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Repair material and repair method for improving structural toughness of high-pile wharf of port

A high-pile wharf and repair material technology, which is applied in basic structure engineering, sheet pile wall, marine engineering and other directions, can solve the problems of concrete cracking, affecting the structural toughness of high-pile wharf, etc. The effect of impact resistance

Inactive Publication Date: 2021-12-10
TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of high salt, high humidity, and high corrosion in the marine environment, the steel bars in the high-pile wharf structure corrode due to chloride ion corrosion and cause concrete cracking, which affects the toughness of the high-pile wharf structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Repair materials for improving the structural toughness of high-piled docks in ports. The repair materials include: pouring materials and protective layers; pouring materials include mixed mortar matrix mixed with short fibers and repair capsules; protective layers include 6 layers of carbon fiber cloth.

[0029] In terms of mass fraction, the mixed mortar matrix includes 1 part of cement, 0.6 part of water, 4 parts of fine aggregate with a particle size of 0.3 mm, 3 parts of fly ash, 1 part of silica fume, 0.5 part of granulated blast furnace slag, 0.5 Parts of metakaolin, in which the fine aggregate is made by mixing mellow feldspar rock and limestone with a mass ratio of 2:5.

[0030] The short fibers are doped in the mixed mortar matrix with a volume content of 3%. In this embodiment, the short fibers are polyvinyl alcohol fibers and aramid fibers with a volume ratio of 1:1, and the aramid fibers are selected from polyvinyl alcohol fibers and aromatic polyamide fiber...

Embodiment 2

[0041] Different from Example 1, in this example, in terms of mass fraction, the mixed mortar matrix includes 1 part of cement, 0.6 part of water, 3 parts of fine aggregate with a particle size of 0.3 mm, 3 parts of fly ash, and 0.7 part of silicon Ash, 0.7 part of granulated blast furnace slag, 0.8 part of metakaolin, wherein the fine aggregate is made by mixing mellow feldspar rock and limestone with a mass ratio of 3:5.

[0042] The short fibers are doped in the mixed mortar matrix at a volume content of 2%. In this embodiment, the short fibers are polyvinyl alcohol fibers.

[0043] The repairing capsule is doped in the mixed mortar matrix at a volume content of 3%. The repairing capsule is a hollow structure, the outer shell is made of calcium hydroxide, and the inside of the repairing capsule is filled with compressed inert gas argon.

Embodiment 3

[0045]Different from Example 1, in this example, in terms of mass fraction, the mixed mortar matrix includes 1 part of cement, 0.55 parts of water, 4 parts of fine aggregate with a particle size of 0.4 mm, 3 parts of fly ash, and 0.7 part of silicon Ash, 0.8 part of granulated blast furnace slag, 0.7 part of metakaolin, wherein the fine aggregate is made by mixing mellow feldspar rock and limestone with a mass ratio of 2:5.

[0046] The short fibers are doped in the mixed mortar matrix at a volume content of 2%. In this embodiment, the short fibers are aromatic polyamide fibers, and poly-p-phenylene terephthalamide fibers are selected as the aromatic polyamide fibers.

[0047] The repairing capsule is doped in the mixed mortar matrix at a volume content of 3%. The repairing capsule is a hollow structure, the outer shell is made of calcium hydroxide, and the inside of the repairing capsule is filled with compressed inert gas argon.

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Abstract

The invention provides a repair material and a repair method for improving the structural toughness of a high-pile wharf of a port. The repair material comprises a pouring material and a protective layer, wherein the pouring material comprises a mixed mortar base body mixed with short fibers and repairing capsules; and the protective layer comprises 5-7 carbon fiber cloth layers. The repairing material comprises a pouring material and a protective layer. Chloride ion erosion in seawater can cause serious damage to reinforced concrete structures such as wharfs serving in the marine environment and is a main factor influencing the durability of the concrete structures in the marine environment, and the protective layer is beneficial to resisting chlorine salt erosion on the surface of a pile foundation of the high-pile wharf, reducing attachment of chlorine salt to a pile body and primarily preventing the chlorine salt from permeating into the wharf pile and corroding reinforced steel bars; and secondly, along with continuous reaction of a shell of the repairing capsule, the repairing capsule continuously and slowly releases inert gas outwards, so that further diffusion of oxygen is slowed down, and the existence time of a passive film of the steel bars in the pile foundation is guaranteed and prolonged, and the steel bars are protected, and the corrosion speed of the steel bars is slowed down.

Description

technical field [0001] The invention relates to a repair material and a repair method for improving the structural toughness of a high-pile wharf in a port, and belongs to the technical field of high-pile wharf repair. Background technique [0002] The high-pile wharf structure is mostly used for port wharf construction on muddy coasts. However, due to the characteristics of high salt, high humidity, and high corrosion in the marine environment, the steel bars in the high-pile wharf structure corrode due to chloride ion corrosion and cause concrete cracking, which affects the toughness of the high-pile wharf structure. Reinforced concrete structures serving in the marine environment, such as wharfs and offshore structures, sea-crossing bridges, etc., the cracking of reinforced concrete caused by chloride ion erosion is the main factor affecting the toughness and durability of the structure, so the present invention relates to an energy Improve the repair materials and corre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B20/00C04B22/00E02B3/06E02D5/64E02D15/02E02D27/12C04B103/60C04B111/10C04B111/24C04B111/26C04B111/27
CPCC04B28/02C04B22/00C04B20/004E02D27/12E02D15/02E02D5/64E02B3/068C04B2111/24C04B2103/608C04B2201/50C04B2111/1062C04B2111/26C04B2111/27C04B18/08C04B18/146C04B18/142C04B14/106C04B14/26C04B14/4643C04B16/0641C04B16/0691
Inventor 刘红彪刘正滨邢东亮冯伟伟刘广波隋洪福
Owner TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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