Prestressed duct grouting material reinforced by oxidized graphene and preparation method of prestressed duct grouting material

A technology for channel grouting and grouting material, applied in sustainable waste treatment, solid waste management, climate sustainability, etc. Volume stability, reduced bleeding rate, improved fluidity effects

Inactive Publication Date: 2016-11-09
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the above-mentioned deficiencies of the prior art, uses graphene oxide as a reinforcing material, and adds chemical admixtures such as expansion agent and rust inhibitor, and is used for the preparation of prestressed tunnel grouting materials, so as to solve the strength and flow problems of traditional grouting materials. Graphene oxide reinforced prestressed tunnel grouting material that meets the requirements of post-tensioned prestressed concrete structure construction due to large performance fluctuations such as degree, bleeding, and volume change

Method used

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  • Prestressed duct grouting material reinforced by oxidized graphene and preparation method of prestressed duct grouting material
  • Prestressed duct grouting material reinforced by oxidized graphene and preparation method of prestressed duct grouting material
  • Prestressed duct grouting material reinforced by oxidized graphene and preparation method of prestressed duct grouting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Calculated by weight components, the raw material components of the grouting material in this embodiment are as follows: 900 parts of cement, 135 parts of fly ash, 15 parts of graphene oxide, 80 parts of expansion agent, 12 parts of high-efficiency water reducer, 42 parts of rust inhibitor parts, 340 parts of water.

[0027] The preparation steps are as follows: Weigh each raw material according to the proportion of the formula, first dry mix cement, fly ash, expansion agent and rust inhibitor in the mixer for 25-30 seconds, then pour 80% of the total water consumption of the formula and stir for 90 seconds -100s, then pour the water reducing agent into the mixer and stir with the slurry for 120-150s, and finally mix the graphene oxide and the remaining 20% ​​water in the container, stir evenly and pour the mixture into the mixer with the slurry Stirring is continued for 90-100s, and the graphene oxide reinforced prestressed hole grouting material is obtained. The tech...

Embodiment 2

[0031] Calculated by weight components, the raw material components of the grouting material in this embodiment are as follows: including 1000 parts of cement, fly ash 80 share , 11 parts of graphene oxide, 90 parts of expansion agent, 15 parts of superplasticizer, 35 parts of rust inhibitor, and 330 parts of water.

[0032] The preparation method is the same as in Example 1. The technical indicators are shown in Table 2.

[0033] The technical indicator of table 2 embodiment 2

[0034]

[0035]

Embodiment 3

[0037] Calculated by weight components, the raw material components of the grouting material in this embodiment are as follows: 1050 parts of cement, 50 parts of fly ash, 6 parts of graphene oxide, 100 parts of expansion agent, 18 parts of high-efficiency water reducer, and 30 parts of rust inhibitor parts, 330 parts of water.

[0038] The preparation method is the same as in Example 1. The technical indicators are shown in Table 3.

[0039] The technical index of table 3 embodiment 3

[0040]

[0041] It can be seen from the foregoing examples that the grouting material obtained by the technical solution of the present invention has excellent workability, strength, volume stability and durability; Large and other problems, so as to meet the requirements of post-tensioned prestressed concrete structure construction.

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Abstract

The invention relates to a prestressed duct grouting material reinforced by oxidized graphene. The grouting material is characterized by being prepared from the following components in parts by weight: 800-1000 parts of cement, 50-150 parts of fly ash, 2-20 parts of oxidized graphene, 80-120 parts of an expansion agent, 12-18 parts of a high efficiency water reducing agent, 30-50 parts of a corrosion inhibitor and 300-390 parts of water. The prestressed duct grouting material disclosed by the invention has the advantages that the oxidized graphene is used as a reinforcing material, and chemical admixtures of the expansion agent, the corrosion inhibitor and the like are added, so that the prestressed duct grouting material is prepared, and the problem that properties of the intensity, the fluidity, the weepage, the volume change and the like of a conventional grouting material are large in fluctuation is solved, and the requirement for construction of a post tensioning prestressed concrete structure is met.

Description

technical field [0001] The invention belongs to the field of civil engineering materials, and relates to a graphene oxide reinforced prestressed tunnel grouting material and a preparation method thereof. Background technique [0002] The post-tensioned prestressed concrete structure is to penetrate the prestressed steel bar in the reserved channel of the concrete member, then stretch and anchor, and finally pour the grouting material into the channel to form a bonded stress state, which has good crack resistance, Due to its high rigidity and other advantages, it has been more and more widely used in high-rise long-span structures and bridge engineering. [0003] Prestressed tunnel grouting materials have an important influence on the safety and durability of prestressed concrete structures. The grouting material should be full to ensure the effective transmission of prestress, and should have good durability to provide additional anti-corrosion protection for prestressed st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/08C04B14/02C04B103/30C04B103/61C04B111/70
CPCC04B28/00C04B2111/70C04B2201/50C04B18/08C04B14/024C04B2103/0068C04B2103/302C04B2103/61Y02W30/91
Inventor 徐亦冬吴萍沈建生
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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