CN219491593U - Anti-cracking ground composite heat-insulating structure - Google Patents

Abstract

The utility model belongs to the technical field of ground heat-insulating structures, and particularly discloses an anti-cracking ground composite heat-insulating structure. The anti-cracking ground composite heat-insulating structure comprises a heat-insulating plate, a hard die sleeve, a grid layer and a gypsum self-leveling layer which are sequentially laminated on a concrete base layer; the top surface of the heat insulation board is provided with a plurality of bulges which are arranged at intervals and are composed of a supporting part and a hooking part; the hard die sleeve is sleeved on the top surface of the heat insulation plate; the grid layer is laid on a plane where the top end of the hard die sleeve is located; the gypsum self-leveling layer is positioned above the grid layer and in the space between the grid layer and the hard die sleeve. The ground composite heat-insulating structure increases the contact area of the heat-insulating layer and the gypsum self-leveling layer and reduces the risk of empty drum cracking of the heat-insulating layer and the gypsum self-leveling layer by carrying out special-shaped design on the heat-insulating plate shape and using the heat-insulating plate shape together with parts such as a hard die sleeve and the like.

Description

Anti-cracking ground composite heat-insulating structure

Technical Field

The utility model belongs to the technical field of ground heat-insulating structures, and particularly relates to an anti-cracking ground composite heat-insulating structure.

Background

At present, a ground heat-insulating leveling system is generally composed of a heat-insulating board and fine stone concrete, a heat-insulating board and gypsum self-leveling, heat-insulating mortar and fine stone concrete, or a heat-insulating mortar and gypsum self-leveling composite structure. The composite heat-insulating structure with the self-leveling heat-insulating board and gypsum has the most wide application due to the advantages of simple construction and low comprehensive cost. However, the problems of hollowing and cracking easily occur in the later stage of a ground heat insulation leveling system formed by the heat insulation board and the gypsum self-leveling mortar due to the defects of low compressive strength, weak supporting force and low bonding strength with the gypsum self-leveling mortar of the heat insulation board.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides the anti-cracking ground composite heat-insulating structure, which increases the contact area between the heat-insulating layer and the gypsum self-leveling layer and reduces the risk of cracking of the heat-insulating layer and the gypsum self-leveling layer by specially-shaped design of the heat-insulating plate shape and the use of parts such as a hard die sleeve.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

a composite thermal insulation structure for an anti-cracking ground comprises a thermal insulation board, a hard die sleeve, a grid layer and a gypsum self-leveling layer which are sequentially laminated on a concrete base layer.

The heat-insulating board is a polyphenyl board or an extruded board; the bottom surface is attached to the concrete base layer, and the top surface is in special-shaped design. Specifically, the top surface of the heat insulation board is provided with a plurality of bulges arranged at intervals, each bulge is composed of a supporting part and a hooking part, and the width of the bottom end of the hooking part (namely the connecting end with the supporting part) is larger than the width of the top end of the hooking part and also larger than the width of the supporting part.

The hooking portion may be shaped like a semicircle, triangle, or small semicircle, so that an umbrella-shaped or nail-shaped protrusion can be formed. Therefore, even the widest part of the bulge, namely the bottom corner of the hooking part, plays a role similar to a hook and is tightly combined with the gypsum self-leveling layer around the bulge, the contact area between the heat insulation layer and the gypsum self-leveling layer is increased, the tensile bonding strength between layers is improved, the mechanical tensile stress between the two layers is improved, and the risk of empty drum cracking between the heat insulation layer and the gypsum self-leveling layer is reduced.

The thickness of the bottom of the insulation board except the bulges is 0.5 cm-6 cm; the height of the bulge is 1 cm-3 cm, and the width of the supporting part is 1 cm-5 cm; the distance between every two adjacent bulges (calculated by the distance between the supporting parts of every two adjacent bulges) is 2 cm-20 cm.

The hard die sleeve can be made of hard materials such as a hard PVC plastic plate, a PP plastic plate, a PE plastic plate, a PS plastic plate, an ABS plastic plate and the like, is sleeved on the top surface of the heat insulation plate, completely covers the protrusions therein and completely covers the heat insulation plate among the protrusions.

The thickness of the hard die sleeve is controlled to be 0.3-3 mm, and the corresponding shape of the hard die sleeve is consistent with the shape of the top surface of the heat insulation plate so as to be completely attached to the top surface of the heat insulation plate. The special-shaped part of the top surface of the heat-insulating plate is sleeved with the hard die sleeve, so that the heat-insulating plate can be reinforced, the special-shaped protrusion is stabilized, and stronger tensile bonding strength is formed between the heat-insulating plate and the gypsum self-leveling layer.

The grid layer is laid on the top surface of the hard die sleeve and can be grid cloth or a metal net; the mesh cloth can be alkali-resistant glass fiber mesh cloth, and the metal mesh can be an iron wire mesh or a stainless steel mesh.

The arrangement of the grid layer ensures that the self-leveling gypsum mortar is poured and then can be positioned at the middle upper part of the self-leveling gypsum layer when the anti-cracking ground composite insulation structure is manufactured, and the anti-cracking ground composite insulation structure can better disperse the tensile stress caused by the dry shrinkage and temperature deformation of the self-leveling gypsum mortar and reduce surface plastic cracking and later cracking compared with the self-leveling gypsum mortar which is paved at the bottom (namely, paved at the root of the raised supporting part).

The gypsum self-leveling layer is positioned above the grid layer and in the space between the grid layer and the hard die sleeve.

The gypsum self-leveling layer is formed by casting the existing self-leveling mortar with sand or sand-free paste, wherein the absolute dry compressive strength is not less than 20MPa, and the size change rate range is not more than +/-0.05%. Specifically, the technology-mature commercial gypsum self-leveling mortar such as the ionobang gypsum self-leveling mortar (G20), the Jintai thick-layer gypsum-based self-leveling material and the like.

The thickness of the gypsum self-leveling layer is 2 cm-6 cm.

The gypsum self-leveling layer fully utilizes the characteristics of high compressive strength and tensile bonding strength and small later dimensional change rate of the gypsum self-leveling mortar material. The surface layer of the anti-cracking ground composite heat-insulating structure is used, the grid layer of the middle layer is combined to further disperse shrinkage tensile stress, the hard die sleeve of the bottom layer disperses local compressive stress, and the problem of later cracking of the ground heat-insulating structure is basically thoroughly solved through the upper, middle and lower three-layer composite structure.

Drawings

The above and other aspects, features and advantages of embodiments of the present utility model will become more apparent from the following description when taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of an anti-crack ground composite insulation structure according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of an insulation board in a crack-resistant ground composite insulation structure according to an embodiment of the present utility model.

Detailed Description

Hereinafter, embodiments of the present utility model will be described in detail with reference to the accompanying drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided to explain the principles of the utility model and its practical application so that others skilled in the art will be able to understand the utility model for various embodiments and with various modifications as are suited to the particular use contemplated. In the drawings, the shape and size of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or similar elements.

In the description and claims of the present application and the above-described drawings, the terms "upper", "lower", "top", "bottom", "inner", and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 and 2, the present utility model provides an anti-crack floor composite insulation structure 2 provided on a concrete base layer 1.

Specifically, the crack-resistant ground composite heat-insulating structure 2 comprises a heat-insulating plate 21, a hard die sleeve 22, a grid layer 23 and a gypsum self-leveling layer 24 which are sequentially laminated.

The bottom surface of the heat-insulating plate 21 is basically flush and is directly attached to the concrete base layer 1. The top surface of the heat preservation plate 21 is in a special-shaped design. Specifically, the top surface of the thermal insulation board 21 is provided with a plurality of spaced protrusions 21a, and each protrusion 21a is composed of a bottom supporting portion 211 and a top hooking portion 212.

The bottom width w2 of the hooking portion 212 is greater than the top width thereof and is also greater than the width w1 of the supporting portion 211.

The hooking portion 212 may be in a shape such as a semicircle, a triangle, or a small semicircle (i.e., a shape formed by a major arc and a chord in a circle), so that the protrusion 21a is ensured to be in an "umbrella shape" (i.e., when the height of the hooking portion 212 is large) or in a "nail shape" (i.e., when the height of the hooking portion 212 is small).

In this way, the widest part of the protrusion 21a, namely the bottom corner of the hooking part 212, plays a role similar to a hook, and is tightly combined with the gypsum self-leveling layer 24 around the protrusion, so that the contact area between the heat insulation layer 21 and the gypsum self-leveling layer 24 is increased, the tensile bonding strength between the two layers is improved, the mechanical tensile stress between the two layers is improved, and the risk of hollowing and cracking between the heat insulation layer 21 and the gypsum self-leveling layer 24 is reduced.

The heat-insulating plate 21 is made of polystyrene board or extruded sheet.

The thickness h1 of the lower half of the thermal insulation board 21, i.e., the regular portion other than the protrusions 21a, is 0.5cm to 6cm; the height h2 of the protrusion 21a is 1cm to 3cm, wherein the width w1 of the supporting portion 211 is 1cm to 5cm; the spacing W between the projections 21a (in terms of the spacing between the support portions 211 in the two adjacent projections 21 a) is 2cm to 20cm.

The hard die sleeve 22 is sleeved on the top surface of the heat insulation plate 21, so that all the bulges 21a are completely covered in the hard die sleeve, and the heat insulation plate 21 among all the bulges 21a is also completely covered; thus, the shape thereof is kept in conformity with the shape of the top surface of the heat-insulating plate 21 to completely fit the top surface of the heat-insulating plate 21.

The hard die sleeve 22 can be made of hard materials such as hard PVC plastic plate, PP plastic plate, PE plastic plate, PS plastic plate, ABS plastic plate and the like, and the thickness is controlled to be 0.3 mm-3 mm. The special-shaped part of the top surface of the heat-insulating plate 21 is sleeved with the hard die sleeve 22 with certain rigidity, so that the heat-insulating plate 21 can be reinforced, the special-shaped protrusions 21a are stabilized, and stronger tensile bonding strength between the protrusions 21a and the gypsum self-leveling layer 24 is ensured.

The top surface of the hard die sleeve 22 is paved with a grid layer 23; in other words, the mesh layer 23 is laid on the plane of the top end of the hard die sleeve 22, and does not bend with the special shape of the top surface of the hard die sleeve 22.

The mesh layer 23 may be a mesh cloth or a metal mesh; the mesh cloth may be alkali-resistant fiberglass mesh cloth, and the metal mesh may be wire mesh or stainless steel mesh.

The arrangement of the grid layer 23 ensures that after the gypsum self-leveling mortar is poured in the manufacturing process of the crack-resistant ground composite insulation structure, the gypsum self-leveling mortar can permeate the grid layer 23 to fall onto the lower hard die sleeve 22, so that the grid layer 23 is positioned at the middle upper part of the formed gypsum self-leveling layer 24. This treatment method can better disperse the tensile stress due to drying shrinkage and temperature deformation when the gypsum self-leveling mortar forms the gypsum self-leveling layer 24, and reduce surface plastic cracking and post cracking, compared to the bottom laying method of laying the root of the supporting portion 211 of the boss 21 a.

The thickness of the mesh layer 23 is not particularly limited, and may be determined in practice according to the specific mesh materials listed above, that is, different thicknesses corresponding to different specifications of commercially available mesh cloth or metal mesh.

The gypsum self-leveling layer 24 is distributed over the mesh layer 23 and in the space between the mesh layer 23 and the hard jacket 22.

The gypsum self-leveling layer 24 is formed by casting with the existing sand-containing or sand-free gypsum self-leveling mortar with absolute dry compressive strength not less than 20MPa and dimensional change rate not more than +/-0.05% as a material, and specifically, the enobang gypsum self-leveling mortar (G20) is used in the example.

The thickness of the gypsum self-leveling layer 24 is controlled to be 2cm to 6cm, and the specific thickness is determined according to the specific height h2 of the protrusions 21a so as to ensure that the mesh layer 23 is positioned at the middle upper portion of the whole gypsum self-leveling layer 24.

The anti-cracking ground composite heat-insulating structure can be manufactured by the following method:

first, the heat-insulating board 21 is fully laid on the cleaned concrete base layer 1.

The protrusions 21a formed on the top surface of the heat-insulating plate 21 can be formed by using a specific mold when manufacturing the heat-insulating plate 21.

Next, the hard die sleeve 22 is tightly clamped on the thermal insulation plate 21 at the position corresponding to the protrusion 21a of the thermal insulation plate 21.

Again, a mesh cloth, a metal net, or the like is fully laid on the top surface of the hard die sleeve 22 to form a mesh layer 23.

Finally, the stirred gypsum self-leveling mortar is evenly poured on the grid layer 23.

Generally, a two-shot casting method may be employed.

Specifically, firstly, gypsum self-leveling mortar is poured onto the grid layer 23, the gypsum self-leveling mortar penetrates through the grid layer 23 and falls onto the surface of the hard die sleeve 22, and the pouring thickness is controlled to be about 0.5 cm-1 cm.

And after the first layer of gypsum self-leveling mortar is initially set, pouring the second layer of gypsum self-leveling mortar to the construction marking, namely finishing the construction.

And drying and hardening the gypsum self-leveling mortar subjected to the twice pouring to form the gypsum self-leveling layer 24.

In the anti-cracking ground composite heat-insulating structure provided by the utility model, when the gypsum self-leveling layer is subjected to external pressure, the external pressure is firstly transmitted to the hard die sleeve through the gypsum self-leveling layer, and then the hard die sleeve uniformly transmits the external pressure to the heat-insulating plate at the bottom, so that the problem of hollowing cracking of the heat-insulating structure caused by local stress concentration can be effectively reduced.

While the utility model has been shown and described with reference to certain embodiments, those skilled in the art will appreciate that: various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (8)

1. The composite heat-insulating structure for the anti-cracking ground is characterized by comprising a heat-insulating plate, a hard die sleeve, a grid layer and a gypsum self-leveling layer which are sequentially laminated on a concrete base layer;

the top surface of the heat insulation board is provided with a plurality of bulges which are arranged at intervals, and each bulge consists of a supporting part and a hooking part; the width of the bottom end of the hooking part connected with the supporting part is larger than the width of the top end of the hooking part and the width of the supporting part; the hard die sleeve is sleeved on the top surface of the heat insulation plate; the grid layer is laid on a plane where the top end of the hard die sleeve is located; the gypsum self-leveling layer is located in the space above the grid layer and between the grid layer and the hard die sleeve.

2. The crack-resistant ground composite insulation structure according to claim 1, wherein the thickness of the insulation board at the bottom of the insulation board except the protrusions is 0.5 cm-6 cm; the height of the bulge is 1 cm-3 cm, and the width of the supporting part is 1 cm-5 cm; the distance between two adjacent bulges is 2 cm-20 cm.

3. The crack resistant floor composite insulation structure of claim 2, wherein the insulation board is a polystyrene board or an extruded board.

4. The crack-resistant ground composite insulation structure of claim 1, wherein the hard die sleeve is a hard PVC plastic plate, PP plastic plate, PE plastic plate, PS plastic plate or ABS plastic plate; and/or the thickness of the hard die sleeve is 0.3 mm-3 mm.

5. The crack resistant floor composite insulation structure of claim 1, wherein the mesh layer is mesh cloth or metal mesh.

6. The anti-cracking floor composite heat preservation structure according to claim 5, wherein the grid cloth is alkali-resistant glass fiber grid cloth, and the metal net is an iron net or a stainless steel net.

7. The anti-cracking ground composite heat-insulating structure according to claim 1, wherein the gypsum self-leveling layer is made of self-leveling mortar with sand or sand-free paste, the absolute compression strength of which is not less than 20MPa and the dimensional change rate of which is not more than +/-0.05%.

8. The crack resistant floor composite insulation structure of claim 7, wherein the gypsum self-leveling layer has a thickness of 2cm to 6cm.