CN113863554B - Composite recycled concrete roof board and preparation method thereof - Google Patents
Composite recycled concrete roof board and preparation method thereof Download PDFInfo
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- CN113863554B CN113863554B CN202111266448.4A CN202111266448A CN113863554B CN 113863554 B CN113863554 B CN 113863554B CN 202111266448 A CN202111266448 A CN 202111266448A CN 113863554 B CN113863554 B CN 113863554B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/20—Roofs consisting of self-supporting slabs, e.g. able to be loaded
- E04B7/22—Roofs consisting of self-supporting slabs, e.g. able to be loaded the slabs having insulating properties, e.g. laminated with layers of insulating material
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/248—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
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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
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
- C04B38/106—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a composite recycled concrete roof board which comprises a board box body, wherein the board box body is cuboid and comprises a top board, a bottom board and a plurality of side boards which are perpendicular to the top board and the bottom board and are parallel to each other, a plurality of accommodating chambers are arranged in the board box body, a mortar layer, a ventilation layer, a foam layer and a reinforcing steel layer are sequentially arranged in the accommodating chambers from top to bottom, the ventilation layer is hollow, a plurality of reinforcing steel bars in the same direction are arranged at the bottom in the reinforcing steel bars, reinforcing steel bar meshes are arranged on the reinforcing steel bars, a plurality of convex connecting pieces are arranged on the reinforcing steel bars, the upper parts of the convex connecting pieces are embedded in the foam layer, and a waterproof layer is further arranged on the upper surface of the top board. Above-mentioned roof boarding establishes the built on stilts insulating layer alone in traditional roofing and improves, reserves the ventilation layer in the concrete box template of reinforcing bar regeneration, makes the roofing structure obtain simplifying, satisfies ventilation heat dissipation demand simultaneously.
Description
Technical Field
The invention relates to the field of building materials, in particular to a composite recycled concrete roof board.
Background
With the development of social economy, the building industry in China is in the vigorous development stage, the demand of building materials is increased rapidly, and natural sand and stone aggregate resources are limited, so that the shortage of natural resources is caused; meanwhile, a large amount of buildings are dismantled, a large amount of building garbage is generated, and the ecological environment is seriously damaged. Therefore, the waste concrete is recycled and regenerated, and the recycled concrete is prepared by partially or completely replacing natural sand aggregate, so that the recycling of solid waste of the building can be realized, and the requirement of sustainable development is met.
The current rural roofing building generally adopts roof brush hydrophobic layer to combine with heat preservation heat insulation or establishes ventilation roof, establishes the overhead layer on the structural layer, and the mode of using cement cover plate protection is realized heat preservation heat insulation effect in the top. The heat preservation and heat insulation measures are only one, namely, a single heat preservation layer is used for heat insulation or ventilation and heat dissipation, meanwhile, the heat conduction coefficient of a heat insulation material adopted by the overhead layer is relatively large, and the actual heat insulation and energy conservation effects are general. In addition, roofing construction is complicated, is difficult to realize the prefabrication of integration.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present invention is directed to providing a composite recycled concrete roof panel and a preparation method thereof, which are used for solving the problems of poor heat preservation effect and complex process in the prior art.
To achieve the above object and other related objects, a first aspect of the present invention provides a composite recycled concrete roof panel, including a board box, where the board box is a cuboid and includes a top board, a bottom board, and a plurality of side boards perpendicular to the top board and the bottom board and parallel to each other, a plurality of accommodating chambers are provided in the board box, a mortar layer, a ventilation layer, a foam layer, and a steel bar layer are sequentially provided in the accommodating chambers from top to bottom, the ventilation layer is hollow, a steel bar mesh is provided at the bottom in the steel bar layer, a plurality of reinforcing ribs are provided on the steel bar mesh in the same direction, a plurality of convex connectors are provided on the reinforcing ribs, the upper parts of the convex connectors are embedded in the foam layer, and a waterproof layer is further provided on the upper surface of the top board.
Preferably, any one or more of the following features are included:
1) The thickness of the top plate and the bottom plate is 50 mm-60 mm;
2) The thickness of the side plate is 100 mm-150 mm;
3) The height of the side plate is 250 mm-350 mm;
4) The spacing between the side plates is 750 mm-1200 mm;
5) The thickness of the mortar layer is 15-20mm;
6) The thickness of the foam layer is 80 mm-100 mm, and the heat conductivity coefficient is 0.12-0.15W/(m & k);
7) The height of the ventilation layer is 100 mm-150 mm.
Preferably, including any one or more of the following features,
1) The waterproof layer is a flexible waterproof layer;
2) The mortar layer is prepared from recycled fine aggregate, cement, water and zeolite powder which are mixed with mortar.
Preferably, the ventilation layer has a smooth surface.
Preferably, the material of the plate box body is first concrete, and according to parts by weight,
190-200 parts of water;
255-263 parts of cement;
85-88 parts of fly ash;
85-88 parts of mineral powder;
595-604 parts of natural sand;
530-534 parts of recycled coarse aggregate;
530-534 parts of natural coarse aggregate;
0.4-0.45 parts of rice straw fiber.
Preferably, the foam layer is made of foam and a second concrete, the second concrete being formed by mixing, in parts by weight,
243-245 parts of water;
243-245 parts of cement;
81-82 parts of fly ash;
81-82 parts of zeolite powder;
435-439 parts of recycled fine aggregate;
172-175 parts of regenerated micropowder;
0.4 parts of rice straw fiber;
water reducing agent: 1.2-1.5 parts.
Preferably, the length of the rice straw fiber is 10-20 mm, and the cement is Portland cement of P.O42.5.
The second aspect of the invention provides a method for preparing a composite recycled concrete roof panel, which is characterized in that: the method comprises the following steps:
1) Paving reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, paving reinforcing steel meshes to form a reinforcing steel layer, pouring a bottom plate, sequentially and vertically arranging a plurality of identical side plates on the formed bottom plate, and pouring a top plate parallel to the bottom plate above the side plates to form a plurality of accommodating chambers;
2) Paving a mortar layer on the top of the accommodating chamber;
3) Paving a foam layer on the steel bar layer;
4) Repeating the steps 2) to 3) to lay all the containing chambers.
As described above, the composite recycled concrete roof panel of the invention has the following beneficial effects:
(1) The composite recycled concrete roof board provided by the invention is improved based on the fact that the overhead heat insulation layer is independently arranged on the traditional roof, and the ventilation layer is reserved in the reinforced recycled concrete box board, so that the roof structure is simplified, and meanwhile, the ventilation and heat dissipation requirements are met.
(2) According to the composite recycled concrete roof board provided by the invention, the foam layer and the mortar layer are both hygroscopic, and on the basis of natural ventilation and heat insulation in summer, the moisture absorption and heat insulation at night and the sunlight evaporation and cooling at daytime are further realized, so that good thermal comfort is comprehensively provided for the indoor environment, and the composite recycled concrete roof board is green and energy-saving. The method is suitable for subtropical regions of damp and heat, especially for coastal regions in the south, can reduce the average temperature of the inner surface of the roof by 4-5 ℃, and meets the requirements of the pushed passive energy-saving building.
(3) The composite recycled concrete roof panel provided by the invention has the advantages that the ventilation opening of the foam layer in winter is closed, and the heat conductivity coefficient is small in a dry state, so that the basic heat preservation requirement is met; meanwhile, the closed ventilation layer forms a closed cavity, so that the heat preservation effect is further improved.
(4) The composite recycled concrete roof board provided by the invention recycles waste concrete, clay bricks and straws, can save natural resources, reduces pollution of building wastes to the environment, and can reduce production cost.
(5) The composite regenerated concrete roof board is produced through prefabricating reinforced concrete box-shaped boards and moisture-absorbing foam regenerated concrete boards in factories, then building moisture-absorbing regenerated mortar layers and waterproof layers, and thus the waterproof, heat-insulating and bearing integrated composite roof board is formed. The construction operation is convenient, the production is fast, and the quality is high.
Drawings
Fig. 1 is a schematic view showing the structure of a composite recycled concrete roof panel according to the present invention.
Fig. 2 is a schematic view showing a partial structure of the composite recycled concrete roof panel of the present invention.
Reference numerals
1. Board box
2. Top plate
3. Side plate
4. Bottom plate
5. Accommodating chamber
6. Mortar layer
7. Ventilation layer
8. Foam layer
9. Reinforcing steel bar layer
10. Reinforcing rib
11. Reinforcing mesh
12. Convex connecting piece
13. Waterproof layer
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1-2. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
As shown in fig. 1-2, the invention provides a composite recycled concrete roof board, which comprises a board box body 1, wherein the board box body 1 is in a cuboid shape and comprises a top board 2, a bottom board 4 and a plurality of side boards 3 which are perpendicular to the top board 2 and the bottom board 4 and are parallel to each other, a plurality of accommodating chambers 5 are arranged in the board box body 1, a mortar layer 6, a ventilation layer 7 and a foam layer 8 are sequentially arranged in the accommodating chambers 5 from top to bottom, a reinforcing bar layer 9 is hollow, a reinforcing bar net 11 is arranged on the reinforcing bar layer 10, a plurality of convex connecting pieces 12 are arranged on the reinforcing bar net 10, the upper parts of the convex connecting pieces 12 are embedded in the foam layer 8, and a waterproof layer 13 is further arranged on the upper surface of the top board 2.
The composite recycled concrete roof board provided by the invention comprises a board box body 1, wherein the board box body 1 is in a cuboid shape and comprises a top board 2, a bottom board 4 and a plurality of side boards 3 which are perpendicular to the top board 2 and the bottom board 4 and are mutually parallel, the thickness of the top board 2) and the bottom board 4 is considered to be increased, the maximum normal stress and the deflection of the bottom board are reduced, but the dead weight of the roof board is increased and the hollow rate is reduced; the width of the side plate 3 is increased, so that the bottom stress of the plate can be effectively reduced, but the deflection value cannot be obviously reduced, and meanwhile, the hollow rate is reduced; the height of the side plate 3 is increased, the stress and deflection of the bottom of the plate are reduced, the hollow rate is also increased, but the dead weight of the roof plate is increased; the distance between the side plates 3 is increased and reduced, and the stress, deflection and hollow rate of the bottom of the plate are also increased, but the dead weight is also increased. The relevant parameters of the top plate 2, the side plates 3, the bottom plate 4 are important, in the invention, the thickness of the top plate 2, the bottom plate 4 is 50-60mm, for example, 50-55mm,55-60mm, the thickness of the side plate 3 is 100-150mm, for example, 100-125mm,125-150mm, the height of the side plate 3 is 25-350mm, for example, 250-300mm,300-35mm 0, the spacing between the side plates 3 is 750-1200mm, for example, 750-80mm 0, 800-85mm 0, 850-90mm 0, 900-950mm,950-1000mm,1050-1100mm,1100-115 mm,1150-1200mm. In the invention, the top plate 2, the bottom plate 4 and the side plates 3 are all provided with reinforcing steel bars so as to improve the strength.
The material of the plate box body 1 is first concrete, 50% -100% of recycled coarse aggregate is adopted to replace natural coarse aggregate, the recycled coarse aggregate is recycled by waste concrete, and the fine aggregate is natural sand. The recycled coarse aggregate is recycled aggregate obtained by waste concrete, is prepared by soaking the recycled coarse aggregate in diluted organic silicon solution, drying the recycled coarse aggregate at 50-60 ℃ and improving the surface condition of the aggregate. Specifically, the material of the plate box body 1 is 190-200 parts of water by weight; 255-263 parts of cement; 85-88 parts of fly ash; 85-88 parts of mineral powder; 595-604 parts of natural sand; 530-534 parts of recycled coarse aggregate; 530-534 parts of natural coarse aggregate; 0.4-0.45 part of rice straw fiber, wherein the length of the rice straw fiber is 10-20 mm, the length of the steel slag is 5-10 mm, and the cement is ordinary Portland cement of P.O42.5.
In the composite recycled concrete roof panel provided by the invention, a plurality of accommodating chambers 5 are arranged in the panel box body 1, and the accommodating chambers 5 are sequentially provided with a mortar layer 6, a ventilation layer 7, a foam layer 8 and a reinforcing steel bar layer 9 from top to bottom. Considering the indexes of stress, deformation and dead weight of the composite roof board and the hollow rate comprehensively, the thickness of the mortar layer 6 is 15-20mm, for example, 15-16mm,16-17mm,17-18mm,18-19mm and 19-20mm, and the surface of the mortar layer 6 should be smooth so as to ensure ventilation smoothness, thereby reducing friction resistance and ensuring smoother air flow. The mortar layer 6 is prepared from recycled fine aggregate, cement, water and zeolite powder mixed with mortar. More preferably, zeolite powder doped in the mortar layer 6 is subjected to a salt heat modification treatment. The specific salt heat modification treatment mode is as follows: firstly, treating in calcium chloride of saturated salt solution with the salt concentration of 25%, increasing the chemical adsorption capacity of zeolite powder and water, and changing the pore size structure of zeolite powder through ion exchange, so that the humidity adjusting performance is changed; heating at 200+ -5deg.C for 1-1.5 hr to remove water molecules and carbonate in zeolite powder, increasing specific surface area, and improving adsorption performance of zeolite, to make the maximum moisture absorption of modified zeolite powder 6.4-7 times and the maximum moisture absorption of natural zeolite powder 7-8 times. More preferably, the zeolite-based humidity-regulating material is prepared by mixing the salt heat modified zeolite powder instead of 30% cement into mortar, and the mortar layer 6 can meet the requirement of moisture absorption rate at night, so that sufficient heat of roof boards can be taken away by moisture absorption and evaporation in daytime.
The height of the ventilation layer 7 is 100-150mm, for example, 100-125mm,125-150mm, so as to meet the flow requirement of basic air, and the plate length of the composite roof board is not more than 10m so as to meet the requirement of an air duct. More preferably still the use of a polymer,
the foam layer 8 has a thickness of 80-100mm, for example 80-85mm,85-90mm,90-95mm,95-100mm, and a thermal conductivity of 0.12-0.15W/(m.k), for example 012-0.13W/(m.k), 0.13-0.14W/(m.k), 0.14-0.15W/(m.k). The foam layer 8 is made of foam and second concrete, wherein the second concrete comprises 243-245 parts of water by weight; 243-245 parts of cement; 81-82 parts of fly ash; 81-82 parts of zeolite powder; 435-439 parts of recycled fine aggregate; 172-175 parts of regenerated micropowder; 0.4 parts of rice straw fiber; water reducing agent: 1.2-1.5 parts. The cement is ordinary Portland cement of P.O42.5, the length of the rice straw fiber is 10-20 mm, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, in order to prevent chloride ions from penetrating and eroding reinforcing steel bars at the bottom of a box-type plate, zeolite powder in a foam layer 8 is heated for 1-1.5h in a heating modification mode at 200+/-5 ℃, the maximum moisture absorption amount is 1.765-2 times that of natural zeolite powder, the length of the rice straw fiber is 10-20 mm, the moisture absorption performance is improved in a mode that part of cement is replaced by the heated modified zeolite powder to be mixed with mortar to prepare a zeolite-based moisture regulating material, and the foam layer 8 has moisture absorption. The ventilation opening is opened in summer, the air flow is smooth, moisture absorption and heat preservation at night are realized, and vapor evaporation and cooling are realized in daytime. The ventilation opening is closed in winter, the foam layer 8 absorbs moisture again, and the double heat preservation effect is achieved by utilizing the porosity of the foam layer and the cavity formed by the closed ventilation layer 7. The foam layer 8 material is prepared by adopting 100% recycled fine aggregate to replace natural fine aggregate, wherein the recycled fine aggregate is recycled by waste clay bricks. The foam layer 8 ensures the fineness of foam and improves the airtight void ratio by adopting air pressure foaming. The porous light weight is satisfied, and the strength is relatively higher. The foam layer 8 is added with rice straw and plant fiber to improve hygroscopicity and crack resistance.
In the invention, a plurality of reinforcing ribs 10 in the same direction are arranged at the bottom of the reinforcing steel bar layer 9, a reinforcing steel bar net 11 is arranged on the reinforcing ribs 10, a plurality of convex connecting pieces 12 are arranged on the reinforcing ribs 10, the convex connecting pieces 12 can be convex galvanized reinforcing steel bar connecting pieces, the convex connecting pieces 12 penetrate through the reinforcing steel bar net 11 structure, and the upper parts of the convex connecting pieces 12 are embedded in the foam layer 8.
In the composite recycled concrete roof panel provided by the invention, the waterproof layer 13 is further arranged on the upper surface of the roof plate 2, the waterproof layer 13 is a flexible waterproof layer, the flexible waterproof layer is made of waterproof materials with certain flexibility and larger elongation, such as waterproof coiled materials and waterproof layers 13 formed by organic waterproof coating, and the thickness of the waterproof layers 13 is 8-12mm, for example, 8-10mm and 10-12mm.
Example 1
The utility model provides a compound recycled concrete roof board, is including board box 1, board box 1 is the cuboid and includes roof 2, bottom plate 4 and a plurality of perpendicular to roof 2 and bottom plate 4 and the curb plate 3 that is parallel to each other, bottom plate 4 and apron thickness are 50mm, and curb plate 3 thickness is 120mm, and curb plate 3 height is 200mm, and interval between the adjacent curb plate 3 is 1000mm, be equipped with a plurality of holding cavity 5 in the board box 1, holding cavity 5 is equipped with mortar layer 6, ventilation layer 7, foam layer 8 from top to bottom in proper order, and reinforcing bar layer 9, the thickness of mortar layer 6 is 20mm, mix 30% salt modified zeolite powder based moisture regulating material in the mortar layer 6, ventilation layer 7 cavity, ventilation layer 7 thickness is 100mm, reinforcing bar layer 9 bottom is equipped with a plurality of equidirectional strengthening ribs 10, be equipped with reinforcing bar net 11 on the strengthening rib 10, be equipped with a plurality of protruding connecting pieces 12 on the strengthening rib 10, protruding connecting pieces 12 upper portion are embedded in foam layer 8, the thickness of mortar layer 6 is 20mm, it is 13 mm to mix in the mortar layer 6, the thickness is 3 mm on the roof surface is the waterproof layer.
The preparation method of the plate box body 1 material comprises the following steps: the recycled aggregate obtained by the waste concrete is soaked in diluted organic silicon solution or polymer PVA and other chemical strengthening solvents, dried at 50-60 ℃ and prepared into I-type recycled coarse aggregate to replace 50% of coarse aggregate after improving the surface condition of the aggregate; the fine aggregate adopts natural sand; and adding additives such as silica fume and the like to improve the compactness; the base plate 4 is doped with rice straw fibers to improve crack resistance, and the concrete proportion of the first concrete is designed as follows in parts by weight:
195 parts of water;
260 parts of cement;
87 parts of fly ash;
87 parts of mineral powder;
600 parts of natural sand;
532 parts of recycled coarse aggregate;
532 parts of natural coarse aggregate;
0.4 of rice straw fiber.
The preparation method of the foam layer material comprises the following steps: the recycled fine aggregate is prepared by replacing natural aggregate with 100% of recycled fine aggregate and recycled micro powder, and the recycled fine aggregate is recycled by waste clay bricks, and has high clay content. By adopting air pressure foaming, the foam is ensured to be fine, and the airtight void ratio is improved. The porous light weight is satisfied, and the strength is relatively higher. The rice straw and the plant fiber are added to improve the hygroscopicity and the crack resistance. The moisture absorption performance is improved by adopting a mode of heating modified zeolite powder to replace part of cement to be mixed with mortar to prepare the zeolite-based moisture regulating material.
The specific mixing proportion is designed as follows:
ordinary Portland cement of P.O42.5 was used.
In terms of the weight portions of the components,
244 parts of water;
244 parts of cement;
81 parts of fly ash;
81 parts of zeolite powder;
437 parts of recycled fine aggregate;
173 parts of regenerated micro powder;
0.4 parts of rice straw fiber;
polycarboxylic acid high-efficiency water reducer: 1.3 parts.
The preparation method of the composite recycled concrete roof board comprises the following steps:
1) Paving reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, paving reinforcing steel meshes to form a reinforcing steel layer, pouring a bottom plate, sequentially and vertically arranging a plurality of identical side plates on the formed bottom plate, and pouring a top plate parallel to the bottom plate above the side plates to form a plurality of accommodating chambers;
2) Paving a mortar layer on the top of the accommodating chamber;
3) Paving a foam layer on the steel bar layer;
4) Repeating the steps 2) to 3) to lay all the containing chambers.
The open ventilation opening can enable the average temperature of the inner surface of the roof to be lower than that of the common roof by 4.0-4.5 ℃, and has obvious effects of moisture absorption, evaporation and cooling; and closing the ventilation opening, wherein the heat conductivity coefficient is 0.12-0.15W/(m.K) in a dry state, and the basic heat preservation requirement is met.
Example 2
The utility model provides a compound recycled concrete roof board, is including board box 1, board box 1 is the cuboid and includes roof 2, bottom plate 4 and a plurality of perpendicular to roof 2 and bottom plate 4 and the curb plate 3 that is parallel to each other, bottom plate 4 and apron thickness are 50mm, and curb plate 3 thickness is 120mm, and curb plate 3 height is 220mm, and interval between the adjacent curb plate 3 is 1000mm, be equipped with a plurality of holding cavity 5 in the board box 1, holding cavity 5 is equipped with mortar layer 6, ventilation layer 7, foam layer 8 from top to bottom in proper order, and reinforcing bar layer 9, the thickness of mortar layer 6 is 20mm, mix 30% salt modified zeolite powder based moisture regulating material in the mortar layer 6, ventilation layer 7 cavity, ventilation layer 7 thickness is 100mm, reinforcing bar layer 9 bottom is equipped with a plurality of equidirectional strengthening ribs 10, be equipped with reinforcing bar net 11 on the strengthening rib 10, be equipped with a plurality of protruding connecting pieces 12 on the strengthening rib 10, protruding connecting pieces 12 upper portion are embedded in foam layer 8, the thickness of mortar layer 6 is 20mm, it is 13 mm to be equipped with the waterproof layer on the roof surface, still be 13 mm.
The preparation method of the plate box body 1 material comprises the following steps: the recycled aggregate obtained by the waste concrete is soaked in diluted organic silicon solution or polymer PVA and other chemical strengthening solvents, dried at 50-60 ℃ and prepared into I-type recycled coarse aggregate to replace 50% of coarse aggregate after improving the surface condition of the aggregate; the fine aggregate adopts natural sand; and adding additives such as silica fume and the like to improve the compactness; the base plate 4 is doped with rice straw fibers to improve crack resistance, and the concrete proportion of the first concrete is designed as follows in parts by weight:
195 parts of water;
260 parts of cement;
87 parts of fly ash;
87 parts of mineral powder;
600 parts of natural sand;
532 parts of recycled coarse aggregate;
532 parts of natural coarse aggregate;
0.4 of rice straw fiber.
The preparation method of the foam layer 8) material comprises the following steps: the recycled fine aggregate is prepared by replacing natural aggregate with 100% of recycled fine aggregate and recycled micro powder, and the recycled fine aggregate is recycled by waste clay bricks, and has high clay content. By adopting air pressure foaming, the foam is ensured to be fine, and the airtight void ratio is improved. The porous light weight is satisfied, and the strength is relatively higher. The rice straw and the plant fiber are added to improve the hygroscopicity and the crack resistance. The moisture absorption performance is improved by adopting a mode of heating modified zeolite powder to replace part of cement to be mixed with mortar to prepare the zeolite-based moisture regulating material.
The specific mixing proportion is designed as follows:
ordinary Portland cement of P.O42.5 was used.
In terms of the weight portions of the components,
244 parts of water;
244 parts of cement;
81 parts of fly ash;
81 parts of zeolite powder;
437 parts of recycled fine aggregate;
173 parts of regenerated micro powder;
0.4 parts of rice straw fiber;
polycarboxylic acid high-efficiency water reducer: 1.3 parts.
The preparation method of the composite recycled concrete roof board comprises the following steps:
1) Paving reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, paving reinforcing steel meshes to form a reinforcing steel layer, pouring a bottom plate, sequentially and vertically arranging a plurality of identical side plates on the formed bottom plate, and pouring a top plate parallel to the bottom plate above the side plates to form a plurality of accommodating chambers;
2) Paving a mortar layer on the top of the accommodating chamber;
3) Paving a foam layer on the steel bar layer;
4) Repeating the steps 2) to 3) to lay all the containing chambers.
The open ventilation opening can enable the average temperature of the inner surface of the roof to be lower than that of the common roof by 4.2-4.5 ℃, and has obvious effects of moisture absorption, evaporation and cooling; and closing the ventilation opening, wherein the heat conductivity coefficient is 0.12-0.15W/(m.K) in a dry state, and the basic heat preservation requirement is met.
Example 3
The utility model provides a compound recycled concrete roof board, is including board box 1, board box 1) is the cuboid and includes roof 2, bottom plate 4 and a plurality of perpendicular to roof 2 and bottom plate 4 and the curb plate 3 that is parallel to each other, bottom plate 4 and apron thickness are 50mm, and curb plate 3 thickness is 120mm, and curb plate 3 height is 220mm, and interval between the adjacent curb plate 3 is 1000mm, be equipped with a plurality of holding cavity 5 in the board box 1, holding cavity 5 is equipped with mortar layer 6, ventilation layer 7, foam layer 8 from top to bottom in proper order, and reinforcing bar layer 9, the thickness of mortar layer 6 is 20mm, mix 30% salt modified zeolite powder based humidifying material in the mortar layer 6, ventilation layer 7 cavity, ventilation layer 7 thickness is 100mm, reinforcing bar 9 bottom is equipped with a plurality of equidirectional strengthening ribs 10, be equipped with reinforcing bar net 11 on the strengthening rib 10, be equipped with a plurality of protruding connecting pieces 12 on the strengthening rib 10, protruding connecting pieces 12 upper portion are embedded in foam layer 8, the thickness of mortar layer 6 is 20mm, it is 100mm to be equipped with the waterproof layer 13 mm on the roof surface, the roof surface is 13 mm.
The preparation method of the plate box body 1 material comprises the following steps: the recycled aggregate obtained by the waste concrete is soaked in diluted organic silicon solution or polymer PVA and other chemical strengthening solvents, dried at 50-60 ℃ and prepared into I-type recycled coarse aggregate to replace 50% of coarse aggregate after improving the surface condition of the aggregate; the fine aggregate adopts natural sand; and adding additives such as silica fume and the like to improve the compactness; the base plate 4 is doped with rice straw fibers to improve crack resistance, and the concrete proportion of the first concrete is designed as follows in parts by weight:
195 parts of water;
260 parts of cement;
87 parts of fly ash;
87 parts of mineral powder;
600 parts of natural sand;
532 parts of recycled coarse aggregate;
532 parts of natural coarse aggregate;
0.4 parts of rice straw fiber.
The preparation method of the foam layer 8 material comprises the following steps: the recycled fine aggregate is prepared by replacing natural aggregate with 100% of recycled fine aggregate and recycled micro powder, and the recycled fine aggregate is recycled by waste clay bricks, and has high clay content. By adopting air pressure foaming, the foam is ensured to be fine, and the airtight void ratio is improved. The porous light weight is satisfied, and the strength is relatively higher. The rice straw and the plant fiber are added to improve the hygroscopicity and the crack resistance. The moisture absorption performance is improved by adopting a mode of heating modified zeolite powder to replace part of cement to be mixed with mortar to prepare the zeolite-based moisture regulating material.
The specific mixing proportion is designed as follows:
ordinary Portland cement of P.O42.5 was used.
In terms of the weight portions of the components,
244 parts of water;
244 parts of cement;
81 parts of fly ash;
81 parts of zeolite powder;
437 parts of recycled fine aggregate;
173 parts of regenerated micro powder;
0.4 parts of rice straw fiber;
polycarboxylic acid high-efficiency water reducer: 1.3 parts.
The preparation method of the composite recycled concrete roof board comprises the following steps:
1) Paving reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, paving reinforcing steel meshes to form a reinforcing steel layer, pouring a bottom plate, sequentially and vertically arranging a plurality of identical side plates on the formed bottom plate, and pouring a top plate parallel to the bottom plate above the side plates to form a plurality of accommodating chambers;
2) Paving a mortar layer on the top of the accommodating chamber;
3) Paving a foam layer on the steel bar layer;
4) Repeating the steps 2) to 3) to lay all the containing chambers.
The open ventilation opening can lead the average temperature of the inner surface of the roof to be lower than that of the common roof by 4.3-4.7 ℃, and has obvious effects of moisture absorption, evaporation and cooling; and closing the ventilation opening, wherein the heat conductivity coefficient is 0.12-0.15W/(m.K) in a dry state, and the basic heat preservation requirement is met.
The open ventilation opening can enable the average temperature of the inner surface of the roof to be lower than that of the common roof by 4.0-4.5 ℃, and has obvious effects of moisture absorption, evaporation and cooling; and closing the ventilation opening, wherein the heat conductivity coefficient is 0.12-0.15W/(m.K) in a dry state, and the basic heat preservation requirement is met.
In summary, the present invention effectively overcomes the disadvantages of the prior art and has high industrial utility value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (6)
1. The composite recycled concrete roof board is characterized by comprising a board box body (1), wherein the board box body (1) is cuboid and comprises a top board (2), a bottom board (4) and a plurality of side boards (3) which are perpendicular to the top board (2) and the bottom board (4) and are parallel to each other, a plurality of accommodating chambers (5) are arranged in the board box body (1), a mortar layer (6), a ventilation layer (7) and a foam layer (8) are sequentially arranged in the accommodating chambers (5) from top to bottom, a reinforcing steel bar layer (9) is hollow, a plurality of reinforcing steel bars (10) in the same direction are arranged in the inner bottom of the reinforcing steel bar layer (9), a reinforcing steel bar net (11) is arranged on the reinforcing steel bars (10), a plurality of convex connecting pieces (12) are arranged on the reinforcing steel bars (10), the upper parts of the convex connecting pieces (12) are embedded in the foam layer (8), a waterproof layer (13) is further arranged on the upper surface of the top board (2), and the waterproof layer (13) is flexible; the plate box body (1) is made of first concrete, and comprises the following components in parts by weight,
190-200 parts of water;
255-263 parts of cement;
85-88 parts of fly ash;
85-88 parts of mineral powder;
595-604 parts of natural sand;
530-534 parts of recycled coarse aggregate;
530-534 parts of natural coarse aggregate;
0.4-0.45 parts of rice straw fiber;
the foam layer (8) is made of foam and second concrete, the second concrete adopts zeolite powder modified by heating to replace part of cement to be mixed with mortar to prepare zeolite-based humidity-regulating material, the second concrete is used for improving the moisture absorption performance according to the weight parts,
243-245 parts of water;
243-245 parts of cement;
81-82 parts of fly ash;
81-82 parts of zeolite powder;
435-439 parts of recycled fine aggregate;
172-175 parts of regenerated micropowder;
0.4 parts of rice straw fiber;
water reducing agent: 1.2-1.5 parts;
the mortar layer (6) is prepared by mixing recycled fine aggregate, cement, water and zeolite powder into mortar;
the mortar layer (6) adopts the salt heat modified zeolite powder to replace 30% of cement to be mixed with mortar to prepare zeolite-based humidity-regulating material, so as to meet the requirement of the night moisture absorption rate of the mortar layer;
the foam layer and the mortar layer are hygroscopic, moisture absorption and heat preservation at night are further realized on the basis of natural ventilation and heat insulation in summer, and sunlight is evaporated and cooled in daytime, so that good thermal comfort is provided indoors comprehensively, and the environment-friendly and energy-saving effects are realized.
2. The composite recycled concrete roof panel of claim 1, wherein: including any one or more of the following features:
1) The thickness of the top plate (2) and the bottom plate (4) is 50 mm-60 mm;
2) The thickness of the side plate (3) is 100 mm-150 mm;
3) The height of the side plate (3) is 250 mm-350 mm;
4) The spacing between the side plates (3) is 750-1200 mm;
5) The thickness of the mortar layer (6) is 15-20mm;
6) The thickness of the foam layer (8) is 80-100mm, and the heat conductivity coefficient is 0.12-0.15 w/(m & k);
7) The height of the ventilation layer (7) is 100 mm-150 mm.
3. Composite recycled concrete roof panel according to claim 1, characterized in that the ventilation layer (7) is smooth in surface.
4. The composite recycled concrete roof panel of claim 1, wherein: the length of the rice straw fiber is 10-20 mm.
5. The composite recycled concrete roof panel of claim 1, wherein: the length of the steel slag is 5-10 mm.
6. A preparation method of a composite recycled concrete roof board is characterized by comprising the following steps: the method comprises the following steps:
1) Paving reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, paving reinforcing steel meshes to form a reinforcing steel layer, pouring a bottom plate, sequentially and vertically arranging a plurality of identical side plates on the formed bottom plate, and pouring a top plate parallel to the bottom plate above the side plates to form a plurality of accommodating chambers;
2) Paving a mortar layer on the top of the accommodating chamber;
3) Paving a foam layer on the steel bar layer;
4) Repeating the steps 2) to 3) to lay all the containing chambers.
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2888736B2 (en) * | 1993-08-19 | 1999-05-10 | 積水化学工業株式会社 | Roof structure |
| CN2247692Y (en) * | 1996-03-05 | 1997-02-19 | 张玉林 | Multifunctional longspan compound box roofing slab |
| JP2001026995A (en) * | 1999-07-15 | 2001-01-30 | Taisei Jutaku:Kk | Thermal insulation member for forming ventilation layer of building, and thermal insulation structure of building using the same |
| CN106592877A (en) * | 2016-11-08 | 2017-04-26 | 湖南诚友绿色建材科技有限公司 | Thermal insulation-greening-structure integrated movable roof panel |
| CN110565880B (en) * | 2019-08-19 | 2022-02-01 | 中国建筑材料科学研究总院有限公司 | Cooling integration roof boarding reaches cooling integration roof including it |
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