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Reinforcing steel bar rust-prevention material applicable to interior of concrete and application of reinforcing steel bar rust-prevention material

A technology for concrete and steel bars, which is applied in the field of anti-rust materials for steel bars. It can solve the problems of inability to prevent rust for concrete and steel bars, poor anti-rust effect, and difficult anti-rust materials. It achieves strong anti-corrosion ability, simple use method, and direct anti-rust effect More effect

Active Publication Date: 2016-07-20
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the characteristics and usage of rust-resistant materials, it is difficult for the rust-resistant materials to evenly adhere to the surface of the steel bars inside the concrete, so the rust-resistant effect is not satisfactory.
In addition, although there are many kinds of antirust materials on metal surfaces in civil engineering, these materials are mostly used in steel structures, that is, metal materials are directly exposed to the surrounding atmospheric environment, and there are no other covering materials on the surface except antirust materials, and due to Limited by material properties, it cannot be directly used for rust prevention of steel bars inside concrete

Method used

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  • Reinforcing steel bar rust-prevention material applicable to interior of concrete and application of reinforcing steel bar rust-prevention material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The magnesium aluminum carbonate hydrotalcite was calcined in an environment of 550°C. Raise the temperature at a rate of 3.5°C / min, keep the temperature for 4.5 hours, cool naturally to room temperature, crush and grind, and pass through a 200-mesh sieve to obtain calcined magnesium aluminum carbonate hydrotalcite;

[0026] Preparation of solid powder: Weigh cement, fly ash and calcined magnesium aluminum carbonate hydrotalcite respectively, and stir and mix in a mixer to obtain solid powder, wherein the mixed mass percentages of solid powder are: cement 15%, fly ash 20% and calcined magnesium aluminum carbonate hydrotalcite 65%;

[0027] Preparation of mixed liquid: Weigh diethanolamine, dimethylethanolamine and saturated aqueous calcium hydroxide solution respectively, place the three substances in a container, and mix them with a mixer to obtain a mixed liquid, wherein the mixed mass percentages of the mixed liquid are respectively : 20% diethanolamine, 10% dimethy...

Embodiment 2

[0031] The magnesium aluminum hydrotalcite was calcined in an environment of 500°C. Raise the temperature at a rate of 4°C / min, keep the temperature for 5 hours, cool naturally to room temperature, crush and grind, and pass through a 270-mesh sieve to obtain calcined magnesium aluminum nitrate hydrotalcite;

[0032] Preparation of solid powder: Weigh cement, fly ash and calcined magnesium aluminum nitrate hydrotalcite respectively, and stir and mix in a mixer to obtain solid powder, wherein the mixed mass percentages of solid powder are: cement 20%, fly ash 20% and calcined magnesium aluminum nitrate hydrotalcite 60%;

[0033] Preparation of mixed liquid: Weigh diethanolamine, dimethylethanolamine and saturated aqueous calcium hydroxide solution respectively, place the three substances in a container, and mix them with a mixer to obtain a mixed liquid, wherein the mixed mass percentages of the mixed liquid are respectively : diethanolamine 30%, dimethylethanolamine 20%, satur...

Embodiment 3

[0037] The magnesium aluminum hydrotalcite is calcined in an environment of 450°C. Raise the temperature at a rate of 4.5°C / min, keep the temperature for 5.5 hours, cool to room temperature naturally, crush and grind, and pass through a 270-mesh sieve to obtain calcined magnesium aluminum nitrate hydrotalcite;

[0038] Preparation of solid powder: Weigh cement, fly ash and calcined magnesium aluminum nitrate hydrotalcite respectively, and stir and mix in a mixer to obtain solid powder, wherein the mixed mass percentages of solid powder are: cement 20%, fly ash 15% and calcined magnesium aluminum nitrate hydrotalcite 65%;

[0039] Preparation of mixed liquid: Weigh diethanolamine, dimethylethanolamine and saturated aqueous calcium hydroxide solution respectively, place the three substances in a container, and mix them with a mixer to obtain a mixed liquid, wherein the mixed mass percentages of the mixed liquid are respectively : diethanolamine 30%, dimethylethanolamine 15%, sa...

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Abstract

The invention relates to the technical field of building materials, in particular to a reinforcing steel bar rust-prevention material applicable to the interior of concrete and application of the reinforcing steel bar rust-prevention material.The reinforcing steel bar rust-prevention material is formed by mixing solid powder and mixed liquid in proportion and can directly act on the surfaces of reinforcing steel bars inside the concrete without affecting cohesiveness between the reinforcing steel bars and the concrete.The reinforcing steel bar rust-prevention material is simple in application method, more direct in rust-prevention effect and longer in anti-rust effect, and meanwhile the material has the advantages of being great in chloridion curing capability and great in surface alkality, so that the material is greater in anti-rust capability.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a steel bar antirust material suitable for inside concrete and its application. Background technique [0002] The corrosion of steel bars caused by chloride corrosion is one of the most important reasons for the deterioration of the durability of concrete structures. In coastal areas where saline-alkali and deicing salt are used, the use of anti-rust materials has become an important technical measure to inhibit the corrosion of steel bars inside concrete structures. At present, there are many kinds of rust inhibitors, which can be divided into inorganic type, organic type and compound type according to the difference of their components. There are two main ways to use the traditional anti-corrosion materials for concrete reinforcement. One is to add directly to the concrete, and the other is to spray on the outer surface of the concrete and then penetrate into the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/61
CPCC04B40/0039C04B2103/61C04B18/08C04B22/10C04B24/122C04B22/064C04B7/02C04B32/02C04B22/085
Inventor 耿健俞俊杰殷旭钱进祝新强黄晨宇李鹏鹏
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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