Anti-cracking construction method for roof concrete protection layer

Abstract

The invention discloses a roof concrete protection layer anti-cracking construction method which comprises the steps that a roof structure is divided into a central bin and an edge stress releasing bin, the area between the edge of the central bin and an out-roof structure is the edge stress releasing bin, and a preset distance is formed between the edge of the central bin and the out-roof structure; first concrete is poured in the central bin to form a central plate through solidification; and second concrete is poured in the edge stress release bin later, the second concrete is fine aggregate concrete, a slope is formed at the top of the second concrete, the lower side of the slope is flush with the top face of the central plate, and the upper side of the slope is arranged obliquely upwards towards the out-of-roof structure. The method solves the problem that a roof waterproof protection layer in an existing construction method is prone to cracking.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly to a construction method for preventing cracking of a roof concrete protection layer. Background Art

[0002] The roof waterproof protection layer generally uses concrete, and its function is to protect the roof waterproof layer. The roof waterproof protection layer is generally provided with a slope for drainage. Due to factors such as the self-shrinkage of concrete, the roof waterproof protection layer of the existing construction method is prone to cracking. On the one hand, it affects the appearance. On the other hand, it is not easy to drain after rainwater seeps down through the cracks, and there is a potential leakage hazard. Summary of the Invention

[0003] In order to overcome the defects of the existing technology, a construction method for preventing cracking of a roof concrete protection layer is provided to solve the problem that the roof waterproof protection layer of the existing construction method is prone to cracking.

[0004] To achieve the above object, a construction method for preventing cracking of a roof concrete protection layer is provided, including the following steps:

[0005] Divide the roof structure into a central bin and an edge stress release bin. The area between the edge of the central bin and the structure out of the roof is the edge stress release bin, and a preset distance is formed between the edge of the central bin and the structure out of the roof;

[0006] Pour the first concrete in the central bin first to solidify and form a central plate;

[0007] Pour the second concrete in the edge stress release bin later. The second concrete is fine aggregate concrete, and the top of the second concrete forms a slope. The lower side of the slope is aligned with the top surface of the central plate, and the upper side of the slope is obliquely upward towards the structure out of the roof.

[0008] Further, the preset distance is 200 mm.

[0009] Further, the height of the upper side of the slope is higher than the up-turned height of the waterproof layer on the side of the structure out of the roof.

[0010] Further, the structure out of the roof includes a parapet wall, columns, and ventilation shafts.

[0011] Further, a wire mesh is hung on the slope and plastered to form a concave arc surface.

[0012] Further, the central plate is formed with a slope structure. Before pouring the first concrete, lay a thermal insulation board on the roof floor to form a step, and then spread the first concrete on the step to solidify and form the slope structure.

[0013] Further, the heat preservation board is an extruded board.

[0014] The beneficial effect of the present invention lies in that the construction method for preventing cracking of the roof concrete protective layer of the present invention reduces the cracking of the concrete surface layer on the plane by performing compartmentalized pouring on the waterproof protective layer of the roof structure and reserving an edge stress release compartment. By using fine aggregate concrete base course of the edge stress release compartment to connect the vertical waterproof protective layer of the parapet wall with the planar protective layer of the roof floor slab, the cracking of the vertical surface layer is reduced, and the construction quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objectives, and advantages of the present application will become more apparent:

[0016] Figure 1 It is a schematic plan view of the compartmentalization of the roof structure of the embodiment of the present invention.

[0017] Figure 2 It is a schematic structural view of the edge stress release compartment of the embodiment of the present invention.

[0018] Figure 3 It is a schematic structural view of the slope-forming structure of the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further elaborates the present application in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the relevant invention and not for limiting the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0020] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will elaborate on the present application in detail with reference to the drawings and embodiments.

[0021] Referring to Figures 1 to 3 as shown, the present invention provides a construction method for preventing cracking of the roof concrete protective layer, including the following steps:

[0022] S1. Divide the roof structure into a central compartment a and an edge stress release compartment b. The area between the edge of the central compartment a and the structure emerging from the roof 1 is the edge stress release compartment b, and a preset distance L is formed between the edge of the central compartment a and the structure emerging from the roof 1.

[0023] In this embodiment, the structure emerging from the roof 1 includes a parapet wall, columns, and air shafts.

[0024] Specifically, referring to Figure 1 as shown, a parapet wall is vertically provided at the outer edge of the roof floor slab. An edge stress release compartment b is formed between the inner edge c of the parapet wall and the central compartment a.

[0025] In addition, structural columns are vertically provided in the middle of the roof floor slab. An edge stress release bin is also formed between the circumferential side of the structural column and the central bin.

[0026] As a preferred embodiment, the preset distance L is 200 mm.

[0027] A waterproof layer 6 is laid on the roof floor slab. After the waterproof layer meets the parapet wall, it is turned up and pasted on the parapet wall.

[0028] S2. First, pour the first concrete in the central bin a to solidify and form the central plate 2.

[0029] In this embodiment, the first concrete is selected as crack-resistant concrete. Specifically, through the trial mix of the concrete mix ratio, the cement dosage is reduced, and crack-resistant admixtures are added to improve the crack resistance of the first concrete.

[0030] Before pouring the central bin, intercept it with wooden formwork at the edge of the central bin, and then pour the first concrete inside the wooden formwork to solidify and form the central plate.

[0031] S3. Then, pour the second concrete 3 in the edge stress release bin b. The second concrete 3 is fine aggregate concrete. The top of the second concrete 3 forms a slope. The lower side of the slope is aligned with the top surface of the central plate 2, and the upper side of the slope is arranged obliquely upward towards the out-of-roof structure 1.

[0032] After the central plate is solidified and formed, remove the wooden formwork. Pour the edge stress release bin with fine aggregate concrete and raise the pouring height to 10 cm to form a slope.

[0033] Refer to Figure 2 As shown, the height of the upper side of the slope is higher than the up-turned height of the waterproof layer 6 on the side of the out-of-roof structure 1.

[0034] The fine aggregate concrete slope is an anti-cracking measure for the base treatment of the waterproof protective layer on the side wall of the parapet wall, and the construction joint should be reserved synchronously with the waterproof protective layer concrete of the central plate.

[0035] As a preferred embodiment, continue to refer to Figure 2 As shown, a concave arc surface 4 is formed by hanging a net and plastering on the slope.

[0036] In this embodiment, the central plate 2 is formed with a slope-forming structure 21. Before pouring the first concrete, lay a thermal insulation board 5 on the roof floor slab 7 to form a step, and then spread the first concrete on the step to solidify and form the slope-forming structure 21.

[0037] As a preferred embodiment, the thermal insulation board 5 is an extruded polystyrene board.

[0038] The extruded board is arranged in a stepped shape for graded slope finding, which can reduce the thickness of the concrete and the generation of hydration heat. On the other hand, the graded slope finding of the extruded board can be used as a thermal insulation measure.

[0039] For the construction method for preventing cracking of the roof concrete protective layer of the present invention, by performing compartmentalized pouring on the waterproof protective layer of the roof structure and reserving an edge stress release compartment, the cracking of the concrete surface layer on the plane is reduced. By using the fine aggregate concrete base layer of the edge stress release compartment to connect the vertical waterproof protective layer of the parapet wall with the plane protective layer of the roof floor slab, the cracking of the vertical surface layer is reduced and the construction quality is improved.

[0040] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. A construction method for preventing cracking of the concrete protective layer on the roof, characterized in that, It includes the following steps: Divide the roof structure into a central bin and an edge stress relief bin. The area between the edge of the central bin and the roof structure is the edge stress relief bin, and a preset distance is formed between the edge of the central bin and the roof structure. Pour the first concrete in the central bin to solidify and form a central slab. Pour the second concrete in the edge stress relief bin later. The second concrete is fine aggregate concrete, and the top of the second concrete forms a slope. The lower side of the slope is aligned with the top surface of the central slab, and the upper side of the slope is inclined upward towards the roof structure.

2. The construction method for preventing cracking of the roof concrete protective layer according to claim 1, characterized in that The preset distance is 200 mm.

3. The anti-cracking construction method of the roof concrete protection layer according to claim 1, characterized in that, The height of the upper side of the slope is higher than the upward turning height of the waterproof layer on the side of the roof structure.

4. The anti-cracking construction method for the roof concrete protective layer according to claim 1, characterized in that, The roof structure includes a parapet wall, columns, and a ventilation shaft.

5. The anti-cracking construction method for the roof concrete protective layer according to claim 1, characterized in that, Mesh plastering is carried out on the slope to form a concave arc surface.

6. The construction method for preventing cracking of the roof concrete protective layer according to claim 1 is characterized in that, The central slab is formed with a slope structure. Before pouring the first concrete, lay a thermal insulation board on the roof floor slab to form a step, and then spread the first concrete on the step to solidify and form the slope structure.

7. The anti-cracking construction method for the roof concrete protective layer according to claim 6, characterized in that, The thermal insulation board is an extruded polystyrene board.

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