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CN-122013957-A - Thin floor sound insulation system and construction method

CN122013957ACN 122013957 ACN122013957 ACN 122013957ACN-122013957-A

Abstract

The invention provides a thin floor sound insulation system and a construction method, and belongs to the technical field of light sound insulation building materials. The system sequentially comprises a base layer treatment layer, an elastic cushion layer, a composite damping prefabricated plate layer, a polymer bonding layer, a light leveling layer and a finish layer from bottom to top. The composite damping prefabricated plate layer has an internal material gradient structure, continuously transits from a high damping mixture area to a scattering enhanced mixture area from bottom to top, and the polymer bonding layer is formed by flexible polymer modified cement mortar and is matched with self-activation treatment of the surface of the plate to realize interlayer chemical bridging and mechanical engagement. The invention realizes damping dissipation and sound wave scattering by utilizing the cooperation of the gradient structure, and realizes high-efficiency attenuation of wide-band impact sound under the conditions of extremely thin thickness and low load by buffering the interlayer stress through the flexible bonding layer, thereby effectively solving the contradiction between space limitation and high sound insulation requirement in the existing residential reconstruction.

Inventors

  • ZHAO SHUANG
  • ZENG XIANCHAO

Assignees

  • 湖北世宇新型建材有限公司

Dates

Publication Date
20260512
Application Date
20260226

Claims (10)

  1. 1. The thin floor sound insulation system is characterized by sequentially comprising a base treatment layer, an elastic cushion layer, a composite damping prefabricated plate layer, a polymer bonding layer, a light leveling layer and a facing layer from bottom to top; The base treatment layer is formed by cement-based interface treatment agent solidified on the surface of the floor base; the elastic cushion layer is laid above the base layer treatment layer; The composite damping precast slab layer is arranged above the elastic cushion layer and is formed by splicing composite damping precast slabs; The polymer bonding layer is arranged between the composite damping precast slab layer and the light leveling layer and is formed by curing flexible polymer modified cement mortar; the light leveling layer is arranged above the polymer bonding layer and is formed by solidifying gypsum-based self-leveling mortar.
  2. 2. The thin flooring sound insulation system of claim 1, wherein the composite damping pre-sheet has a total thickness of 10 to 15mm, comprising a lower layer, a core layer and an upper layer from bottom to top; the lower layer comprises cement serving as hydraulic cementing material, waste rubber particles serving as elastic damping components, redispersible latex powder serving as film-forming binding components and damping plate additives; the core layer is in a continuously gradual transition from a high damping mixture region near the lower layer to a scattering enhanced mixture region near the upper layer; the upper layer is composed of a cement-based material with a surface mechanically roughened and coated with a silane-based interfacial activator.
  3. 3. The thin floor sound insulation system of claim 2, wherein the core layer is comprised of a high damping blend and a scattering enhancing blend, each comprising waste rubber particles and closed cell vitrified microbeads; the waste rubber particles in the high-damping mixture account for 30 to 50 percent of the total volume of the aggregate, and the closed-cell vitrified microbeads account for 5 to 20 percent of the total volume of the aggregate; The closed-cell vitrified microbeads in the scattering enhancement mixture account for 20 to 30 percent of the total volume of the aggregate, and the waste rubber particles account for 10 to 20 percent of the total volume of the aggregate.
  4. 4. The thin floor sound insulation system of claim 2, wherein the silane-based interface activator is gamma-aminopropyl triethoxysilane, and the damping sheet material additive comprises polypropylene fibers and hydroxypropyl methylcellulose ether.
  5. 5. The low profile flooring sound insulation system of claim 1, wherein the polymer bonding layer is formed from a flexible polymer modified cement mortar.
  6. 6. The low profile flooring sound insulation system of claim 1, wherein the resilient cushion layer is a polyurethane sound insulation pad.
  7. 7. The low profile flooring sound insulation system of claim 1, wherein the facing layer is a wood floor or a polyvinyl chloride roll.
  8. 8. A construction method based on the thin type floor sound insulation system according to any one of claims 1 to 7, characterized by comprising the steps of: m1, cleaning and interface treatment are carried out on a floor base layer, and a polyurethane sound insulation pad is paved to form a base layer treatment layer and an elastic cushion layer; M2, dry-laying the composite damping precast slab above the elastic cushion layer in a tongue-and-groove splicing mode to form a composite damping precast slab layer; m3, coating flexible polymer modified cement mortar on the surface of the composite damping precast slab layer to form a polymer bonding layer; m4, pouring gypsum-based self-leveling mortar on the surface of the polymer bonding layer to form a light leveling layer; and M5, curing the light leveling layer, and paving facing materials on the surface of the light leveling layer.
  9. 9. The method of claim 8, wherein the composite damping prefabricated panel in step M2 is prepared by: s1, preparing lower layer slurry, high damping mixture, scattering enhancement mixture and upper layer slurry; S2, paving the lower layer slurry at the bottom of a forming die, and simultaneously arranging the high-damping mixture and the scattering enhancement mixture above the lower layer slurry through a separation cloth process to obtain a combined primary blank; s3, applying mechanical vibration and static pressure to the combined primary blank to obtain a plate semi-finished product main body with a tongue-and-groove structure; s4, spraying an interface agent on the upper surface of the core layer of the plate semi-finished product main body and pouring upper layer slurry to obtain a complete plate wet blank; S5, curing the wet blank of the complete board to obtain a cured board; and S6, carrying out mechanical roughening and chemical activation treatment on the surface of the upper layer of the solidified plate to obtain the composite damping precast plate.
  10. 10. The method of claim 9, wherein the mechanical roughening depth in step S6 is controlled to be 0.5 to 1.0mm, and the chemical activation treatment is spraying a γ -aminopropyl triethoxysilane solution.

Description

Thin floor sound insulation system and construction method Technical Field The invention belongs to the technical field of light sound-insulation building materials, and particularly relates to a thin floor sound-insulation system and a construction method. Background In modern residential buildings, floor sound insulation is an important indicator for quality of residence. The design of the existing high-performance sound insulation leveling system generally follows the mass law and the double-layer vibration isolation theory, namely, the higher sound insulation amount is obtained by increasing the surface density and the thickness of the floor slab structure. For example, conventional concrete-based floatation systems typically require a relatively thick fine stone concrete or gypsum-based self-leveling layer to be laid as the upper mass, often up to 80 to 120mm in total thickness, with a significant face load increase. Although the technical path with increased thickness can meet the acoustic standard, in the existing new projects with building transformation or limited floor height, the problems of insufficient indoor clear height, exceeding the load limit value of the original structure, overlong construction period and the like are often caused. In order to adapt to space and load limited situations, prior art attempts have been made to use thin composite systems, such as using thin elastomeric mats in combination with prefabricated panels such as fiber cement boards, with the addition of thin leveling materials. However, such systems have obvious performance limitations in practical applications, namely, on one hand, due to the total thickness, the simple thinned uniform material members are difficult to provide enough low-frequency vibration isolation efficiency and sound energy dissipation capacity, so that the isolation effect on low-frequency impact sounds such as footstep sounds is not ideal, and on the other hand, due to the difference of material properties (such as elastic modulus and drying shrinkage) between the prefabricated plate layers and the upper leveling layers, the rigid stacked structure is extremely easy to generate microcracks, hollows and even stripping at the interlayer interfaces under long-term use or temperature and humidity changes. This not only destroys the structural integrity of the ground but also creates an acoustic bridge due to poor interface contact, further degrading sound damping performance. Therefore, how to achieve excellent wide-band impact sound isolation effect and ensure long-term combination stability of internal structural layers of the system under the premise of strictly limiting the total thickness and the surface load of the system is a main common technical challenge facing the current floor sound insulation technical field. Disclosure of Invention The invention overcomes the defects of the prior art and provides a thin floor sound insulation system and a construction method. In order to achieve the aim, the invention adopts the technical scheme that the thin floor sound insulation system comprises a base treatment layer, an elastic cushion layer, a composite damping prefabricated plate layer, a polymer bonding layer, a light leveling layer and a facing layer from bottom to top in sequence; The base treatment layer is formed by cement-based interface treatment agent solidified on the surface of the floor base; the elastic cushion layer is paved above the base layer treatment layer; the composite damping precast slab layer is arranged above the elastic cushion layer and is formed by splicing composite damping precast slabs; The polymer bonding layer is arranged between the composite damping precast slab layer and the light leveling layer and is formed by curing flexible polymer modified cement mortar. The light leveling layer is arranged above the polymer bonding layer and is formed by solidifying gypsum-based self-leveling mortar. Preferably, the total thickness of the composite damping precast slab is 10 to 15mm, and the composite damping precast slab comprises a lower layer, a core layer and an upper layer from bottom to top; the lower layer comprises cement as hydraulic cementing material, waste rubber particles as elastic damping component, redispersible latex powder as film-forming binding component and damping plate additive; The core layer is in continuous gradual transition from a high damping mixture area near the lower layer to a scattering enhancement mixture area near the upper layer; the upper layer is composed of a cement-based material with a surface mechanically roughened and coated with a silane-based interfacial activator. Preferably, the core layer is composed of a high damping blend and a scatter enhancing blend, both comprising discarded rubber particles and closed cell vitrified microbeads. Preferably, the waste rubber particles in the high damping mixture account for 30 to 50 percent of the total volume of the aggregate, and t