Multifunctional concrete structure endurance protective agent, preparation and application method thereof

A technology of concrete structure and durability, applied in the field of concrete protective agent, can solve the problems of single function and poor product stability.

Inactive Publication Date: 2011-10-19
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies of the organic / inorganic materials themselves and to overcome the shortcomings of poor stability and single function of the compounded product, the present invention provides a material with the properties of penetration, rust resistance, densification, hydrophobicity, self-cleaning and environmental friendliness. Multifunctional concrete structure durable protective agent and its preparation and application method

Method used

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  • Multifunctional concrete structure endurance protective agent, preparation and application method thereof
  • Multifunctional concrete structure endurance protective agent, preparation and application method thereof
  • Multifunctional concrete structure endurance protective agent, preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Mix 0.1 kg of aluminum isopropoxide, 0.3 kg of butyl titanate, 1.7 kg of tetraethyl silicate, and 6 kg of absolute ethanol, and put them into a separatory funnel for later use; mix 10 kg of absolute ethanol, 0.4 kg of distilled water Kilogram and 0.1 kilogram of ammoniacal liquor (mass fraction is 25%) join in the reactor that reflux condensing device and electric stirrer are housed, stir 1-2 hour with the speed of 150 rev / mins, mix homogeneously and heat up; When temperature rises to At 45-60°C, drop the organic alkoxide and ethanol mixture into the reactor, stir rapidly at 200 rpm, and react for 2-4 hours; slowly stir and age at room temperature for 24 hours to obtain the alcohol of inorganic nanomaterials Sol. Under the condition of low-speed stirring, add 0.18 kg of methacryloxypropyltrimethoxysilane dropwise into the alcohol sol of inorganic nanomaterials, react at room temperature for 22 hours, raise the temperature to 50°C and react at constant temperature for 2 ...

Embodiment 2

[0103] Synthesis and preparation of the organic / inorganic composite fluorosilicone acrylic polymer emulsion is the same as in Example 1.

[0104] 0.3 kg of sodium silicate, 1.2 kg of lithium silicate, 0.6 kg of sodium molybdate, 0.6 kg of sodium sulfate, 0.03 kg of nano-titanium dioxide, 0.02 kg of sodium tetraborate, and / or inorganic composite fluorosilicone acrylic polymer emulsion (solid content is about 18%) 75 kg and 20 kg of distilled water are added in a mixer with a stirrer. Then, the mixed solution of 0.3 kg of benzotriazole and 1 kg of absolute ethanol is added into the mixer, and mixed evenly at a speed of 100 rpm at room temperature, that is, a multi-functional concrete structure durable protective agent.

Embodiment 3

[0106] Synthesis and preparation of the organic / inorganic composite fluorosilicone acrylic polymer emulsion is the same as in Example 1.

[0107] 1 kg of sodium silicate, 0.9 kg of lithium silicate, 0.5 kg of sodium molybdate, 1 kg of sodium sulfate, 0.02 kg of nano-titanium dioxide, 0.03 kg of sodium tetraborate, and organic / inorganic composite fluorosilicone acrylic polymer emulsion (solid content is about 18%) 70 kg and 25 kg of distilled water are added in a mixer with a stirrer. Then, add 1.5 kg of dehydrated alcohol mixed solution with 0.2 kg of benzotriazole into the mixer, and mix evenly at a speed of 100 rpm at room temperature to obtain a multifunctional concrete structure durable protective agent.

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Abstract

The invention discloses a multifunctional concrete structure endurance protective agent as well as the preparation and application method thereof. The protective agent provided by the invention contains the following ingredients of: an organic / inorganic composite fluorosilicone-acrylate copolymer, lithium silicate, sodium silicate, lithium molybdate, sodium tetraborate, sal glauberi, 1,2-aminoazophenylene, nanometer titanium dioxide, anhydrous ethanol and water. The protective agent can penetrate inside concrete, wherein a densification ingredient can minimize internal holes and cracks to raise the compactness of concrete, and a rust-resistant ingredient can penetrate into concrete and be adsorbed on the surface of steel bar so as to passivate and protect the steel bar; the low-surface energy silicon fluoride ingredient can be solidified to form a cured film on the surface of concrete so as to endow the protective agent with the hydrophobic performance; a nanometer ingredient can endow the cured film layer with properties of resisting ultraviolet and ageing and improving the organic polymer performance as well as the self-cleaning performance. In addition, hydroxy generated from the hydrolysis of siloxane group can perform a condensation reaction with hydroxy on the surface of concrete to produce chemical bond, so as to raise the anchoring strength between the film and concrete and improve the interface combination. The protective agent provided by the invention can be widely applied in various concrete structure engineering protections to raise the service life of concrete.

Description

technical field [0001] The invention relates to a concrete protective agent, in particular to a protective agent capable of improving the durability of reinforced concrete and a preparation and application method thereof. Background technique [0002] Concrete is the most commonly used bulk building material today because it can meet engineering needs and is cost-effective. Concrete is a porous material, and external water, air and corrosive substances (such as chloride ions, sulfates and carbon dioxide, etc.) can enter the interior of the concrete through the pores. In short, pores are channels for the exchange of matter and energy between the external environment and the interior of concrete. Under the interaction of physical and chemical factors such as temperature, humidity, airflow, water flow and light in the external environment, concrete is extremely prone to erosive damage. A large number of researches and engineering practices have shown that the durability of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50
CPCC04B41/009C04B41/5089
Inventor 余志武刘鹏黄可龙宋力何章兴
Owner CENT SOUTH UNIV
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