Rigid base asphalt pavement capable of actively deicing

Abstract

The utility model discloses a rigid base asphalt pavement capable of actively deicing, which is characterized in that the lowest layer of the pavement structure is a subbase, the upper part of the subbase is a rigid base, the upper part of the rigid base is modified asphalt mortar, the upper part of the modified asphalt mortar is an assembled rubber block system, and the upper part of the assembled rubber block system is modified asphalt mortar. A modified asphalt wearing layer is arranged on the upper portion of the modified asphalt mortar, the rubber block splicing system comprises rubber blocks and double-layer geogrids, the geogrids are located on the upper portions and the lower portions of the rubber blocks respectively, and the multiple rubber blocks are spliced through a mortise and tenon joint structure. According to the pavement structure disclosed by the utility model, due to the use of the elastic asphalt mortar and the assembled rubber block system, the flexibility of a pavement layer of the pavement structure is increased, the deformation is increased under a driving load, an icing layer on a road surface can be actively broken, and an active deicing function is realized.

Description

Technical Field

[0001] The utility model relates to the field of pavement structure, in particular to a rigid base asphalt pavement with active deicing. Background Art

[0002] In winter, more than 70% of the roads in my country will be affected by ice and snow, especially those above the snow line. Snowfall can cause vehicles to slip, deflect, and extend the braking distance, resulting in endless traffic accidents. At present, there are two types of snow removal methods. One is passive snow removal, which uses chemical snow melting agents and mechanical snow removal. The main disadvantages are that it affects the normal operation of the road during snow removal and the snow removal efficiency is low; the other is active snow removal. Active snow removal methods can be mainly divided into three categories. One is to add rubber particles to the asphalt pavement layer to replace aggregates and increase the flexibility and elasticity of the road surface, but there are problems such as complex process and poor durability. The second category is to add low freezing point materials to asphalt concrete, but there are problems such as performance attenuation. The third category is energy conversion pavement, which buries heat transfer pipelines inside the pavement, which has problems such as high cost, immature technology, and difficult maintenance. Utility Model Content

[0003] The utility model aims to provide an active deicing rigid base asphalt pavement with the function of active snow melting and deicing, which has the characteristics of simple process and convenient maintenance.

[0004] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0005] An active deicing rigid base asphalt pavement, wherein the lowest layer of the pavement structure is a subbase, the upper part of the subbase is a rigid base, the upper part of the rigid base is modified asphalt mortar, the upper part of the modified asphalt mortar is an assembled rubber block system, the upper part of the assembled rubber block system is modified asphalt mortar, and the upper part of the modified asphalt mortar is a modified asphalt wear layer.

[0006] Further technology of the utility model:

[0007] Preferably, the assembled rubber block system comprises rubber blocks and double-layer geogrids, the geogrids are respectively located at the upper and lower parts of the rubber blocks, and a plurality of rubber blocks are spliced ​​with mortise and tenon structures.

[0008] Preferably, a double layer of anti-cracking wire mesh is buried inside the rubber block.

[0009] The beneficial effects of the utility model are:

[0010] The use of asphalt mortar and assembled rubber block system in the pavement structure of the utility model increases the flexibility of the pavement layer of the pavement structure, and increases deformation under driving load, which is conducive to actively breaking the ice layer on the road surface and realizing the active deicing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 Overall diagram of the pavement structure of the utility model;

[0013] Figure 2 Assemble the rubber block system;

[0014] Figure 3 Schematic diagram of the inside of the rubber block;

[0015] Figure 4 Schematic diagram of rubber block;

[0016] The symbols in the figure are: 1-base layer; 2-rigid base layer; 3-modified asphalt mortar; 4-assembled rubber block system; 5-modified asphalt mortar; 6-modified asphalt wearing layer; 7-geogrid; 8-rubber block; 9-wire mesh. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be further described in detail below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model but not all. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] like Figure 1-3 The present embodiment provides a rigid base asphalt pavement with active deicing, characterized in that the lowest layer of the pavement structure is a subbase 1, the upper part of the subbase 1 is a rigid base 2, the upper part of the rigid base 2 is a modified asphalt mortar 3 with a thickness of 1 to 2 cm, the upper part of the modified asphalt mortar 3 is an assembled rubber block system 4, the upper part of the assembled rubber block system 4 is a modified asphalt mortar 5 with a thickness of 1 to 2 cm, and the upper part of the modified asphalt mortar 5 is a modified asphalt wear layer 6 with a thickness of 2 to 4 cm.

[0019] The assembled rubber block system 4 comprises 1-2 cm rubber blocks 8 and double-layer geogrids 7. The geogrids 7 are respectively located at the upper and lower parts of the rubber blocks 8. The size of the rubber blocks 8 can be 0.5-2 m. The rubber blocks 8 are spliced ​​with mortise and tenon structures. A double-layer anti-cracking wire mesh 9 is buried inside the rubber blocks 8.

[0020] It should be noted that the rigid base layer 2 in the present invention has a much greater rigidity (modulus) than the asphalt layer thereon. Under vehicle load, the rigid base layer 2 mainly bears the main bending and tensile stress, and the asphalt layer on the rigid base layer 2 mainly controls the vertical pressure, shear stress, and interlayer shear stress. According to the mechanical distribution, from top to bottom, the modified asphalt wear layer 1 mainly solves the functions of anti-rutting, water-tightness, and anti-skid, and SMA-10 is recommended; the modified asphalt mortar 3 / 5 plays an effective role in bonding the rigid base layer 2, and also solves the interlayer shear and anti-rutting effects, and SMA-5 can be used.

[0021] The fine aggregate of the rigid base 2 is river sand. Compared with machine-made sand, the concrete material mixed with river sand has less floating dust, which is conducive to the bonding between layers. Before paving the asphalt layer, fine milling is carried out to remove the floating slurry.

[0022] The use of asphalt is beneficial to the anti-rutting function of modified asphalt mortar. At the same time, the high asphalt dosage of asphalt mortar (modified asphalt mortar has small aggregate particle size, large specific surface area, high asphalt dosage, and high asphalt viscosity, which is conducive to further increase in asphalt dosage) is beneficial to improving the flexibility of the modified asphalt mortar layer.

[0023] The rubber block 8 has the characteristics of good durability and flexibility. It is set in the impermeable modified asphalt mortar, and its durability is further increased. At the same time, the steel wire mesh 9 is set to increase its anti-cracking effect. The assembled rubber block system 4 is assembled by rubber blocks 8, which is conducive to increasing the flexibility of the layer (that is, the deformation increases under the vehicle load). At the same time, the geogrids 7 are set up above and below to prevent the generation of reflective cracks.

[0024] The modified asphalt mortar 5 is hot-laid at a temperature between 150 and 170° C., which will melt part of the rubber block 8 and the geogrid 7, further increasing the interlayer bonding strength; combined with the use of asphalt, the modified asphalt mortar 3 / 5 and the assembled rubber block system 4 form a whole.

[0025] The use of asphalt mortar and assembled rubber block system increases the flexibility of the pavement layer of the road structure. Under the driving load, the deformation increases, which is conducive to actively breaking the ice layer on the road surface and realizing the active deicing function.

[0026] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A rigid base asphalt pavement with active deicing, characterized in that: The lowest layer of the pavement structure is the subbase, the upper part of the subbase is the rigid base, the upper part of the rigid base is the modified asphalt mortar, the upper part of the modified asphalt mortar is the assembled rubber block system, the upper part of the assembled rubber block system is the modified asphalt mortar, and the upper part of the modified asphalt mortar is the modified asphalt wear layer.

2. According to the active deicing rigid base asphalt pavement of claim 1, it is characterized by: The assembled rubber block system comprises rubber blocks and double-layer geogrids, wherein the geogrids are respectively located at the upper part and the lower part of the rubber blocks, and a plurality of rubber blocks are spliced ​​by using mortise and tenon structures.

3. According to the active deicing rigid base asphalt pavement of claim 2, it is characterized by: A double-layer anti-cracking wire mesh is buried inside the rubber block.

Images