Concrete surface protecting material and method of manufacturing the same

A technology for concrete surface and protective materials, applied in the field of concrete surface protective materials, can solve problems such as examples and research of anhydrous concrete projects, affecting the functions of water conservancy and hydropower projects, and national economic losses, achieving excellent mechanical properties and facilitating secondary repairs , the effect of increasing the solid content

Inactive Publication Date: 2008-12-10
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These water conservancy and hydropower projects already exist and will inevitably have concrete durability problems in the future. As time goes by, it will inevitably affect the normal and efficient performance of water conservancy and hydropower projects. This will not only affect the country's flood control safety, water conservancy Shipping and electric energy have a great impact, and are more likely to bring immeasurable losses to the national economy, so the research on the durability of hydraulic concrete is a top priority
[0003] Through a large number of investigations and analysis, there are currently no engineering examples and studies on hydraulic concrete surface protection in China, and there are few reports on related research and solutions abroad.
[0004] Since the outer surface of hydraulic concrete is generally subjected to various tests of temperature changes, water erosion, alternating dry and wet cycles, and freeze-thaw cycles, resulting in continuous weathering, erosion, and carbonization of the reinforced concrete surface, the protective material should not only have super aging resistance , but also have excellent mechanical properties, so the research and development of materials is relatively difficult
There are many kinds of polymer materials, but there are relatively few polymer materials that have both super aging resistance and excellent mechanical properties

Method used

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  • Concrete surface protecting material and method of manufacturing the same
  • Concrete surface protecting material and method of manufacturing the same
  • Concrete surface protecting material and method of manufacturing the same

Examples

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preparation example Construction

[0034]The concrete surface protection material of the present invention, it is made up of A component and B component, it is characterized in that described A component comprises polyaspartic acid ester, inorganic nanometer material, silane coupling agent, reactive diluent, described B The component is a curing agent, and the mass content of the raw material components is: 60-120 parts of polyaspartic acid ester, 1-50 parts of inorganic nanomaterials, 0.001-10 parts of silane coupling agent, 5-100 parts of reactive diluent parts, curing agent 30 to 250 parts. The preparation method of the polyaspartic acid ester comprises the following steps: ① adding 40-100 parts of difunctional primary amine into the reaction kettle; ② slowly adding 40-100 parts of maleic acid ester or fumaric acid while stirring Ester, and keep the temperature at about 30-40°C; ③ Vacuumize the reactor so that the pressure inside the reactor is -0.1MPa, and then fill the reactor with nitrogen to make the pre...

Embodiment 1

[0066] Preparation of concrete surface protection material CKT-A.

[0067] Add 40 parts of 3,3'-dimethyl 4,4'-dicyclohexylmethanediamine into the reaction kettle, slowly add 57.8 parts of diethyl maleate while stirring, and keep the temperature at about 30°C . Vacuumize the reactor so that the pressure inside the reactor is -0.1MPa, then fill the reactor with nitrogen to make the pressure inside the reactor zero, and do this 2 to 3 times. Continue to stir, raise the temperature to 90°C, and react for about 12 hours to obtain polyaspartic acid ester.

[0068] Select the curing agent 2,4-, 2,6-toluene diisocyanate mixture (TDI) and diphenylmethane diisocyanate (MDI) in a ratio of 1:10 at room temperature and mix well with a mixer.

[0069] Select reactive diluents ethylene glycol and propylene glycol at a ratio of 1:10 and mix thoroughly with a mixer at room temperature.

[0070] Add 15 parts of nano-SiO to 60 parts of polyaspartate 2 , 2 parts of silane coupling agent KH550...

Embodiment 2

[0074] Preparation of concrete surface protection material CKT-B.

[0075] Add 58.4 parts of dicyclohexylmethanediamine into the reaction kettle, slowly add 80 parts of dimethyl maleate while stirring, and keep the temperature at about 40°C. Vacuumize the reactor so that the pressure inside the reactor is -0.1MPa, then fill the reactor with nitrogen to make the pressure inside the reactor zero, and do this 2 to 3 times. Continue to stir, raise the temperature to 100°C, and react for about 10 hours to obtain polyaspartic acid ester.

[0076] Select the curing agent isophorone-diisocyanate (IPDI) and 1,6-hexamethylene diisocyanate (HDI) in a ratio of 10:1 and mix thoroughly with a mixer at room temperature.

[0077] The active diluent ethylene glycol and polyethylene glycol are selected to be fully mixed with a mixer at room temperature at a ratio of 10:1.

[0078] Add 20 parts of nano-CaCO to 80 parts of polyaspartate 3 , 2 parts of silane coupling agent KH151 and 50 parts of ...

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Abstract

Concrete surface protection material consists of a component A and a component B. The component A comprises poly-aspartate, inorganic nano material, a silane coupler and a reactive diluent. The component B comprises a curative agent. The material overcomes the concrete defects of bad mechanical property, poor capacity of bearing temperature variation, wetting and drying alternation, and freezing and thawing cycle, vulnerability to damage, etc. The concrete surface protection material is easy in construction and convenient in secondary repair with super ageing resistance and excellent mechanical property. The material can not only meet the need of concrete surface protection, but also serve as a metal corrosion prevention material. The invention also discloses a preparation method for the concrete surface protection material.

Description

technical field [0001] The invention relates to a concrete surface protection material, and also relates to a preparation method of the concrete surface protection material. Background technique [0002] In order for the Three Gorges Project and other high dams and reservoirs to be used for a long time, in addition to the various raw materials and mixed products used to build the dam without volume stability accidents after a long period of use, it is important that the concrete no longer occurs. destroy. The damage of concrete always starts from the surface and expands inward. The outer surface of the concrete dam has to withstand various tests of temperature changes, water erosion, alternating dry and wet cycles, and freeze-thaw cycles, thereby continuously weathering, denuding, and gradually carbonizing the reinforced concrete surface. development, and ultimately endanger the safety of the dam. In order to prevent the service life of the dam from being affected by concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/65
CPCC04B41/483C04B41/009C04B2111/00482C04B2111/2038C04B2111/26
Inventor 邹涛韩炜李珍汪在芹魏涛邵小妹蔡胜华李晓鄂
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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