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Concrete crack repairing material based on nano material and preparation method thereof

A technology for crack repair and nanomaterials, which is applied in the field of concrete crack repair materials based on nanomaterials and its preparation, can solve the problems of poor repair effect and easy erosion of concrete, and achieve strain hardening performance, improved crack resistance and waterproof ability, low cost effect

Active Publication Date: 2022-07-15
浙大宁波理工学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a concrete crack repair material based on nanomaterials and its preparation method, to solve the technical problems of easy erosion of concrete in the marine environment and poor repair effect. Ratio, each raw material plays a synergistic role, and the prepared concrete repair material has good compressive strength, flexural strength and bond strength, and has excellent impermeability and frost resistance, and can be used for repairing concrete cracks in marine environments

Method used

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  • Concrete crack repairing material based on nano material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 8 parts of discarded seaweeds are dried and pulverized to 90 meshes to obtain seaweed powder;

[0032] (2) Mix seaweed powder, 45 parts of sulfoaluminate cement, 12 parts of natural sand and 7 parts of fly ash, then add 0.2 parts of naphthalene series superplasticizer, 8 parts of rust inhibitor (polyethylene in rust inhibitor) The mass ratio of imine, sodium silicate, ammonium persulfate and xylene thiourea is 3:7:4:2) and 27 parts of water, then stir, and stir for 8min at 250r / min;

[0033] (3) 1.5 parts of polyester fiber, 27 parts of nano-silica fume, 6 parts of calcium formate and 7 parts of anhydrous calcium sulfoaluminate were sequentially added, and stirred at 120 r / min for 13 minutes to obtain a concrete crack repair material based on nanomaterials.

Embodiment 2

[0035] (1) 5 parts of discarded seaweeds are dried and pulverized to 100 meshes to obtain seaweed powder;

[0036] (2) Mix seaweed powder, 40 parts of sulfoaluminate cement, 10 parts of natural sand, and 10 parts of fly ash, then add 0.1 part of naphthalene series superplasticizer, 5 parts of rust inhibitor (polyethylene in rust inhibitor) The mass ratio of imine, sodium silicate, ammonium persulfate and xylene thiourea is 2:8:3:2) and 24 parts of water, then stir, and stir for 10min at 200r / min;

[0037] (3) 1 part of polyester fiber, 30 parts of nano-silica fume, 5 parts of calcium formate and 8 parts of anhydrous calcium sulfoaluminate were sequentially added, and stirred at 100 r / min for 15 min to obtain a concrete crack repair material based on nanomaterials.

Embodiment 3

[0039] (1) 10 parts of discarded seaweeds are dried and pulverized to 80 meshes to obtain seaweed powder;

[0040] (2) Mix seaweed powder, 50 parts of sulfoaluminate cement, 15 parts of natural sand and 5 parts of fly ash, then add 0.5 part of naphthalene series superplasticizer, 10 parts of rust inhibitor (polyethylene in rust inhibitor) The mass ratio of imine, sodium silicate, ammonium persulfate and xylene thiourea is 5:5:5:1) and 30 parts of water, then stir, and stir at 300r / min for 5min;

[0041] (3) 2 parts of polyester fiber, 20 parts of nano-silica fume, 10 parts of calcium formate and 5 parts of anhydrous calcium sulfoaluminate were sequentially added, and stirred at 150 r / min for 10 minutes to obtain a concrete crack repair material based on nanomaterials.

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Abstract

The invention discloses a concrete crack repairing material based on a nano material and a preparation method of the concrete crack repairing material, and belongs to the technical field of building materials. The concrete crack repairing material is prepared from the following raw materials: seaweed, sulphoaluminate cement, natural sand, nano silicon powder, calcium formate, fly ash, anhydrous calcium sulphoaluminate, polyester fibers, a water reducing agent, a corrosion inhibitor and water. The invention also provides a preparation method of the concrete crack repairing material, the raw materials of the repairing agent are reasonably selected and proportioned, and all the raw materials synergistically play a role, so that the prepared concrete repairing material has good compressive strength, breaking strength and bonding strength, and is excellent in anti-permeability and anti-freezing performance; the method can be used for repairing concrete cracks in a marine environment, and has very important application value.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a nanomaterial-based concrete crack repair material and a preparation method thereof. Background technique [0002] Concrete cracks are physical structural changes caused by internal and external factors of the concrete structure, and cracks are the main reason for the reduction of the bearing capacity, durability and waterproofness of concrete structures. Concrete in the marine environment is more prone to cracking and spalling due to long-term intrusion by seawater and sea wind. Concrete cracks provide channels for corrosive media such as chloride ions, carbon dioxide and sulfate radicals, which will accelerate the corrosion of materials and The failure of concrete structures will even bring huge economic losses and serious safety problems. [0003] At present, there have been reports on concrete crack repair materials, but most of them are aimed at the repair of pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B22/02C04B14/06C04B16/06C04B18/08C04B18/24C04B22/14C04B24/04C04B24/00C04B24/26C04B111/72C04B103/30C04B103/65C04B103/61
CPCC04B28/06C04B18/248C04B14/068C04B18/08C04B22/02C04B24/04C04B22/148C04B16/0683C04B24/00C04B40/0039C04B2111/72C04B2111/00008C04B2103/302C04B2103/65C04B2103/61C04B2201/50C04B24/2652C04B12/04C04B22/147C04B24/20Y02W30/91C04B28/26C04B18/103C04B14/045C04B14/06C04B18/146C04B22/14C04B24/16C04B24/28C04B28/065C04B40/0046C04B2103/32C04B2111/00508
Inventor 潘崇根臧家伟廖盛查支祥张城
Owner 浙大宁波理工学院
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