Search

CN-121758122-B - Light building sound insulation material

CN121758122BCN 121758122 BCN121758122 BCN 121758122BCN-121758122-B

Abstract

The invention discloses a lightweight building sound insulation material which is prepared from, by weight, 30-40 parts of Portland cement, 5-10 parts of metakaolin, 15-25 parts of modified expanded perlite, 8-15 parts of modified hollow glass microspheres, 10-18 parts of composite sound insulation filler, 1-3 parts of water reducer, 0.2-0.8 part of defoamer, 0.5-1.5 part of polypropylene fiber, 3-6 parts of silica fume, 0.1-0.3 part of hydroxypropyl methyl cellulose, 0.2-0.5 part of polysiloxane powder water repellent, 5-9 parts of rubber powder and 12-18 parts of water. The composite sound insulation filler is prepared by compounding graphene oxide modified vermiculite powder, nano silicon dioxide and lignocellulose, wherein the expanded perlite is modified by a silane coupling agent and styrene-butadiene rubber emulsion, and the hollow glass microspheres are coated and cured by the styrene-butadiene rubber emulsion.

Inventors

  • CHENG XIUMEI
  • SHI ZHONG
  • SONG JIE
  • WANG JIAN

Assignees

  • 安徽文达建筑工程有限公司

Dates

Publication Date
20260508
Application Date
20260303

Claims (5)

  1. 1. The lightweight building sound insulation material is characterized by being prepared from the following components, by weight, 30-40 parts of Portland cement, 5-10 parts of metakaolin, 15-25 parts of modified expanded perlite, 8-15 parts of modified hollow glass microspheres, 10-18 parts of composite sound insulation filler, 1-3 parts of water reducer, 0.2-0.8 part of defoaming agent, 0.5-1.5 part of polypropylene fiber, 3-6 parts of silica fume, 0.1-0.3 part of hydroxypropyl methyl cellulose, 0.2-0.5 part of polysiloxane powder water repellent, 5-9 parts of rubber powder and 12-18 parts of water through pretreatment, mixing, molding and maintenance; The preparation method of the modified expanded perlite comprises the steps of drying the expanded perlite for 2-3 hours at 105 ℃, cooling to room temperature, adding a silane coupling agent KH-550 ethanol solution with the mass fraction of 2-5% according to the mass ratio of the expanded perlite to the silane coupling agent KH-550 ethanol solution of 1:3-5, stirring and soaking for 30-40 min, adding a styrene-butadiene rubber emulsion with the mass fraction of 10-15% according to the mass fraction of 20-40% of the expanded perlite, performing ultrasonic dispersion for 20-30 min at the ultrasonic frequency of 20-40 kHz and the power of 100-200W, drying to constant weight at 80 ℃, and crushing and sieving with a 80-mesh sieve to obtain the modified expanded perlite; The composite sound insulation filler is formed by mixing graphene oxide modified vermiculite powder, nano silicon dioxide and lignocellulose according to a mass ratio of 3:1-2:2; The preparation method of the graphene oxide modified vermiculite powder comprises the steps of calcining the vermiculite powder at 600-700 ℃ for 2-3 hours for activation, mixing the vermiculite powder with a graphene oxide dispersion liquid according to a mass ratio of 1:3-5, wherein the mass fraction of the graphene oxide dispersion liquid is 0.3-0.8%, performing ultrasonic treatment for 40-60 minutes under the conditions of ultrasonic frequency of 20-40 kHz and power of 100-300W, then drying at 80-100 ℃ for 2-4 hours, and grinding and sieving with a 100-mesh sieve to obtain the graphene modified vermiculite powder.
  2. 2. The light building sound insulation material according to claim 1, wherein the water reducing agent is any one of a polycarboxylate water reducing agent and a naphthalene water reducing agent, and the defoaming agent is any one of an organosilicon defoaming agent and a polyether defoaming agent.
  3. 3. The lightweight building sound insulation material according to claim 1, wherein the length of the polypropylene fiber is 6-10 mm, and the particle size of the rubber powder is 40-80 meshes.
  4. 4. The light building sound insulation material according to claim 1 is characterized in that the preparation method of the modified hollow glass bead comprises the steps of drying the hollow glass bead at 80-90 ℃ for 1-2 hours, adding the dried hollow glass bead into styrene-butadiene rubber emulsion with the mass ratio of 1:4-6 and the mass ratio of 5-8%, performing ultrasonic dispersion for 15-20 minutes under the conditions of ultrasonic frequency of 20-40 kHz and power of 100-200W, adding a curing agent with the mass ratio of 0.5-1.5% of the styrene-butadiene rubber emulsion, stirring uniformly, and drying for 2-3 hours at 80-90 ℃ to obtain the modified hollow glass bead.
  5. 5. The light building sound insulation material according to claim 4, wherein the particle size of the hollow glass beads is 50-100 μm, and the curing agent is any one of ammonium persulfate and benzoyl peroxide.

Description

Light building sound insulation material Technical Field The invention relates to the field of building materials, in particular to a lightweight building sound insulation material. Background Along with the acceleration of the urban process and the improvement of the comfort level of people on living environment, the sound insulation of the building becomes a key evaluation index of green buildings and healthy buildings, and meanwhile, the demand of modern buildings on light weight is increasingly urgent, so that the structural load is reduced, and the construction efficiency is improved. The building sound insulation materials commonly used in the market at present are mainly classified into light materials such as aerated concrete, glass wool, rock wool and the like, the density of the materials is small, but the sound insulation performance is poor, especially the sound insulation amount for low-frequency noise (125-500 Hz) is generally lower than 30dB, the sound insulation standard of civil buildings is difficult to meet, meanwhile, the defects of strong water absorption, easy aging, poor environmental protection and the like exist, the high-density sound insulation materials such as solid bricks, sound insulation mortar and the like, the sound insulation amount can reach more than 40dB, the larger the surface density of the materials is, the higher the sound insulation amount is, but the high-performance sound insulation wall or floor is often very thick and heavy, the lightweight design of the building structure is not facilitated, and the building load and the cost are increased. Meanwhile, part of organic foam materials can generate toxic gas during combustion, and harmful substances can be released during production or installation, so that the health of human bodies and the environmental safety are affected. In addition, most sound insulation materials mainly focus on sound insulation, and have defects in other properties such as heat preservation and fire prevention. Therefore, it is highly desirable to provide a building soundproof material which has light weight, high efficiency broadband soundproof and excellent mechanical properties. Disclosure of Invention The invention aims to solve the problems that the prior building sound insulation material mentioned in the background art is difficult to achieve both light weight and high-efficiency sound insulation, and meanwhile, partial materials have insufficient mechanical properties, poor environmental protection and the like. The invention provides a lightweight building sound insulation material which is prepared from the following components, by weight, 30-40 parts of Portland cement, 5-10 parts of metakaolin, 15-25 parts of modified expanded perlite, 8-15 parts of modified hollow glass beads, 10-18 parts of composite sound insulation filler, 1-3 parts of water reducer, 0.2-0.8 part of defoaming agent, 0.5-1.5 part of polypropylene fiber, 3-6 parts of silica fume, 0.1-0.3 part of hydroxypropyl methyl cellulose, 0.2-0.5 part of polysiloxane powder water repellent, 5-9 parts of rubber powder and 12-18 parts of water. As a preferable technical scheme, the composite sound insulation filler is formed by mixing graphene oxide modified vermiculite powder, nano silicon dioxide and lignocellulose according to a mass ratio of 3:1-2:2. As a preferable technical scheme of the invention, the water reducer is any one of a polycarboxylate water reducer and a naphthalene water reducer, and the defoamer is any one of an organosilicon defoamer and a polyether defoamer. As a preferable technical scheme of the invention, the length of the polypropylene fiber is 6-10 mm, and the particle size of the rubber powder is 40-80 meshes. According to the preparation method, the modified expanded perlite is dried for 2-3 hours at 105 ℃, cooled to room temperature, silane coupling agent KH-550 ethanol solution with the mass fraction of 2-5% is added according to the mass ratio of the expanded perlite to the silane coupling agent KH-550 ethanol solution of 1:3-5, stirred and soaked for 30-40 minutes, styrene-butadiene rubber emulsion with the mass fraction of 10-15% is added according to the mass fraction of 20-40% of the expanded perlite, the mixture is subjected to ultrasonic dispersion for 20-30 minutes at the ultrasonic frequency of 20-40 kHz and the power of 100-200W, and then dried to constant weight at 80 ℃, and crushed and screened through a 80-mesh sieve, so that the modified expanded perlite is obtained. According to the preparation method, after the hollow glass beads are dried at 80-90 ℃ for 1-2 hours, the dried hollow glass beads are added into styrene-butadiene rubber emulsion with the mass fraction of 5-8% according to the mass ratio of 1:4-6, ultrasonic dispersion is carried out for 15-20 min under the conditions of the ultrasonic frequency of 20-40 kHz and the power of 100-200W, then curing agent with the mass of 0.5-1.5% of the styrene-butadiene rubber emul