阅读说明：本技术 一种复合再生混凝土屋面板及制备方法 (Composite recycled concrete roof panel and preparation method thereof ) 是由 肖建庄 邓琪 许碧菀 赵增丰 于 2021-10-28 设计创作，主要内容包括：本发明提供一种复合再生混凝土屋面板,包括有板箱体,所述板箱体呈长方体且包括顶板、底板及若干垂直于顶板和底板且相互平行的侧板,所述板箱体内设有若干容置腔室,所述容置腔室由上至下依次设有砂浆层、通风层、泡沫层,钢筋层,所述通风层中空,所述钢筋层内底部设有若干同向的加强筋,所述加强筋上设有钢筋网,所述加强筋上设有若干凸型连接件,所述凸型连接件上部内嵌于泡沫层,所述顶板上表面还设有防水层。上述屋面板于传统屋面单独设架空隔热层进行改进,在钢筋再生混凝土箱型板内预留通风层,使屋面构造得到简化,同时满足通风散热需求。(The invention provides a composite recycled concrete roof panel which comprises a panel box body, wherein the panel box body is cuboid and comprises a top plate, a bottom plate and a plurality of side plates which are perpendicular to the top plate and the bottom plate and are parallel to each other, a plurality of accommodating chambers are arranged in the panel box body, the accommodating chambers are sequentially provided with a mortar layer, a ventilation layer, a foam layer and a reinforcing steel bar layer from top to bottom, the ventilation layer is hollow, a plurality of reinforcing ribs in the same direction are arranged at the bottom in the reinforcing steel bar layer, reinforcing mesh is arranged on the reinforcing ribs, a plurality of convex connecting pieces are arranged on the reinforcing ribs, 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 plate. Above-mentioned roof boarding establishes built on stilts insulating layer alone in traditional roofing and improves, reserves the ventilation layer in the recycled concrete box template of reinforcing bar, makes the roofing structure obtain simplifying, satisfies ventilation cooling demand simultaneously.)

1. A composite recycled concrete roof board is characterized by comprising a board box body (1), the plate box body (1) is cuboid and comprises a top plate (2), a bottom plate (4) and a plurality of side plates (3) which are perpendicular to the top plate (2) and the bottom plate (4) and are parallel to each other, a plurality of containing chambers (5) are arranged in the plate box body (1), the containing 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, the ventilation layer (7) is hollow, the bottom in the reinforcing steel layer (9) is provided with a plurality of reinforcing ribs (10) in the same direction, the reinforcing rib (10) is provided with a reinforcing mesh (11), the reinforcing rib (10) is provided with a plurality of convex connecting pieces (12), the upper part of the convex connecting piece (12) is embedded in the foam layer (8), and a waterproof layer (13) is further arranged on the upper surface of the top plate (2).

2. The composite recycled concrete roofing 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 50-60 mm;

2) the thickness of the side plate (3) is 100-150 mm;

3) the height of the side plate (3) is 250-350 mm;

4) the distance between the side plates (3) is 750-1200 mm;

5) the thickness of the mortar layer (6) is 15-20 mm;

6) the foam layer (8) has a thickness of 80-100mm and a thermal conductivity of 0.12-0.15w/(m & ltk >);

7) the height of the ventilation layer (7) is 100 mm-150 mm.

3. The composite recycled concrete roofing panel of claim 1, wherein: including any one or more of the following features,

1) the waterproof layer (13) is a flexible waterproof layer;

2) the mortar layer (6) is prepared by mixing recycled fine aggregate, cement, water and zeolite powder into mortar.

4. Composite recycled concrete roof panel according to claim 1, characterized in that the ventilation layer (7) is smooth surfaced.

5. Composite recycled concrete roof panel according to claim 1, characterised in that the material of the panel box (1) is a first concrete, in parts by weight,

190 portions of water and 200 portions of water;

cement 255-;

85-88 parts of fly ash;

85-88 parts of mineral powder;

604 portions of natural sand 595;

530 portions and 534 portions of recycled coarse aggregate;

530 portions and 534 portions of natural coarse aggregate;

0.4-0.45 part of rice straw fiber.

6. A composite recycled concrete roofing panel as defined in claim 1, wherein: the foam layer (8) is made of foam and second concrete, the second concrete is calculated by weight parts,

243 and 245 parts of water;

cement 243-245 parts;

81-82 parts of fly ash;

81-82 parts of zeolite powder;

435 and 439 portions of recycled fine aggregate;

172 portions of regenerated micro powder and 175 portions;

0.4 part of rice straw fiber;

water reducing agent: 1.2-1.5 parts.

7. A composite recycled concrete roof panel as claimed in claim 5 or 6, wherein: the length of the rice straw fiber is 10-20 mm.

8. A composite recycled concrete roofing panel as defined in claim 5, wherein: the length of the steel slag is 5-10 mm.

9. A preparation method of a composite recycled concrete roof panel is characterized by comprising the following steps: the method comprises the following steps:

1) laying reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, laying a reinforcing steel bar net to form a reinforcing steel bar layer, pouring a bottom plate, vertically arranging a plurality of identical side plates on the formed bottom plate in sequence, 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) laying a foam layer on the reinforcing steel bar layer;

4) and repeating the steps 2) to 3) to lay all the accommodating chambers.

Technical Field

The invention relates to the field of building materials, in particular to a composite recycled concrete roof panel.

Background

Along with the development of social economy, the building industry of China is in a vigorous development stage, the demand of building materials is greatly increased, and natural sandstone aggregate resources are limited, so that the shortage of natural resources is caused; meanwhile, a large number of buildings are dismantled, a large number of construction wastes are generated, and the ecological environment is seriously damaged. Therefore, the waste concrete is recycled and regenerated to partially or completely replace natural sandstone aggregate to prepare the regenerated concrete, so that the recycling of the solid waste of the building can be realized, and the requirement of sustainable development is met.

The existing rural roof building generally adopts a mode that a roof brush hydrophobic layer is combined with a heat insulation layer for heat insulation or a ventilation roof is arranged, an overhead layer is arranged on a structural layer, and a cement cover plate is used for protection at the top to realize the heat insulation effect. The heat preservation and insulation measures only have one step, namely, a single heat preservation layer insulates heat or ventilates and radiates heat, and meanwhile, the heat conduction coefficient of the heat insulation material adopted by the overhead layer is relatively large, so that the actual heat preservation and energy saving effects are common. In addition, the roof construction is complicated, and the integrated prefabrication is difficult to realize.

Disclosure of Invention

In view of the above disadvantages of the prior art, the present invention aims to provide a composite recycled concrete roof panel and a manufacturing method thereof, which are used for solving the problems of poor thermal insulation effect and complex process in the prior art.

In order to achieve the above and other related objects, a first aspect of the present invention provides a composite recycled concrete roof panel, which includes a panel box body, wherein the panel box body is rectangular and includes a top plate, a bottom plate and a plurality of side plates perpendicular to the top plate and the bottom plate and parallel to each other, a plurality of accommodating chambers are disposed in the panel box body, the accommodating chambers are sequentially provided with a mortar layer, a ventilation layer, a foam layer and a reinforcing steel layer from top to bottom, the ventilation layer is hollow, a reinforcing steel mesh is disposed at the bottom of the reinforcing steel layer, a plurality of reinforcing ribs in the same direction are disposed on the reinforcing steel mesh, a plurality of convex connecting members are disposed on the reinforcing ribs, the upper portions of the convex connecting members are embedded in the foam layer, and a waterproof layer is further disposed on the top surface of the top plate.

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 250-350 mm;

4) the distance between the side plates is 750 mm-1200 mm;

5) the thickness of the mortar layer is 15-20 mm;

6) the foam layer has a thickness of 80 mm-100 mm and a thermal conductivity of 0.12-0.15W/(m & ltk >);

7) the height of the ventilation layer is 100 mm-150 mm.

Preferably, any one or more of the following features are included,

1) the waterproof layer is a flexible waterproof layer;

2) the mortar layer is prepared by mixing recycled fine aggregate, cement, water and zeolite powder into mortar.

Preferably, the ventilation layer is smooth in surface.

Preferably, the material of the plate box body is first concrete, and the first concrete is mixed with the first concrete according to parts by weight,

190 portions of water and 200 portions of water;

cement 255-;

85-88 parts of fly ash;

85-88 parts of mineral powder;

604 portions of natural sand 595;

530 portions and 534 portions of recycled coarse aggregate;

530 portions and 534 portions of natural coarse aggregate;

0.4-0.45 part of rice straw fiber.

Preferably, the foam layer is made of foam and a second concrete, the second concrete being calculated by weight parts,

243 and 245 parts of water;

cement 243-245 parts;

81-82 parts of fly ash;

81-82 parts of zeolite powder;

435 and 439 portions of recycled fine aggregate;

172 portions of regenerated micro powder and 175 portions;

0.4 part 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 P.O42.5 ordinary portland cement.

The second aspect of the invention provides a preparation method of a composite recycled concrete roof panel, which is characterized by comprising the following steps: the method comprises the following steps:

1) laying reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, laying a reinforcing steel bar net to form a reinforcing steel bar layer, pouring a bottom plate, vertically arranging a plurality of identical side plates on the formed bottom plate in sequence, 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) laying a foam layer on the reinforcing steel bar layer;

4) and repeating the steps 2) to 3) to lay all the accommodating chambers.

As described above, the composite recycled concrete roof panel of the present invention has the following beneficial effects:

(1) the composite recycled concrete roof panel provided by the invention is improved based on the traditional roof separately provided with the overhead heat insulation layer, and the ventilation layer is reserved in the reinforced recycled concrete box-shaped plate, 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 panel provided by the invention, the foam layer and the mortar layer have hygroscopicity, and in summer, on the basis of natural ventilation and heat insulation, moisture absorption and heat preservation at night and evaporation and cooling at daytime are further realized, so that good thermal comfort is comprehensively provided indoors, and the composite recycled concrete roof panel is green and energy-saving. The method is suitable for subtropical regions with damp and hot property, particularly southern coastal regions, and can reduce the average temperature of the inner surface of the roof by 4-5 ℃, thereby meeting the requirements of driven energy-saving buildings.

(3) According to the composite recycled concrete roof panel provided by the invention, the ventilation opening of the foam layer is closed in winter, and the thermal conductivity coefficient is small in a dry state, so that the basic heat preservation requirement is met; meanwhile, a closed ventilation layer forms a closed cavity, so that the heat insulation effect is further improved.

(4) According to the composite recycled concrete roof panel provided by the invention, waste concrete, clay bricks and straws are recycled, so that natural resources can be saved, on the other hand, the pollution of building wastes to the environment is reduced, and meanwhile, the production cost can be reduced.

(5) The invention provides a composite recycled concrete composite roof panel, which is produced by prefabricating a reinforced recycled concrete box-shaped plate and a moisture absorption foam recycled concrete plate in a factory, and then building a moisture absorption recycled mortar layer and a waterproof layer to form the waterproof, heat preservation and load bearing integrated composite roof panel. The construction operation is convenient, the production is fast, and the quality is high.

Drawings

FIG. 1 shows a schematic view of the construction of a composite recycled concrete roof panel according to the present invention.

Fig. 2 shows a schematic view of a partial structure of the composite recycled concrete roof panel of the present invention.

Reference numerals

1 plate box

2 Top plate

3 side plate

4 bottom plate

5 accommodating chamber

6 mortar layer

7 ventilating layer

8 foam layer

9 reinforcing steel bar layer

10 reinforcing bar

11 reinforcing bar net

12 male connection

13 waterproof layer

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1-2. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1-2, the present invention provides a composite recycled concrete roof panel, which includes a panel box 1, wherein the panel box 1 is rectangular and includes a top panel 2, a bottom panel 4 and a plurality of side panels 3 perpendicular to the top panel 2 and the bottom panel 4 and parallel to each other, a plurality of accommodating chambers 5 are provided in the panel box 1, the accommodating chambers 5 are sequentially provided with a mortar layer 6, a ventilation layer 7, a foam layer 8 and a reinforcement layer 9 from top to bottom, the ventilation layer 7 is hollow, a plurality of reinforcing ribs 10 in the same direction are provided at the bottom of the reinforcement layer 9, reinforcement meshes 11 are provided on the reinforcing ribs 10, a plurality of convex connectors 12 are provided on the reinforcing ribs 10, the upper portions of the convex connectors 12 are embedded in the foam layer 8, and a waterproof layer 13 is further provided on the top surface of the top panel 2.

The composite recycled concrete roof panel comprises a panel box body 1, wherein the panel box body 1 is cuboid and comprises a top plate 2, a bottom plate 4 and a plurality of side plates 3 which are perpendicular to the top plate 2 and the bottom plate 4 and are parallel to each other, the thicknesses of the top plate 2) and the bottom plate 4 are increased, the maximum positive stress and deflection of the bottom of the panel are reduced, but the self weight of the roof panel 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 flexibility value cannot be obviously reduced, and meanwhile, the hollow rate is reduced; the height of the side plate 3 is increased, the bottom stress and the deflection of the plate are reduced, the hollow rate is also increased, but the self weight of the roof plate is increased; the distance between the side plates 3 is increased and decreased, the stress, the deflection and the hollow rate of the bottom of the plate are increased, but the self weight is also increased. Therefore, the related parameters of the top plate 2, the side plate 3 and the bottom plate 4 are very important, in the present invention, the thickness of the top plate 2 and 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 distance 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, 1100-1150mm, 1150-1200 mm. In the invention, the top plate 2, the bottom plate 4 and the side plates 3 are all provided with steel bars so as to improve the strength.

The plate box body 1 is made of first concrete and is prepared by replacing natural coarse aggregate with 50-100% of recycled coarse aggregate, the recycled coarse aggregate is recycled by waste concrete, and the fine aggregate is natural sand. The used recycled coarse aggregate is recycled aggregate obtained from waste concrete, is soaked in diluted organic silicon solution and then is dried at 50-60 ℃, and the surface condition of the aggregate is improved to prepare the recycled aggregate. Specifically, the material of the plate box body 1 comprises, by weight, 190 parts of water and 200 parts of water; cement 255-; 85-88 parts of fly ash; 85-88 parts of mineral powder; 604 portions of natural sand 595; 530 portions and 534 portions of recycled coarse aggregate; 530 portions and 534 portions 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 P.O42.5 ordinary portland cement.

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. The stress and deformation of the composite roof plate, the dead weight of the roof plate and the hollow rate index are comprehensively considered, 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 is smooth to ensure ventilation and smoothness, so that the friction resistance is reduced, and the airflow is ensured to be smoother. The mortar layer 6 is prepared by mixing recycled fine aggregate, cement, water and zeolite powder into mortar. More preferably, the zeolite powder mixed in the mortar layer 6 is subjected to 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 percent to increase the chemical adsorption capacity of zeolite powder and water, and simultaneously changing the pore size structure of the zeolite powder through ion exchange to change the humidity regulation performance; and then heating for 1-1.5h at 200 +/-5 ℃, removing impurities such as water molecules, carbonate and the like in the zeolite powder, increasing the specific surface area of the zeolite powder, improving the adsorption performance of the zeolite, comprehensively ensuring that the maximum moisture absorption capacity of the modified zeolite powder is 6.4-7 times of that of the natural zeolite powder, and the maximum moisture release capacity of the modified zeolite powder is 7-8 times of that of the natural zeolite powder. More preferably, the salt-heat modified zeolite powder replaces 30% of cement to be mixed into mortar to prepare the zeolite-based humidity control material, and the mortar layer 6 can meet the requirement of the moisture absorption rate at night and realize that the sufficient heat of the roof panel is taken away by the moisture absorption and evaporation in the daytime.

The height of the ventilation layer 7 is 100-. More preferably still, the first and second liquid crystal display panels are,

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 &), for example, 012-0.13W/(m &), 0.13-0.14W/(m &), 0.14-0.15W/(m &). The foam layer 8 is made of foam and second concrete, wherein the second concrete comprises 245 parts of water 243-; cement 243-245 parts; 81-82 parts of fly ash; 81-82 parts of zeolite powder; 435 and 439 portions of recycled fine aggregate; 172 portions of regenerated micro powder and 175 portions; 0.4 part of rice straw fiber; water reducing agent: 1.2-1.5 parts. The cement is P.O42.5 ordinary portland cement, 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 the bottom steel bars of the box-type plate, the zeolite powder in the foam layer 8 is heated for 1-1.5h at the temperature of 200 +/-5 ℃ in a heating modification mode, the maximum moisture absorption amount is 1.765-2 times of that of the natural zeolite powder, the length of the rice straw fiber is 10-20 mm, the moisture absorption performance is improved in the mode that the zeolite powder subjected to heating modification replaces part of the cement to be doped into mortar to prepare the zeolite-based moisture adjusting material, and the foam layer 8 has moisture absorption performance. The ventilation opening is opened in summer, the air flow is smooth, moisture absorption and heat preservation at night are realized, and the water vapor is evaporated and cooled in the daytime. The ventilation opening is closed in winter, the foam layer 8 absorbs moisture again, and the cavity formed by the porosity of the foam layer and the closed ventilation layer 7 plays a role in double heat preservation. The foam layer 8 is prepared by replacing natural fine aggregate with 100% recycled fine aggregate, and the recycled fine aggregate is recycled by waste clay bricks. The foam layer 8 ensures fine foam and improves the closed porosity by adopting air pressure foaming. The porous light-weight composite material meets the requirements of porosity and light weight, and has relatively higher strength. The rice straw is added into the foam layer 8, and the plant fiber improves the moisture absorption and enhances the crack resistance.

According to the invention, a plurality of reinforcing ribs 10 in the same direction are arranged at the bottom in the reinforcing steel bar layer 9, a reinforcing mesh 11 is arranged on each reinforcing rib 10, a plurality of convex connectors 12 are arranged on each reinforcing rib 10, each convex connector 12 can be a convex galvanized reinforcing connector, each convex connector 12 penetrates through the reinforcing mesh 11, and the upper parts of the convex connectors 12 are embedded in the foam layers 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 top plate 2, the waterproof layer 13 is a flexible waterproof layer, the flexible waterproof layer is made of waterproof materials with certain flexibility and large elongation, such as waterproof materials 13 made of waterproof coiled materials and organic waterproof coatings, and the thickness of the waterproof layer is 8-12mm, for example, 8-10mm and 10-12 mm.

Example 1

A composite recycled concrete roof panel comprises a panel box body 1, wherein the panel box body 1 is cuboid and comprises a top plate 2, a bottom plate 4 and a plurality of side plates 3 which are perpendicular to the top plate 2 and the bottom plate 4 and are parallel to each other, the thickness of the bottom plate 4 and the cover plate is 50mm, the thickness of each side plate 3 is 120mm, the height of each side plate 3 is 200mm, the interval between every two adjacent side plates 3 is 1000mm, a plurality of accommodating chambers 5 are arranged in the panel box body 1, each accommodating chamber 5 is 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, the thickness of the mortar layer 6 is 20mm, 30% salt modified zeolite powder-based humidity regulating material is doped in the mortar layer 6, the ventilation layer 7 is hollow, the thickness of the ventilation layer 7 is 100mm, a plurality of reinforcing ribs 10 in the same direction are arranged at the bottom in the reinforcing steel bar layer 9, a net 11 is arranged on each reinforcing rib 10, and a plurality of convex connectors 12 are arranged on each reinforcing rib 10, the upper portion of the convex connecting piece 12 is embedded in the foam layer 8, the thickness of the foam layer 8 is 80mm, the upper surface of the top plate 2 is further provided with a waterproof layer 13, and the thickness of the waterproof layer 13 is 8 mm.

The preparation method of the plate box body 1 material comprises the following steps: soaking recycled aggregate obtained from waste concrete in diluted organic silicon solution or chemical strengthening solvent such as polymer PVA and the like, drying at 50-60 ℃, and preparing I-type recycled coarse aggregate to replace 50% of coarse aggregate after improving the surface condition of the aggregate; the fine aggregate is natural sand; adding admixtures such as silica fume and the like to improve the compactness; the bottom plate 4 is doped with rice straw fibers to improve the crack resistance, and the concrete mix 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 brick is prepared by replacing natural aggregate with 100 percent of recycled fine aggregate and recycled micro powder, wherein the recycled fine aggregate is recycled by waste clay bricks, and the clay content is high. By adopting air pressure foaming, the foam is fine and dense, and the closed porosity is improved. The porous light-weight composite material meets the requirements of porosity and light weight, and has relatively higher strength. The rice straw is added, and the plant fiber improves the hygroscopicity and enhances the crack resistance. The moisture absorption performance is improved by adopting a mode that the zeolite powder modified by heating replaces part of cement to be doped into mortar to prepare the zeolite-based moisture control material.

The concrete mixing proportion is designed as follows:

ordinary portland cement of p.o42.5 was used.

Based on the weight portion, the weight portion of the material,

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 part of rice straw fiber;

polycarboxylic acid high-efficiency water reducing agent: 1.3 parts.

The preparation method of the composite recycled concrete roof panel comprises the following steps:

1) laying reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, laying a reinforcing steel bar net to form a reinforcing steel bar layer, pouring a bottom plate, vertically arranging a plurality of identical side plates on the formed bottom plate in sequence, 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) laying a foam layer on the reinforcing steel bar layer;

4) and repeating the steps 2) to 3) to lay all the accommodating chambers.

The open ventilation opening can ensure that the average temperature of the inner surface of the roof is 4.0-4.5 ℃ lower than that of the common roof, and has obvious effects of moisture absorption, evaporation and temperature reduction; the ventilation opening is closed, and the heat conductivity coefficient of 0.12-0.15W/(m.K) meets the basic heat preservation requirement in a dry state.

Example 2

A composite recycled concrete roof panel comprises a panel box body 1, wherein the panel box body 1 is cuboid and comprises a top plate 2, a bottom plate 4, a plurality of side plates 3 which are perpendicular to the top plate 2 and the bottom plate 4 and are parallel to each other, the thickness of the bottom plate 4 and the cover plate is 50mm, the thickness of each side plate 3 is 120mm, the height of each side plate 3 is 220mm, the interval between every two adjacent side plates 3 is 1000mm, a plurality of accommodating chambers 5 are arranged in the panel box body 1, each accommodating chamber 5 is 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, the thickness of the mortar layer 6 is 20mm, 30% salt modified zeolite powder-based humidity regulating material is doped in the mortar layer 6, the ventilation layer 7 is hollow, the thickness of the ventilation layer 7 is 100mm, a plurality of reinforcing ribs 10 in the same direction are arranged at the bottom in the reinforcing steel bar layer 9, a net 11 is arranged on each reinforcing rib 10, and a plurality of convex connectors 12 are arranged on each reinforcing rib 10, the upper portion of the convex connecting piece 12 is embedded in the foam layer 8, the thickness of the foam layer 8 is 80mm, the upper surface of the top plate 2 is further provided with a waterproof layer 13, and the thickness of the waterproof layer 13 is 8 mm.

The preparation method of the plate box body 1 material comprises the following steps: soaking recycled aggregate obtained from waste concrete in diluted organic silicon solution or chemical strengthening solvent such as polymer PVA and the like, drying at 50-60 ℃, and preparing I-type recycled coarse aggregate to replace 50% of coarse aggregate after improving the surface condition of the aggregate; the fine aggregate is natural sand; adding admixtures such as silica fume and the like to improve the compactness; the bottom plate 4 is doped with rice straw fibers to improve the crack resistance, and the concrete mix 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 brick is prepared by replacing natural aggregate with 100 percent of recycled fine aggregate and recycled micro powder, wherein the recycled fine aggregate is recycled by waste clay bricks, and the clay content is high. By adopting air pressure foaming, the foam is fine and dense, and the closed porosity is improved. The porous light-weight composite material meets the requirements of porosity and light weight, and has relatively higher strength. The rice straw is added, and the plant fiber improves the hygroscopicity and enhances the crack resistance. The moisture absorption performance is improved by adopting a mode that the zeolite powder modified by heating replaces part of cement to be doped into mortar to prepare the zeolite-based moisture control material.

The concrete mixing proportion is designed as follows:

ordinary portland cement of p.o42.5 was used.

Based on the weight portion, the weight portion of the material,

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 part of rice straw fiber;

polycarboxylic acid high-efficiency water reducing agent: 1.3 parts.

The preparation method of the composite recycled concrete roof panel comprises the following steps:

1) laying reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, laying a reinforcing steel bar net to form a reinforcing steel bar layer, pouring a bottom plate, vertically arranging a plurality of identical side plates on the formed bottom plate in sequence, 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) laying a foam layer on the reinforcing steel bar layer;

4) and repeating the steps 2) to 3) to lay all the accommodating chambers.

The open ventilation opening can ensure that the average temperature of the inner surface of the roof is 4.2-4.5 ℃ lower than that of the common roof, and has obvious effects of moisture absorption, evaporation and temperature reduction; the ventilation opening is closed, and the heat conductivity coefficient of 0.12-0.15W/(m.K) meets the basic heat preservation requirement in a dry state.

Example 3

A composite recycled concrete roof panel comprises a panel box body 1, wherein the panel box body 1) is cuboid and comprises a top plate 2, a bottom plate 4 and a plurality of side plates 3 which are perpendicular to the top plate 2 and the bottom plate 4 and are parallel to each other, the thickness of the bottom plate 4 and the cover plate is 50mm, the thickness of each side plate 3 is 120mm, the height of each side plate 3 is 220mm, the interval between every two adjacent side plates 3 is 1000mm, a plurality of accommodating chambers 5 are arranged in the panel box body 1, each accommodating chamber 5 is 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, the thickness of each mortar layer 6 is 20mm, 30% salt modified zeolite powder-based humidity regulating material is doped in each mortar layer 6, each ventilation layer 7 is hollow, the thickness of each ventilation layer 7 is 100mm, a plurality of reinforcing ribs 10 in the same direction are arranged at the bottom in each reinforcing steel bar layer 9, a reinforcing mesh 11 is arranged on each reinforcing rib 10, and a plurality of convex reinforcing steel bar connectors 12 are arranged on each reinforcing rib 10, the upper portion of the convex connecting piece 12 is embedded in the foam layer 8, the thickness of the foam layer 8 is 100mm, the upper surface of the top plate 2 is further provided with a waterproof layer 13, and the thickness of the waterproof layer 13 is 8 mm.

The preparation method of the plate box body 1 material comprises the following steps: soaking recycled aggregate obtained from waste concrete in diluted organic silicon solution or chemical strengthening solvent such as polymer PVA and the like, drying at 50-60 ℃, and preparing I-type recycled coarse aggregate to replace 50% of coarse aggregate after improving the surface condition of the aggregate; the fine aggregate is natural sand; adding admixtures such as silica fume and the like to improve the compactness; the bottom plate 4 is doped with rice straw fibers to improve the crack resistance, and the concrete mix 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 part of rice straw fiber.

The preparation method of the foam layer 8 material comprises the following steps: the brick is prepared by replacing natural aggregate with 100 percent of recycled fine aggregate and recycled micro powder, wherein the recycled fine aggregate is recycled by waste clay bricks, and the clay content is high. By adopting air pressure foaming, the foam is fine and dense, and the closed porosity is improved. The porous light-weight composite material meets the requirements of porosity and light weight, and has relatively higher strength. The rice straw is added, and the plant fiber improves the hygroscopicity and enhances the crack resistance. The moisture absorption performance is improved by adopting a mode that the zeolite powder modified by heating replaces part of cement to be doped into mortar to prepare the zeolite-based moisture control material.

The concrete mixing proportion is designed as follows:

ordinary portland cement of p.o42.5 was used.

Based on the weight portion, the weight portion of the material,

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 part of rice straw fiber;

polycarboxylic acid high-efficiency water reducing agent: 1.3 parts.

The preparation method of the composite recycled concrete roof panel comprises the following steps:

1) laying reinforcing ribs, arranging convex connecting pieces on the reinforcing ribs, laying a reinforcing steel bar net to form a reinforcing steel bar layer, pouring a bottom plate, vertically arranging a plurality of identical side plates on the formed bottom plate in sequence, 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) laying a foam layer on the reinforcing steel bar layer;

4) and repeating the steps 2) to 3) to lay all the accommodating chambers.

The average temperature of the inner surface of the roof can be 4.3-4.7 ℃ lower than that of the common roof by opening the ventilation opening, and the effect of moisture absorption, evaporation and temperature reduction is remarkable; the ventilation opening is closed, and the heat conductivity coefficient of 0.12-0.15W/(m.K) meets the basic heat preservation requirement in a dry state.

The open ventilation opening can ensure that the average temperature of the inner surface of the roof is 4.0-4.5 ℃ lower than that of the common roof, and has obvious effects of moisture absorption, evaporation and temperature reduction; the ventilation opening is closed, and the heat conductivity coefficient of 0.12-0.15W/(m.K) meets the basic heat preservation requirement in a dry state.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.