CN104805750B - Suitable for the manufacture method of the compound anti-antistructure of Heavy Traffic condition - Google Patents

Abstract

The invention belongs to the technical field of prevention and treatment of reflective cracks on road surfaces, and is a composite anti-reverse structure suitable for heavy-duty traffic conditions. The wrapped sealing adhesive layer, the high tensile material layer is stainless steel wire mesh, and the sealing adhesive layer is HZ/ZD‑4 shrinkage caulking material layer. This composite anti-reverse structure has good reinforcement effect, high anti-reverse performance and high quality. Controllable, excellent anti-reverse effect in heavy traffic conditions. The invention also discloses a manufacturing method and application of the composite anti-reverse structure.

Description

Method for manufacturing composite anti-reverse structure suitable for heavy-duty traffic conditions

technical field

The invention belongs to the technical field of prevention and treatment of reflective cracks on road surfaces.

Background technique

The composite pavement uses the cement concrete panel as the rigid base, and the asphalt mixture flexible surface layer is paved on it, which has the advantages of good durability, high bearing capacity, comfortable driving and low noise. However, due to the differences in the materials of cement concrete and asphalt mixture, the elastic modulus of cement concrete is usually 15 to 20 times that of asphalt mixture, resulting in different stress and strain characteristics of the two under the action of load stress and temperature stress. , Cracks are easy to occur under temperature and humidity changes or driving loads, and expand to the surface layer to make the surface layer crack. The cracks on this surface layer are called reflective cracks, which are one of the main road hazards of semi-rigid pavement and rigid pavement.

In order to prevent the occurrence of reflective cracks, since the 1960s, scholars and engineering professionals from various countries have carried out a large number of experimental studies on the problem of reflective cracks, and have developed a variety of anti-reflective technologies to delay or prevent reflective cracks. The anti-reflection methods used include: ① add geotextile and grid as the anti-reflection crack layer; ② add rubber asphalt-gravel isolation layer as the anti-reflection crack layer.

The disadvantages of the above two methods are: ①The tensile strength of geotextiles and grids is usually only 25~50kN/m, which are easy to be broken under tension, and the effect of reinforcement is not obvious, and even partly The geotextile and geogrid have been pulled off, and the anti-crack performance in the later stage has declined significantly, and the expected anti-reverse effect cannot be achieved. Moreover, when the construction joints are large or the surface flatness of the cement concrete slab cannot meet the requirements, the geotextile and geogrid Weakly reinforced materials such as grids are easily punctured by sharp gravel during construction, and their anti-reverse performance is low. ②The rubber asphalt-gravel isolation layer needs to be cast and used at the construction site. The cleanliness of the gravel and the amount of rubber asphalt spreading will have a great impact on the interlayer bonding performance and the anti-reflection performance of the road surface, and the quality is difficult to control.

It is worth noting that in recent years, with the continuous increase of highway traffic volume and vehicle axle load, overloaded and overrun transportation has been repeatedly prohibited. The anti-reverse effects of the above two traditional anti-reverse methods are even worse, and it is difficult to meet road use requirements.

Contents of the invention

The invention intends to provide a composite anti-reverse structure suitable for heavy-duty traffic conditions with good reinforcement effect, high anti-reverse performance and controllable quality.

Patent solution: Composite anti-reverse structure suitable for heavy-duty traffic conditions, set on the cement concrete base, including a high-tensile material layer, and a sealing adhesive layer that wraps the high-tensile material layer as a whole.

The beneficial effects of this patent are: ①The tensile strength (horizontal or longitudinal) of the high-tensile material layer in the present invention is as high as 200kN/m, not easy to break, and has a strong reinforcing effect; ②The high-tensile material layer has extremely strong tensile strength The tensile strength makes this composite anti-reverse structure have a high ability to limit deformation (that is, low elongation). Even if there are micro-cracks on the road surface in the early stage, the anti-reverse structure can also limit the further expansion of cracks; ③ The sealing adhesive layer adheres and Wrap the high-tensile material layer as a whole, avoiding the air, moisture, dirt, etc. in the environment from contacting the high-tensile material layer, preventing the high-tensile material layer from being oxidized or corroded. In addition, the sealing adhesive layer has a certain toughness , which improves the bonding performance between the composite anti-reverse structure and the upper and lower interface layers (the upper interface layer refers to the asphalt surface layer, and the lower interface layer refers to the cement concrete base). ④The composite anti-reverse structure is mass-produced in the factory, which saves on-site construction time, and the quality of the product itself is not affected by the road site construction environment, which improves the controllability of product quality.

Furthermore, the melting temperature of the high-tensile material layer and the sealing adhesive layer are both higher than the melting temperature of the asphalt pavement, so as to prevent the composite anti-reverse structure from changing during construction (the temperature of the asphalt pavement is relatively high during construction). , such as curls, depressions, potholes, etc.

Further, the high-tensile material layer is stainless steel wire mesh or galvanized iron mesh or high-strength carbon fiber mesh or high-strength plastic mesh, all of which have high tensile properties, and can be selected according to actual conditions.

Further, the sealing adhesive layer is a HZ/ZD-4 shrinkage caulking material layer or an anti-corrosion adhesive layer, and the HZ/ZD-4 shrinkage caulking material layer (which is liquid at room temperature and solidifies in air) is selected. It is easy to construct without heating, ready to use, and the construction is very convenient. Secondly, the HZ/ZD-4 shrinkage caulking material has good fluidity at room temperature, strong penetration, and good adhesion to the high tensile material layer; thirdly, HZ/ZD-4 shrinkage caulking material has high density after curing, which can effectively protect the inner high tensile material layer and prevent oxidation or corrosion of the high tensile material layer. It is worth noting that HZ/ZD-4 shrinkage caulking material After curing, the toughness is higher, and the effect of absorbing stress is better; if the anti-corrosion adhesive layer is selected, the fluidity of the anti-corrosion adhesive is also high in liquid state, and the adhesion effect with the high-tensile material layer is better, and the density and toughness of the anti-corrosion adhesive after curing are also good higher.

Furthermore, since the maximum temperature of asphalt mixture is 210°C (higher than 210°C is waste), the melting temperature of the high tensile material layer and the sealing adhesive layer is greater than 230°C, which can avoid The mutation occurs when the mixture is made).

The invention also provides the application of a composite anti-reverse structure suitable for heavy-duty traffic conditions.

Patent solution: An application of a composite anti-reverse structure suitable for heavy-duty traffic conditions. The bottom surface of the composite anti-reverse structure is bonded to the cement concrete base, and then an asphalt surface layer is added on the top surface of the composite anti-reverse structure. .

Beneficial effects: the composite anti-reverse structure is transported to the site after the factory is manufactured, the composite anti-reverse structure is directly bonded to the cement concrete base, and then paved with asphalt surface, so that the anti-reverse layer does not need to be manufactured at the construction site, The quality of the composite anti-reverse structure itself is not affected by the construction environment of the road site, and the quality of the product is uniform and controllable; in addition, the composite anti-reverse structure has a low elongation rate and a strong ability to limit deformation. Progressive expansion, better anti-reverse effect.

Further, the composite anti-reverse structure is bonded to the cement concrete base by polyurethane adhesive or epoxy binder or hot asphalt or high-viscosity emulsified asphalt.

The invention also provides a method for manufacturing a composite anti-reverse structure suitable for heavy-duty traffic conditions with good reinforcement effect, high anti-reverse performance and controllable quality.

Patent solution: a method for manufacturing a composite anti-reverse structure suitable for heavy-duty traffic conditions, including the following steps:

① Customize the forming mold according to the thickness requirement;

② Brush the release agent on the inner surface of the mold;

③ Place the high tensile material layer in the side groove of the mold;

④ Pour the liquid sealing adhesive material until it completely wraps the high-tensile material layer to form a sealing adhesive layer; the melting temperature of the high-tensile material layer and the sealing adhesive layer are both higher than the melting temperature of the asphalt surface layer;

⑤Let it stand for 4 hours to demould, and complete the manufacture of the composite anti-reverse structure.

Beneficial effects: the liquid sealing adhesive material is poured into the mold, and the high-tensile material is completely wrapped, so that the high-tensile material layer is isolated from the external environment, and the composite anti-reverse structure is formed after solidification and hardening. This method ensures High-strength reinforcement materials are not corroded or oxidized internally. The melting temperature of the high-tensile material layer and the sealing adhesive layer is greater than 230°C, which can avoid abnormal deformation when laying the asphalt surface layer (made of asphalt mixture).

Further, the sealing and adhesive material is HZ/ZD-4 shrinkage caulking material, and the liquid HZ/ZD-4 shrinkage caulking material will quickly solidify in contact with air at normal temperature to form a sealing and adhesive layer.

Furthermore, the composite anti-reverse structure has a thickness of 3mm, which can meet the anti-reverse performance requirements of ordinary asphalt pavement and asphalt pavement under heavy traffic conditions.

Furthermore, for the aesthetics of the composite anti-reverse structure, the release agent is a colorless and transparent release agent, such as transparent soybean oil, silicone oil, silicone grease, etc.

Description of drawings

Fig. 1 is a structural schematic diagram of the composite anti-reverse structure suitable for heavy-duty traffic conditions according to the present invention.

detailed description

The present invention will be described in further detail below by means of specific embodiments:

Example 1

The composite anti-reverse structure suitable for heavy-duty traffic conditions is basically shown in Figure 1: the composite anti-reverse structure suitable for heavy-duty traffic conditions is located between the cement concrete base and the asphalt surface, including stainless steel wire mesh 2, and The HZ/ZD-4 shrinkage caulking material layer 1 that wraps the stainless steel wire mesh 2 as a whole.

The composite anti-reverse structure disclosed in this embodiment has excellent flexibility, and no deformation or damage will occur when it is bent 180° around the central axis.

The HZ/ZD-4 shrinkage caulking material layer 1 in this embodiment can be replaced by an anti-corrosion adhesive layer, and the stainless steel wire mesh 2 can be replaced by a galvanized iron mesh or a high-strength carbon fiber mesh or a high-strength plastic mesh. The materials used in the above-mentioned composite anti-reverse structure, such as HZ/ZD-4 shrinkage caulking material layer, anti-corrosion adhesive layer, stainless steel wire mesh, galvanized iron mesh, high-strength carbon fiber mesh, and high-strength plastic mesh, have melting temperatures greater than 230°C, which can prevent this When the composite anti-reverse structure is paved with asphalt surface, abnormal changes occur, such as curls, depressions, potholes, etc.

Example 2

Application of composite anti-reverse structure suitable for heavy-duty traffic conditions: use polyurethane adhesive (or epoxy cement or hot asphalt or high-viscosity emulsified asphalt) to bond the bottom surface of the composite anti-reverse structure in Example 1 to cement On the concrete base, the asphalt surface layer is added on the top surface of the composite anti-reverse structure.

Example 3

A method for manufacturing a composite anti-reverse structure suitable for heavy-duty traffic conditions, comprising the following steps:

① Customize the forming mold according to the thickness requirement;

② Brush transparent soybean oil on the inner surface of the mold;

③ Place the stainless steel wire mesh in the side groove of the mold;

④ Pour HZ/ZD-4 shrinkage caulking material into the side groove of the mold at room temperature, so that it is completely wrapped and adhered to the stainless steel wire mesh to form a sealed adhesive layer. The curing principle of HZ/ZD-4 shrinkage caulking material is: HZ/ZD-4 shrinkage caulking material is sealed in a plastic bucket, and it is in a fluid state at room temperature (about 25°C), and it will cure when it meets air.

⑤Stay for 4 hours to demould, and complete the manufacture of the composite anti-reverse structure, the final thickness of the composite anti-reverse structure is 3mm.

Note: "composite anti-reverse structure" in this manual is the abbreviation of "composite anti-reverse structure suitable for heavy-duty traffic conditions". "Hot asphalt" refers to ordinary asphalt heated to a molten state (about 130°C). The "asphalt pavement" is made of asphalt mixture composed of hot asphalt, crushed stone and filler (such as mineral powder), and the maximum temperature is about 210°C. "Anti-reflection layer" is the abbreviation of "anti-reflection crack layer".

What has been described above is only an embodiment of the present invention, and common knowledge such as specific structures, characteristics, and basic methods known in the scheme will not be described here too much. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present invention, several modifications and improvements can also be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (5)

1. A method for manufacturing a composite anti-reverse structure suitable for heavy-duty traffic conditions, comprising the following steps: ① Customize the forming mold according to the thickness requirement; ② Brush the release agent on the inner surface of the mold; ③ Place the high tensile material layer in the side groove of the mold; ④ pouring the liquid sealing adhesive material, until it completely wraps the high tensile material layer to form a sealing adhesive layer, the melting temperature of the high tensile material layer and the sealing adhesive layer are both greater than the melting temperature of the asphalt surface layer; ⑤Let it stand for 4 hours to demould to complete the manufacture of the composite anti-reverse structure; when in use, bond the bottom surface of the composite anti-reverse structure to the cement concrete base, and then add an asphalt surface layer on the top surface of the composite anti-reverse structure. 2. The method for manufacturing a composite anti-reverse structure suitable for heavy-duty traffic conditions according to claim 1, characterized in that: the high tensile material layer is stainless steel wire mesh or galvanized iron mesh or high-strength carbon fiber mesh or high-strength plastic network. 3. The manufacturing method of the composite anti-reverse structure suitable for heavy-duty traffic conditions according to claim 2, characterized in that: the sealing and adhesive material is HZ/ZD-4 shrinkage caulking material. 4. The manufacturing method of the composite anti-reverse structure suitable for heavy-duty traffic conditions according to claim 2 or 3, characterized in that: the thickness of the composite anti-reverse structure is 3mm. 5. The manufacturing method of the composite anti-reverse structure suitable for heavy-duty traffic conditions according to claim 2 or 3, characterized in that: the release agent is a colorless and transparent release agent.