A kind of nano flame-resistant concrete protective coating and preparation method thereof

Abstract

The invention discloses a nano flame-resistant concrete protective coating and a preparation method thereof, wherein the protective coating comprises the following ingredients in parts by weight: 55-75 parts of modified nano-silica sol emulsion, 8-10 parts of attapulgite whiskers, Schiff base modified 3-5 parts of non-toxic graphene compound, 0.2-0.5 parts of wetting and dispersing agent, 0.2-0.5 parts of thickener, 0.2-0.5 parts of defoamer, 1-3 parts of leveling agent, 25-35 parts of deionized water . The preparation process is as follows: mix the modified nano-silica sol emulsion, attapulgite whiskers, and Schiff base modified graphene compound according to the above protective coating formula, and use a high-speed disperser to stir and disperse at high speed for 30-60min; then the above protective coating Add the remaining wetting and dispersing agent, thickener, defoamer, leveling agent, and deionized water to the formula; adjust the state of the high-speed disperser to medium-speed stirring and dispersing, continue stirring evenly, and then filter and pack. The protective coating provided by the invention has good physical and chemical properties such as alkali resistance, water resistance, weather resistance, adhesion, fire resistance and the like.

Description

technical field

[0001] The invention belongs to the technical field of concrete surface treatment, and in particular relates to a nanometer fire-resistant concrete protective coating and a preparation method thereof. Background technique

[0002] Cement concrete is a non-homogeneous material formed by cementing a mixture of coarse and fine aggregates and admixtures together with cement paste and hardening. It has been widely used in civil engineering. Due to the porous characteristics of concrete materials, carbon dioxide gas, water and water or other liquid-carrier media (such as chloride ions) in the surrounding environment can pass through the capillary pores in the concrete to reach the surface of the steel reinforcement during use. When the medium reaches a certain concentration, it will induce corrosion of steel bars, and the volume expansion of the corrosion products will cause concrete cracking and damage, damage the building structure, and even make it lose its use ...

Examples

Embodiment 1

[0031] Provide a kind of nanometer flame-resistant concrete protective coating, including the following components by weight: 55 parts of modified nano-silica sol emulsion, 10 parts of attapulgite whiskers, 5 parts of Schiff base modified graphene composite, wetting and dispersing agent Digao 2450.2 parts, thickener sodium carboxymethyl cellulose 0.2 part, defoamer mineral oil silicon-based mixture 0.5 part, leveling agent BYK37203 parts, deionized water 35 parts.

[0032] The preparation process of the above-mentioned modified nano-silica sol emulsion comprises the following steps:

[0033] Slowly add 3-methacryloyloxypropyltrimethoxysilane modifier, appropriate amount of surfactant and water to the nano-silica sol under stirring, wherein 3-methacryloyloxypropyltrimethoxysilane The amount of silane modifier added is 1.5 wt% of the nano-silica sol. After adding, continue stirring for more than 10 hours until a milky white and translucent low-viscosity emulsion is obtained, whi...

Embodiment 2

[0042] An inorganic weather-resistant concrete protective coating is provided, comprising the following components by weight: 62 parts of modified nano-silica sol emulsion, 9 parts of attapulgite whiskers, 4 parts of Schiff base modified graphene composite, wetting and dispersing agent Digao 2450.3 parts, thickener hydroxyethyl cellulose 0.3 part, defoamer aliphatic hydrocarbon emulsion 0.4 part, leveling agent BYK37202 part, deionized water 32 parts.

[0043] The preparation process of the above-mentioned modified nano-silica sol emulsion comprises the following steps:

[0044] Slowly add 3-methacryloyloxypropyltrimethoxysilane modifier, appropriate amount of surfactant and water to the nano-silica sol under stirring, wherein 3-methacryloyloxypropyltrimethoxysilane The amount of the silane modifier added is 1.6 wt% of the nano-silica sol. After the addition, the stirring is continued for more than 10 hours until a milky white and translucent low-viscosity emulsion is obtained...

Embodiment 3

[0053] An inorganic weather-resistant concrete protective coating is provided, comprising the following components in parts by weight: 68 parts of modified nano-silica sol emulsion, 9 parts of attapulgite whiskers, 4 parts of Schiff base modified graphene composite, wetting and dispersing agent Digao 2450.4 parts, thickener polyvinylpyrrolidone 0.4 part, defoamer polyether organic compound 0.4 part, leveling agent BYK37202 part, deionized water 28 part.

[0054] The preparation process of the above-mentioned modified nano-silica sol emulsion comprises the following steps:

[0055] Slowly add 3-methacryloyloxypropyltrimethoxysilane modifier, appropriate amount of surfactant and water to the nano-silica sol under stirring, wherein 3-methacryloyloxypropyltrimethoxysilane The addition amount of the silane modifier is 1.7 wt% of the nano-silica sol. After the addition, the stirring is continued for more than 10 hours until a milky white and translucent low-viscosity emulsion is obt...

technical field

[0001] The invention belongs to the technical field of concrete surface treatment, and in particular relates to a nanometer fire-resistant concrete protective coating and a preparation method thereof. Background technique

[0002] Cement concrete is a non-homogeneous material formed by cementing a mixture of coarse and fine aggregates and admixtures together with cement paste and hardening. It has been widely used in civil engineering. Due to the porous characteristics of concrete materials, carbon dioxide gas, water and water or other liquid-carrier media (such as chloride ions) in the surrounding environment can pass through the capillary pores in the concrete to reach the surface of the steel reinforcement during use. When the medium reaches a certain concentration, it will induce corrosion of steel bars, and the volume expansion of the corrosion products will cause concrete cracking and damage, damage the building structure, and even make it lose its use ...

Examples

Embodiment 1

[0031] Provide a kind of nanometer flame-resistant concrete protective coating, including the following components by weight: 55 parts of modified nano-silica sol emulsion, 10 parts of attapulgite whiskers, 5 parts of Schiff base modified graphene composite, wetting and dispersing agent Digao 2450.2 parts, thickener sodium carboxymethyl cellulose 0.2 part, defoamer mineral oil silicon-based mixture 0.5 part, leveling agent BYK37203 parts, deionized water 35 parts.

[0032] The preparation process of the above-mentioned modified nano-silica sol emulsion comprises the following steps:

[0033] Slowly add 3-methacryloyloxypropyltrimethoxysilane modifier, appropriate amount of surfactant and water to the nano-silica sol under stirring, wherein 3-methacryloyloxypropyltrimethoxysilane The amount of silane modifier added is 1.5 wt% of the nano-silica sol. After adding, continue stirring for more than 10 hours until a milky white and translucent low-viscosity emulsion is obtained, whi...

Embodiment 2

[0042] An inorganic weather-resistant concrete protective coating is provided, comprising the following components by weight: 62 parts of modified nano-silica sol emulsion, 9 parts of attapulgite whiskers, 4 parts of Schiff base modified graphene composite, wetting and dispersing agent Digao 2450.3 parts, thickener hydroxyethyl cellulose 0.3 part, defoamer aliphatic hydrocarbon emulsion 0.4 part, leveling agent BYK37202 part, deionized water 32 parts.

[0043] The preparation process of the above-mentioned modified nano-silica sol emulsion comprises the following steps:

[0044] Slowly add 3-methacryloyloxypropyltrimethoxysilane modifier, appropriate amount of surfactant and water to the nano-silica sol under stirring, wherein 3-methacryloyloxypropyltrimethoxysilane The amount of the silane modifier added is 1.6 wt% of the nano-silica sol. After the addition, the stirring is continued for more than 10 hours until a milky white and translucent low-viscosity emulsion is obtained...

Embodiment 3

[0053] An inorganic weather-resistant concrete protective coating is provided, comprising the following components in parts by weight: 68 parts of modified nano-silica sol emulsion, 9 parts of attapulgite whiskers, 4 parts of Schiff base modified graphene composite, wetting and dispersing agent Digao 2450.4 parts, thickener polyvinylpyrrolidone 0.4 part, defoamer polyether organic compound 0.4 part, leveling agent BYK37202 part, deionized water 28 part.

[0054] The preparation process of the above-mentioned modified nano-silica sol emulsion comprises the following steps:

[0055] Slowly add 3-methacryloyloxypropyltrimethoxysilane modifier, appropriate amount of surfactant and water to the nano-silica sol under stirring, wherein 3-methacryloyloxypropyltrimethoxysilane The addition amount of the silane modifier is 1.7 wt% of the nano-silica sol. After the addition, the stirring is continued for more than 10 hours until a milky white and translucent low-viscosity emulsion is obt...

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