Interlayer floor self-leveling heat preservation and sound insulation material and preparation method thereof

Abstract

The invention discloses a self-leveling heat-preservation and sound-insulation material for an interlayer floor slab. The sound-insulation and heat-preservation gypsum board is prepared from the following components in parts by mass: 40 to 50 parts of desulfurized gypsum powder, 35 to 60 parts of cement, 10 to 15 parts of nano aerogel, 10 to 18 parts of sound-insulation filler, 4 to 7 parts of silicon powder, 1 to 5 parts of polypropylene fiber, 5 to 10 parts of calcium bentonite, 30 to 60 parts of water, 2 to 8 parts of modified expanded perlite, 2 to 5 parts of compound additive, 2 to 4 parts of retarder, 3 to 11 parts of water reducing agent and 3 to 10 parts of flame-retardant smoke suppressor, the heat-preservation sound-insulation building material has good heat-preservation and sound-insulation effects

Description

Technical Field

[0001] The invention relates to the technical field of building materials, in particular to a self-leveling heat-insulating and sound-insulating material for interlayer floors and a preparation method thereof. Background Art

[0002] Self-leveling thermal insulation floor materials have the advantages of good fluidity, simple construction, low labor intensity, etc., and have certain thermal insulation properties. They are ideal building insulation materials for floor paving in large supermarkets, shopping malls, factory workshops, parking lots, warehouses, etc., and have huge market potential. The self-leveling thermal insulation materials currently produced domestically have poor construction properties, are prone to fine cracks, and lead to water seepage; at the same time, the thermal insulation, sound insulation and fire prevention effects are not good. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a self-leveling thermal insulation and sound insulation material for interlayer floors and a preparation method thereof in view of the shortcomings of the above prior art.

[0004] The technical solution of the present invention to solve the above technical problems is: a self-leveling thermal insulation and sound insulation material for interlayer floors, which comprises the following components by mass: desulfurized gypsum powder: 40-50 parts, cement: 35-60 parts, nano aerogel: 10-15 parts, sound insulation filler: 10-18 parts, silicon powder: 4-7 parts, polypropylene fiber: 1-5 parts, calcium-based bentonite: 5-10 parts, water: 30-60 parts, modified expanded perlite: 2-8 parts, composite additive: 2-5 parts, retarder: 2-4 parts, water reducer: 3-11 parts, flame retardant and smoke suppressant: 3-10 parts.

[0005] The technical solution further defined in the present invention is: Preferably, the sound insulation filler includes at least one of nitrile rubber powder, barite powder, acrylonitrile foam microbeads, and polyvinylidene chloride foam microbeads.

[0006] Preferably, the particle size of the polyvinylidene chloride foamed microbeads is 2.3-4.3 mm, and the bulk density is about 12-14 kg / m3.

[0007] Preferably, the retarder is sodium pyrophosphate, and the water reducer is a polycarboxylic acid high performance water reducer.

[0008] Preferably, the composite auxiliary agent comprises, by weight: 15-20 parts of glass hollow microspheres, 3-7 parts of aluminum sulfate powder, 5-9 parts of styrene acrylic emulsion, and 2-5 parts of hydroxyethyl cellulose.

[0009] Preferably, the particle size of the vitrified microspheres is 70-100 mesh, the bulk density is 145-150 kg / m3, the thermal conductivity is 0.06-0.07 W / (m·K), and the volume water absorption is 24-26%.

[0010] Preferably, the flame retardant and smoke suppressant is a mixture of one or more of zinc borate, antimony trioxide or aluminum hydroxide.

[0011] Preferably, the aerogel has a density of 0.5-1.0 g / cm3; the porosity of the aerogel three-dimensional nanoporous structure is greater than 85%, and the thermal conductivity is less than 0.018 W / m·k.

[0012] The present invention provides a method for preparing a self-leveling thermal insulation and sound insulation material for an interlayer floor, which specifically comprises the following steps: (1) mixing desulfurized gypsum powder, cement, calcium-based bentonite and modified expanded perlite and stirring evenly, then adding nano aerogel and sound insulation filler and stirring evenly to obtain a mixed material A; (2) mixing the water reducing agent, the retarder, the composite auxiliary agent, the flame retardant and the smoke suppressant with half of the total water consumption and stirring them evenly to obtain a mixed solution B; (3) Mixing the mixed material A, the mixed solution B and the remaining water and stirring them uniformly to obtain slurry C; (4) Continue to add silicon powder and polypropylene fiber to slurry C, first slowly stir at 40-50 r / min for 3-5 min, and then quickly stir and mix at 100-120 r / min for 5-8 min to obtain a self-leveling thermal insulation and sound insulation material for interlayer floor slabs.

[0013] The beneficial effects of the present invention are: The desulfurized gypsum powder and nano-aerogel of the present invention are combined, and other materials are added to form a composite gelling material, which can fill the pores between the material particles and is conducive to improving the mechanical properties of the material. The desulfurized gypsum has the advantages of low cost, renewability and environmental protection. The present invention adds a composite auxiliary agent, wherein the vitrified hollow microspheres have excellent thermal insulation performance, and the thermal insulation performance of the material can be greatly improved after being added. The aluminum sulfate powder can compensate for the plastic shrinkage caused by the early construction of the material and reduce the possibility of cracking of the structure due to shrinkage; after the styrene-acrylic emulsion and the silicon powder are added to the cement, the linear expansion coefficient and the shrinkage rate of the solidified material can be reduced, thereby eliminating the internal stress of the solidified material and preventing cracking; and the product surface has a strong corrosion resistance; through the damping effect of the high molecular sound insulation functional filler of the organic sound insulation filler, good sound insulation performance is obtained, and the sound pressure level of the impact sound is reduced to 50-55dB, thereby leaving more sound insulation performance margin for the construction of the decorative surface layer, and improving the sound insulation experience after completion; The polypropylene fiber of the present invention is added to the mortar formed by the material to effectively control the micro cracks caused by factors such as the solid-plastic shrinkage, drying shrinkage, temperature change and the like of the mortar, prevent and inhibit the formation and development of cracks, and greatly improve the crack resistance and anti-seepage performance, impact resistance and earthquake resistance of the concrete; at the same time, the polypropylene fiber and the hollow glass microspheres can enhance the thermal insulation effect of the material through the cooperation of the two. DETAILED DESCRIPTION Example 1

[0014] The present embodiment provides a self-leveling thermal insulation and sound insulation material for interlayer floors, which includes the following components by mass: desulfurized gypsum powder: 40 parts, cement: 35 parts, nano aerogel: 10 parts, sound insulation filler: 10 parts, silicon powder: 4 parts, polypropylene fiber: 3 parts, calcium-based bentonite: 5 parts, water: 30 parts, modified expanded perlite: 4 parts, composite additive: 3 parts, retarder: 2 parts, water reducer: 3 parts, flame retardant and smoke suppressant: 3 parts; The density of the aerogel is 0.5g / cm3; the porosity of the aerogel three-dimensional nanoporous structure is greater than 85%, and the thermal conductivity is less than 0.018W / m·k. The sound insulation filler includes nitrile rubber powder and polyvinylidene chloride foamed microspheres. The particle size of the polyvinylidene chloride foamed microspheres is 2.3mm, and the bulk density is about 12kg / m3; the retarder is sodium pyrophosphate, and the water reducer is a polycarboxylic acid high-performance water reducer; the composite additives include, by mass, 15 parts of glass hollow microspheres, 3 parts of aluminum sulfate powder, 5 parts of styrene acrylic emulsion, and 2 parts of hydroxyethyl cellulose. The particle size of the glass microspheres is 70 mesh, the bulk density is 145kg / m3, the thermal conductivity is 0.06W / (m·K), the volume water absorption is 24-26%, and the flame retardant and smoke suppressant is zinc borate.

[0015] The present invention also provides a method for preparing a self-leveling thermal insulation and sound insulation material for an interlayer floor, which specifically comprises the following steps: (1) mixing desulfurized gypsum powder, cement, calcium-based bentonite and modified expanded perlite and stirring evenly, then adding nano aerogel and sound insulation filler and stirring evenly to obtain a mixed material A; (2) mixing the water reducing agent, the retarder, the composite auxiliary agent, the flame retardant and the smoke suppressant with half of the total water consumption and stirring them evenly to obtain a mixed solution B; (3) Mixing the mixed material A, the mixed solution B and the remaining water and stirring them uniformly to obtain slurry C; (4) Silica powder and polypropylene fiber were added to slurry C, and the mixture was first slowly stirred at 40 r / min for 5 min, and then rapidly stirred and mixed at 100 r / min for 8 min to obtain a self-leveling thermal insulation and sound insulation material for interlayer slabs.

[0016] The test was carried out in accordance with GB / T 19889.6-2005 "Acoustic Sound Insulation Measurement of Buildings and Building Elements Part 6: Laboratory Measurement of Floor Impact Sound Insulation", and the weighted normalized impact sound pressure level of 5mm sound insulation coating was evaluated as 54dB (improvement of 26dB) in accordance with GB50121-2005 "Building Sound Insulation Evaluation Standard". Example 2

[0017] The present embodiment provides a self-leveling thermal insulation and sound insulation material for interlayer floors, which includes the following components by mass: desulfurized gypsum powder: 45 parts, cement: 50 parts, nano aerogel: 13 parts, sound insulation filler: 15 parts, silicon powder: 6 parts, polypropylene fiber: 3 parts, calcium-based bentonite: 8 parts, water: 48 parts, modified expanded perlite: 5 parts, composite additive: 4 parts, retarder: 3 parts, water reducer: 6 parts, flame retardant and smoke suppressant: 5 parts; The density of the aerogel is 0.5g / cm3; the porosity of the aerogel three-dimensional nanoporous structure is greater than 85%, and the thermal conductivity is less than 0.018W / m·k. The sound insulation filler includes barite powder and polyvinylidene chloride foamed microspheres. The particle size of the polyvinylidene chloride foamed microspheres is 2.6mm and the bulk density is about 12kg / m3; the retarder is sodium pyrophosphate, and the water reducer is a polycarboxylic acid high-performance water reducer; the composite additives include, by mass, 18 parts of glass hollow microspheres, 6 parts of aluminum sulfate powder, 7 parts of styrene acrylic emulsion, and 4 parts of hydroxyethyl cellulose. The particle size of the glass microspheres is 90 mesh, the bulk density is 148kg / m3, the thermal conductivity is 0.07W / (m·K), the volume water absorption is 24-26%, and the flame retardant and smoke suppressant is antimony trioxide.

[0018] The present invention also provides a method for preparing a self-leveling thermal insulation and sound insulation material for interlayer floors, which specifically comprises the following steps: (1) mixing desulfurized gypsum powder, cement, calcium-based bentonite and modified expanded perlite and stirring evenly, then adding nano aerogel and sound insulation filler and stirring evenly to obtain a mixed material A; (2) mixing the water reducing agent, the retarder, the composite auxiliary agent, the flame retardant and the smoke suppressant with half of the total water consumption and stirring them evenly to obtain a mixed solution B; (3) Mixing the mixed material A, the mixed solution B and the remaining water and stirring them uniformly to obtain slurry C; (4) Silica powder and polypropylene fiber were further added to slurry C, and the mixture was first slowly stirred at 45 r / min for 4 min, and then rapidly stirred and mixed at 110 r / min for 6 min to obtain a self-leveling thermal insulation and sound insulation material for interlayer slabs. Example 3

[0019] The present embodiment provides a self-leveling thermal insulation and sound insulation material for interlayer floors, which includes the following components by mass: desulfurized gypsum powder: 50 parts, cement: 60 parts, nano aerogel: 15 parts, sound insulation filler: 18 parts, silicon powder: 7 parts, polypropylene fiber: 5 parts, calcium-based bentonite: 10 parts, water: 60 parts, modified expanded perlite: 8 parts, composite additive: 5 parts, retarder: 4 parts, water reducer: 10 parts, flame retardant smoke suppressant: 8 parts; The aerogel has a density of 0.5 g / cm3; the porosity of the aerogel three-dimensional nanoporous structure is greater than 85%, and the thermal conductivity is less than 0.018 W / m·k. The sound insulation filler includes nitrile rubber powder, barite powder and acrylonitrile foamed microspheres; the retarder is sodium pyrophosphate, and the water reducer is a polycarboxylic acid high-performance water reducer; the composite additives include, by weight, 20 parts of vitrified hollow microspheres, 7 parts of aluminum sulfate powder, 9 parts of styrene acrylic emulsion, and 5 parts of hydroxyethyl cellulose; the particle size of the vitrified microspheres is 100 mesh, the bulk density is 145 kg / m3, the thermal conductivity is 0.06 W / (m·K), and the volume water absorption is 24-26%; the flame retardant and smoke suppressant is a mixture of zinc borate and aluminum hydroxide.

[0020] The present invention provides a method for preparing a self-leveling thermal insulation and sound insulation material for an interlayer floor, which specifically comprises the following steps: (1) mixing desulfurized gypsum powder, cement, calcium-based bentonite and modified expanded perlite and stirring evenly, then adding nano aerogel and sound insulation filler and stirring evenly to obtain a mixed material A; (2) mixing the water reducing agent, the retarder, the composite auxiliary agent, the flame retardant and the smoke suppressant with half of the total water consumption and stirring them evenly to obtain a mixed solution B; (3) Mixing the mixed material A, the mixed solution B and the remaining water and stirring them uniformly to obtain slurry C; (4) Silica powder and polypropylene fiber were added to slurry C, and the mixture was first slowly stirred at 50 r / min for 3 min, and then rapidly stirred and mixed at 120 r / min for 5 min to obtain a self-leveling thermal insulation and sound insulation material for interlayer slabs.

[0021] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A self-leveling thermal insulation and sound insulation material for interlayer floors, characterized in that: The following components are included by mass: desulfurized gypsum powder: 40-50 parts, cement: 35-60 parts, nano aerogel: 10-15 parts, sound insulation filler: 10-18 parts, silica powder: 4-7 parts, polypropylene fiber: 1-5 parts, calcium-based bentonite: 5-10 parts, water: 30-60 parts, modified expanded perlite: 2-8 parts, composite additive: 2-5 parts, retarder: 2-4 parts, water reducer: 3-11 parts, flame retardant and smoke suppressant: 3-10 parts.

2. The interlayer floor self-leveling thermal insulation and sound insulation material according to claim 1, characterized in that: The sound insulation filler includes at least one of nitrile rubber powder, barite powder, acrylonitrile foamed microbeads, and polyvinylidene chloride foamed microbeads.

3. The interlayer floor self-leveling thermal insulation and sound insulation material according to claim 2, characterized in that: The particle size of polyvinylidene chloride foam microbeads is 2.3 - 4.3mm, and the bulk density is about 12 - 14kg / m3.

4. The interlayer floor self-leveling thermal insulation and sound insulation material according to claim 1, characterized in that: The retarder is sodium pyrophosphate, and the water reducer is a polycarboxylic acid high performance water reducer.

5. The interlayer floor self-leveling thermal insulation and sound insulation material according to claim 1, characterized in that: The composite auxiliary agent comprises, by weight, 15 to 20 parts of glass hollow microspheres, 3 to 7 parts of aluminum sulfate powder, 5 to 9 parts of styrene acrylic emulsion, and 2 to 5 parts of hydroxyethyl cellulose.

6. The interlayer floor self-leveling thermal insulation and sound insulation material according to claim 5, characterized in that: The particle size of the vitrified microspheres is 70-100 meshes, the bulk density is 145-150 kg / m3, the thermal conductivity is 0.06-0.07 W / (m·K), and the volume water absorption is 24-26%.

7. The interlayer floor self-leveling thermal insulation and sound insulation material according to claim 1, characterized in that: The flame retardant and smoke suppressant is a mixture of one or more of zinc borate, antimony trioxide or aluminum hydroxide.

8. The interlayer floor self-leveling thermal insulation and sound insulation material according to claim 1, characterized in that: The density of the aerogel is 0.5-1.0g / cm3; the porosity of the aerogel three-dimensional nanoporous structure is greater than 85%, and the thermal conductivity is less than 0.018W / m·k.

9. A method for preparing a self-leveling thermal insulation and sound insulation material for interlayer slabs according to any one of claims 1 to 8, characterized in that: The specific steps include: (1) mixing desulfurized gypsum powder, cement, calcium-based bentonite and modified expanded perlite and stirring evenly, then adding nano aerogel and sound insulation filler and stirring evenly to obtain a mixed material A; (2) mixing the water reducing agent, the retarder, the composite auxiliary agent, the flame retardant and the smoke suppressant with half of the total water consumption and stirring them evenly to obtain a mixed solution B; (3) Mixing the mixed material A, the mixed solution B and the remaining water and stirring them uniformly to obtain slurry C; (4) Continue to add silicon powder and polypropylene fiber to slurry C, first slowly stir at 40-50 r / min for 3-5 min, and then quickly stir and mix at 100-120 r / min for 5-8 min to obtain interlayer floor self-leveling insulation and sound insulation material.