Heat-insulation sound-insulation light foaming environment-friendly concrete material and preparation method thereof

Abstract

The invention relates to a heat-insulation sound-insulation light foaming environment-friendly concrete material and a preparation method thereof, and belongs to the technical field of concrete materials. According to the invention, self-made modified polystyrene particles, fly ash, cement, a polycarboxylate superplasticizer, sodium abietate, ettringite, magnesium lignosulfonate and deionized water are used as raw materials to prepare the heat-insulation sound-insulation light foaming environment-friendly concrete material. The preparation method comprises the following steps: mixing fly ash, cement, sodium abietate, ettringite and magnesium lignosulfonate to prepare a dry concrete material, dissolving a polycarboxylate superplasticizer with deionized water, and mixing the dissolved polycarboxylate superplasticizer with the dry concrete material to obtain prefabricated slurry; finally, the prefabricated slurry is poured into the modified polystyrene particles to obtain the heat-preservation sound-insulation light foaming environment-friendly concrete material, and the prepared concrete material is uniform in component, lower in density, safe, environmentally friendly, good in heat preservation and sound insulation capacity and capable of being widely applied to the field of heat preservation materials.

Description

Technical Field

[0001] The present invention belongs to the technical field of concrete materials, and specifically relates to a heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material and a preparation method thereof. Background Art

[0002] Heat-insulating and sound-insulating concrete is a building material with heat-insulating and sound-insulating functions. By adding specific heat-insulating and sound-insulating materials to the concrete, the concrete not only has the functions of traditional concrete materials but also has good heat-insulating and sound-insulating properties, and is widely used in places such as residences, hospitals, schools, and hotels. The density and thickness of heat-insulating and sound-insulating concrete are important factors affecting its heat-insulating and sound-insulating effects. Generally speaking, the higher the density and the greater the thickness of the concrete, the better the heat-insulating and sound-insulating properties. However, increasing the density and thickness of the concrete material will, on the one hand, increase the weight of the building and may also cause cracks due to excessive internal stress in the concrete. Therefore, the improvement effect of increasing the thickness and density on the heat-insulating and sound-insulating effects is very limited.

[0003] Polystyrene materials have good heat-insulating and sound-insulating properties, good thermal stability and relatively light self-weight. However, when used as building materials, there is a problem that cannot be ignored, that is, the flammability of polystyrene materials. When burning, they are prone to release thick smoke and toxic volatile substances, which may cause great damage to life and property safety. Based on this, the present invention provides a heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material and a preparation method thereof to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material and a preparation method thereof to solve the problems mentioned in the above background art.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material, comprising the following raw materials in parts by mass: 14-20 parts of modified polystyrene particles, 60-80 parts of fly ash, 100-130 parts of cement, 4.2-6 parts of polycarboxylate water reducer, 2-4 parts of sodium rosinate, 6-8 parts of ettringite, 0.4-1 part of magnesium lignosulfonate, and 60-80 parts of deionized water; A preparation method of a heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material, comprising the following steps: First step, weigh each raw material according to the parts by mass: 14-20 parts of modified polystyrene particles, 60-80 parts of fly ash, 100-130 parts of cement, 4.2-6 parts of water reducer, 2-4 parts of sodium rosinate, 6-8 parts of ettringite, 0.4-1 part of lignosulfonic acid, and 60-80 parts of deionized water; Step 2: Add cement, fly ash, sodium rosinate, ettringite, and magnesium lignosulfonate into a mixer, and obtain dry concrete materials through stirring and mixing. Step 3: Mix polycarboxylate water reducer and deionized water in a container, add the dry concrete materials obtained in Step 2 into the container, and obtain precast slurry through stirring and mixing. Step 4: Pour the precast slurry obtained in Step 3 into a container filled with modified polystyrene particles, mix evenly, then press and mold, cover with a plastic wrap, and cure for 6 days. After that, demold and cure for another 14 days to obtain a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material.

[0006] Further, the rotation speed condition for stirring in Step 2 is 200 - 300 rpm, and the stirring time condition is 20 - 40 min.

[0007] Further, the rotation speed condition for stirring in Step 3 is 150 - 200 rpm, and the stirring time condition is 60 - 90 min.

[0008] Further, the pressure condition for press and molding in Step 4 is 1 - 2 MPa, and the press and molding time condition is 10 - 15 min.

[0009] Further, the temperature condition for curing in Step 4 is 23 - 27 °C, and the environmental humidity condition for curing is 80 - 90%.

[0010] The modified polystyrene particles are prepared by the following steps: Step 1: Mix 4 - maleimidophenyl, triethylamine, and methyl cyclopentyl ether in a three - necked flask, start magnetic stirring, and under the condition of an ice - water bath, use a separatory funnel to dropwise add a mixed solution of carbon tetrachloride and diethyl phosphite into the three - necked flask. Then continue to stir and react for 4 - 6 h under the ice - water bath condition. After the reaction is completed, add deionized water to the three - necked flask for washing, extract with petroleum ether, and then separate the organic layer with a separatory funnel. The organic layer is rotary evaporated to obtain Intermediate 1. Step 2: Mix 4 - vinylbenzoyl chloride, hydroxymethyltriethoxysilane, triethylamine, and methyl cyclopentyl ether in a three - necked flask, install a condenser and a thermometer, start magnetic stirring, and react at a temperature of 40 - 60 °C for 3 - 4 h. After the reaction is completed, wash with saturated sodium carbonate solution, extract with dichloromethane, and then separate the organic layer with a separatory funnel. The organic layer is rotary evaporated to obtain Intermediate 2. Step 3: Mix intermediate 1, intermediate 2, and styrene in a three-necked flask. Install a condenser and a thermometer, start magnetic stirring, and then add benzoyl peroxide and azobisisobutyronitrile to the three-necked flask. After stirring at room temperature for 1 h, add sodium chloride solution and polyvinyl alcohol to the three-necked flask, raise the temperature of the system to 60 - 70 °C, and continue stirring for 2 - 3 h. Then add sodium dodecylbenzenesulfonate and n-pentane to the three-necked flask, raise the temperature of the system to 80 - 90 °C, and continue stirring and reacting for 24 h. After the reaction is completed, perform vacuum filtration. The obtained solid is washed with ethyl acetate and absolute ethanol and dried to obtain the modified polystyrene particles.

[0011] Further, the mixed solution of carbon tetrachloride and diethyl phosphite in Step 1 is prepared from 0.1 mol of carbon tetrachloride and 0.08 mol of diethyl phosphite.

[0012] Further, the dosage ratio of 4-maleimidylphenol, triethylamine, methyl cyclopentyl ether, the mixed solution of carbon tetrachloride and diethyl phosphite used in Step 1 is 0.1 mol : 0.1 - 0.12 mol : 40 - 60 mL : 26.4 g.

[0013] Further, the dosage ratio of 4-vinylbenzoyl chloride, hydroxymethyltriethoxysilane, triethylamine, and methyl cyclopentyl ether used in Step 2 is 0.1 mol : 0.1 mol : 0.12 - 0.15 mol : 40 - 60 mL.

[0014] Further, the sodium chloride solution used in Step 3 is an aqueous sodium chloride solution with a mass fraction of 24%.

[0015] Further, the dosage ratio of intermediate 1, intermediate 2, styrene, benzoyl peroxide, azobisisobutyronitrile, sodium chloride solution, polyvinyl alcohol, sodium dodecylbenzenesulfonate, and n-pentane used in Step 3 is 0.06 mol : 0.06 - 0.08 mol : 0.1 mol : 0.4 - 0.64 g : 0.4 - 0.56 g : 18 - 22 mL : 0.8 - 1.2 g : 2.4 - 3 g : 3.6 - 4.4 g.

[0016] The beneficial effects of the present invention: The present invention prepares a heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material by using self-made modified polystyrene particles, fly ash, cement, polycarboxylate water reducer, sodium rosinate, ettringite, magnesium lignosulfonate, and deionized water. In the present invention, fly ash, cement, sodium rosinate, ettringite, and magnesium lignosulfonate are first mixed to prepare a concrete dry material, then the polycarboxylate water reducer is dissolved in deionized water and mixed with the concrete dry material to obtain a precast slurry, and finally the precast slurry is poured into the modified polystyrene particles to obtain a heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material. In the preparation method of the present invention, ettringite is used as an expansion agent, and magnesium lignosulfonate and sodium rosinate are used as air-entraining agents, and a large number of pores are generated in the prepared concrete material. These pores can cause the path of heat propagation in the concrete material to become longer, thereby reducing the thermal conductivity of the concrete material. In addition, the preparation method of the present invention uses modified polystyrene particles instead of rigid aggregates, which can reduce the density of the concrete material while improving the heat insulation and sound insulation capabilities of the concrete material.

[0017] The present invention uses 4-maleimidophenol, carbon tetrachloride, and diethyl phosphite as raw materials. In the system, carbon tetrachloride and diethyl phosphite first undergo an Atherton-Todd reaction to form diethyl chlorophosphate, and then an esterification reaction occurs with the hydroxyl group of 4-maleimidophenol under the condition of using triethylamine as an acid-binding agent to obtain intermediate 1. At the same time, 4-vinylbenzoyl chloride and hydroxymethyltriethoxysilane undergo an esterification reaction under the condition of using triethylamine as an acid-binding agent to obtain intermediate 2. Finally, intermediate 1, intermediate 2, and styrene are used as polymerization monomers, and through a free radical polymerization reaction under the action of initiators benzoyl peroxide and azobisisobutyronitrile, and in the presence of foaming agent n-pentane, particles are formed to obtain modified polystyrene particles; the modified polystyrene particles prepared by the present invention contain a large number of phosphate ester and organosilicon structures, which can not only improve the flame retardant performance of the modified polystyrene particles but also make the surface of the modified polystyrene particles have good inorganic affinity, thereby improving the dispersibility and binding ability of the modified polystyrene particles in the concrete material.

[0018] The preparation method of the heat-insulating, sound-insulating, lightweight, foamed and environmentally friendly concrete material of the present invention is simple. The prepared concrete material has uniform components, lower density, is safe and environmentally friendly, and has good heat insulation and sound insulation capabilities, and can be widely used in the field of heat insulation materials. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Example 1

[0020] A modified polystyrene particle is prepared by the following steps: Step 1: Mix 0.1 mol of 4-maleimidophenol, 0.1 mol of triethylamine, and 40 mL of methylcyclopentyl ether in a three-necked flask. Start magnetic stirring, and under the condition of an ice-water bath, use a separatory funnel to dropwise add 26.4 g of a mixed solution prepared from 0.1 mol of carbon tetrachloride and 0.08 mol of diethyl phosphite into the three-necked flask. Then continue to stir and react for 4 h under the ice-water bath condition. After the reaction is completed, add deionized water to the three-necked flask for washing, and extract with petroleum ether. Then use a separatory funnel to separate the organic layer, and the organic layer is rotary evaporated to obtain intermediate 1; Step 2: Mix 0.1 mol of 4-vinylbenzoyl chloride, 0.1 mol of hydroxymethyltriethoxysilane, 0.12 mol of triethylamine, and 40 mL of methylcyclopentyl ether in a three-necked flask. Install a condenser and a thermometer, start magnetic stirring, and react at a temperature of 40 °C for 3 h. After the reaction is completed, wash with saturated sodium carbonate solution and extract with dichloromethane. Then use a separatory funnel to separate the organic layer, and the organic layer is rotary evaporated to obtain intermediate 2; Step 3: Mix 0.06 mol of intermediate 1, 0.06 mol of intermediate 2, and 0.1 mol of styrene in a three-necked flask. Install a condenser and a thermometer, start magnetic stirring, then add 0.4 g of benzoyl peroxide and 0.4 g of azobisisobutyronitrile to the three-necked flask. After stirring at room temperature for 1 h, add 18 mL of a 24% sodium chloride aqueous solution by mass and 0.8 g of polyvinyl alcohol to the three-necked flask, and raise the temperature of the system to 60 °C. Continue stirring for 2 h, then add 2.4 g of sodium dodecylbenzenesulfonate and 3.6 g of n-pentane to the three-necked flask, and raise the temperature of the system to 80 °C. Continue stirring and reacting for 24 h. After the reaction is completed, perform vacuum filtration. The obtained solid is washed with ethyl acetate and absolute ethanol and dried to obtain the modified polystyrene particle. Example 2

[0021] A modified polystyrene particle is prepared by the following steps: Step 1: Mix 0.1 mol of 4-maleimidophenol, 0.11 mol of triethylamine, and 50 mL of methylcyclopentyl ether in a three-necked flask. Start magnetic stirring, and under the condition of an ice-water bath, use a separatory funnel to dropwise add 26.4 g of a mixed solution prepared from 0.1 mol of carbon tetrachloride and 0.08 mol of diethyl phosphite into the three-necked flask. Then continue to stir and react for 5 h under the ice-water bath condition. After the reaction is completed, add deionized water to the three-necked flask for washing, and extract with petroleum ether. Then use a separatory funnel to separate the organic layer, and the organic layer is rotary evaporated to obtain intermediate 1; Step 2: Mix 0.1 mol of 4-vinylbenzoyl chloride, 0.1 mol of hydroxymethyltriethoxysilane, 0.135 mol of triethylamine, and 50 mL of methylcyclopentyl ether in a three-necked flask. Install a condenser and a thermometer, start magnetic stirring, and react at 50 °C for 3.5 h. After the reaction is completed, wash with saturated sodium carbonate solution, extract with dichloromethane, and then separate the organic layer with a separatory funnel. The organic layer is rotary evaporated to obtain Intermediate 2; Step 3: Mix 0.06 mol of Intermediate 1, 0.07 mol of Intermediate 2, and 0.1 mol of styrene in a three-necked flask. Install a condenser and a thermometer, start magnetic stirring, and then add 0.52 g of benzoyl peroxide and 0.48 g of azobisisobutyronitrile to the three-necked flask. After stirring at room temperature for 1 h, add 20 mL of 24% sodium chloride aqueous solution and 1 g of polyvinyl alcohol to the three-necked flask, and raise the temperature of the system to 65 °C. Continue stirring for 2.5 h, then add 2.7 g of sodium dodecylbenzenesulfonate and 4 g of n-pentane to the three-necked flask, and raise the temperature of the system to 85 °C. Continue stirring and reacting for 24 h. After the reaction is completed, perform vacuum filtration. The obtained solid is washed with ethyl acetate and absolute ethanol and dried to obtain the modified polystyrene particles. Example 3

[0022] A kind of modified polystyrene particles is prepared by the following steps: Step 1: Mix 0.1 mol of 4-maleimidophenol, 0.12 mol of triethylamine, and 60 mL of methylcyclopentyl ether in a three-necked flask. Start magnetic stirring, and use a separatory funnel to dropwise add a mixed solution prepared from 26.4 g of 0.1 mol of carbon tetrachloride and 0.08 mol of diethyl phosphite to the three-necked flask under an ice-water bath. Then continue to stir and react for 6 h under an ice-water bath. After the reaction is completed, add deionized water to wash the three-necked flask, extract with petroleum ether, and then separate the organic layer with a separatory funnel. The organic layer is rotary evaporated to obtain Intermediate 1; Step 2: Mix 0.1 mol of 4-vinylbenzoyl chloride, 0.1 mol of hydroxymethyltriethoxysilane, 0.15 mol of triethylamine, and 60 mL of methylcyclopentyl ether in a three-necked flask. Install a condenser and a thermometer, start magnetic stirring, and react at 60 °C for 4 h. After the reaction is completed, wash with saturated sodium carbonate solution, extract with dichloromethane, and then separate the organic layer with a separatory funnel. The organic layer is rotary evaporated to obtain Intermediate 2; Step 3: Mix 0.06 mol of intermediate 1, 0.08 mol of intermediate 2, and 0.1 mol of styrene in a three-necked flask. Install a condenser and a thermometer, start magnetic stirring, and then add 0.64 g of benzoyl peroxide and 0.56 g of azobisisobutyronitrile to the three-necked flask. After stirring at room temperature for 1 h, add 22 mL of a 24% sodium chloride aqueous solution and 1.2 g of polyvinyl alcohol to the three-necked flask, and raise the temperature of the system to 70 °C. Continue stirring for 3 h, then add 3 g of sodium dodecylbenzenesulfonate and 4.4 g of n-pentane to the three-necked flask, and raise the temperature of the system to 90 °C. Continue stirring and reacting for 24 h. After the reaction is completed, perform vacuum filtration. The obtained solid is washed with ethyl acetate and absolute ethanol and dried to obtain the modified polystyrene particles.

[0023] Experimental Example 1 Refer to the national standard GB8624-2012 "Classification of the Burning Performance of Building Materials and Products" to test the flame retardancy of the modified polystyrene particles obtained in Examples 1-3. The unmodified polystyrene particles are used as a blank control. The test results are shown in Table 1: Table 1 Project Flame retardant grade Example 1 A2 Example 2 A2 Example 3 A2 Blank control B2 It can be seen from Table 1 that the modified polystyrene particles prepared by the present invention have good flame retardancy. Therefore, using the modified polystyrene particles of the present invention can solve the shortcoming that polystyrene materials are flammable. Example 4

[0024] A heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material contains the following raw materials in parts by mass: 14 parts of the modified polystyrene particles obtained in Example 1, 60 parts of fly ash, 100 parts of cement, 4.2 parts of polycarboxylate superplasticizer, 2 parts of sodium rosinate, 6 parts of ettringite, 0.4 part of lignosulfonate magnesium, and 60 parts of deionized water; A preparation method of a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material includes the following steps: First step: Weigh each raw material according to 14 parts of the modified polystyrene particles obtained in Example 1, 60 parts of fly ash, 100 parts of cement, 4.2 parts of polycarboxylate superplasticizer, 2 parts of sodium rosinate, 6 parts of ettringite, 0.4 part of lignosulfonate magnesium, and 60 parts of deionized water in parts by mass; Second step: Add cement, fly ash, sodium rosinate, ettringite, and lignosulfonate magnesium to a mixer and stir for 20 min at a rotation speed of 200 rpm to obtain dry concrete; Third step: Mix the polycarboxylate superplasticizer and deionized water in a container, and add the dry concrete obtained in the second step to the container, and then stir for 60 min at a rotation speed of 150 rpm to obtain a precast slurry; Step 4: Pour the prefabricated slurry obtained in Step 3 into a container filled with the modified polystyrene particles obtained in Example 1. After mixing evenly, press and mold it at a pressure of 1 MPa for 10 minutes, cover it with a plastic wrap, and cure it for 6 days at a temperature of 23 °C and an environmental humidity of 80%. Then demold it and cure it for another 14 days to obtain a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material. Example 5

[0025] A heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following raw materials in parts by mass: 14 parts of the modified polystyrene particles obtained in Example 2, 80 parts of fly ash, 130 parts of cement, 6 parts of polycarboxylate water reducer, 2 parts of sodium rosinate, 6 parts of ettringite, 0.4 part of lignosulfonate magnesium, and 60 parts of deionized water; A preparation method of a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following steps: Step 1: Weigh each raw material according to 14 parts of the modified polystyrene particles obtained in Example 2, 80 parts of fly ash, 130 parts of cement, 6 parts of polycarboxylate water reducer, 2 parts of sodium rosinate, 6 parts of ettringite, 0.4 part of lignosulfonate magnesium, and 60 parts of deionized water in parts by mass; Step 2: Add the cement, fly ash, sodium rosinate, ettringite, and lignosulfonate magnesium into a mixer, and stir and mix them for 30 minutes at a rotation speed of 250 rpm to obtain a dry concrete mixture; Step 3: Mix the polycarboxylate water reducer and deionized water in a container, add the dry concrete mixture obtained in Step 2 into the container, and then stir and mix them for 75 minutes at a rotation speed of 175 rpm to obtain a prefabricated slurry; Step 4: Pour the prefabricated slurry obtained in Step 3 into a container filled with the modified polystyrene particles obtained in Example 2. After mixing evenly, press and mold it at a pressure of 1.5 MPa for 12 minutes, cover it with a plastic wrap, and cure it for 6 days at a temperature of 25 °C and an environmental humidity of 85%. Then demold it and cure it for another 14 days to obtain a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material. Example 6

[0026] A heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following raw materials in parts by mass: 20 parts of the modified polystyrene particles obtained in Example 3, 80 parts of fly ash, 130 parts of cement, 4.2 parts of polycarboxylate water reducer, 4 parts of sodium rosinate, 8 parts of ettringite, 1 part of lignosulfonate magnesium, and 80 parts of deionized water; A preparation method of a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following steps: Step 1: Weigh each raw material according to the parts by mass: 20 parts of the modified polystyrene particles obtained in Example 3, 80 parts of fly ash, 130 parts of cement, 4.2 parts of polycarboxylate superplasticizer, 4 parts of sodium rosinate, 8 parts of ettringite, 1 part of magnesium lignosulfonate, and 80 parts of deionized water; Step 2: Add the cement, fly ash, sodium rosinate, ettringite, and magnesium lignosulfonate into a mixer, and stir for 40 min at a rotation speed of 300 rpm to obtain dry concrete materials; Step 3: Mix the polycarboxylate superplasticizer and deionized water in a container, add the dry concrete materials obtained in the second step into the container, and then stir for 90 min at a rotation speed of 200 rpm to obtain precast slurries; Step 4: Pour the precast slurries obtained in the third step into a container filled with the modified polystyrene particles obtained in Example 3, mix evenly, then press and mold at a pressure of 2 MPa for 15 min, cover with a plastic wrap, cure at a temperature of 27 °C and an environmental humidity of 90% for 6 days, then demold and cure for another 14 days to obtain a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material.

[0027] Comparative Example 1 A heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following raw materials in parts by mass: 20 parts of the modified polystyrene particles obtained in Example 3, 80 parts of fly ash, 130 parts of cement, 4.2 parts of polycarboxylate superplasticizer, and 80 parts of deionized water; A preparation method of a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following steps: Step 1: Weigh each raw material according to the parts by mass: 20 parts of the modified polystyrene particles obtained in Example 3, 80 parts of fly ash, 130 parts of cement, 4.2 parts of polycarboxylate superplasticizer, and 80 parts of deionized water; Step 2: Add the cement and fly ash into a mixer, and stir for 40 min at a rotation speed of 300 rpm to obtain dry concrete materials; Step 3: Mix the polycarboxylate superplasticizer and deionized water in a container, add the dry concrete materials obtained in the second step into the container, and then stir for 90 min at a rotation speed of 200 rpm to obtain precast slurries; Step 4: Pour the precast slurries obtained in the third step into a container filled with the modified polystyrene particles obtained in Example 3, mix evenly, then press and mold at a pressure of 2 MPa for 15 min, cover with a plastic wrap, cure at a temperature of 27 °C and an environmental humidity of 90% for 6 days, then demold and cure for another 14 days to obtain a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material.

[0028] Comparative Example 2 A heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following raw materials in parts by mass: 80 parts of fly ash, 130 parts of cement, 4.2 parts of polycarboxylate water reducer, and 80 parts of deionized water; A preparation method of a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material, comprising the following steps: First step: Weigh each raw material according to 80 parts of fly ash, 130 parts of cement, 4.2 parts of polycarboxylate water reducer, and 80 parts of deionized water in parts by mass; Second step: Add the cement and fly ash into a mixer, and stir for 40 minutes at a rotation speed of 300 rpm to obtain dry concrete; Third step: Mix the polycarboxylate water reducer and deionized water in a container, add the dry concrete obtained in the second step into the container, and then stir for 90 minutes at a rotation speed of 200 rpm to obtain a precast slurry; Fourth step: Pour the precast slurry obtained in the third step into a container, press-mold it for 15 minutes at a pressure of 2 MPa to form, cover it with a plastic wrap, cure it for 6 days at a temperature of 27 °C and an environmental humidity of 90%, and then demold and cure it for another 14 days to obtain a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material.

[0029] Comparative Example 3 This comparative example is a concrete exterior wall insulation block sold by Liangshan Yanli New Building Materials Co., Ltd.

[0030] Perform performance tests on a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material in Examples 4 - 6 and Comparative Examples 1 - 2 and the commercially available concrete exterior wall insulation block in Comparative Example 3 respectively. Refer to GB10294 - 2008 "Determination of Steady-State Thermal Resistance and Related Characteristics of Thermal Insulation Materials - Guarded Hot Plate Method" for transient and hot plate method thermal conductivity tests, and refer to the national standard GBJ88 - 85 "Measurement Specification for Sound Absorption Coefficient and Sound Resistance Porosity by Standing Wave Tube Method" for sound insulation ability. The test results are shown in Table 2: Table 2: Project <![CDATA[Thermal conductivity [W·(m·K) -1 > Sound absorption coefficient Example 4 0.059 0.38 Example 5 0.063 0.36 Example 6 0.056 0.39 Comparative example 1 0.066 0.38 Comparative example 2 0.121 0.22 Comparative example 3 0.094 0.24 As can be seen from Table 2, the thermal conductivity of a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material of the present invention in Examples 4-6 is lower than that of commercially available concrete exterior wall insulation blocks, and the sound absorption coefficient is higher than that of commercially available concrete exterior wall insulation blocks. This shows that the heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material of the present invention has better heat insulation and sound insulation capabilities. Comparative Examples 1-2 respectively conducted control tests on the raw materials ettringite, sodium rosinate, magnesium lignosulfonate, and modified polystyrene particles used in the present invention. The absence of ettringite, sodium rosinate, and magnesium lignosulfonate will lead to a decrease in heat insulation performance, and the impact on sound insulation performance is not obvious. However, the absence of modified polystyrene particles will lead to a significant decrease in both heat insulation and sound insulation performances. In summary, a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material prepared by the preparation method of the present invention has good heat insulation and sound insulation capabilities, and good flame retardancy, and can be widely used in the field of thermal insulation materials.

[0031] The above provides a detailed introduction to a heat-insulating, sound-insulating, lightweight, foamed, and environmentally friendly concrete material and its preparation method of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention, including the best mode, and also enables any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combination method. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and modifications can be made to the present invention without departing from the principle of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material, characterized in that: The invention comprises the following raw materials in parts by weight: 14-20 parts of modified polystyrene particles, 60-80 parts of fly ash, 100-130 parts of cement, 4.2-6 parts of polycarboxylate water reducer, 2-4 parts of sodium rosinate, 6-8 parts of ettringite, 0.4-1 parts of magnesium lignin sulfonate, and 60-80 parts of deionized water; Wherein, the modified polystyrene particles are prepared by the following steps: Step 1, 4-maleimidophenol, triethylamine and methyl cyclopentyl ether are mixed in a container, stirred evenly, and then a mixed solution of carbon tetrachloride and diethyl phosphite is added dropwise to the container under ice-water bath conditions, and then the reaction is continued under ice-water bath conditions with stirring for 4-6 hours to obtain intermediate 1; Step 2, 4-vinylbenzoyl chloride, hydroxymethyltriethoxysilane, triethylamine and methyl cyclopentyl ether are mixed in a container, stirred evenly, and reacted at a temperature of 40-60° C. for 3-4 hours to obtain intermediate 2; Step 3, mix intermediate 1, intermediate 2, and styrene in a container, stir evenly, then add benzoyl peroxide and azobisisobutyronitrile to the container, stir at room temperature for 1 hour, add sodium chloride solution and polyvinyl alcohol to the container, and raise the system temperature to 60-70°C, continue stirring for 2-3 hours, then add sodium dodecylbenzene sulfonate and n-pentane to the container, and raise the system temperature to 80-90°C, continue stirring and react for 24 hours to obtain the modified polystyrene particles.

2. The thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 1, characterized in that: The mixed solution of carbon tetrachloride and diethyl phosphite in step 1 is prepared from 0.1 mol of carbon tetrachloride and 0.08 mol of diethyl phosphite, and the sodium chloride solution used in step 3 is a sodium chloride aqueous solution with a mass fraction of 24%.

3. The thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 1, characterized in that: The amount ratio of the mixed solution of 4-maleimidophenol, triethylamine, methyl cyclopentyl ether, carbon tetrachloride and diethyl phosphite used in step 1 is 0.1 mol: 0.1-0.12 mol: 40-60 mL: 26.4 g.

4. The thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 1, characterized in that: The amount ratio of 4-vinylbenzoyl chloride, hydroxymethyltriethoxysilane, triethylamine and methyl cyclopentyl ether used in step 2 is 0.1 mol: 0.1 mol: 0.12-0.15 mol: 40-60 mL.

5. The thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 1, characterized in that: The amount ratio of intermediate 1, intermediate 2, styrene, benzoyl peroxide, azobisisobutyronitrile, sodium chloride solution, polyvinyl alcohol, sodium dodecylbenzenesulfonate and n-pentane used in step 3 is 0.06 mol: 0.06-0.08 mol: 0.1 mol: 0.4-0.64 g: 0.4-0.56 g: 18-22 mL: 0.8-1.2 g: 2.4-3 g: 3.6-4.4 g.

6. A method for preparing the thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to any one of claims 1 to 5, characterized in that: The method comprises the following preparation steps: The first step is to weigh the raw materials according to the mass proportions: 14-20 parts of modified polystyrene particles, 60-80 parts of fly ash, 100-130 parts of cement, 4.2-6 parts of water reducer, 2-4 parts of sodium rosinate, 6-8 parts of ettringite, 0.4-1 parts of lignin sulfonic acid, and 60-80 parts of deionized water; Step 2: Add cement, fly ash, sodium rosinate, ettringite and magnesium lignin sulfonate into a mixer, and mix by stirring to obtain dry concrete material; Step 3: Mix the polycarboxylate water reducer and deionized water in a container, and add the dry concrete material obtained in the second step into the container and stir and mix to obtain a prefabricated slurry; The fourth step is to pour the prefabricated slurry obtained in the third step into a container filled with modified polystyrene particles, mix evenly, and then perform molding and cover with plastic wrap to cure for 6 days, then demold and cure for another 14 days to obtain a heat-insulating, sound-insulating, lightweight, and environmentally friendly foamed concrete material.

7. The method for preparing a thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 6, characterized in that: In the second step, the stirring speed condition is 200-300 rpm, and the stirring time condition is 20-40 min.

8. The method for preparing a thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 6, characterized in that: In the third step, the stirring speed condition is 150-200 rpm, and the stirring time condition is 60-90 min.

9. The method for preparing a thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 6, characterized in that: In the fourth step, the pressure condition of the compression molding is 1-2 MPa, and the time condition of the compression molding is 10-15 min.

10. The method for preparing a thermal insulation, sound insulation, lightweight foamed environmentally friendly concrete material according to claim 6, characterized in that: The curing temperature in the fourth step is 23-27°C and the curing humidity is 80-90%.