CN210062276U

CN210062276U - High-temperature-resistant geotextile

Info

Publication number: CN210062276U
Application number: CN201920258060.1U
Authority: CN
Inventors: 王超
Original assignee: Zhejiang Chaoshi Date Textile Co Ltd
Current assignee: Zhejiang Chaoshi Date Textile Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-02-14
Anticipated expiration: 2029-02-28

Abstract

The utility model discloses a high temperature resistant geotextile, which comprises a base cloth layer and a polyester fiber net layer compounded with the base cloth layer; the first warp yarns are polypropylene with an oval cross section, and the first weft yarns are polypropylene with an oval cross section; the second warp yarns are glass filaments with circular sections, and the second weft yarns are glass filaments with circular sections; the first warp yarns and the first weft yarns are interwoven up and down, and the second warp yarns and the second weft yarns are interwoven up and down to form a double-layer structure. The utility model relates to a high temperature resistant geotechnological cloth has used polyester and polypropylene fiber, can prevent to produce the shrinkage deformation under the high temperature when pitch paves, can guarantee the stability of geotechnological cloth performance itself. The asphalt surface layer structure paved with the geotextile has low elongation loss and high strength, can be connected with the road surfaces at two sides to work simultaneously, so that cracks are slowly developed, and the maintenance period of the road surface is effectively prolonged while the road surface is attractive and comfortable.

Description

High-temperature-resistant geotextile

Technical Field

The utility model belongs to the technical field of the textile technology is used in the industry and specifically relates to a high temperature resistant geotechnological cloth.

Background

Cement concrete has been widely used at home and abroad as a main building material in structural engineering. However, because general cement concrete has the defects of easy shrinkage cracking, low tensile and flexural strength, poor toughness, large brittleness, low impact resistance and the like in the application process, the traffic safety can be affected to different degrees by the cement pavements which are overhauled for some years. In order to make up for the defects, people often adopt to directly lay an asphalt surface layer on the original cement pavement. Although the pavement after being paved can achieve the purposes of beauty and comfort, the pavement structure can not effectively prevent the reflection cracks of the base layer, and the cracks are more, dense and wide, so that the maintenance period of the road is shortened.

The geotextile used has high requirements on high temperature resistance, high tensile strength, good uniformity, strong permeability, high thickness, high chemical resistance and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high temperature resistant geotechnological cloth can satisfy the requirement when laying to bituminous paving.

In order to solve the technical problem, the purpose of the utility model is to realize like this:

the utility model relates to a high temperature resistant geotextile, which comprises a base cloth layer and a polyester fiber net layer compounded with the base cloth layer; the base cloth layer is formed by interweaving warp yarns and weft yarns; the warp yarns comprise a first warp yarn and a second warp yarn, and the weft yarns comprise a first weft yarn and a second weft yarn; the first warp yarns are polypropylene with an oval cross section, and the first weft yarns are polypropylene with an oval cross section; the second warp yarns are glass filaments with circular sections, and the second weft yarns are glass filaments with circular sections;

the first warp and the first weft are interwoven up and down, and the second warp and the second weft are interwoven up and down to form a double-layer structure; four weft yarns are a cycle, and are a first weft yarn, a second weft yarn and a first weft yarn in sequence; the first two weft yarns are the first weft yarns over the second weft yarns, and the last two weft yarns are the second weft yarns over the first weft yarns;

the thickness of the polyester fiber net is 0.5-1mm, and the surface density is 50-100 g per square meter.

As a further illustration of the above scheme, the length of the major axis of the oval cross section of the first warp yarns and the first weft yarns is 28-35 filaments, and the length of the minor axis is 15-20 filaments; the second warp yarns and the second weft yarns have a diameter of 20-25 filaments.

As a further explanation of the above solution, the number of the polyester fiber net layers is two, and the two polyester fiber net layers are respectively located on two sides of the base fabric layer.

As a further explanation of the above aspect, the polyester fiber web layer is combined with a short glass fiber layer on one side; the thickness of the short glass fiber layer is 1-2mm, and the surface density is 80-120 g per square meter.

Because the geotextile has high tensile strength and elongation, the horizontal displacement transferred from the concrete slab to the overlaying layer can be dispersed and reduced, and the stress concentration at the bottom of the asphalt layer is effectively reduced, thereby inhibiting and delaying the generation and development of reflection cracks and improving the fatigue resistance of the asphalt layer to temperature load. After the reflection cracks are communicated, the road surfaces on two sides of the cracks basically work independently, the crack width is increased rapidly along with the load action, and after the reflection cracks are communicated, the road surface structure with the geotechnical cloth can be connected with the road surfaces on two sides to continue working due to the good elongation rate and high strength of the geotechnical cloth, so that the cracks develop slowly (the crack width and the crack quantity). The geotextile absorbs stress by means of deformation and diffusion of the geotextile at the early stage, and delays the generation of the reflection cracks, and the geotextile inhibits the expansion of the reflection cracks by means of the strength of the geotextile at the later stage.

The utility model has the advantages that: the utility model relates to a high temperature resistant geotechnological cloth has used polyester and polypropylene fiber, can prevent to produce the shrinkage deformation under the high temperature when pitch paves, can guarantee the stability of geotechnological cloth performance itself. The polypropylene used enables the geotextile to have the tensile strength of more than 8KN/M2, and can meet the requirements of the geotextile. And the fibre layers used can be saturated with a substantially uniform degree of absorption of the bitumen. The asphalt surface layer structure paved with the geotextile has low elongation loss and high strength, can be connected with the road surfaces at two sides to work simultaneously, so that cracks are slowly developed, and the maintenance period of the road surface is effectively prolonged while the road surface is attractive and comfortable.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic view of the structure of a base fabric;

FIG. 3 is a schematic structural view of the second embodiment;

FIG. 4 is a schematic structural diagram of the third embodiment.

The designations in the figures illustrate the following: 1-a base fabric layer; 2-a polyester fiber web layer; 21-a penetration hole; 3-a glass fiber layer; 11-a first warp yarn; 12-a second warp yarn; 13-a first weft yarn; 14-a second weft yarn;

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example one

This embodiment will be described in detail with reference to fig. 1 and 2. The high-temperature-resistant geotextile according to the embodiment comprises a base fabric layer 1 and a polyester fiber mesh layer 2 compounded with the base fabric layer 1. The base fabric layer 1 is formed by interweaving warp yarns and weft yarns, wherein the warp yarns comprise first warp yarns 11 and second warp yarns 12, and the weft yarns comprise first weft yarns 13 and second weft yarns 14. The first warp yarn 11 is polypropylene having an oval cross section, and the first weft yarn 13 is polypropylene having an oval cross section; the second warp yarns 12 are glass filaments having a circular cross-section, and the second weft yarns 14 are glass filaments having a circular cross-section.

In this embodiment, the first warp yarn 11 and the first weft yarn 13 are interwoven one on top of the other, and the second warp yarn 12 and the second weft yarn 14 are interwoven one on top of the other, forming a double-layer structure. Four weft yarns are in a cycle, and are sequentially a first weft yarn 13, a second weft yarn 14 and the first weft yarn 13; the first two weft yarns are first weft yarns 13 over second weft yarns 14, and the last two weft yarns are second weft yarns 14 over first weft yarns 13;

the thickness of the polyester fiber net layer 2 is 0.5-1mm, and the surface density is 50-100 g per square meter. The polyester fiber net layer 2 is formed by carding by a carding machine and is compounded with the base cloth layer 1 by needling or is formed by quilting by polyester filaments.

In this embodiment, the lengths of the major axes of the elliptical cross sections of the first warp yarns 11 and the first weft yarns 13 are 28 to 35 filaments, and the lengths of the minor axes are 15 to 20 filaments; the second warp yarns and the second weft yarns have a diameter of 20-25 filaments.

Furthermore, a plurality of permeation holes can be arrayed on the polyester fiber layer, so that the permeation into the fiber can be smoothly carried out during asphalt paving.

Example two

The high temperature-resistant geotextile according to the present embodiment will be described in detail with reference to fig. 2 and 3. The difference between the high temperature-resistant geotextile according to the present embodiment and the first embodiment is that one polyester fiber web layer 2 is also provided on the other side of the base fabric layer 1, that is, in the present embodiment, two polyester fiber web layers 2 are provided, and are respectively located on both sides of the base fabric layer 1. And the two polyester fiber net layers 2 are provided with penetration holes 21.

EXAMPLE III

The high temperature-resistant geotextile according to the present embodiment will be described in detail with reference to fig. 2 and 4. The difference between the high temperature resistant geotextile according to the present embodiment and the second embodiment is that a glass short fiber layer 3 formed of glass short fibers is provided between the polyester fiber mesh layer 2 and the base fabric layer 1, and the glass short fiber layer 3 can resist higher temperature and is more corrosion resistant. In the embodiment, the short glass fiber layer 3 is provided with penetration holes 21 at positions corresponding to the polyester fiber layer 2, so that the asphalt can penetrate into the geotextile. In this example, the layer of glass staple fibers has a thickness of 1 to 2mm and an areal density of 80 to 120 grams per square meter.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A high-temperature-resistant geotextile is characterized by comprising a base cloth layer and a polyester fiber net layer compounded with the base cloth layer; the base cloth layer is formed by interweaving warp yarns and weft yarns; the warp yarns comprise a first warp yarn and a second warp yarn, and the weft yarns comprise a first weft yarn and a second weft yarn; the first warp yarns are polypropylene with an oval cross section, and the first weft yarns are polypropylene with an oval cross section; the second warp yarns are glass filaments with circular sections, and the second weft yarns are glass filaments with circular sections;

2. The high temperature-resistant geotextile of claim 1, wherein the first warp yarns and the first weft yarns have elliptical cross-sections with a major axis of 28 to 35 filaments and a minor axis of 15 to 20 filaments; the second warp yarns and the second weft yarns have a diameter of 20-25 filaments.

3. The high temperature-resistant geotextile of claim 1, wherein said polyester fiber web layers are two in number and are positioned on both sides of said base fabric layer.

4. The high-temperature-resistant geotextile of any of claims 1-3, wherein said polyester fiber web layer is compounded with a glass short fiber layer on one side; the thickness of the short glass fiber layer is 1-2mm, and the surface density is 80-120 g per square meter.