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Prestressed pipeline grouting material and preparation method thereof

A technology of prestressed pipes and rice husk ash, which is applied in the field of prestressed tunnel grouting materials, prestressed pipe grouting materials, and the preparation of the above materials, to achieve the effects of improving large shrinkage, protecting the environment, and reducing consumption

Active Publication Date: 2015-04-01
CCCC SHEC WUHAN PORT NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are no relevant research reports on the use of steel slag powder, zeolite powder and ground rice husk ash as a composite admixture for prestressed tunnel grouting materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the prestressed pipeline grouting material provided in this embodiment is as follows:

[0026] (1) Proportion of raw materials: according to the mass percentage of each component, cement 65%, steel slag 15%, zeolite 5%, rice husk ash 9.4%, expansion agent 5%, powdery superplasticizer 0.5%, defoamer 0.04 %, retarder 0.06%, accurately weigh the above components; the cement is ordinary Portland cement, the strength grade is 42.5; the expansion agent is calcium sulfoaluminate-calcium oxide composite expansion agent, powdery high-efficiency water reducer The powdered polycarboxylate water reducer is selected, the defoamer is polysiloxane defoamer, and the retarder is powdered sodium gluconate.

[0027] (2) Grind steel slag, zeolite, and rice husk ash in a high-efficiency open-flow grinding mill to a specific surface area of ​​450m 2 / kg, 600m 2 / kg㎏ and 760m 2 / kg, to obtain steel slag micropowder, zeolite powder and ground rice husk ash;

[002...

Embodiment 2

[0033] (1) Proportion of raw materials: according to the mass percentage of each component, cement 65%, steel slag 20%, zeolite 5%, rice husk ash 5%, expansion agent 4.5%, powdery superplasticizer 0.45%, defoamer 0.02 %, retarder 0.03%, accurately weigh the above components; the cement is ordinary Portland cement, the strength grade is 42.5; the expansion agent is calcium sulfoaluminate-calcium oxide composite expansion agent, powdery high-efficiency water reducer The powdered polycarboxylate water reducer is selected, the defoamer is polysiloxane defoamer, and the retarder is powdered sodium gluconate.

[0034] (2) Grind steel slag, zeolite, and rice husk ash in a high-efficiency open-flow grinding mill to a specific surface area of ​​450m 2 / kg, 600m 2 / kg㎏ and 760m 2 / kg, to obtain steel slag micropowder, zeolite powder and ground rice husk ash;

[0035] (3) dry-mix the above-mentioned components in a dry mixer for 10 minutes according to the proportion weighed in step (1)...

Embodiment 3

[0041] (1) The ratio of raw materials: according to the mass percentage of each component, cement 60%, steel slag 15%, zeolite 10%, rice husk ash 9%, expansion agent 5.3%, powdery superplasticizer 0.65%, defoamer 0.03 %, retarder 0.02%, accurately weigh the above components; the cement is ordinary Portland cement, the strength grade is 42.5; the expansion agent is calcium sulfoaluminate-calcium oxide composite expansion agent, powdery high-efficiency water reducer The powdered polycarboxylate water reducer is selected, the defoamer is polysiloxane defoamer, and the retarder is powdered sodium gluconate.

[0042] (2) Grind steel slag, zeolite, and rice husk ash in a high-efficiency open-flow grinding mill to a specific surface area of ​​450m 2 / kg, 600m 2 / kg㎏ and 760m 2 / kg, to obtain steel slag micropowder, zeolite powder and ground rice husk ash;

[0043] (3) dry-mix the above-mentioned components in a dry mixer for 10 minutes according to the proportion weighed in step (...

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Abstract

The invention provides a prestressed pipeline grouting material. The material comprises the following components in percentage by mass: 50-77% of cement, 10-20% of steel slag micro-powder, 5-10% of zeolite powder, 5-15% of grinded rice hull ash, 2-9% of expander, 0.3-1.5% of powdery high-performance water reducer, 0.02-0.04% of defoamer and 0.02-0.06% of retarder. The invention further provides a preparation method of the material simultaneously. The scheme provided by the invention is used for solving the defects in the prior art; steel slag micro-powder, zeolite powder and grinded rice hull ash are used in the material as admixtures; the problems of shrinkage and bleeding are solved by comprehensively utilizing the advantages of the various admixtures, and the durability of the grouting material is improved; meanwhile, the steel slag, zeolite and rice hull ash resources are greatly utilized.

Description

technical field [0001] The invention relates to a prestressed pipeline grouting material, in particular to a prestressed channel grouting material prepared by using steel slag powder-zeolite powder-ground rice husk ash as an admixture. The invention also provides the above-mentioned A material preparation method belongs to the technical field of building materials. Background technique [0002] The tunnel grouting is regarded as the last line of defense to prevent the corrosion of the prestressed tendons in the prestressed concrete structure, and it shoulders the heavy responsibility of ensuring the safety, reliability and durability of the prestressed structure. It is a mixed material composed of expansion agent, mineral powder or finely ground slag, silica fume and other materials. Since there is no aggregate such as sand and gravel, it has high shrinkage. At the same time, the grouting material must meet the corresponding fluidity, bleeding rate, expansion rate, strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/30
CPCY02W30/91
Inventor 李顺凯明阳韦鹏亮邓翀屠柳
Owner CCCC SHEC WUHAN PORT NEW MATERIALS
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