CN113073508A - Construction process for enhancing durability of square road of toll station - Google Patents
Construction process for enhancing durability of square road of toll station Download PDFInfo
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- CN113073508A CN113073508A CN202110374191.8A CN202110374191A CN113073508A CN 113073508 A CN113073508 A CN 113073508A CN 202110374191 A CN202110374191 A CN 202110374191A CN 113073508 A CN113073508 A CN 113073508A
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- asphalt
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a construction process for enhancing the durability of a square road of a toll station, which comprises the following steps: s1: paving a roadbed; s2: cleaning the surface of the roadbed, spraying a first asphalt bonding layer, and paving a cement stable crushed stone layer on the asphalt bonding layer; s3: spraying an asphalt waterproof layer on the cement stabilized gravel layer; s4: after the asphalt waterproof layer is dried, spraying a second asphalt bonding layer, and paving a coarse-graded asphalt concrete layer; s5: spraying a third asphalt bonding layer on the surface of the coarse-graded asphalt concrete layer, and paving the dense-graded asphalt concrete layer; s6: and spraying an anti-scattering asphalt layer on the dense-graded asphalt concrete layer. The construction process can improve the durability of the square pavement structure of the toll station.
Description
Technical Field
The invention relates to the field of highway construction, in particular to a construction process for enhancing the durability of a square road of a toll station.
Background
The toll station square is an indispensable part of an expressway, but because the pavement paving area is small, the durability of materials and the durability of structures of the conventional toll station square are not researched by combining the load characteristics of the toll station square during pavement construction, but the conventional toll station square is simply constructed along the road structure of a main line. However, in the construction of asphalt pavement in toll plazas, due to the excessive rolling action of a road roller or other heavy machinery, the damage, the loss and the like of an asphalt film are easily caused, and stone falling, crushing and the like can even be caused in severe cases, so that the local cohesive force of the asphalt mixture is reduced, the construction quality of the asphalt pavement is influenced, the service life of the pavement is shortened, and the damage to the drainage asphalt pavement is more serious. Therefore, it is necessary to provide a toll station square road construction scheme with good anti-scattering capability to improve the durability of the toll station square.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a construction process for enhancing the durability of the square road of the toll station so as to improve the durability of the square road surface structure of the toll station.
The purpose of the invention is realized by the following technical scheme:
a construction process for enhancing durability of a square road of a toll station comprises the following steps:
s1: paving a roadbed;
s2: cleaning the surface of the roadbed, spraying a first asphalt bonding layer, and paving a cement stable crushed stone layer on the asphalt bonding layer;
s3: paving an asphalt waterproof layer on the cement stabilized gravel layer;
s4: after the asphalt waterproof layer is dried, spraying a second asphalt bonding layer, and paving a coarse-graded asphalt concrete layer;
s5: spraying a third asphalt bonding layer on the surface of the coarse-graded asphalt concrete layer, and paving the dense-graded asphalt concrete layer;
s6: and spraying an anti-scattering asphalt layer on the dense-graded asphalt concrete layer.
Further, in the above construction process, the preparation method of the coarse asphalt concrete layer and the dense asphalt concrete layer is as follows: mixing asphalt and an asphalt durability agent to prepare an asphalt mixture, mixing the asphalt mixture and a coarse material to prepare coarse-graded asphalt concrete, and mixing the asphalt mixture and a dense material to prepare dense-graded asphalt concrete.
Further, in the above construction process, the components of the durability agent include: plasticizer copolymer, hydroxyl-terminated organic silicon, natural rubber powder, organic intercalation modified montmorillonite, calcined wollastonite powder, sodium lignosulfonate, carbon black powder, titanate coupling agent, organic silicon crosslinking agent and crosslinking catalyst.
Further, in the construction process, the durable agent comprises the following components in parts by weight: 70-100 parts of plasticizer copolymer, 55-75 parts of hydroxyl-terminated organic silicon, 20-40 parts of natural rubber powder, 15-30 parts of organic intercalation modified montmorillonite, 25-45 parts of calcined wollastonite powder, 3-7 parts of sodium lignosulfonate, 5-10 parts of carbon black powder, 3-5 parts of titanate coupling agent, 60-80 parts of organic silicon crosslinking agent and 3-6 parts of crosslinking catalyst.
Further, in the above construction process, the components of the anti-scattering asphalt layer include: modified emulsified asphalt, water-based epoxy resin emulsion and water.
Further, in the above construction process, the aqueous epoxy resin emulsion is prepared from an aqueous epoxy resin and an aqueous epoxy resin curing agent in a weight ratio of 1: 1 are mixed to obtain the product.
Further, in the construction process, the anti-flying asphalt comprises the following components in parts by weight: 30-40 parts of modified emulsified asphalt, 1 part of water-based epoxy asphalt emulsion and 1-2 parts of water.
Further, in the construction process, the aggregate of the coarse-graded asphalt concrete layer has the grain size of 30-40 mm.
Furthermore, in the construction process, the aggregate of the dense-graded asphalt concrete layer has the particle size of 8-10 mm.
Further, in the construction process, the aggregate of the coarse asphalt concrete layer and the dense asphalt concrete layer is one or two of basalt and diabase.
The invention has the following beneficial effects: the invention provides a construction process for enhancing the durability of square roads of a toll station, wherein a cement stable gravel layer is arranged on the top surface of a roadbed, belongs to a semi-rigid material and can be used as stress transition between a flexible asphalt material on the upper part and a rigid roadbed material on the lower part of the cement stable gravel layer to buffer the stress borne by a roadbed layer, so that cracks caused by overlarge pressure impact on the roadbed layer can be avoided, and cracks on the road surface can be avoided; the asphalt waterproof layer is sprayed on the cement-stabilized rubble layer, so that the cement-stabilized rubble layer and the roadbed can be prevented from being corroded by rainwater, the roadbed damage is avoided, and the durability of the roadbed is ensured; after the dense-graded asphalt concrete layer is paved, the anti-scattering asphalt layer is sprayed on the surface of the dense-graded asphalt concrete layer, so that the damage of a road roller or other heavy machinery to an asphalt film in the construction process can be repaired, the thickness of the asphalt film on the surface of the road surface is increased, the anti-scattering capability of the road surface is improved, and the durability of the road is improved.
Drawings
Fig. 1 is a schematic structural view of a square road of a toll station of the present invention.
The specific structure in the figure illustrates that: the asphalt concrete pavement comprises a roadbed 1, a first asphalt bonding layer 21, a second asphalt bonding layer 22, a third asphalt bonding layer 23, a cement stabilized gravel layer 3, an asphalt waterproof layer 4, a coarse asphalt concrete layer 5 and a dense asphalt concrete layer 6.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are given in the accompanying drawings.
A construction process for enhancing durability of a square road of a toll station comprises the following steps:
s1: paving a roadbed 1;
s2: cleaning the surface of the roadbed 1, spraying a first asphalt bonding layer 21, and paving a cement stabilized gravel layer 3 on the first asphalt bonding layer 21; the cement stabilized gravel layer 3 belongs to a semi-rigid material, can be used as stress transition between a flexible asphalt material on the upper part and a rigid roadbed material on the lower part, and has a buffering effect on stress borne by the roadbed layer, so that cracks caused by overlarge pressure impact on the roadbed layer can be avoided, and cracks on a road surface can be avoided;
s3: paving an asphalt waterproof layer 4 on the cement stabilized gravel layer 3; the asphalt waterproof layer 4 is sprayed, so that the cement stabilized gravel layer 3 and the roadbed 1 can be prevented from being eroded by rainwater, the roadbed damage is avoided, and the durability of the roadbed is ensured;
s4: after the asphalt waterproof layer 4 is dried, spraying a second asphalt bonding layer 22, and paving a coarse-graded asphalt concrete layer 5;
s5: spraying a third asphalt bonding layer 23 on the surface of the coarse-graded asphalt concrete layer 5, and then paving a dense-graded asphalt concrete layer 6;
s6: and spraying an anti-scattering asphalt layer on the dense-graded asphalt concrete layer 6. By spraying the anti-scattering asphalt layer, the damage of a road roller or other heavy machinery to an asphalt film in the construction process can be repaired, the thickness of the asphalt film on the surface of the road surface is increased, the anti-scattering capability of the road surface is improved, and therefore the durability of the road is improved.
Further, in the above construction process, the preparation method of the coarse asphalt concrete layer 5 and the dense asphalt concrete layer 6 is as follows: mixing asphalt and an asphalt durability agent to prepare an asphalt mixture, mixing the asphalt mixture and a coarse material to prepare coarse-graded asphalt concrete, and mixing the asphalt mixture and a dense material to prepare dense-graded asphalt concrete. The asphalt durability agent is added into the asphalt mixture, so that the durability of asphalt can be effectively improved, and the durability of a pavement structure is further improved.
Further, in the above construction process, the components of the durability agent include: plasticizer copolymer, hydroxyl-terminated organic silicon, natural rubber powder, organic intercalation modified montmorillonite, calcined wollastonite powder, sodium lignosulfonate, carbon black powder, titanate coupling agent, organic silicon crosslinking agent and crosslinking catalyst.
Further, in the construction process, the durable agent comprises the following components in parts by weight: 70-100 parts of plasticizer copolymer, 55-75 parts of hydroxyl-terminated organic silicon, 20-40 parts of natural rubber powder, 15-30 parts of organic intercalation modified montmorillonite, 25-45 parts of calcined wollastonite powder, 3-7 parts of sodium lignosulfonate, 5-10 parts of carbon black powder, 3-5 parts of titanate coupling agent, 60-80 parts of organic silicon crosslinking agent and 3-6 parts of crosslinking catalyst.
Preferably, the plasticizer copolymer is prepared by blending and polymerizing a pine oil plasticizer, a fatty plasticizer and a petroleum plasticizer at a mass ratio of 1: 0.6-0.9: 1-1.5 at 180-200 ℃. The pine oil plasticizer is one of disproportionated rosin and tall oil, the fat plasticizer is one of epoxy fatty acid methyl ester and soybean oil, and the petroleum plasticizer is one of linoleic acid and C5 resin.
Preferably, the organosilicon crosslinking agent is one of acetoxysilane, tetraethoxysilane, polyethyl methacrylate and polybutyl methacrylate, and the catalyst is stannous octoate or dibutyltin dimaleate.
Preferably, the side chain of the hydroxyl-terminated organosilicon contains one or more of vinyl ether group, allyl group, styryl group and fluoroalkyl group, and the preparation component further comprises 3-5 parts by weight of a photoinitiator diaryl iodonium salt.
Further, in the above construction process, the components of the anti-scattering asphalt layer include: modified emulsified asphalt, water-based epoxy resin emulsion and water.
The traditional modified emulsified asphalt material has low viscosity, is directly sprayed on the surface of a drainage asphalt pavement with open gradation, and the material can seep down to a lower bearing layer through a communicating gap and then is discharged from the pavement or accumulated on the lower bearing layer through a cross slope, so that the aims of repairing a damaged asphalt film and increasing the thickness of the asphalt film cannot be fulfilled. After the waterborne epoxy resin and the waterborne epoxy resin curing agent are mixed according to a certain proportion, an epoxy resin material with higher viscosity can be formed through curing, but the construction workability is influenced due to the overhigh viscosity of the epoxy resin material, the phenomenon of uneven brushing is easy to occur, and the water seepage performance and the skid resistance of the drainage asphalt pavement are greatly influenced. Aiming at the problem, the modified emulsified asphalt and the waterborne epoxy resin emulsion are mixed to form an asphalt material with moderate viscosity, so that good construction performance is ensured, and the damaged asphalt film can be repaired and the thickness of the asphalt film on the surface of the pavement can be increased through a series of curing action, interweaving action, permeating action and adhering action, so that the anti-scattering capability of the drainage asphalt pavement is improved on the premise of not influencing the water seepage performance and the anti-sliding performance of the drainage asphalt pavement.
Specifically, in the construction process, the aqueous epoxy resin emulsion is prepared by mixing aqueous epoxy resin and an aqueous epoxy resin curing agent in a weight ratio of 1: 1 are mixed to obtain the product. The waterborne epoxy resin curing agent is selected from one or more of aliphatic polyamine, alicyclic polyamine, polyamide and other normal-temperature curing agents, the solid content of the waterborne epoxy resin curing agent is 30-70%, and preferably, the solid content of the waterborne epoxy resin curing agent is 30-50% of one or more of diethylenetriamine, triethylene tetramine or tetraethylene pentamine.
Further, in the construction process, the anti-flying asphalt comprises the following components in parts by weight: 30-40 parts of modified emulsified asphalt, 1 part of water-based epoxy asphalt emulsion and 1-2 parts of water. The modified emulsified asphalt is preferably high-solid-content modified emulsified asphalt. Specifically, the quick-breaking type cation emulsified asphalt can be selected, and the solid content of the quick-breaking type cation emulsified asphalt is not less than 70%. Preferably, the modified emulsified asphalt is selected from one or more of SBR, SBS and EVA.
Further, in the construction process, the aggregate of the coarse-graded asphalt concrete layer 5 has a particle size of 30-40 mm.
Further, in the construction process, the aggregate of the dense-graded asphalt concrete layer 6 has a particle size of 8-10 mm.
Further, in the above construction process, the aggregate of the coarse asphalt concrete layer 5 and the dense asphalt concrete layer 6 is one or a mixture of basalt and diabase.
The above description is only a preferred embodiment of the present invention, but not intended to limit the scope of the invention, and all simple equivalent changes and modifications made in the claims and the description of the invention are within the scope of the invention.
Claims (10)
1. A construction process for enhancing durability of a square road of a toll station is characterized by comprising the following steps:
s1: paving a roadbed;
s2: cleaning the surface of the roadbed, spraying a first asphalt bonding layer, and paving a cement stabilized gravel layer on the first asphalt bonding layer;
s3: paving an asphalt waterproof layer on the cement stabilized gravel layer;
s4: after the asphalt waterproof layer is dried, spraying a second asphalt bonding layer, and paving a coarse-graded asphalt concrete layer;
s5: spraying a third asphalt bonding layer on the surface of the coarse-graded asphalt concrete layer, and paving the dense-graded asphalt concrete layer;
s6: and spraying an anti-scattering asphalt layer on the dense-graded asphalt concrete layer.
2. The construction process for enhancing the durability of the square road of the toll station according to claim 1, wherein the preparation method of the coarse asphalt concrete layer and the dense asphalt concrete layer is as follows: mixing asphalt and an asphalt durability agent to prepare an asphalt mixture, mixing the asphalt mixture and a coarse material to prepare coarse-graded asphalt concrete, and mixing the asphalt mixture and a dense material to prepare dense-graded asphalt concrete.
3. The process of claim 2, wherein the composition of the durability enhancing agent comprises: plasticizer copolymer, hydroxyl-terminated organic silicon, natural rubber powder, organic intercalation modified montmorillonite, calcined wollastonite powder, sodium lignosulfonate, carbon black powder, titanate coupling agent, organic silicon crosslinking agent and crosslinking catalyst.
4. The construction process for enhancing the durability of the square roads of the toll station as claimed in claim 3, wherein the components of the durability agent in parts by weight are as follows: 70-100 parts of plasticizer copolymer, 55-75 parts of hydroxyl-terminated organic silicon, 20-40 parts of natural rubber powder, 15-30 parts of organic intercalation modified montmorillonite, 25-45 parts of calcined wollastonite powder, 3-7 parts of sodium lignosulfonate, 5-10 parts of carbon black powder, 3-5 parts of titanate coupling agent, 60-80 parts of organic silicon crosslinking agent and 3-6 parts of crosslinking catalyst.
5. The process of claim 1, wherein the anti-fly-away asphalt layer comprises the following components: modified emulsified asphalt, water-based epoxy resin emulsion and water.
6. The construction process for enhancing the durability of the square roads of the toll station as claimed in claim 5, wherein the aqueous epoxy resin emulsion is prepared by mixing aqueous epoxy resin and aqueous epoxy resin curing agent in a weight ratio of 1: 1 are mixed to obtain the product.
7. The construction process for enhancing the durability of the square roads of the toll station as claimed in claim 6, wherein the anti-scattering asphalt comprises the following components in parts by weight: 30-40 parts of modified emulsified asphalt, 1 part of water-based epoxy asphalt emulsion and 1-2 parts of water.
8. The construction process for enhancing the durability of the square roads of the toll station according to claim 1, wherein the aggregate of the coarse asphalt concrete layer has a particle size of 30-40 mm.
9. The construction process for enhancing the durability of the square roads of the toll station according to claim 1, wherein the aggregate of the dense-graded asphalt concrete layer has a particle size of 8-10 mm.
10. The construction process for enhancing the durability of the square road of the toll station according to claim 1, wherein the aggregate of the coarse asphalt concrete layer and the dense asphalt concrete layer is any one or a mixture of basalt and diabase.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110374191.8A CN113073508A (en) | 2021-04-07 | 2021-04-07 | Construction process for enhancing durability of square road of toll station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110374191.8A CN113073508A (en) | 2021-04-07 | 2021-04-07 | Construction process for enhancing durability of square road of toll station |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015044792A2 (en) * | 2013-09-30 | 2015-04-02 | R.F.G. Trading Ltd. | Pavement systems with geocell and geogrid |
| CN108360327A (en) * | 2018-01-30 | 2018-08-03 | 沈阳工业大学 | A kind of permanent seal cooling advanced composite material (ACM) road structure and construction method |
| CN109082966A (en) * | 2018-07-18 | 2018-12-25 | 温州源龙建设有限公司 | Cracking resistance thermoregulation cement base pavement construction engineering method |
| CN109162162A (en) * | 2018-08-15 | 2019-01-08 | 徐润宝 | A kind of construction method promoting durability of asphalt pavement |
| CN111155393A (en) * | 2020-01-21 | 2020-05-15 | 中铁四局集团有限公司 | Double-layer drainage asphalt concrete pavement laying construction method |
-
2021
- 2021-04-07 CN CN202110374191.8A patent/CN113073508A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015044792A2 (en) * | 2013-09-30 | 2015-04-02 | R.F.G. Trading Ltd. | Pavement systems with geocell and geogrid |
| CN108360327A (en) * | 2018-01-30 | 2018-08-03 | 沈阳工业大学 | A kind of permanent seal cooling advanced composite material (ACM) road structure and construction method |
| CN109082966A (en) * | 2018-07-18 | 2018-12-25 | 温州源龙建设有限公司 | Cracking resistance thermoregulation cement base pavement construction engineering method |
| CN109162162A (en) * | 2018-08-15 | 2019-01-08 | 徐润宝 | A kind of construction method promoting durability of asphalt pavement |
| CN111155393A (en) * | 2020-01-21 | 2020-05-15 | 中铁四局集团有限公司 | Double-layer drainage asphalt concrete pavement laying construction method |
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Application publication date: 20210706 |
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