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High-early strength anti-seepage cement-based grouting material containing graphene oxide and preparation method thereof

A grouting material, cement-based technology, applied in the field of grouting materials, can solve the problems of reducing the early strength, early strength and impermeability of sulphoaluminate cement-based grouting materials

Pending Publication Date: 2019-03-22
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure the workability and injectability of the grout, a larger water-cement ratio is often required to ensure better fluidity of the cement slurry, which will inevitably reduce the early strength of the sulphoaluminate cement-based grouting material
[0004] The method of adding traditional early strength agents can promote the formation of more hydration products in the early stage to improve the early strength of sulphoaluminate cement-based grouting materials to a certain extent, but these traditional early strength agents accelerate the mineral hydration mechanism. Correspondingly, too many defects are formed in the early hydration microstructure.
This will inevitably have a great negative impact on the early strength and impermeability of the cement-based material grouted concretions.

Method used

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  • High-early strength anti-seepage cement-based grouting material containing graphene oxide and preparation method thereof

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preparation example Construction

[0048] In order to further understand the cement-based grouting material of the present invention, the present invention also provides a method for preparing a high-early-strength anti-seepage cement-based grouting material, comprising the following steps:

[0049] S1, preparation of graphene oxide

[0050] Graphene oxide was prepared by the Hummers method;

[0051] s11. Add 2-4g (such as 2g, 2.5g, 3g, 3.5g, 4g) graphite, 60-80ml (such as 62ml, 64ml, 66ml, 68ml, 70ml, 72ml, 74ml, 76ml, 78ml) concentrated sulfuric acid to the container and 1~3g (such as 1.5g, 2g, 2.5g) of sodium nitrate, cooled to 0~5°C (such as 0°C, 1°C, 2°C, 3°C, 4°C) in an ice bath, and slowly added under stirring 10-20g (such as 12g, 14g, 16g, 18g) potassium permanganate (slowly added in portions within 30min)), and control the temperature of the reaction solution in the process at 0-15°C (such as 1°C, 2°C, 3°C, 4°C, 5°C, 6°C, 7°C, 8°C, 9°C, 10°C, 11°C, 12°C, 13°C, 14°C) for 2 to 4 hours (such as 2.5h, 3h...

Embodiment 1

[0062] A high-early-strength anti-seepage cement-based grouting material and its preparation method provided by the embodiment of the present invention, according to the following components and steps:

[0063] S1, preparation of graphene oxide

[0064] Graphene oxide was prepared by the Hummers method;

[0065] s11. Add 3g of graphite, 70ml of concentrated sulfuric acid and 2g of sodium nitrate to the container, cool to 5°C in an ice bath, and slowly add 15g of potassium permanganate (slowly added within 30 minutes) under stirring conditions to control the reaction during the process The liquid temperature was reacted at 15°C for 3h;

[0066] s12. Put the container in a constant temperature water bath at 40°C, and continue to stir for 0.5h; then slowly add 50ml of deionized water under stirring conditions, so that the temperature of the reaction solution reaches 98°C, and continue to stir for 30min after reaching the temperature, and the reaction is completed to obtain a mix...

Embodiment 2

[0077] A high-early-strength anti-seepage cement-based grouting material and its preparation method, according to the following components and steps:

[0078] S1, preparation of graphene oxide

[0079] Graphene oxide was prepared by the Hummers method;

[0080] s11. Add 2g of graphite, 60ml of concentrated sulfuric acid and 1g of sodium nitrate to the container, cool to 5°C in an ice bath, and slowly add 10g of potassium permanganate (slowly added within 30min) under stirring conditions to control the reaction during the process The liquid temperature was reacted at 15°C for 3h;

[0081] s12. Put the container in a constant temperature water bath at 35°C, and continue to stir for 0.5h; then slowly add 50ml of deionized water under stirring conditions, so that the temperature of the reaction solution reaches 98°C, and continue to stir for 30min after reaching the temperature, and the reaction is completed to obtain a mixed solution ;

[0082] s13. Finally, dilute the mixed s...

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Abstract

The invention provides a high-early strength anti-seepage cement-based grouting material containing graphene oxide and a preparation method thereof. The grouting material comprises the following components: 70-85 parts of sulphoaluminate cement and 10-20 of fly ash, 5-10 parts of a suspending agent, 0.75-1.25 parts of a water reducing agent, 0.02-0.05 part of an early strength agent, 0.2-0.8 partof a defoaming agent, 1.0-2.5 parts of a retarder, 0.05-0.2 part of graphene oxide and 50-60 parts of water. The preparation method of the cement-based grouting material comprises the following stepsof: 1, preparation of the graphene oxide; 2, ball milling of raw materials; and 3, preparation of the cement-based grouting material. Through adding the graphene oxide in the cement-based grouting material, the generation of internal defects in a hydrated microstructure in the early hydration stage of the sulphoaluminate cement-based grouting material, thereby improving the early strength of the cement-based grouting material and enhancing the anti-seepage performance and durability of stone bodies.

Description

technical field [0001] The invention belongs to the technical field of grouting materials, and in particular relates to a high-early-strength anti-seepage cement-based grouting material containing graphene oxide and a preparation method thereof. Background technique [0002] At present, the commonly used grouting materials mainly include chemical grouting materials and cement grouting materials. Compared with chemical grouting materials, cement grouting materials have the advantages of wide source of raw materials, cheap, non-toxic, corrosion-resistant High strength, good durability and other advantages, so it is widely used in various fields of grouting engineering. [0003] Sulphoaluminate cement has the characteristics of short setting time, rapid strength development, and micro-expansion of stones due to its fast mineral hydration reaction. It is often used to prepare early-strength grouting materials to meet some special grouting projects. needs, such as rapid repair, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/70
CPCC04B28/06C04B2111/00293C04B2111/70C04B2201/50C04B18/08C04B14/104C04B2103/302C04B22/10C04B2103/50C04B24/10C04B14/024
Inventor 张建武汪潇杨留栓李志新张小婷李青霄徐卓越金彪王继娜丁凌凌
Owner HENAN UNIV OF URBAN CONSTR