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Self-curing high-bonding prestressed duct grouting material and preparation method thereof

A channel grouting and high-bonding technology, which is applied in the field of civil engineering construction, can solve problems such as low cohesion between steel bars and channel walls, corrosion of prestressed tendons, and insufficient grouting, so as to reduce segregation and bleeding capacity, High early strength and high bonding effect

Active Publication Date: 2018-02-09
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grouting material is more stable than the grouting agent, and the preparation is simple, but the cost is higher
For the latter, the water-cement ratio is too large, the layered bleeding is serious, the shrinkage after hardening is large, the early strength is low, the adhesion to the steel bar and the tunnel wall is not high, and it is easy to cause problems such as insufficient grouting and corrosion of prestressed tendons.

Method used

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  • Self-curing high-bonding prestressed duct grouting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example provides a kind of prestressed tunnel pressure slurry, by weight, the raw materials include the following composition: 80% ordinary Portland cement, 6% porous pozzolan, 8% modified chlorite powder, 4% vermiculite powder, 0.01% thickener, 1.5% U-shaped expansion agent, 0.25% new ester polycarboxylate water reducer, 0.05% tributyl phosphate defoamer, and the balance is water.

Embodiment 2

[0032] This example provides a kind of prestressed tunnel pressure slurry, by weight, the raw materials include the following composition: 80% ordinary Portland cement, 8% porous pozzolan, 6% modified chlorite powder, 1% MIM stainless steel Powder, 2% vermiculite powder, 0.01% thickener, 1.5% U-shaped expansion agent, 0.3% new ester polycarboxylate superplasticizer, 0.05% tributyl phosphate defoamer, and the balance is water.

Embodiment 3

[0034] This example provides a kind of prestressed tunnel pressure slurry, by weight, the raw materials include the following composition: 80% ordinary Portland cement, 10% porous pozzolan, 6% modified chlorite powder, 1% MIM stainless steel Powder, 2% vermiculite powder, 0.015% thickener, 1% U-shaped expansion agent, 0.3% new ester polycarboxylate superplasticizer, 0.05% tributyl phosphate defoamer, and the balance is water.

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Abstract

The invention provides a self-curing high-bonding force prestressed duct grouting material and a preparation method. Chlorite powder with pozzolanic activity, porous pozzolan, vermiculite powder, MIMstainless steel powder with good corrosion resistance and durability, a thickening agent, a defoaming agent, a water reducing agent and water are agitated, so that the self-curing high-bonding force prestressed duct grouting material is prepared. Not only does the prestressed duct grouting material prepared with the matching of the materials have a self-curing function, high early strength and high bonding force with reinforcements and duct walls, but also the stability of volume, the corrosion resistance of the reinforcements and the durability of a whole concrete structure are greatly increased.

Description

technical field [0001] The invention belongs to the field of civil engineering construction, and relates to a tunnel press slurry, in particular to a self-supporting high-bonding prestressed tunnel press slurry and a preparation method thereof. Background technique [0002] With the vigorous development of my country's infrastructure construction industry, post-tensioned prestressed concrete beams have been widely used in road and railway construction. As one of the key materials of prestressed concrete beams, channel grouting material can protect prestressed tendons from being exposed and corroded; it can effectively connect concrete and steel bars, ensure force transmission, and relieve fatigue damage of prestressed tendons and anchors ; It is of great significance to the safety and durability of concrete structures. Therefore, the quality of grouting materials is the key to ensure the quality of bridge construction. Because it is more and more widely used in engineering,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02
CPCC04B20/023C04B28/04C04B2201/50C04B14/16C04B14/041C04B14/202C04B14/34C04B24/2623C04B22/06C04B2103/0068C04B24/2605C04B24/045
Inventor 何锐龙景潭陈华鑫谈亚文王振军王铜
Owner CHANGAN UNIV
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