CN115977267A - A kind of leveling and preparation method of elastic sound insulation floor - Google Patents

Abstract

The invention discloses a leveling and preparation method of an elastic sound insulation floor slab, which comprises the following steps: (S1) laser scanning is adopted for a floor slab to obtain the height difference and distribution of the floor slab, modeling is carried out on a computer, and gridding arrangement is carried out; (S2) carrying out gridding equal division on the floor slab, and arranging damping springs on the floor slab; (S3) leveling a floor slab by using the graphene elastic sound insulation mortar to form a graphene elastic sound insulation mortar layer; (S4) spraying an interface agent on the graphene elastic sound insulation mortar layer to form an interface layer; (S5) paving an elastic sound insulation coating with the thickness of 1-6 mm on the interface layer. According to the method, the functions of grid division and height scaling are realized through the damping springs, the problem of quality control of the leveling layer is effectively solved, and the comprehensive effects of spring damping sound insulation, graphene elastic sound insulation mortar sound insulation and elastic sound insulation coating sound insulation are combined to form a floor slab efficient sound insulation system, so that the development requirement of green buildings is met.

Description

A kind of leveling and preparation method of elastic sound insulation floor

technical field

The invention belongs to the technical field of building construction, and in particular relates to a leveling and preparation method of an elastic sound-insulating floor.

Background technique

In recent years, the problem of floor sound insulation has affected people's rest and health, and at the same time brought unnecessary and tense neighborhood relations. With the development of green buildings, schools, hospitals, nursing homes, health care centers and confinement centers have put forward higher requirements for floor sound insulation. The new "Green Building Evaluation Standard" GB/T 50378-2019 includes floor sound insulation as a strong bar, and the development of new floor sound insulation methods based on this is an urgent problem to be solved.

At present, three kinds of floor sound insulation measures are widely used: sound insulation mortar, sound insulation coating, and sound insulation pad. The thickness of the floor sound insulation mortar used alone is generally 3 to 5 cm, which occupies the floor space and is not conducive to popularization and utilization. At present, the sound insulation coatings on the market are usually designed to be 1 to 5mm, and the height difference of the floor is often in the range of 5mm to 30mm, or even larger, and the single use of sound insulation coatings cannot achieve a good sound insulation effect; The thickness of the pad is usually 5-10mm, the effect is good, and it is widely used abroad. However, due to its high price and complex construction process, it is rarely used in China.

The disadvantages in the prior art are: 1. No sound insulation; 2. Poor flatness, requiring leveling; 3. Not meeting the requirements of green building and green construction.

Contents of the invention

The purpose of the present invention is to provide a leveling and preparation method for an elastic sound-insulating floor. The method realizes grid division and height sizing functions through damping springs, effectively solves the problem of leveling layer quality control, and combines spring damping sound insulation and graphene elasticity. The sound insulation of the sound insulation mortar and the sound insulation of the elastic sound insulation coating are combined to form a high-efficiency sound insulation system for the floor, which meets the development requirements of green buildings.

The above object of the present invention can be achieved through the following technical solutions: a method for leveling and preparing an elastic sound-insulating floor, comprising the following steps:

(S1) Use laser scanning to obtain the height difference and distribution of the floor, model it on the computer and arrange it in a grid;

(S2) dividing the floor into grids, and arranging damping springs on the floor;

(S3) Using graphene elastic sound insulation mortar to level the floor to form graphene elastic sound insulation mortar layer;

(S4) Spraying interface agent on graphene elastic sound insulation mortar layer, forms interface layer;

(S5) Laying a 1-6 mm thick elastic sound-insulating coating on the interface layer.

Aiming at complex problems such as difficulty in floor leveling, poor construction quality, and poor sound insulation performance of the floor, the present invention realizes grid division and height sizing functions by arranging damping springs, and effectively solves the quality control problem of the leveling layer; combined with spring damping sound insulation, graphene The sound insulation of the elastic sound insulation mortar and the sound insulation of the elastic sound insulation coating are combined to form a high-efficiency sound insulation system for the floor, which meets the development requirements of green buildings. By arranging damping springs, graphene elastic sound insulation mortar and laying elastic sound insulation coatings, an integrated floor sound insulation elastic coating system is constructed.

In the leveling and preparation method of the above-mentioned elastic sound insulation floor:

Preferably, in the step (S1), laser scanning is used to obtain the height difference and distribution of the floor, and the modeling is carried out on a computer and the grid layout is carried out, replacing traditional construction points.

Preferably, when modeling on the computer in step (S1), the three-dimensional model of the thickness of the sound insulation layer and the flatness of the floor is established by using Revit software.

Preferably, in the step (S2), the floor slab is divided into grids according to 300mm×300mm˜n×300mm×n×300nmm, wherein n=2,3.

Preferably, the floor slab mentioned in the present invention generally refers to the cement floor of the unfinished room where only cement is laid, preferably the cement floor that has been leveled.

Preferably, in step (S2), the damping spring is arranged at the junction of adjacent grids.

Preferably, the damping spring in the present invention is in the shape of a circular platform, with a lower diameter Φ of 40-75 mm and an upper diameter Φ of 30-60 mm, and the height direction can be adjusted by pulling and compressing.

The damping spring has three functions of positioning, meshing and damping.

Preferably, the graphene elastic mortar described in the step (S3) is mainly composed of cement, graphene, regenerated sand, regenerated rubber powder, acrylic acid emulsion, cellulose, sepiolite fiber or polypropylene fiber, cement blowing agent and water .

Preferably, the dosage relationship of the cement, graphene, quartz sand, regenerated rubber powder, polymer emulsion, cellulose and sepiolite fiber or polypropylene fiber is that 300-400kg of cement is contained in the graphene elastic mortar per ^m3 , Graphene 0.2~0.5kg, reclaimed sand 0~150kg, regenerated rubber powder 150~300kg, acrylic emulsion 1~5kg, cellulose 1~5kg, sepiolite fiber 1~3kg or polypropylene fiber 0.5~1.5kg, cement hair Foam agent 0.4-0.6kg, water 120-168kg.

The raw materials of the pre-mixed graphene elastic mortar are mixed with water to prepare a light slurry, which is transported on the floor with a screw pump, and then leveled with a spatula so that the surface is just flush with the upper surface of the damping spring.

Preferably, the cement is PII42.5 ordinary Portland cement; the graphene is SE1231; the regenerated sand is recycled sand from waste concrete, which is fine sand with a fineness modulus of 1.8; and regenerated rubber powder with a fineness mesh number of 40 to 100 mesh is used; Commercially available acrylic emulsion; Cellulose adopts methyl cellulose (MC) and carboxymethyl cellulose (CMC); Sepiolite fiber and polypropylene fiber are commercially available; Cement foaming agent adopts ionic composite foaming agent; Water Use tap water.

Preferably, the length of the sepiolite fiber or polypropylene fiber is 3-5 mm.

Preferably, the thickness of the graphene elastic sound-insulating mortar layer in step (S3) can be adjusted arbitrarily according to the required floor adjustment degree of 5-30mm or other thicknesses.

Preferably, the interface agent in step (S4) can be an interface agent commonly used in this field, such as acrylic emulsion and the like.

Preferably, the elastic sound-insulating coating in the step (S5) is a water-based acrylic coating or a water-based polyurethane coating, and hollow glass microspheres are added to the water-based acrylic coating or the water-based polyurethane coating.

Preferably, the amount of the hollow glass microspheres per kg of water-based acrylic paint or water-based polyurethane paint is 0.01-0.05kg, and the particle size of the hollow glass microspheres is 80-200 μm. In the material, it will automatically float on the surface during construction, improving the abrasion resistance and anti-skid property of water-based acrylic coatings or water-based polyurethane coatings.

The bulk density of hollow glass microspheres is generally 300-400kg/m ³ , and the particle size is generally several microns to hundreds of microns. When it is added to the sound insulation coating, the hollow glass microspheres will float on the surface of the coating, so it can increase the water resistance. Abrasion resistance, slip resistance for acrylic or polyurethane coatings, enhanced energy dissipation mechanisms.

The present invention has the following advantages:

(1) The present invention realizes grid division and height sizing functions through damping springs, effectively solving the problem of leveling layer quality control;

(2) The present invention combines spring damping sound insulation, graphene elastic mortar sound insulation and wear-resistant elastic sound insulation coating comprehensive layer effect to form a high-efficiency sound insulation system for the floor, which meets the development requirements of green buildings;

(3) The present invention constructs an integrated floor sound insulation elastic coating system by arranging damping springs, graphene elastic mortar and laying elastic sound insulation coatings, which solves the performance requirements of green buildings for floor sound insulation.

Description of drawings

Fig. 1 is the floor sound insulation elastic coating leveling system in embodiment 1 - the damping spring arranged on the gridded floor;

Fig. 2 is the damping spring in embodiment 1.

Detailed ways

The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto. The raw materials used below are from commercial sources unless otherwise specified.

Among them, the cement adopts PⅡ42.5 ordinary portland cement; graphene (SE1231); the regenerated sand adopts waste concrete reclaimed sand, which is fine sand with a fineness modulus of 1.8; the regenerated rubber with a fineness mesh number of 40-100 mesh is used powder; commercially available acrylic emulsion; MC and CMC are used for cellulose ether; sepiolite fiber and polypropylene fiber are commercially available; cement foaming agent adopts ionic composite foaming agent; tap water is used.

Example 1

The leveling and preparation method of floor sound insulation elastic coating provided by the invention comprises the following steps:

Step 1: The floor height difference and distribution are obtained by laser scanning of the floor, and the modeling is carried out on the computer and the grid layout is carried out;

Using laser scanning to obtain the height difference and distribution of the floor, modeling and grid layout on the computer, replacing the traditional construction management;

When modeling on the computer, use Revit software to establish a three-dimensional model of the thickness of the sound insulation layer and the flatness of the floor;

Step 2: Arrange the damping springs on the floor according to the equally divided area grid of 300×300～n*300mm×n*300mm (n=2, 3), including the damping spring 2 placed on the upper surface of the floor 1, as shown in Figure 1 -2 shown;

The damping spring is in the shape of a circular platform, with a lower diameter of 40-75 mm and an upper diameter of 30-60 mm, and can adjust the height direction by pulling up and compressing.

Step 3: Use graphene elastic sound insulation mortar to level the floor;

Graphene elastic sound insulation mortar is mainly composed of cement, graphene, recycled sand, recycled rubber powder, acrylic emulsion, cellulose, sepiolite fiber or polypropylene fiber, cement foaming agent and water.

Each ^m3 graphene elastic sound insulation mortar contains 300-400kg of cement, 0.2-0.5kg of graphene, 0-150kg of reclaimed sand, 150-300kg of regenerated rubber powder, 1-5kg of acrylic emulsion, 1-5kg of cellulose, sea foam Stone fiber 1-3kg or polypropylene fiber 0.5-1.5kg, cement foaming agent 0.4-0.6kg, water 120-168kg.

The pre-mixed graphene elastic mortar is mixed with water to prepare a light slurry, which is transported on the floor with a screw pump, and then leveled with a spatula so that the surface is just flush with the upper surface of the damping spring.

Step 4: Spray interface agent;

After the leveling mortar has solidified and hardened, first soak the mop with clean water, then clean the surface of the ground without floating ash, and then use acrylic emulsion as an interface agent to paint the ground twice to seal the surface of the sound-proof mortar.

Step 5: After the interface agent is dry, add 0.01 to 0.05 kilograms of hollow glass microspheres per kilogram of water-based acrylic paint, stir it evenly with a paint mixer, then pour it on the floor, scrape it with tools, and control the thickness of the elastic sound-insulating paint. 1~6mm.

The graphene elastic mortar formula design table in the following examples 2-5 is shown in the following table 1.

Graphene elastic mortar formula in table 1 embodiment 2-5

Example cement Graphene recycled sand recycled rubber powder acrylic emulsion Cellulose Sepiolite fiber Polypropylene fibers Foaming agent water 1 300 0.2 50 150 1 MC1 0 0.5 0.6 120 2 350 0.3 150 200 1.5 MC2 1 0 0.5 145 3 380 0.4 100 220 3.0 CNC3 0 1.5 0.5 160 4 400 0.5 0 300 5.0 MC5 3 0 0.4 168

Embodiment 1～5 construction description:

The interface agent adopts 102 acrylic emulsion; elastic sound insulation coating: it is prepared by mixing 0.01-0.05 kg of hollow glass microspheres into 1 kg of water-based acrylic coating or polyurethane coating.

Example 2

Other steps are the same as in Example 1.

Laser scanning and modeling were carried out on the 120mm thick concrete floor, and then the damping spring was arranged, and the 15mm thick graphene elastic sound insulation mortar was used for leveling. The specific method is as follows:

Mix graphene elastic mortar per ^m3 according to: 300kg of cement, 0.2kg of graphene, 50kg of reclaimed sand, 150kg of regenerated rubber powder, 1kg of acrylic emulsion, 1kg of MC, 0.5kg of polypropylene fiber, and 0.6kg of cement foaming agent. Add 120kg of water to the cube and stir evenly to make it, and then carry out plastering construction.

The interface agent is 102 acrylic emulsion; elastic sound insulation coating: it is prepared by mixing 0.01 kg of hollow glass microspheres into water-based acrylic coating, and the coating is evenly coated with a thickness of 1mm.

On the reinforced concrete floor with a weighted normalized impact sound pressure level of Ln,w=78dB, after the pavement thickness is about 15mm thick graphene elastic sound insulation mortar + 1mm thick elastic sound insulation coating, the floor structure has passed the impact sound insulation test , weighted normalized impact sound pressure level Ln,w=65dB, weighted impact sound pressure level improvement △Lw=12dB. According to the floor impact sound insulation standard in GB50118-2010 "Code for Design of Civil Building Sound Insulation", the impact sound insulation performance of the floating floor slab has reached the corresponding level standards of residential buildings, school buildings and hotel buildings.

Example 3

Other steps are the same as in Example 1.

Laser scanning and modeling were carried out on the 120mm thick concrete floor, and then damping springs were arranged, and 20mm thick graphene elastic sound insulation mortar was used for leveling and leveling. The specific method is as follows:

Mix graphene elastic mortar per ^m3 according to: 350kg of cement, 0.3kg of graphene, 150kg of reclaimed sand, 200kg of regenerated rubber powder, 1.5kg of acrylic emulsion, 2kg of MC, 1kg of sepiolite fiber, and 0.5kg of cement foaming agent. Add 145kg of water per cubic meter and stir evenly to make it, then carry out plastering construction.

The interface agent is 102 acrylic emulsion; elastic sound insulation coating: it is prepared by mixing 0.02 kg of hollow glass microspheres into water-based acrylic coating, and the coating is evenly coated with a thickness of 3mm.

On the reinforced concrete floor with a weighted normalized impact sound pressure level of Ln,w=78dB, after the pavement thickness is about 20mm thick graphene sound insulation mortar + 3mm thick sound insulation coating, the floor structure has been tested for impact sound insulation, and the calculated Weighted normalized impact sound pressure level Ln,w=62dB, weighted impact sound pressure level improvement △Lw=16dB. According to the floor impact sound insulation standard in GB50118-2010 "Code for Design of Civil Building Sound Insulation", the impact sound insulation performance of the floating floor slab has reached the corresponding level standards for hospital buildings, residential buildings, school buildings and hotel buildings.

Example 4

Other steps are the same as in Example 1.

Laser scanning and modeling were carried out on the 120mm thick concrete floor, and then damping springs were arranged, and 25mm sound insulation mortar (graphene elastic mortar) was used for leveling. The specific method is as follows:

Mix graphene elastic mortar per ^m3 according to: 380kg of cement, 0.4kg of graphene, 100kg of reclaimed sand, 220kg of regenerated rubber powder, 3.0kg of acrylic emulsion, 3kg of CMC, 1.5kg of polypropylene fiber, and 0.5kg of cement foaming agent. Add 160kg of water to the cube and stir evenly to make it, then carry out plastering construction.

The interface agent is 102 acrylic emulsion; elastic sound insulation coating: it is prepared by mixing 0.03 kg of hollow glass microspheres into water-based polyurethane coating, and the coating is uniformly coated with a thickness of 4mm.

On the reinforced concrete floor with a weighted normalized impact sound pressure level of Ln,w=78dB, after the pavement thickness is about 25mm thick graphene sound insulation mortar + 4mm thick sound insulation coating, the floor structure has been tested for impact sound insulation. Weighted normalized impact sound pressure level Ln,w=59dB, weighted impact sound pressure level improvement △Lw=19dB. According to the floor impact sound insulation standard in GB50118-2010 "Code for Design of Civil Building Sound Insulation", the impact sound insulation performance of the floating floor slab has reached the corresponding level standards for hospital buildings, residential buildings, school buildings and hotel buildings.

Example 5

Other steps are the same as in Example 1.

Laser scanning and modeling were carried out on the 120mm thick concrete floor, and then the damping spring was arranged, and the 30mm thick graphene elastic sound insulation mortar was used for leveling. The specific method is as follows:

Mix graphene elastic mortar per ^m3 according to: 400kg of cement, 0.5kg of graphene, 300kg of regenerated rubber powder, 5.0kg of acrylic emulsion, 5kg of MC, 3kg of sepiolite fiber, and 0.4kg of cement foaming agent. Add 168kg per cubic meter After the water is stirred evenly, the plastering construction is carried out.

The interface agent is 102 acrylic emulsion; elastic sound insulation coating: it is prepared by mixing 0.05 kg of hollow glass microspheres into water-based polyurethane coating, and the coating is evenly coated with a thickness of 6mm.

On the reinforced concrete floor with a weighted normalized impact sound pressure level of Ln,w=78dB, after the pavement thickness is about 30mm thick graphene sound insulation mortar + 6mm thick sound insulation coating, the floor structure has been tested for impact sound insulation, and the calculated Weighted normalized impact sound pressure level Ln,w=55dB, weighted impact sound pressure level improvement △Lw=23dB. According to the floor impact sound insulation standard in GB50118-2010 "Code for Sound Insulation Design of Civil Buildings", the impact sound insulation performance of the floating floor slab has reached the corresponding grade standards for special-grade housing, hospital buildings, residential buildings, school buildings and hotel buildings.

The sound insulation effects in Examples 2-5 are shown in Table 2.

The sound insulation effect of floor slab in table 2 embodiment 2-5

Remarks: GB50118-2010 "Code for Design of Sound Insulation of Civil Buildings" impact sound insulation standard (weighted normalized impact sound pressure level Ln,w)

Residential buildings, bedroom, living room (hall) floor: <75dB; high-demand residential <65dB;

School buildings, floors between ordinary classrooms: <75dB Floors between language classrooms, reading rooms and upper rooms <65dB;

Floors between ordinary classrooms, laboratories, computer rooms and rooms that generate noise on the upper floor <65dB;

Floors between piano rooms and music classrooms <65dB;

Hospital buildings, floors between wards, operating rooms and upper rooms <65dB;

Hotel building, the floor between the guest room and the upper room special class: <55dB; first class: <65dB; second class: <75dB.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field within the technical scope disclosed in the present invention, whoever is within the spirit and principles of the present invention Any modifications, equivalent substitutions and improvements made within are covered within the protection scope of the present invention.

Claims (10)

1. A leveling and preparation method of an elastic sound insulation floor slab is characterized by comprising the following steps:

(S1) scanning a floor slab by laser to obtain the height difference and distribution of the floor slab, modeling on a computer and carrying out gridding arrangement;

(S2) carrying out gridding equal division on the floor slab, and arranging damping springs on the floor slab;

(S3) leveling a floor slab by using the graphene elastic sound insulation mortar to form a graphene elastic sound insulation mortar layer;

(S4) spraying an interface agent on the graphene elastic sound insulation mortar layer to form an interface layer;

and (S5) paving an elastic sound insulation coating with the thickness of 1-6 mm on the interface layer.

2. The method of leveling and making an elastic acoustical floor slab of claim 1, wherein: in step (S2), the floor slab is divided into equal parts of 300mm × 300mm to n × 300mm × n × 300nmm, where n =2, 3.

3. The method of leveling and making an elastic acoustical floor slab of claim 1, wherein: and (S2) arranging damping springs at the junctions of the adjacent grids on the floor slab.

4. The method of leveling and making a resilient acoustical floor slab as claimed in claim 1, wherein: in the step (S2), the damping spring is in a circular truncated cone shape, the lower diameter of the damping spring is 40-75 mm, the upper diameter of the damping spring is 30-60 mm, and the height direction can be adjusted through pulling and compressing.

5. The method of leveling and making an elastic acoustical floor slab of claim 1, wherein: the graphene elastic sound insulation mortar in the step (S3) mainly comprises cement, graphene, reclaimed sand, reclaimed rubber powder, acrylic emulsion, cellulose, sepiolite fibers or polypropylene fibers, a cement foaming agent and water.

6. The method of leveling and making an elastic acoustical floor slab of claim 5, wherein: per m ³ The graphene elastic sound insulation mortar contains 300-400 kg of cement, 0.2-0.5 kg of graphene, 0-150 kg of reclaimed sand, 150-300 kg of reclaimed rubber powder, 1-5 kg of acrylic emulsion, 1-5 kg of cellulose, 1-3 kg of sepiolite fiber or 0.5-1.5 kg of polypropylene fiber, 0.4-0.6 kg of cement foaming agent and 120-168 kg of water.

7. The method of leveling and making an elastic acoustical floor slab of claim 6, wherein: the cellulose is methyl cellulose MC or carboxymethyl cellulose CMC; the length of the sepiolite fiber or the polypropylene fiber is 3-5 mm.

8. The method of leveling and making an elastic acoustical floor slab of claim 1, wherein: in the step (S5), the elastic sound insulation coating is a water-based acrylic coating or a polyurethane coating, and hollow glass beads are added into the water-based acrylic coating or the water-based polyurethane coating.

9. The method of leveling and making an elastic acoustical floor slab of claim 8, wherein: the addition amount of the hollow glass bead in each kg of the water-based acrylic coating or the water-based polyurethane coating is 0.01-0.05 kg.

10. The method of leveling and making an elastic acoustical floor slab of claim 9, wherein: the particle size of the hollow glass bead is 80-200 mu m.

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