Preparation method of high-strength anti-seepage heat-preservation sound-insulation cement-based mortar material

Abstract

The invention discloses a preparation method of a high-strength anti-seepage type heat-preservation sound-insulation cement-based mortar material, which comprises the following steps: (1) mixing rubber particles, vitrified micro bubbles, granulated blast-furnace slag powder, desulfurized gypsum powder, carbide slag powder and calcium silicate powder, adding water, uniformly stirring, then curing, crushing the obtained consolidated body after the curing is completed, and crushing the crushed consolidated body into powder for later use; the pretreated sound absorption material is obtained. And (2) mixing the pretreated sound absorption material with water to form a wet material, then placing the wet material in a closed reactor containing carbon dioxide gas for reaction, and after the reaction is completed, drying to remove moisture to obtain the modified sound absorption material. And (3) uniformly mixing Portland cement, sand, the modified sound absorption material, modified asbestos fiber, potassium magnesium phosphate cement, a water reducing agent and a defoaming agent serving as raw materials, adding mixing water, and uniformly stirring. The method provided by the invention not only effectively overcomes the problem of degradation of mechanical properties of the cement-based material caused by rubber particles, but also improves the waterproof performance of the cement-based material.

Description

Technical Field

[0001] This invention relates to the field of wall material preparation, specifically to a method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] With the increasing demands for residential quality in the construction industry, the sound insulation and thermal insulation performance of floor slabs have become one of the core indicators for measuring the quality of housing. Currently, the main sound insulation methods for floor slabs include sound insulation felt and floating floor slabs, but they generally have the following shortcomings: (1) High construction complexity: Floating floor slabs require the laying of multiple layers of buffer layers and concrete layers, which is cumbersome and complicated. (2) High requirements for construction precision: Sound insulation felt needs to be cut and spliced, which can easily lead to sound insulation failure at the joints. (3) Imbalance between cost and environmental protection: Some sound insulation materials rely on organic polymer compounds, which have excessive VOC content and high raw material costs.

[0004] Studies have found that adding sound-absorbing materials to cement-based materials is one of the effective ways to achieve thermal insulation and soundproofing. Covering the materials with soil on building walls can achieve good thermal insulation and soundproofing effects, and the construction is simpler than traditional sound insulation felts and floating floor slabs. Rubber granules are commonly used sound-absorbing and noise-reducing materials in cement-based materials, but floor slabs made from them generally suffer from insufficient interfacial bonding strength between the rubber granules and the cement-based materials, leading to deterioration of the material's mechanical properties and making it prone to quality problems such as cracking. Summary of the Invention

[0005] To address the aforementioned problems, this invention discloses a method for preparing a high-strength, waterproof, thermally insulating, and sound-insulating cement-based mortar material. This method not only effectively overcomes the problem of rubber particles causing deterioration of the mechanical properties of cement-based materials but also improves their waterproof performance. Specifically, the technical solution of this invention is as follows.

[0006] A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material includes the following steps: (1) Mix rubber particles, vitrified microspheres, granulated blast furnace slag powder, desulfurized gypsum powder, carbide slag powder and calcium silicate powder, add water and stir evenly, then cure, and after completion, crush the solidified body to obtain pretreated sound-absorbing material.

[0007] (2) The pretreated sound-absorbing material is mixed with water to form a wet material, and then the wet material is placed in a closed reactor containing carbon dioxide gas to react. After the reaction is completed, the water is dried to remove the moisture and the modified sound-absorbing material is obtained.

[0008] (3) After wetting the surface of the asbestos fiber with acid and letting it stand, saturated sodium stearate solution is added dropwise and heated to react. After completion, the fiber is separated to obtain modified asbestos fiber.

[0009] (4) Using silicate cement, sand, the modified sound-absorbing material, the modified asbestos fiber, potassium magnesium phosphate cement, water-reducing agent, and defoamer as raw materials, mix them evenly and then add mixing water to stir evenly to obtain the thermal insulation and sound insulation cement-based mortar material.

[0010] Further, in step (1), the proportions of each component are as follows: 100-130 parts by weight of rubber granules, 25-50 parts by weight of vitrified microspheres, 75-85 parts by weight of granulated blast furnace slag powder, 11-19 parts by weight of desulfurized gypsum powder, 2-5 parts by weight of calcium carbide slag powder, 13-17 parts by weight of silica-calcium stone powder, and 40-45 parts by weight of water.

[0011] Furthermore, in step (1), the particle size of the rubber particles and vitrified microspheres is 0.1~0.3mm.

[0012] Furthermore, in step (1), the curing time is 7 to 14 days, the curing temperature is 20±2℃, and the relative humidity is ≥95%.

[0013] Furthermore, in step (1), the particle size of the pretreated sound-absorbing material is 2~5mm.

[0014] Furthermore, in step (2), the moisture content of the wet material is 20-35%.

[0015] Furthermore, in step (2), the reaction time is 5 to 7 hours and the reaction temperature is set to 80 to 90°C.

[0016] Further, in step (3), the ratio of the acid solution to asbestos fiber is 1~2.5 mL: 1 g. Optionally, the acid solution includes at least one of sulfuric acid, nitric acid, etc. The concentration of the acid solution is 0.2~0.35 mol / L.

[0017] Furthermore, in step (3), the settling time is 4 to 6.5 hours.

[0018] Further, in step (3), the ratio of the sodium stearate saturated solution to the asbestos fiber is 10~20mL:1g.

[0019] Furthermore, in step (3), the heating reaction is carried out at a temperature of 50-60°C for 1-1.5 hours.

[0020] Further, in step (4), the proportions of each component in the raw materials are as follows: 100-115 parts by weight of silicate cement, 130-150 parts by weight of sand, 220-240 parts by weight of the modified sound-absorbing material, 18-23 parts by weight of the modified asbestos fiber, 3.2-4.5 parts by weight of potassium magnesium phosphate cement, 1.6-2 parts by weight of water-reducing agent, 0.6-0.75 parts by weight of defoamer, and 44-48 parts by weight of mixing water.

[0021] Further, in step (4), the water-reducing agent includes at least one of polycarboxylate water-reducing agent, naphthalene water-reducing agent, aliphatic water-reducing agent, lignin sulfonate water-reducing agent, etc.

[0022] Furthermore, in step (4), the defoamer includes at least one of polyether defoamer, silicone defoamer, etc.

[0023] Compared with the prior art, the present invention has at least the following beneficial technical effects: (1) This invention first prepares a pretreated sound-absorbing material using rubber particles, vitrified microspheres, granulated blast furnace slag powder, desulfurized gypsum powder, carbide slag powder, and calcium silicate powder as raw materials. Then, the cementitious products formed by the granulated blast furnace slag powder, desulfurized gypsum powder, and carbide slag powder bind the rubber particles and vitrified microspheres together. Because the cementitious products have good compatibility with the cement-based mortar matrix of this invention, the problem of strength degradation caused by poor compatibility between rubber particles and the cement-based mortar matrix can be effectively overcome. Simultaneously, this invention further improves the sound insulation and heat preservation effects of the cement-based mortar material by leveraging the synergistic effect of the damping effect of the rubber particles and the sound scattering effect of the vitrified microspheres, as well as their low thermal conductivity. Secondly, the pretreated sound-absorbing material of the present invention also binds calcium silicate, which is converted into calcium carbonate and active silica after reacting with carbon dioxide. It can further react with calcium hydroxide, the hydration product of the granulated blast furnace slag powder, to hydrate calcium silicate. This not only enhances the bonding force between the modified sound-absorbing material and the cement-based mortar matrix, but also improves the strength of the modified sound-absorbing material of the present application, thereby further improving the strength of the cement-based mortar material of the present invention.

[0024] (2) In this invention, the surface of asbestos fibers is first treated with acid and then reacted with saturated sodium stearate solution, thereby forming magnesium stearate on the surface of the asbestos fibers and simultaneously achieving surface roughening treatment. When this fiber is added to the cement-based mortar material of this invention, under the action of the potassium magnesium phosphate cement, the magnesium stearate on the fiber surface releases magnesium ions to participate in the hydration reaction of the potassium magnesium phosphate cement, thereby forming more cementitious products (MgK[PO4]·6H2O), which improves the bonding force between the fiber and the cement-based mortar material matrix. At the same time, the fiber after surface roughening is more firmly bonded to the cement-based mortar material matrix, thereby effectively improving the strengthening effect of the fiber on the strength of the cement-based mortar material of this invention. On the other hand, the stearic acid particles formed by the magnesium stearate under the action of potassium magnesium phosphate cement are distributed in the cement-based mortar material matrix, which can also improve its hydrophobicity, which is beneficial to improving the waterproof and seepage-resistant ability, making the cement-based mortar material of this invention more suitable for use as thermal insulation and sound insulation material for exterior walls. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings, wherein: Figure 1 The image shows a sample of the modified sound-absorbing material prepared in Example 1 below.

[0026] Figure 2 The image shows a modified asbestos fiber sample prepared in Example 1 below.

[0027] Figure 3 The image shows a sample of the modified sound-absorbing material prepared in Example 2 below.

[0028] Figure 4 The image shows a modified asbestos fiber sample prepared in Example 2 below.

[0029] Figure 5 The image shows a sample of the modified sound-absorbing material prepared in Example 3 below.

[0030] Figure 6 The image shows a modified asbestos fiber sample prepared in Example 3 below.

[0031] Figure 7 The image shows a sample of the modified sound-absorbing material prepared in Example 5 below.

[0032] Figure 8 The image shows a modified asbestos fiber sample prepared in Example 7 below. Detailed Implementation

[0033] The present invention is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Experimental methods in the following embodiments, unless otherwise specified, are generally performed under conventional conditions or as recommended by the manufacturer.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of skill in the art. The reagents or raw materials used in this invention are readily available through conventional means, and unless otherwise specified, they are used in accordance with conventional methods or product instructions. Furthermore, any methods and materials similar to or equivalent to those described herein may be applied to the methods of this invention. The technical solution of this invention will now be further described in conjunction with specific embodiments.

[0035] Example 1: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: (1) Take the following raw materials in the following proportions: 113 parts by weight of rubber granules, 40 parts by weight of vitrified microspheres, 80 parts by weight of granulated blast furnace slag powder, 15 parts by weight of desulfurized gypsum powder, 3.5 parts by weight of calcium carbide slag powder, 14 parts by weight of calcium silicate powder, and 42 parts by weight of water. The particle size of the rubber granules and vitrified microspheres is distributed between 0.1 and 0.3 mm.

[0036] (2) First, add the rubber particles, vitrified microspheres, granulated blast furnace slag powder, desulfurized gypsum powder, carbide slag powder, and calcium silicate powder to a mixer and stir for 5 minutes. Then, add the water and continue stirring for 2 minutes. Pour the resulting slurry into a mold for curing (for 10 days, at a temperature of 20±2℃ and a relative humidity of ≥95%). After completion, crush the resulting solidified body and sieve it. Use the particles with a particle size distribution between 2 and 5 mm as pre-treated sound-absorbing materials for later use.

[0037] (3) The pretreated sound-absorbing material is mixed with water to form a wet material with a moisture content of 28%. This wet material is then placed in a reactor, sealed, and filled with sufficient carbon dioxide gas for a reaction time of 6 hours at a temperature of 85°C. After completion, the resulting product is heated to 90°C to dry and remove moisture, yielding a modified sound-absorbing material (such as...). Figure 1 (As shown), for later use.

[0038] (4) Spray 0.25 mol / L sulfuric acid onto the asbestos fibers in a ratio of 2 mL: 1 g. After stirring evenly, let stand for 5 hours. Then, add sodium stearate saturated solution dropwise to the fibers in a ratio of 15 mL: 1 g, and heat in a water bath to 60°C for 1 hour. After completion, filter out the fibers and dry to obtain modified asbestos fibers (e.g., ...). Figure 2 (As shown), for later use.

[0039] (5) Take the following raw materials in the following proportions: 105 parts by weight of 42.5 ordinary silicate cement, 140 parts by weight of river sand, 230 parts by weight of the modified sound-absorbing material of this embodiment, 20 parts by weight of the modified asbestos fiber of this embodiment, 4.2 parts by weight of potassium magnesium phosphate cement, 1.8 parts by weight of polycarboxylate superplasticizer, and 0.7 parts by weight of organosilicon defoamer. Add the above raw materials to a mixer and stir for 5 minutes. Then add 46 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and sound insulation cement-based mortar material.

[0040] Performance Testing: 1. The cement-based mortar material of this embodiment was prepared into specimens, and its impact sound improvement ΔLw was tested according to GB / T 19889.8-2006 to measure the sound insulation effect of the cement-based mortar material. 2. The 28-day compressive and flexural strengths of the cement-based mortar material prepared in this embodiment were tested according to GB / T 17671-2021 "Test Method for Mortar Strength (ISO Method)". The results are shown in the table below:

[0041] Example 2: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: (1) Take the following proportions of raw materials: 100 parts by weight of rubber granules, 25 parts by weight of vitrified microspheres, 75 parts by weight of granulated blast furnace slag powder, 11 parts by weight of desulfurized gypsum powder, 2 parts by weight of calcium carbide slag powder, 13 parts by weight of calcium silicate powder, and 40 parts by weight of water. The particle size of the rubber granules and vitrified microspheres is distributed between 0.1 and 0.3 mm.

[0042] (2) First, add the rubber particles, vitrified microspheres, granulated blast furnace slag powder, desulfurized gypsum powder, carbide slag powder, and calcium silicate powder to a mixer and stir for 5 minutes. Then, add the water and continue stirring for 2 minutes. Pour the resulting slurry into a mold for curing (7 days, temperature set at 20±2℃, relative humidity ≥95%). After completion, crush the resulting solidified body and sieve it. Use the particles with a particle size distribution between 2 and 5 mm as pre-treated sound-absorbing materials for later use.

[0043] (3) The pretreated sound-absorbing material is mixed with water to form a wet material with a moisture content of 35%. This wet material is then placed in a reactor, sealed, and filled with sufficient carbon dioxide gas for a reaction time of 5 hours at a temperature of 90°C. After the reaction is complete, the resulting product is heated to 90°C to dry and remove moisture, yielding a modified sound-absorbing material (such as...). Figure 3 (As shown), for later use.

[0044] (4) Spray 0.35 mol / L sulfuric acid onto the asbestos fibers in a ratio of 1 mL: 1 g. After stirring evenly, let stand for 6.5 hours. Then, add sodium stearate saturated solution dropwise to the fibers in a ratio of 20 mL: 1 g, and heat in a water bath to 50°C for 1.5 hours. After completion, filter out the fibers and dry them to obtain modified asbestos fibers (e.g., ...). Figure 4 (As shown), for later use.

[0045] (5) Take the following raw materials in the following proportions: 115 parts by weight of 42.5 ordinary silicate cement, 150 parts by weight of river sand, 240 parts by weight of the modified sound-absorbing material of this embodiment, 23 parts by weight of the modified asbestos fiber of this embodiment, 4.5 parts by weight of potassium magnesium phosphate cement, 1.6 parts by weight of polycarboxylate superplasticizer, and 0.6 parts by weight of organosilicon defoamer. Add the above raw materials to a mixer and stir for 5 minutes. Then add 48 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and sound insulation cement-based mortar material.

[0046] Performance testing: The impact sound improvement ΔLw and 28-day compressive and flexural strength of the cement-based mortar material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in the table below:

[0047] Example 3: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: (1) Take the following raw materials in the following proportions: 130 parts by weight of rubber granules, 50 parts by weight of vitrified microspheres, 85 parts by weight of granulated blast furnace slag powder, 19 parts by weight of desulfurized gypsum powder, 5 parts by weight of calcium carbide slag powder, 17 parts by weight of calcium silicate powder, and 45 parts by weight of water. The particle size of the rubber granules and vitrified microspheres is distributed between 0.1 and 0.3 mm.

[0048] (2) First, add the rubber particles, vitrified microspheres, granulated blast furnace slag powder, desulfurized gypsum powder, carbide slag powder, and calcium silicate powder to a mixer and stir for 5 minutes. Then, add the water and continue stirring for 2 minutes. Pour the resulting slurry into a mold for curing (14 days, temperature set at 20±2℃, relative humidity ≥95%). After completion, crush the resulting solidified body and sieve it. Use the particles with a particle size distribution between 2 and 5 mm as pre-treated sound-absorbing materials for later use.

[0049] (3) The pretreated sound-absorbing material is mixed with water to form a wet material with a moisture content of 20%. This wet material is then placed in a reactor, sealed, and filled with sufficient carbon dioxide gas for a reaction time of 7 hours at a temperature of 80°C. After completion, the resulting product is heated to 90°C to dry and remove moisture, yielding the modified sound-absorbing material (e.g., Figure 5 (As shown), for later use.

[0050] (4) Spray 0.2 mol / L nitric acid onto the asbestos fibers in a ratio of 2.5 mL: 1 g. After stirring evenly, let stand for 4 hours. Then, add sodium stearate saturated solution dropwise to the fibers in a ratio of 10 mL: 1 g, and heat in a water bath to 50°C for 1.5 hours. After completion, filter out the fibers and dry to obtain modified asbestos fibers (e.g., ...). Figure 6 (As shown), for later use.

[0051] (5) Take the following raw materials in the following proportions: 100 parts by weight of 42.5 ordinary silicate cement, 130 parts by weight of river sand, 220 parts by weight of the modified sound-absorbing material of this embodiment, 18 parts by weight of the modified asbestos fiber of this embodiment, 3.2 parts by weight of potassium magnesium phosphate cement, 2 parts by weight of naphthalene-based water-reducing agent, and 0.75 parts by weight of naphthalene-based water-reducing agent. Add the above raw materials to a mixer and stir for 5 minutes, then add 44 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and sound insulation cement-based mortar material.

[0052] Performance testing: The impact sound improvement ΔLw and 28-day compressive and flexural strength of the cement-based mortar material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in the table below:

[0053] Example 4: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: (1) Rubber particles and vitrified microspheres are mixed evenly at a ratio of 113 parts by weight to 40 parts by weight to obtain a sound-absorbing material. The particle size of the rubber particles and vitrified microspheres is distributed between 0.1 and 0.3 mm.

[0054] (2) Take the following raw materials in the following proportions: 105 parts by weight of 42.5 ordinary silicate cement, 140 parts by weight of river sand, 230 parts by weight of the sound-absorbing material described in this embodiment, 20 parts by weight of the modified asbestos fiber of Example 1 above, 4.2 parts by weight of potassium magnesium phosphate cement, 1.8 parts by weight of polycarboxylate superplasticizer, and 0.7 parts by weight of organosilicon defoamer. Add the above raw materials to a mixer and stir for 5 minutes, then add 46 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and sound insulation cement-based mortar material.

[0055] Performance testing: The impact sound improvement ΔLw and 28-day compressive and flexural strength of the cement-based mortar material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in the table below:

[0056] Example 5: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: (1) Take the following proportions of raw materials: 153 parts by weight of rubber granules, 80 parts by weight of granulated blast furnace slag powder, 15 parts by weight of desulfurized gypsum powder, 3.5 parts by weight of calcium carbide slag powder, 14 parts by weight of calcium silicate powder, and 42 parts by weight of water. The particle size of the rubber granules and vitrified microspheres is distributed between 0.1 and 0.3 mm.

[0057] (2) First, add the rubber granules, granulated blast furnace slag powder, desulfurized gypsum powder, carbide slag powder, and calcium silicate powder to a mixer and stir for 5 minutes. Then, add the water and continue stirring for 2 minutes. Pour the resulting slurry into a mold for curing (10 days, temperature set at 20±2℃, relative humidity ≥95%). After completion, crush the resulting solidified body and sieve it. Use the particles with a particle size distribution between 2 and 5 mm as pre-treated sound-absorbing materials for later use.

[0058] (3) The pretreated sound-absorbing material is mixed with water to form a wet material with a moisture content of 28%. This wet material is then placed in a reactor, sealed, and filled with sufficient carbon dioxide gas for a reaction time of 6 hours at a temperature of 85°C. After completion, the resulting product is heated to 90°C to dry and remove moisture, yielding a modified sound-absorbing material (such as...). Figure 7 (As shown), for later use.

[0059] (4) Take the following raw materials in the following proportions: 105 parts by weight of 42.5 ordinary silicate cement, 140 parts by weight of river sand, 230 parts by weight of the modified sound-absorbing material of this embodiment, 20 parts by weight of the modified asbestos fiber of Example 1 above, 4.2 parts by weight of potassium magnesium phosphate cement, 1.8 parts by weight of polycarboxylate superplasticizer, and 0.7 parts by weight of organosilicon defoamer. Add the above raw materials to a mixer and stir for 5 minutes, then add 46 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and sound insulation cement-based mortar material.

[0060] Performance testing: The impact sound improvement ΔLw and 28-day compressive and flexural strength of the cement-based mortar material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in the table below:

[0061] Example 6: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: Take the following raw materials in the following proportions: 115 parts by weight of 42.5 ordinary Portland cement, 150 parts by weight of river sand, 240 parts by weight of the modified sound-absorbing material of Example 2 above, 23 parts by weight of asbestos fiber, 4.5 parts by weight of potassium magnesium phosphate cement, 1.6 parts by weight of polycarboxylate superplasticizer, and 0.6 parts by weight of organosilicon defoamer. Add the above raw materials to a mixer and stir for 5 minutes. Then add 48 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and soundproofing cement-based mortar material.

[0062] Performance testing: The impact sound improvement ΔLw and 28-day compressive and flexural strength of the cement-based mortar material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in the table below:

[0063] Example 7: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: (1) Spray 0.2 mol / L nitric acid onto asbestos fibers in a ratio of 2.5 mL: 1 g. Stir well and let stand for 4 hours, then filter out the fibers and dry to obtain modified asbestos fibers (e.g. Figure 8 (As shown), for later use.

[0064] (2) Take the following raw materials in the following proportions: 100 parts by weight of 42.5 ordinary silicate cement, 130 parts by weight of river sand, 220 parts by weight of the modified sound-absorbing material of Example 3 above, 18 parts by weight of the modified asbestos fiber of this example, 3.2 parts by weight of potassium magnesium phosphate cement, 2 parts by weight of naphthalene-based water-reducing agent, and 0.75 parts by weight of naphthalene-based water-reducing agent. Add the above raw materials to a mixer and stir for 5 minutes, then add 44 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and sound insulation cement-based mortar material.

[0065] Performance testing: The impact sound improvement ΔLw and 28-day compressive and flexural strength of the cement-based mortar material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in the table below:

[0066] Example 8: A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, comprising the following steps: Take the following raw materials in the following proportions: 115 parts by weight of 42.5 ordinary Portland cement, 150 parts by weight of river sand, 240 parts by weight of the modified sound-absorbing material of Example 2 above, 23 parts by weight of the modified asbestos fiber of Example 2 above, 1.6 parts by weight of polycarboxylate superplasticizer, and 0.6 parts by weight of silicone defoamer. Add the above raw materials to a mixer and stir for 5 minutes. Then add 48 parts by weight of mixing water and continue stirring for 2 minutes to obtain the thermal insulation and sound insulation cement-based mortar material.

[0067] Performance testing: The impact sound improvement ΔLw and 28-day compressive and flexural strength of the cement-based mortar material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in the table below:

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material, characterized in that, Includes the following steps: (1) Mix rubber particles, vitrified microspheres, granulated blast furnace slag powder, desulfurized gypsum powder, carbide slag powder and calcium silicate powder, add water and stir evenly, then cure, and after completion, crush the obtained solid body to obtain pretreated sound-absorbing material. (2) The pretreated sound-absorbing material is mixed with water to form a wet material, and then the wet material is placed in a closed reactor containing carbon dioxide gas to react. After the reaction is completed, the water is dried to remove the moisture and the modified sound-absorbing material is obtained. (3) After wetting the surface of the asbestos fiber with acid solution, let it stand, then add saturated sodium stearate solution dropwise and heat it to react; after completion, separate the fiber to obtain modified asbestos fiber; (4) Using silicate cement, sand, the modified sound-absorbing material, the modified asbestos fiber, potassium magnesium phosphate cement, water-reducing agent, and defoamer as raw materials, mix them evenly and then add mixing water to stir evenly to obtain the thermal insulation and sound insulation cement-based mortar material.

2. The preparation method of the high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to claim 1, characterized in that, In step (1), the proportions of each component are as follows: 100-130 parts by weight of rubber granules, 25-50 parts by weight of vitrified microspheres, 75-85 parts by weight of granulated blast furnace slag powder, 11-19 parts by weight of desulfurized gypsum powder, 2-5 parts by weight of calcium carbide slag powder, 13-17 parts by weight of silica-calcium stone powder, and 40-45 parts by weight of water.

3. The preparation method of the high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to claim 1, characterized in that, In step (1), the particle size of the rubber particles and vitrified microspheres is 0.1~0.3mm.

4. The preparation method of the high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to claim 1, characterized in that, In step (1), the curing time is 7 to 14 days, the curing temperature is 20±2℃, and the relative humidity is ≥95%; optionally, in step (1), the particle size of the pretreated sound-absorbing material is 2 to 5 mm.

5. The preparation method of the high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to claim 1, characterized in that, In step (2), the moisture content of the wet material is 20-35%.

6. The preparation method of the high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to claim 1, characterized in that, In step (2), the reaction time is 5 to 7 hours and the reaction temperature is set to 80 to 90°C.

7. The preparation method of the high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to claim 1, characterized in that, In step (3), the ratio of acid solution to asbestos fiber is 1~2.5mL:1g; Optionally, in step (3), the acid solution includes at least one of sulfuric acid and nitric acid; Optionally, in step (3), the concentration of the acid solution is 0.2~0.35 mol / L; Optionally, in step (3), the settling time is 4 to 6.5 hours.

8. The preparation method of the high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to claim 1, characterized in that, In step (3), the ratio of the sodium stearate saturated solution to asbestos fiber is 10~20mL:1g; Optionally, in step (3), the heating reaction temperature is 50~60℃ and the time is 1~1.5 hours.

9. The method for preparing high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to any one of claims 1-8, characterized in that, In step (4), the proportions of each component in the raw materials are as follows: 100-115 parts by weight of silicate cement, 130-150 parts by weight of sand, 220-240 parts by weight of the modified sound-absorbing material, 18-23 parts by weight of the modified asbestos fiber, 3.2-4.5 parts by weight of potassium magnesium phosphate cement, 1.6-2 parts by weight of water-reducing agent, 0.6-0.75 parts by weight of defoamer, and 44-48 parts by weight of mixing water.

10. The method for preparing high-strength, impermeable, thermally insulating, and sound-insulating cement-based mortar material according to any one of claims 1-8, characterized in that, In step (4), the water-reducing agent includes at least one of polycarboxylate water-reducing agent, naphthalene water-reducing agent, aliphatic water-reducing agent, and lignin sulfonate water-reducing agent; Optionally, in step (4), the defoamer includes at least one of polyether defoamer and silicone defoamer.

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