CN111550001A - Light gypsum-based self-leveling floor ground heat-insulation sound-insulation structure and construction method thereof - Google Patents
Light gypsum-based self-leveling floor ground heat-insulation sound-insulation structure and construction method thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/181—Insulating layers integrally formed with the flooring or the flooring elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/182—Underlayers coated with adhesive or mortar to receive the flooring
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
- E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention relates to a light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure and a construction method thereof, wherein the heat-insulating and sound-insulating structure comprises an anti-cracking protective layer, a light steel plate layer, a light gypsum heat-insulating layer and a finish coat which are sequentially paved on a floor slab from bottom to top; the light steel plate layer is formed by tiling a plurality of light steel plates and fixedly mounting the light steel plates on the anti-cracking protective layer, each light steel plate is provided with one or more raised ribs penetrating through the whole steel plate, and a hollow column with a triangular, square, rectangular, arched or semicircular cross section penetrating through the whole steel plate is formed between each raised rib and the anti-cracking protective layer. The invention provides a novel floor structure, wherein a light steel plate layer with raised ribs is laid in a floor layer, air is reserved in gaps of the lower layer of the raised ribs, the structure can achieve better heat preservation and heat insulation effects due to low heat conductivity coefficient of the air, and vitrified micro bubbles are doped to replace standard sand, so that the heat preservation performance of mortar is improved, the volume weight is reduced, and the sound insulation effect is achieved.
Description
Technical Field
The invention belongs to the crossing field of building material technology and floor structure design, and relates to a light gypsum-based self-leveling ground heat-insulation sound-insulation structure and a construction method thereof.
Background
As a phosphorus resource rich province in Hubei province, the accumulated stockpiling quantity of the industrial waste phosphogypsum is estimated to exceed 25000 ten thousand tons, the annual output exceeds 2500 ten thousand tons, the annual consumption is less than 300 ten thousand tons, the amount of the phosphogypsum produced per year is far from the comprehensive utilization amount, and the stockpiling measures are mainly adopted at present, so that the environmental and ecological influences are large. The phosphogypsum industrial waste is utilized to produce nontoxic and harmless building materials and the like, so that the industrial waste can be utilized, and the pollution of the industrial waste to the environment can be reduced.
From the perspective of the floor surface heat insulation structure, the traditional building method of the floor surface is to pour fine stone concrete, and because the concrete has a large volume weight, the process increases the dead weight of the floor surface, increases the load of the floor surface, is not beneficial to structural earthquake resistance, and meanwhile, the fine stone concrete has poor heat insulation and sound insulation effects and subsequently needs mortar leveling layer construction. With the continuous improvement of the building energy-saving requirement, the development of heat-insulating materials is rapidly advanced, but the research on mortar with light heat insulation is less.
Chinese patent CN 206844573 introduces a building ground heat-insulating sound-insulating structure, which introduces a building ground structure with heat-insulating property and sound-insulating effect meeting the related evaluation requirements of green buildings, but has more construction surface layers, complex process and heavy volume which can not achieve the light effect. Chinese patent CN 108661290 provides a floor heat-insulating sound-insulating board and a processing method thereof, the patent utilizes lightweight aggregate concrete to be cured into a convex bracket, and organic polymer materials are filled in the convex bracket to form a heat-insulating sound-insulating layer on the surface of the bracket, but the curing of the concrete needs time, and the field construction period is longer. The invention provides a light heat-insulating floor structure by designing and modifying the floor structure and effectively utilizing industrial waste gypsum.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a light gypsum-based self-leveling floor ground heat-insulation and sound-insulation structure with convenient construction, good performance and low cost and a construction method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
a light gypsum-based self-leveling floor ground heat and sound insulation structure comprises an anti-cracking protective layer, a light steel plate layer, a light gypsum heat insulation layer and a finish coat which are sequentially paved on a floor from bottom to top;
the anti-cracking protective layer consists of a steel wire mesh framework and plastering mortar filled between the steel wire mesh framework and the floor slab;
the light steel plate layer is obtained by tiling and fixedly mounting a plurality of light steel plates on the anti-cracking protective layer, each light steel plate is provided with one or more raised ribs penetrating through the whole steel plate, and a hollow column with a triangular, square, rectangular, arched or semicircular cross section penetrating through the whole steel plate is formed between each raised rib and the anti-cracking protective layer;
the light gypsum heat-insulating layer is prepared from raw materials of a cementing material, aggregate, a retarder, a water reducing agent and water, wherein the cementing material comprises the following components in percentage by mass: 70-85% of alpha-type high-strength gypsum, 5-10% of ordinary portland cement and 10-20% of superfine mineral powder; the aggregate is obtained by partially replacing standard sand with vitrified micro bubbles, the proportion of the vitrified micro bubbles in the aggregate replacing the standard sand is 60-100 wt%, and the mass ratio of the cementing material to the aggregate is 4-10: 1. Mixing the solid phase components in proportion, adding a proper amount of water, mixing (the water-material ratio is 1: 0.30-1: 0.45) to obtain the light gypsum heat-insulating mortar, and curing to obtain the light gypsum heat-insulating layer. The obtained light gypsum thermal insulation mortar has a self-leveling effect, the initial fluidity is 190-220mm, and the fluidity loss in 30min is less than 3 mm.
According to the scheme, the thickness of the anti-cracking protective layer is 5-10 mm.
Preferably, the thickness of the light steel plate is 3-7 mm, the height of the raised ribs on the light steel plate is 20-25 mm, the interval between the highest points of adjacent raised ribs on the light steel plate layer is 80-120 mm, and the interval between adjacent light steel plates is 2-10 mm; the smooth part of the edge of the light steel plate is provided with a mounting hole and is fixedly mounted on the anti-cracking protective layer through a bolt.
Preferably, the length of the light steel plate is 1000-1200 mm, and the width of the light steel plate is 600-1000 mm.
Preferably, the cross section of the hollow column formed between the raised rib of the light steel plate and the anti-cracking protective layer is triangular. The triangular hollow column is stronger in stability and firmer in overall structure.
Preferably, the hollow column between the raised rib and the anti-cracking protective layer of the light steel plate is internally provided with sound-deadening cotton.
According to the scheme, the α type high-strength gypsum is obtained by the normal pressure hydrothermal reaction of industrial phosphogypsum, and the main chemical component is CaSO4·0.5H2O, absolute dry compressive strength of 20-30 MPa.
According to the scheme, the retarder is a protein retarder or a citric acid retarder, and the addition amount of the retarder is 0.05-0.15% of the mass of the gel material.
According to the scheme, the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent, and the adding amount of the water reducing agent is 0.3-0.5% of the mass of the gel material.
According to the scheme, the standard sand is the Chinese ISO standard sand, and SiO in the standard sand2The content is more than 96 percent, the ignition loss is less than 0.40 percent, and the mud content is less than 0.20 percent.
According to the scheme, the vitrified micro bubbles have the particle size of 0.5-1.5 mm and the volume weight of 50-80 kg/m3And the thermal conductivity is 0.044-0.048W/(m.K).
According to the scheme, the flexural strength of the light gypsum heat-insulating layer is 2.9-5.8 MPa, the compressive strength is 11.3-28.9 MPa, and the volume weight is 1100-1700 kg/m3The thermal conductivity is 0.38-0.65W/(mK).
Preferably, the light gypsum heat-insulating layer covers the light steel plate layer and is 5-10 mm higher than the highest point of the light steel plate. The thickness of the light gypsum heat-insulating layer is 20-35 mm.
According to the scheme, the decorative layer is a floor tile, a wood floor or granite.
According to the scheme, the whole thickness of the light gypsum-based self-leveling floor ground heat-insulation and sound-insulation structure is less than or equal to 60 mm.
The invention also comprises a construction method of the light gypsum-based self-leveling floor ground heat-insulation and sound-insulation structure, which comprises the following steps:
1) laying a steel wire mesh framework, pouring plastering mortar to fill the steel wire mesh framework and combining with the concrete floor into a whole to form an anti-crack protective layer;
2) paving and fixedly mounting a plurality of light steel plates on the anti-cracking protective layer through bolts, and reserving a gap of 2-3 mm between every two adjacent light steel plates to obtain a light steel plate layer;
3) preparing light gypsum heat-insulating mortar according to the raw material proportion of the light gypsum heat-insulating layer, controlling the elevation, and pouring the light gypsum heat-insulating mortar on a light steel plate layer to prepare the light gypsum heat-insulating layer;
4) and paving a decorative surface layer on the light gypsum heat-insulating layer to obtain the light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure.
According to the scheme, the method also comprises the step of arranging silencing cotton in the hollow column formed between the raised rib of the light steel plate and the anti-cracking protective layer. The sound-absorbing cotton can better enhance the heat preservation and sound insulation effects of the structure.
A certain gap is formed below the raised rib of the light steel plate, wherein the gap is mainly filled with air, and the design better enhances the heat preservation and sound insulation effects of the floor because the air heat conductivity coefficient is 0.0613-0.0837W/(m.K) and the heat conductivity coefficient is low; the light gypsum heat-insulating layer laid on the upper layer takes alpha-type high-strength gypsum as a raw material, the water resistance of the material is improved by using ordinary portland cement and superfine mineral powder, the fluidity of the alpha-gypsum-based self-leveling material is improved by adding a water reducing agent, the high-performance high-flow-state gypsum-based self-leveling mortar is prepared, and the vitrified micro-beads are used for partially or completely replacing standard sand to optimize the heat-insulating property of the gypsum-based self-leveling mortar and reduce the volume weight.
The invention has the beneficial effects that: 1) the invention provides a novel floor structure.A light steel plate layer with raised ribs is laid in a floor layer, air can be left in gaps of the lower layer of the raised ribs, the structure can play a better heat preservation and heat insulation effect due to the low heat conductivity coefficient of the air, and vitrified micro bubbles are doped to replace standard sand, so that the heat preservation performance of mortar is improved, the volume weight can be reduced, and the sound insulation effect is achieved; 2) the invention takes the alpha-type high-strength gypsum obtained by processing the industrial phosphogypsum as a raw material, improves the utilization rate of the phosphogypsum, realizes the recycling of the waste gypsum, meets the requirement of green buildings, has simple and convenient preparation process, is beneficial to shortening the construction time and is convenient and fast to construct.
Drawings
(1) Fig. 1 is a schematic structural view of a heat-insulating and sound-insulating structure of a ground of a light gypsum-based self-leveling floor according to embodiment 1 of the present invention;
(2) FIG. 2 is a schematic structural view of a heat and sound insulation structure of a floor of a light gypsum-based self-leveling building in embodiment 2;
(3) FIG. 3 is a schematic structural view of a heat and sound insulation structure of a floor of a light gypsum-based self-leveling building in embodiment 3;
in the figure: 1-crack-resistant protective layer, 2-light steel plate layer, 3-light gypsum heat-insulating layer, 4-decorative layer and 5-noise-reducing cotton.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention is further described in detail with reference to the following examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention.
The α type high-strength gypsum used in the embodiment of the invention is obtained by the normal pressure hydrothermal reaction of industrial phosphogypsum, and the main chemical component is CaSO4·0.5H2O, initial setting time is about 15min, final setting time is about 25min, absolute dry compressive strength is 25.4MPa, and 2h flexural strength is 3.5 MPa; the cement is 42.5 grade ordinary portland cement produced by Xinhua cement GmbH; the superfine mineral powder is V1000 superfine slag powder produced by Shanghai Essidery building materials Co., Ltd; the retarder is sodium citrate; the water reducing agent is a naphthalene water reducing agent; the vitrified micro bubbles have the grain diameter of 0.5 to 1.5mm and the volume weight of 50 to 80kg/m3The heat conductivity coefficient is 0.044-0.048W/(m.K); the thickness of the light steel plate isThe length of the light steel keel material is 1000mm, the width of the light steel keel material is 800mm, the height of the upper protruding rib of the light steel is 25mm, and the smooth part of the edge of the light steel is provided with a mounting hole; the standard sand is Chinese ISO standard sand, SiO in the standard sand2The content is more than 96 percent, the ignition loss is less than 0.40 percent, and the mud content is less than 0.20 percent.
Example 1
The utility model provides a light gypsum base is from flowing flat building ground heat preservation sound-proof structure, the schematic structure is shown in figure 1, and it includes anti inoxidizing coating, light steel deck, light gypsum heat preservation and finish coat of laying on the floor in proper order from bottom to top, and anti inoxidizing coating thickness of splitting is 10mm, light steel deck thickness 25mm, and light gypsum heat preservation is higher than light steel deck 10mm, and finish coat thickness is 10mm, and concrete construction method is as follows:
(1) laying a steel wire mesh framework, pouring plastering mortar to fill the steel wire mesh framework and combining with the concrete floor into a whole to form an anti-crack protective layer;
(2) tiling a plurality of light steel plates through bolts and fixedly installing the light steel plates on the anti-cracking protective layer, wherein each light steel plate is provided with 8 protruding ribs, the interval between the highest points of the adjacent protruding ribs is 100mm, the cross section of a hollow column formed by the protruding ribs on the side surface is triangular (isosceles right triangle with a bottom angle of 45 degrees), and a gap of 2-3 mm is reserved between the adjacent light steel plates to obtain a light steel plate layer;
(3) the lightweight gypsum thermal insulation mortar is prepared by mixing a cementing material, an aggregate, a citric acid retarder, a naphthalene water reducing agent and water, wherein the cementing material comprises, by mass, 82% of α type high-strength gypsum, 8% of ordinary portland cement and 10% of ultrafine mineral powder, the mass ratio of the cementing material to the aggregate is 5: 1, the ratio of vitrified microbeads in the aggregate to standard sand is 8: 2, the addition amount of the citric acid retarder is 0.1% of the mass of the gel material, the addition amount of the naphthalene water reducing agent is 0.4% of the mass of the gel material, the aggregate is obtained by partially substituting standard sand with the vitrified microbeads, the ratio of the vitrified microbeads in the aggregate to the standard sand is 60-100 wt%, the ratio of the water to the aggregate is 1: 0.30, the lightweight gypsum thermal insulation mortar is prepared by mixing the components, the initial fluidity of the prepared lightweight gypsum thermal insulation mortar is 190-220mm, the fluidity loss of 30min is less than 3mm, the mortar has aLeveling, controlling elevation, pouring light gypsum heat-insulating mortar on a light steel plate layer to prepare a light gypsum heat-insulating layer, and measuring the flexural strength of the light gypsum heat-insulating layer to be 5.8MPa, the compressive strength to be 28.9MPa and the volume weight to be 1696kg/m3The thermal conductivity coefficient is 0.65W/(m.K);
(4) and paving a decorative surface layer on the light gypsum heat-insulating layer, wherein the decorative surface layer is a floor tile, and thus the light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure is obtained.
Example 2
The utility model provides a light gypsum base is from flowing flat building ground heat preservation sound-proof structure, the schematic structure is shown in fig. 2, and it includes anti inoxidizing coating, light steel deck, light gypsum heat preservation and finish coat of laying on the floor in proper order from bottom to top, and anti inoxidizing coating thickness of splitting is 10mm, light steel deck thickness 25mm, and light gypsum heat preservation is higher than light steel deck 10mm, and finish coat thickness is 10mm, and concrete construction method is as follows:
(1) laying a steel wire mesh framework, pouring plastering mortar to fill the steel wire mesh framework and combining with the concrete floor into a whole to form an anti-crack protective layer;
(2) tiling a plurality of light steel plates through bolts and fixedly installing the light steel plates on the anti-cracking protective layer, wherein each light steel plate is provided with 8 protruding ribs, the interval between the highest points of the adjacent protruding ribs is 100mm, the cross section of a hollow column formed by the protruding ribs on the side surface is semicircular, the radius of the semicircular column is 25mm, and a gap of 2-3 mm is reserved between the adjacent light steel plates to obtain a light steel plate layer;
(3) the lightweight gypsum thermal insulation mortar is prepared by mixing a cementing material, an aggregate, a citric acid retarder, a naphthalene water reducing agent and water, wherein the cementing material comprises, by mass, 82% of α type high-strength gypsum, 8% of ordinary portland cement and 10% of ultrafine mineral powder, the mass ratio of the cementing material to the aggregate is 5: 1, the ratio of vitrified micro-beads to standard sand in the aggregate is 8: 2, the addition amount of the citric acid retarder is 0.1% of the mass of the cementing material, the addition amount of the naphthalene water reducing agent is 0.4% of the mass of the gelling material, the aggregate is vitrified micro-beads, the water-material ratio is 1: 0.30, the components are mixed to obtain the lightweight gypsum thermal insulation mortar, the initial fluidity of the prepared lightweight gypsum thermal insulation mortar is 190-220mm, and the loss of the fluidity is small in 30minWhen the thickness is 3mm, the mortar has a self-leveling effect, leveling is not needed, the elevation is controlled, the lightweight gypsum heat-insulating mortar is poured on a lightweight steel plate layer to prepare the lightweight gypsum heat-insulating layer, and the flexural strength, the compressive strength and the volume weight of the lightweight gypsum heat-insulating layer are respectively 4.0MPa, 17.6MPa and 1268kg/m3The thermal conductivity coefficient is 0.45W/(m.K);
(4) and paving a decorative surface layer on the light gypsum heat-insulating layer, wherein the decorative surface layer is a floor tile, and thus the light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure is obtained.
Example 3
The utility model provides a light gypsum base is from flowing flat building ground heat preservation sound-proof structure, the schematic structure is shown in fig. 3, and it includes anti inoxidizing coating, light steel deck, light gypsum heat preservation and finish coat of laying on the floor in proper order from bottom to top, and anti inoxidizing coating thickness of splitting is 10mm, light steel deck thickness 25mm, and light gypsum heat preservation is higher than light steel deck 10mm, and finish coat thickness is 10mm, and concrete construction method is as follows:
(1) laying a steel wire mesh framework, pouring plastering mortar to fill the steel wire mesh framework and combining with the concrete floor into a whole to form an anti-crack protective layer;
(2) a plurality of light steel plates (the same as the light steel plates used in the embodiment 1) are tiled and fixedly installed on the anti-cracking protective layer through bolts, silencing cotton is arranged in a hollow column formed between the raised ribs of the light steel plates and the anti-cracking protective layer, and gaps of 2-3 mm are reserved between adjacent light steel plates to obtain light steel plate layers;
(3) the lightweight gypsum thermal insulation mortar is prepared by mixing a cementing material, an aggregate, a citric acid retarder, a naphthalene water reducing agent and water, wherein the cementing material comprises, by mass, 82% of α type high-strength gypsum, 8% of ordinary portland cement and 10% of ultrafine mineral powder, the mass ratio of the cementing material to the aggregate is 4: 1, the ratio of vitrified micro-beads to standard sand in the aggregate is 8: 2, the addition amount of the citric acid retarder is 0.1% of the mass of the gel material, the addition amount of the naphthalene water reducing agent is 0.4% of the mass of the gel material, the aggregate is vitrified micro-beads, the water-material ratio is 1:0.45, the components are mixed to obtain the lightweight gypsum thermal insulation mortar, the initial fluidity of the prepared lightweight gypsum thermal insulation mortar is 190-doped, and the fluidity of the prepared lightweight gypsum thermal insulationThe loss is less than 3mm, the mortar has a self-leveling effect, leveling is not needed, the elevation is controlled, the lightweight gypsum heat-insulating mortar is poured on a lightweight steel plate layer to prepare the lightweight gypsum heat-insulating layer, and the flexural strength, the compressive strength and the volume weight of the lightweight gypsum heat-insulating layer are respectively 2.9MPa, 11.3MPa and 1151kg/m3The thermal conductivity coefficient is 0.38W/(m.K);
(4) and paving a decorative surface layer on the light gypsum heat-insulating layer, wherein the decorative surface layer is a floor tile, and thus the light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure is obtained.
It is apparent that the above embodiments are only examples for clearly illustrating and do not limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are therefore intended to be included within the scope of the invention as claimed.
Claims (10)
1. A light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure is characterized by comprising an anti-cracking protective layer, a light steel plate layer, a light gypsum heat-insulating layer and a finish coat which are sequentially paved on a floor slab from bottom to top;
the anti-cracking protective layer consists of a steel wire mesh framework and plastering mortar filled between the steel wire mesh framework and the floor slab;
the light steel plate layer is obtained by tiling and fixedly mounting a plurality of light steel plates on the anti-cracking protective layer, each light steel plate is provided with one or more raised ribs penetrating through the whole steel plate, and a hollow column with a triangular, square, rectangular, arched or semicircular cross section penetrating through the whole steel plate is formed between each raised rib and the anti-cracking protective layer;
the light gypsum heat-insulating layer is prepared from raw materials of a cementing material, aggregate, a retarder, a water reducing agent and water, wherein the cementing material comprises the following components in percentage by mass: 70-85% of alpha-type high-strength gypsum, 5-10% of ordinary portland cement and 10-20% of superfine mineral powder; the aggregate is obtained by partially replacing standard sand with vitrified micro bubbles, the proportion of the vitrified micro bubbles in the aggregate replacing the standard sand is 60-100 wt%, and the mass ratio of the cementing material to the aggregate is 4-10: 1.
2. the light gypsum-based self-leveling floor heat-insulating and sound-insulating structure according to claim 1, wherein the thickness of the anti-cracking protective layer is 5-10 mm.
3. The light gypsum-based self-leveling floor heat-insulating and sound-insulating structure is characterized in that the thickness of the light steel plate is 3-7 mm, the height of the raised ribs on the light steel plate is 20-25 mm, the interval between the highest points of adjacent raised ribs on the light steel plate layer is 80-120 mm, and the interval between adjacent light steel plates is 2-10 mm; the smooth part of the edge of the light steel plate is provided with a mounting hole and is fixedly mounted on the anti-cracking protective layer through a bolt.
4. The heat-insulating and sound-insulating structure for the ground of the light gypsum-based self-leveling building according to claim 1, wherein noise-damping cotton is arranged in the hollow column between the raised rib and the anti-cracking protective layer of the light steel plate.
5. The light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure as claimed in claim 1, wherein the α -type high-strength gypsum is obtained by a normal-pressure hydrothermal reaction of industrial phosphogypsum, and contains CaSO as a main chemical component4·0.5H2O, absolute dry compressive strength of 20-30 MPa.
6. The light-weight gypsum-based self-leveling floor ground heat-preserving and sound-insulating structure according to claim 1, wherein the retarder is a protein retarder or a citric acid retarder, and the addition amount of the retarder is 0.05-0.15% of the mass of the gel material; the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent, and the adding amount of the water reducing agent is 0.3-0.5% of the mass of the gel material.
7. The light gypsum-based self-leveling floor heat-insulating and sound-insulating structure according to claim 1, wherein the particle size of the vitrified micro bubbles is 0.5-1.5 mm,the bulk density is 50 to 80kg/m3And the thermal conductivity is 0.044-0.048W/(m.K).
8. The light-weight gypsum-based self-leveling floor heat-insulating and sound-insulating structure as claimed in claim 1, wherein the flexural strength of the light-weight gypsum heat-insulating layer is 2.9-5.8 MPa, the compressive strength is 11.3-28.9 MPa, and the volume weight is 1100-1700 kg/m3The heat conductivity coefficient is 0.38-0.65W/(m.K), and the light gypsum heat-insulating layer covers the light steel plate layer and is 5-10 mm higher than the highest point of the light steel plate; the decorative layer is floor tile, wood floor or granite.
9. A construction method of the light gypsum-based self-leveling floor thermal insulation and sound insulation structure of any one of claims 1 to 8, comprising the steps of:
1) laying a steel wire mesh framework, pouring plastering mortar to fill the steel wire mesh framework and combining with the concrete floor into a whole to form an anti-crack protective layer;
2) paving and fixedly mounting a plurality of light steel plates on the anti-cracking protective layer through bolts, and reserving a gap of 2-3 mm between every two adjacent light steel plates to obtain a light steel plate layer;
3) preparing light gypsum heat-insulating mortar according to the raw material proportion of the light gypsum heat-insulating layer, controlling the elevation, and pouring the light gypsum heat-insulating mortar on a light steel plate layer to prepare the light gypsum heat-insulating layer;
4) and paving a decorative surface layer on the light gypsum heat-insulating layer to obtain the light gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure.
10. The construction method of the light-weight gypsum-based self-leveling floor ground heat-insulating and sound-insulating structure according to claim 9, further comprising arranging sound-deadening cotton in a hollow column formed between the raised ribs of the light-weight steel plate and the anti-cracking protective layer.
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| CN112761291A (en) * | 2020-12-30 | 2021-05-07 | 天津中冶团泊湖置业有限公司 | Construction method for filling steel structure floor by using industrial byproduct gypsum |
| CN113246557A (en) * | 2021-06-21 | 2021-08-13 | 吉士达建设集团有限公司 | Sound insulation module and sound insulation composite structure |
| CN115013854A (en) * | 2022-06-30 | 2022-09-06 | 八零九零装配式建筑有限责任公司 | Prefabricated groove floor heating module |
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Application publication date: 20200818 |