶玉平吴国勤方辉煌
Owner CHINA NUCLEAR IND HUAXING CONSTR
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