CN115594468B - Environment-friendly fireproof insulation board and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of building materials, and proposes an environment-friendly fireproof insulation board and a preparation method thereof, comprising the following components in parts by weight: Portland cement 140-180 parts, fly ash 40-90 parts, sodium carboxymethyl cellulose 0.25‑0.7 parts, 25‑30 parts of glass fiber, 3‑5 parts of bentonite, 8‑10 parts of quartz sand, 2‑4 parts of polyacrylamide, 2‑3 parts of waste gypsum, tetramethylguanidinopropyltrimethoxy 4-6 parts of silane, 0.5-1.5 parts of water reducing agent, 8-10 parts of foaming agent, 3.5-4.5 parts of flame retardant, 80-100 parts of water. Through the above technical solution, the problem of low strength of the foam concrete fireproof and heat preservation board in the prior art is solved.

Description

Environment-friendly fireproof insulation board and preparation method thereof

technical field

The invention relates to the technical field of building materials, in particular to an environment-friendly fireproof insulation board and a preparation method thereof.

Background technique

With the rapid development of the national economy, the thermal insulation system of building exterior walls has increasingly become an important part of residential projects. The construction industry has higher and higher requirements for thermal insulation panels. At present, there are many types of thermal insulation materials for building exterior walls on the market. , and then the problem of insufficient fire performance always exists. Once a fire breaks out in a building, the insulation material will become a combustion aid for the fire, and the fire will intensify, causing huge economic losses and seriously threatening the safety of residents' lives and properties. Therefore, the requirements for the fire performance of external thermal insulation materials for building exterior walls are getting higher and higher.

The fireproof performance of the foam concrete fireproof insulation board is good, but because the foam concrete fireproof insulation board contains a large number of sealed foam holes inside, there is a disadvantage of low strength. Therefore, it is necessary to improve the strength of the foam concrete fireproof insulation board.

Contents of the invention

The invention proposes an environment-friendly fireproof heat preservation board and a preparation method thereof, which solves the problem of low strength of the foam concrete fireproof heat preservation board in the related art.

Technical scheme of the present invention is as follows:

An environment-friendly fireproof insulation board, comprising the following components in parts by weight: 140-180 parts of Portland cement, 40-90 parts of fly ash, 0.25-0.7 parts of sodium carboxymethyl cellulose, 25-30 parts of glass fiber, 3-5 parts of bentonite, 8-10 parts of quartz sand, 2-4 parts of polyacrylamide, 2-3 parts of waste gypsum, 4-6 parts of tetramethylguanidinopropyltrimethoxysilane, 0.5-1.5 parts of water reducer parts, foaming agent 8-10 parts, flame retardant 3.5-4.5 parts, water 80-100 parts.

As a further technical solution, the particle size of the quartz sand is 80-120 mesh.

As a further technical solution, the water reducer is one or more of polycarboxylate water reducer and naphthalene water reducer.

As a further technical solution, the foaming agent is hydrogen peroxide.

As a further technical solution, the flame retardant is one or more of decabromodiphenylethane and antimony trioxide.

A preparation method of an environment-friendly fireproof insulation board, comprising the following steps:

S1. Weigh each component of the environment-friendly fireproof insulation board and set aside;

S2. Dissolving one-fifth of the mass of polyacrylamide in water, adding tetramethylguanidinopropyltrimethoxysilane and mixing evenly to obtain a mixed solution;

S3, adding glass fibers to the mixed solution, stirring at 60° C. for 3 hours, and drying to obtain modified glass fibers;

S4, mixing the modified glass fiber with other components except the blowing agent to obtain a mixed material;

S5, adding a foaming agent to the mixed material, stirring for 3-5s, to obtain a slurry;

S6. The slurry is placed in the formwork, and after pouring, demoulding and curing, a fireproof insulation board is obtained.

As a further technical solution, the mass ratio of the glass fiber to the mixed solution in S3 is 1:10.

As a further technical solution, the curing time in S6 is 7-10d.

As a further technical solution, the demoulding in S6 is 5-6 hours after pouring is completed.

Working principle of the present invention and beneficial effect are:

1. The fireproof and thermal insulation board prepared by the present invention has good thermal insulation performance and high compressive strength. The thermal conductivity of the fireproof and thermal insulation board is 0.035-0.046 w/(m·K), and the compressive strength is 0.76-0.84 MPa.

2. The present invention adds polyacrylamide to the components, and a part of polyacrylamide and tetramethylguanidinopropyltrimethoxysilane are used for modification of glass fibers. In the prepared modified glass fibers, four Methylguanidinopropyltrimethoxysilane increases the number of hydroxyl groups on the surface of glass fibers, and the hydrogen ions on the amide groups in polyacrylamide can form hydrogen bonds with the hydroxyl groups on glass fibers, increasing the connectivity between glass fibers, and at the same time , which improves the compatibility between the glass fiber and the base material of the fireproof insulation board, so that the modified glass fiber is added to the fireproof insulation board, which greatly improves the mechanical strength of the insulation board; another part of polyacrylamide is The insulation board plays the role of stabilizing the foam and preventing collapse, which can improve the stability of the foam, prevent the foam from collapsing and cause the foam to be uneven, and thus improve the insulation performance of the insulation board.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all involve the protection scope of the present invention.

In the following examples and comparative examples, SSF-1000 naphthalene-based water reducer was purchased from Hubei Shanshufeng Building Material Technology Co., Ltd., and ST-02A polycarboxylic acid-based high-performance water reducer was purchased from Hebei Shengtong Building Material Technology Co., Ltd.

Example 1

A preparation method of an environment-friendly fireproof insulation board, comprising the following steps:

S1. Weigh 140 parts of Portland cement, 40 parts of fly ash, 0.25 parts of sodium carboxymethyl cellulose, 25 parts of glass fiber, 3 parts of bentonite, 8 parts of quartz sand, 2 parts of polyacrylamide, and 2 parts of waste gypsum , 4 parts of tetramethylguanidinopropyltrimethoxysilane, 0.5 parts of ST-02A polycarboxylate high-performance water reducer, 8 parts of hydrogen peroxide, 3.5 parts of antimony trioxide, 80 parts of water, and set aside;

S2. Dissolving one-fifth of the mass of polyacrylamide in water, adding tetramethylguanidinopropyltrimethoxysilane and mixing evenly to obtain a mixed solution;

S3. Add glass fibers to the mixed solution, stir at 60°C for 3 hours, and dry to obtain modified glass fibers; wherein the mass ratio of glass fibers to the mixed solution is 1:10;

S4, mixing the modified glass fiber with other components except hydrogen peroxide to obtain a mixed material;

S5, adding hydrogen peroxide to the mixed material, stirring for 3s to obtain a slurry;

S6. Put the slurry in the formwork, remove the mold 5 hours after pouring, and cure for 10 days to prepare a fireproof insulation board.

Example 2

A preparation method of an environment-friendly fireproof insulation board, comprising the following steps:

S1. Weigh 180 parts of Portland cement, 90 parts of fly ash, 0.7 parts of sodium carboxymethyl cellulose, 28 parts of glass fiber, 5 parts of bentonite, 10 parts of quartz sand, 4 parts of polyacrylamide, and 3 parts of waste gypsum , 6 parts of tetramethylguanidinopropyltrimethoxysilane, 1.5 parts of ST-02A polycarboxylate high-performance water reducer, 10 parts of hydrogen peroxide, 4.5 parts of antimony trioxide, 100 parts of water, for later use;

S2. Dissolving one-fifth of the mass of polyacrylamide in water, adding tetramethylguanidinopropyltrimethoxysilane and mixing evenly to obtain a mixed solution;

S3. Add glass fibers to the mixed solution, stir at 60°C for 3 hours, and dry to obtain modified glass fibers; wherein the mass ratio of glass fibers to the mixed solution is 1:10;

S4, mixing the modified glass fiber with other components except hydrogen peroxide to obtain a mixed material;

S5, adding hydrogen peroxide to the mixed material, stirring for 4s to obtain a slurry;

S6. Put the slurry in the formwork, remove the mold 5 hours after pouring, and cure for 10 days to prepare a fireproof insulation board.

Example 3

A preparation method of an environment-friendly fireproof insulation board, comprising the following steps:

S1. Weigh 160 parts of Portland cement, 70 parts of fly ash, 0.6 parts of sodium carboxymethylcellulose, 30 parts of glass fiber, 4 parts of bentonite, 9 parts of quartz sand, 3 parts of polyacrylamide, and 2.5 parts of waste gypsum , 5 parts of tetramethylguanidinopropyltrimethoxysilane, 1 part of ST-02A polycarboxylate high-performance water reducer, 9 parts of hydrogen peroxide, 4 parts of antimony trioxide, 85 parts of water, for later use;

S2. Dissolving one-fifth of the mass of polyacrylamide in water, adding tetramethylguanidinopropyltrimethoxysilane and mixing evenly to obtain a mixed solution;

S3. Add glass fibers to the mixed solution, stir at 60°C for 3 hours, and dry to obtain modified glass fibers; wherein the mass ratio of glass fibers to the mixed solution is 1:10;

S4, mixing the modified glass fiber with other components except hydrogen peroxide to obtain a mixed material;

S5, adding hydrogen peroxide to the mixed material, stirring for 5s, to obtain a slurry;

S6. Put the slurry in the formwork, remove the mold 5 hours after pouring, and cure for 10 days to prepare a fireproof insulation board.

Example 4

A preparation method of an environment-friendly fireproof insulation board, comprising the following steps:

S1. Weigh 160 parts of Portland cement, 80 parts of fly ash, 0.65 parts of sodium carboxymethyl cellulose, 29 parts of glass fiber, 5 parts of bentonite, 10 parts of quartz sand, 3 parts of polyacrylamide, and 3 parts of waste gypsum , 5 parts of tetramethylguanidinopropyltrimethoxysilane, 1 part of SSF-1000 naphthalene-based water reducer, 8 parts of hydrogen peroxide, 4 parts of antimony trioxide, 90 parts of water, for later use;

S2. Dissolving one-fifth of the mass of polyacrylamide in water, adding tetramethylguanidinopropyltrimethoxysilane and mixing evenly to obtain a mixed solution;

S3. Add glass fibers to the mixed solution, stir at 60°C for 3 hours, and dry to obtain modified glass fibers; wherein the mass ratio of glass fibers to the mixed solution is 1:10;

S4, mixing the modified glass fiber with other components except hydrogen peroxide to obtain a mixed material;

S5, adding hydrogen peroxide to the mixed material, stirring for 3s to obtain a slurry;

S6. Put the slurry in the formwork, remove the mold 5 hours after pouring, and cure for 10 days to prepare a fireproof insulation board.

Comparative example 1

Compared with Example 1, Comparative Example 1 does not add tetramethylguanidinopropyltrimethoxysilane, and the others are the same as Example 1.

Comparative example 2

Compared with Example 1, Comparative Example 2 replaced tetramethylguanidinopropyltrimethoxysilane with an equivalent amount of KH-570, and the others were the same as Example 1.

Comparative example 3

A preparation method of an environment-friendly fireproof insulation board, comprising the following steps:

S1. Weigh 140 parts of Portland cement, 40 parts of fly ash, 0.25 parts of sodium carboxymethyl cellulose, 25 parts of glass fiber, 3 parts of bentonite, 8 parts of quartz sand, 2 parts of polyacrylamide, and 2 parts of waste gypsum , 4 parts of tetramethylguanidinopropyltrimethoxysilane, 0.5 parts of ST-02A polycarboxylate high-performance water reducer, 8 parts of hydrogen peroxide, 3.5 parts of antimony trioxide, 80 parts of water, and set aside;

S2, mixing all components to obtain a mixed material;

S3, adding hydrogen peroxide to the mixed material, stirring for 3s to obtain a slurry;

S4. Put the slurry in the formwork, remove the mold 5 hours after pouring, and cure for 10 days to prepare a fireproof insulation board.

Comparative example 4

Compared with Example 1, Comparative Example 4 replaced polyacrylamide with an equivalent amount of trisodium phosphate, and the others were the same as Example 1.

The thermal conductivity and compressive strength of the fireproof insulation boards prepared in Examples 1-4 and Comparative Examples 1-4 were measured.

Determination of thermal conductivity: refer to GB/T 10294-2008 "Determination of steady-state thermal resistance and related characteristics of thermal insulation materials - protective hot plate method"

Determination of compressive strength: refer to GB/T 5486-2008 "Test methods for inorganic rigid insulation products"

Table 1 Measurement results

Note: The standard requirements in the above table are JC/T 2200—2013 cement-based foam insulation board

Compared with Example 4, Comparative Example 1 does not add tetramethylguanidinopropyltrimethoxysilane, and Comparative Example 2 replaces tetramethylguanidinopropyltrimethoxysilane with an equivalent amount of KH-570, Comparative Example 3 Mix the components directly. As a result, the compressive strength of the fireproof insulation boards prepared in Comparative Examples 1-3 is lower than that of Example 1, indicating that tetramethylguanidinopropyltrimethoxysilane and At the same time, polyacrylamide can improve the compressive strength of the insulation board when modifying the glass fiber.

In Comparative Example 4, polyacrylamide was replaced with an equivalent amount of trisodium phosphate, and the compressive strength of the prepared fireproof insulation board was lower than that of Example 1, and the thermal conductivity was higher than that of Example 1, indicating that replacing polyacrylamide would make the insulation The compressive strength and thermal insulation properties of the board are reduced.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention within.

Claims (8)

1. An environment-friendly fireproof insulation board, characterized in that it comprises the following components in parts by weight: 140-180 parts of Portland cement, 40-90 parts of fly ash, 0.25-0.7 part of sodium carboxymethyl cellulose, glass 25-30 parts of fiber, 3-5 parts of bentonite, 8-10 parts of quartz sand, 2-4 parts of polyacrylamide, 2-3 parts of waste gypsum, 4-6 parts of tetramethylguanidinopropyltrimethoxysilane, 0.5-1.5 parts of water reducing agent, 8-10 parts of foaming agent, 3.5-4.5 parts of flame retardant, 80-100 parts of water; The preparation method of the environment-friendly fireproof insulation board comprises the following steps: S1. Weigh each component of the environment-friendly fireproof insulation board and set aside; S2. Dissolving one-fifth of the mass of polyacrylamide in water, adding tetramethylguanidinopropyltrimethoxysilane and mixing evenly to obtain a mixed solution; S3, adding glass fibers to the mixed solution, stirring at 60° C. for 3 hours, and drying to obtain modified glass fibers; S4, mixing the modified glass fiber with other components except the blowing agent to obtain a mixed material; S5, adding a foaming agent to the mixed material, stirring for 3-5s, to obtain a slurry; S6. The slurry is placed in the formwork, and after pouring, demoulding and curing, a fireproof insulation board is obtained. 2. An environment-friendly fireproof and thermal insulation board according to claim 1, characterized in that the particle size of the quartz sand is 80-120 mesh. 3. An environment-friendly fireproof insulation board according to claim 1, characterized in that the water reducer is one or more of polycarboxylate water reducer and naphthalene water reducer. 4. A kind of environment-friendly fireproof insulation board according to claim 1, characterized in that, the foaming agent is hydrogen peroxide. 5. An environment-friendly fireproof insulation board according to claim 1, characterized in that the flame retardant is one or more of decabromodiphenylethane and antimony trioxide. 6. A kind of environment-friendly fireproof insulation board according to claim 1, characterized in that, the mass ratio of glass fiber and mixed solution in S3 is 1:10. 7. An environment-friendly fireproof and thermal insulation board according to claim 1, characterized in that, the curing time in S6 is 7-10 days. 8. An environment-friendly fire-proof insulation board according to claim 1, characterized in that the demoulding in S6 is to demould 5-6 hours after pouring is completed.