Regenerated asphalt reduction pavement structure

Abstract

The utility model discloses a recycled asphalt reduction pavement structure, which belongs to the technical field of pavement reduction and comprises a bottom surface layer, a bonding layer, a gravel layer, an asphalt macadam layer and a recycled reduction layer which are sequentially paved from bottom to top, the bonding layer is used for bonding the bottom surface layer and the gravel layer; the gravel layer comprises natural sand gravels; the natural sand gravel is laid on the bonding layer, and the lower end of the natural sand gravel is immersed in the bonding layer; the asphalt macadam layer comprises an asphalt matrix and macadam; the macadam is immersed in the asphalt matrix to form an asphalt macadam layer, so that the effects of bearing and dispersing load are achieved; the regeneration reduction layer comprises an old milling material, modified asphalt and a reducing agent; the reducing agent is used for reducing asphalt in the old milling material and is mixed with the modified asphalt to form a new pavement. The utility model has the advantages of cost reduction and benefit increase, has simple structure, high strength, strong toughness, fast construction speed and short maintenance time, and simultaneously improves the overall image of the pavement.

Description

Technical Field

[0001] This utility model belongs to the field of road restoration technology, and more specifically relates to a recycled asphalt road restoration structure. Background Technology

[0002] Asphalt resurfacing technology is suitable for old asphalt pavements requiring resurfacing. This technology involves excavating, recycling, crushing, and screening the old asphalt pavement, then remixing it with a reducing agent, new asphalt materials, and new aggregates in a specific ratio to obtain a recycled asphalt mixture that meets certain road performance requirements. This recycled asphalt mixture is then used to repave the road surface. Asphalt resurfacing is widely used in the repair and maintenance of various asphalt pavements, including highways, urban roads, and rural roads. Its advantages include ease of operation, rapid curing, environmental friendliness, economy, and improved performance. Using asphalt reducing agents can effectively improve the smoothness, durability, and safety of the pavement, while reducing road maintenance costs.

[0003] Therefore, how to provide a recycled asphalt pavement structure is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a recycled asphalt pavement structure for repairing aging and damaged roads, which has the advantages of cost reduction and efficiency improvement.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A recycled asphalt pavement structure includes, from bottom to top, a base layer, a bonding layer, a gravel layer, an asphalt macadam layer, and a recycled pavement layer; the bonding layer is used to bond the base layer and the gravel layer; the gravel layer includes natural gravel; the natural gravel is laid on the bonding layer with its lower end immersed in the bonding layer; the asphalt macadam layer includes an asphalt matrix and crushed stone; the crushed stone is immersed in the asphalt matrix to form the asphalt macadam layer, which plays a role in bearing and dispersing loads; the recycled pavement layer is used to form a new pavement.

[0007] Furthermore, the adhesive layer is made of non-stick wheel adhesive oil.

[0008] Furthermore, the particle size of the natural sand and gravel is 12-20mm; the thickness of the sand and gravel layer is not less than 30cm.

[0009] Furthermore, the asphalt matrix is ​​selected from 70# matrix asphalt, and the aggregate particle size is 10-15mm; the thickness of the asphalt aggregate layer 3 is not less than 20cm.

[0010] Furthermore, the recycled restoration layer includes old milled material, modified asphalt, and a reducing agent; the old milled material is immersed in the modified asphalt and the reducing agent; the reducing agent is used to reduce the asphalt in the old milled material and mixes with the modified asphalt to form a new road surface.

[0011] Furthermore, the regenerated layer is a three-tiered material with particle sizes of 0-3mm, 5-10mm, or 10-15mm; the thickness of the regenerated layer is not less than 10cm.

[0012] Furthermore, the modified asphalt is selected from ID type SBS modified asphalt.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention provides a recycled asphalt pavement structure suitable for the repair of pavement structures such as highways, urban roads, and rural roads. It utilizes recycled resources, greatly reducing repair costs. The structure is simple, with high strength and toughness, fast construction speed, short maintenance time, and improved overall pavement appearance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] In the figure:

[0018] 1-Base layer; 2-Adhesive layer; 3-Gravel layer; 4-Asphalt macadam layer; 5-Recycled and restored layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see the appendix Figure 1 This utility model provides a recycled asphalt pavement structure, which includes a bottom layer 1, a bonding layer 2, a gravel layer 3, an asphalt crushed stone layer 4 and a recycled pavement 5 laid sequentially from bottom to top.

[0021] The bottom layer 1 is a milled road surface sub-base.

[0022] The adhesive layer 2 is laid on the bottom layer 1 to bond the bottom layer 1 and the gravel layer 3, making the two layers bond more firmly and preventing rapid cracking. The adhesive layer 2 is made of non-stick wheel tack oil, and 70# road petroleum is usually used during construction. It is emulsified after being modified with SBS.

[0023] The gravel layer 3 comprises natural gravel; the natural gravel is laid on the bonding layer 2, with its lower end immersed in the tack coat oil of the bonding layer 2, making the gravel layer 3 and the bonding layer 2 bond more firmly; a large gap is formed between the natural gravel and the bonding layer 2, which can play a role in drainage and ventilation. The particle size of the natural gravel is 12-20mm; the thickness of the gravel layer 3 is not less than 30cm.

[0024] The asphalt macadam layer 4 is laid on the gravel layer 3 and includes an asphalt matrix and crushed stone; the crushed stone is immersed in the asphalt matrix to form the asphalt macadam layer 4, which plays the role of bearing and dispersing the load; the asphalt matrix is ​​selected from 70# matrix asphalt, and the particle size of the crushed stone is 10-15mm; the thickness of the asphalt macadam layer 3 is not less than 20cm.

[0025] The recycled and restored layer 5 is laid on the asphalt macadam layer 4 and is composed of old milled aggregate, modified asphalt, and a reducing agent. The recycled and restored layer 5 mainly utilizes the asphalt from the old milled aggregate to restore the original properties of the asphalt, meeting road requirements. Simultaneously, the recycled and restored layer 5 also provides anti-skid and wear-resistant properties, offering good load-bearing capacity and smoothness, ensuring driving comfort and safety, and improving the overall appearance of the road surface. The modified asphalt used is ID-type SBS modified asphalt. The recycled and restored layer 5 consists of three grades of material with particle sizes of 0-3mm, 5-10mm, and 10-15mm respectively; the thickness of the recycled and restored layer 5 is not less than 10cm.

[0026] The method for manufacturing the recycled asphalt pavement structure of this utility model is as follows:

[0027] Step 1: Mill the original road surface down to the bottom layer 1, and use high-pressure cleaning equipment to clean all the debris on the bottom layer 1.

[0028] Step 2: Spray tack coat onto the base layer using a spraying device to form tack coat 2; while tack coat 2 is still slightly dry, lay natural gravel on tack coat 2 and compact it to form gravel layer 3; gravel layer 3 is 30cm thick.

[0029] Step 3: After the gravel layer 3 is completed, asphalt macadam is laid on the surface of the gravel layer 3 using paving equipment to form asphalt macadam layer 4. It is then compacted using a 13t road roller, and the thickness of asphalt macadam layer 4 is 20cm.

[0030] Step 4: One hour after the completion of the asphalt macadam layer 4, the recycled material, which is a mixture of old milled material, ID type SBS modified asphalt, and reducing agent, is spread on the asphalt macadam layer 4 to form the recycled reduction layer 5. It is then compacted with a 13t road roller, and the recycled reduction layer 5 is 10cm thick.

[0031] Step 4: Traffic can only be opened 2 hours after the completion of the construction of the regeneration and restoration layer 5.

[0032] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reclaimed asphalt reduced pavement structure, characterized by, It comprises bottom layer (1), adhesive layer (2), sand layer (3), asphalt macadam layer (4) and regenerated layer (5) laid from bottom to top in turn; the adhesive layer (2) is used for bonding the bottom layer (1) and the sand layer (3); the sand layer (3) comprises natural sandstone; the natural sandstone is laid on the adhesive layer (2) and the lower end is immersed in the adhesive layer (2); the asphalt macadam layer (4) comprises asphalt matrix and gravel; the gravel is immersed in the asphalt matrix to form the asphalt macadam layer (4) and play the role of bearing and dispersing load; the regenerated layer (5) is used for forming new pavement.

2. A reclaimed asphalt reduced pavement structure according to claim 1, wherein, The adhesive layer (2) selects non-stick wheel adhesive layer oil.

3. A reclaimed asphalt reduced pavement structure according to claim 1, wherein, The particle size of the natural sandstone is 12-20 mm; the thickness of the sand layer (3) is not less than 30 cm.

4. A reclaimed asphalt reduced pavement structure according to claim 1, wherein, The asphalt matrix selects 70# matrix asphalt and the particle size of the gravel is 10-15 mm; the thickness of the asphalt macadam layer (3) is not less than 20 cm.

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