A cement precast element of a multi-layer composite structure

Abstract

The utility model discloses a cement prefabricated component of multilayer composite structure relates to prefabricated concrete technical field, including precomponent body, and precomponent body includes internal sound insulation layer, intermediate prestressed layer and high strength outer layer, and internal sound insulation layer is the combination of sound absorption foam and light weight concrete, and light weight concrete is wrapped in the periphery of sound absorption foam, and intermediate prestressed layer includes a plurality of prestressed reinforcement, and the periphery of internal sound insulation layer is surrounded to prestressed reinforcement. The utility model provides excellent sound insulation performance through the combination of sound absorption foam and light weight concrete, guarantees the stability of structure simultaneously, and the intermediate prestressed layer forms the powerful three -dimensional stress network through the design of the "mouth" character shape steel frame and the enhancement vertical rib, improves tensile strength, bearing capacity and durability, and high strength outer layer adopts polyurethane waterproof coating, blocks moisture penetration and protects concrete from impact, and high strength concrete and anchoring connection provide excellent compression resistance and impact resistance.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete technology, and in particular to a multi-layer composite precast cement component. Background Technology

[0002] Precast concrete components, also known as precast concrete components, are building components manufactured in factories using materials such as formwork, steel bars, and concrete. Through processes such as pouring, vibration, and curing, they meet various design requirements. These components are then transported to the construction site for assembly and installation. Compared with traditional cast-in-place concrete structures, precast concrete components have higher production efficiency, lower costs, and better quality control.

[0003] Currently, precast cement components typically lack effective sound insulation design, failing to combine sound absorption and insulation functions. This results in poor acoustic isolation of walls or floors, failing to effectively reduce noise pollution. Their structural stability relies heavily on the material's strength, leading to cracks and deformation under long-term loads, affecting durability. The impact and compressive strength of traditional components often depend on the strength of the cement, lacking specific design to cope with external impacts and vibrations, resulting in surface cracks or structural damage. Therefore, this invention proposes a multi-layered composite precast cement component to address the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-layered composite precast cement component.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-layer composite precast cement component includes a precast component body, which comprises an inner sound insulation layer, an intermediate prestressed layer, and a high-strength outer layer. The inner sound insulation layer is a combination of sound-absorbing foam and lightweight concrete, with the lightweight concrete surrounding the sound-absorbing foam. The intermediate prestressed layer includes a plurality of prestressed steel bars, which surround the inner sound insulation layer and are provided with a plurality of reinforcing vertical bars penetrating the inner sound insulation layer. The high-strength outer layer is high-strength cement concrete, and a waterproof coating is provided on the outer surface of the high-strength outer layer.

[0007] Preferably, the sound-absorbing foam is firmly bonded to the lightweight concrete by an adhesive, and the outer surface of the lightweight concrete is rough.

[0008] Preferably, the two ends of the reinforcing vertical bar are respectively tied to the upper and lower prestressed steel bars, and the lightweight concrete is uniformly provided with through holes corresponding to the reinforcing vertical bar.

[0009] Preferably, the prestressed steel bars are tightly bound in a "square" shape around the periphery of the lightweight concrete of the internal sound insulation layer.

[0010] Preferably, the prestressed steel bars and the high-strength outer layer are connected by anchoring, and the outer cement concrete is cast to cover the periphery of the intermediate prestressed steel bars.

[0011] Preferably, the waterproof coating is a polyurethane coating, and a dense waterproof chemical coating is formed on the high-strength outer layer by a multi-layer coating method.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The sound-absorbing foam of the present utility model absorbs sound wave energy through a porous structure to reduce sound wave reflection. The lightweight concrete provides rigid support and further scatters residual sound waves, while protecting the sound-absorbing foam from mechanical damage. The lightweight concrete wraps the sound-absorbing foam and is firmly connected thereto through an adhesive, and its rough outer surface enhances the adhesion with the intermediate layer, ensuring the compactness of the overall structure;

[0014] 2. The prestressed steel bars of the present utility model form a "square"-shaped main frame, and the reinforcing vertical bars penetrate through the sound insulation layer and are bound and connected with the upper and lower steel bars, so as to comprehensively improve the axial tensile strength, vertical bearing capacity and shear resistance. The through holes in the lightweight concrete ensure the precise positioning of the vertical bars, and the prestress design counteracts the tensile stress generated by external loads, significantly improving crack resistance and durability. Brief Description of the Drawings

[0015] Figure 1 is a schematic structural view of a precast cement member with a multilayer composite structure proposed by the present utility model;

[0016] Figure 2 is a schematic side sectional structural view of the precast cement member with a multilayer composite structure proposed by the present utility model.

[0017] In the drawings: 1. Precast member body; 2. Internal sound insulation layer; 3. Intermediate prestressed layer; 4. Prestressed steel bar; 5. Reinforcing vertical bar; 6. High-strength outer layer; 7. Waterproof coating. Detailed Description of the Embodiments

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them.

[0019] Refer to Figure 1-2, a precast cement component with a multilayer composite structure, comprising a precast component body 1. The precast component body 1 includes an inner sound insulation layer 2, an intermediate prestressed layer 3 and a high-strength outer layer 6. The inner sound insulation layer 2 is a combination of sound-absorbing foam and lightweight concrete, the lightweight concrete wraps around the periphery of the sound-absorbing foam, the sound-absorbing foam and the lightweight concrete are firmly connected by an adhesive, and the outer surface of the lightweight concrete is rough. The inner sound insulation layer 2 is formed by compositing sound-absorbing foam and lightweight concrete, the lightweight concrete wraps the sound-absorbing foam and is firmly connected thereto by an adhesive. The sound-absorbing foam absorbs sound wave energy through a porous structure to reduce sound wave reflection, while the lightweight concrete provides rigid support. Its rough outer surface enhances the adhesion with the intermediate layer and further scatters residual sound waves at the same time. This combination gives consideration to both sound absorption and sound insulation functions, and the wrapping structure of the lightweight concrete can also protect the sound-absorbing foam from mechanical damage;

[0020] The intermediate prestressed layer 3 comprises a plurality of prestressed steel bars 4. The prestressed steel bars 4 surround the periphery of the inner sound insulation layer 2, and a plurality of reinforcing vertical bars 5 penetrating through the inner sound insulation layer 2 are arranged on the prestressed steel bars 4. Two ends of each reinforcing vertical bar 5 are respectively bound and connected with the prestressed steel bars 4 on the upper and lower sides. Through holes corresponding to the reinforcing vertical bars 5 are uniformly formed in the lightweight concrete. The prestressed steel bars 4 are tightly bound in a "square" shape around the periphery of the lightweight concrete of the inner sound insulation layer. The prestressed layer adopts the "square"-shaped prestressed steel bars 4 as a main frame, and is bound and connected with the upper and lower steel bars through the reinforcing vertical bars 5 penetrating through the sound insulation layer. The prestressed steel bars 4 provide axial tensile strength, while the vertical bars enhance the vertical bearing capacity and shear resistance of the overall structure. The through holes in the lightweight concrete ensure accurate positioning of the vertical bars to form a three-dimensional force-bearing network. This design offsets the tensile stress generated by external loads through pre-compressive stress, and significantly improves the crack resistance and durability of the component;

[0021] The high-strength outer layer 6 is made of high-strength cement concrete, a waterproof coating 7 is arranged on the outer surface of the high-strength outer layer 6, the prestressed steel bars 4 and the high-strength outer layer 6 are connected by anchoring, and the outer cement concrete is cast to wrap the periphery of the intermediate prestressed steel bars 4. The waterproof coating 7 is a polyurethane coating, which is formed into a dense waterproof chemical coating on the high-strength outer layer 6 by a multi-layer coating method. The high-strength outer layer 6 is cast from high-grade cement concrete, wraps the prestressed steel bars 4 and forms an integral body through anchoring connection. The external polyurethane waterproof coating 7 adopts a multi-layer coating process to form a dense chemical barrier to block moisture penetration. The polyurethane material has both elasticity and weather resistance, can adapt to the deformation of micro-cracks in concrete, and maintain waterproof performance for a long time. The high-strength property of the outer layer ensures the compression resistance and impact resistance of the component.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-layered composite precast cement component, characterized in that, Comprising a prefabricated member body (1), the prefabricated member body (1) includes an internal sound insulation layer (2), an intermediate prestressed layer (3) and a high-strength outer layer (6). The internal sound insulation layer (2) is a combination of sound-absorbing foam and lightweight concrete, and the lightweight concrete wraps around the periphery of the sound-absorbing foam. The intermediate prestressed layer (3) includes a plurality of prestressed steel bars (4), the prestressed steel bars (4) surround the periphery of the internal sound insulation layer (2), and the prestressed steel bars (4) are provided with a plurality of vertical reinforcing ribs (5) penetrating through the internal sound insulation layer (2). The high-strength outer layer (6) is high-strength cement concrete, and the outer surface of the high-strength outer layer (6) is provided with a waterproof coating (7).

2. The precast cement component with a multi-layer composite structure according to claim 1, characterized in that, The sound-absorbing foam and the lightweight concrete are firmly connected by an adhesive, and the outer surface of the lightweight concrete is rough.

3. The precast cement component with a multi-layer composite structure according to claim 1, characterized in that, Both ends of the vertical reinforcing rib (5) are respectively tied and connected to the prestressed steel bars (4) on the upper and lower sides, and through holes corresponding to the vertical reinforcing ribs (5) are uniformly opened on the lightweight concrete.

4. The precast cement component with a multi-layer composite structure according to claim 1, characterized in that, The prestressed steel bars (4) are tightly bound in a rectangular shape around the periphery of the lightweight concrete of the internal sound insulation layer (2).

5. The precast cement component with a multi-layer composite structure according to claim 1, characterized in that, The prestressed steel bars (4) and the high-strength outer layer (6) are connected by anchoring, and the outer cement concrete is cast to wrap around the periphery of the intermediate prestressed steel bars (4).

6. The precast cement component with a multi-layer composite structure according to claim 1, characterized in that, The waterproof coating (7) is a polyurethane coating, which forms a dense waterproof chemical coating on the high-strength outer layer (6) by a multi-layer coating method.

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