CN113462177A - Polymer composite modified asphalt and highway pavement structure thereof - Google Patents
Polymer composite modified asphalt and highway pavement structure thereof Download PDFInfo
- Publication number
- CN113462177A CN113462177A CN202110772683.2A CN202110772683A CN113462177A CN 113462177 A CN113462177 A CN 113462177A CN 202110772683 A CN202110772683 A CN 202110772683A CN 113462177 A CN113462177 A CN 113462177A
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- modified asphalt
- layer
- composite modified
- pavement
- asphalt
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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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
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
-
- 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
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
Abstract
The invention relates to the technical field of modified asphalt, in particular to high-molecular composite modified asphalt and a highway pavement structure thereof, and solves the problem that the high-molecular composite modified asphalt suitable for repairing damaged pavements needs to be improved in the prior art. The high molecular composite modified asphalt and its road surface structure includes composite modified asphalt modifier, which is sheared with matrix asphalt, organic amine, light oil and stabilizer to form high molecular composite modified asphalt. According to the invention, three different polymer composite modified asphalts are arranged in the pavement repairing area, so that the repaired pavement structure can be in better lap joint with the pavement repairing area, the occurrence of fracture of the repaired pavement and the old pavement structure is reduced, the stability, toughness and waterproof performance of the repaired pavement structure are improved, the pavement repairing mode is small in the involved old pavement structure area, the occupation of the used area of the old pavement is reduced, and the usability and practicability of the pavement repairing mode are improved.
Description
Technical Field
The invention relates to the technical field of modified asphalt, in particular to high-molecular composite modified asphalt and a highway pavement structure thereof.
Background
The modified asphalt is an asphalt binder prepared by adding external additives (modifiers) such as rubber, resin, high molecular polymer, ground rubber powder or other fillers or by adopting measures such as mild oxidation processing of the asphalt and the like, so that the performance of the asphalt or the asphalt mixture is improved. The modified asphalt has two mechanisms, namely, the chemical composition of the asphalt is changed, and the modifier is uniformly distributed in the asphalt to form a certain space network structure.
The existing road surfaces are different in the existing environment and the degree of wear consumption of the road surfaces in the same road section, the existing roads are suitable for the ground, are mostly classified into different categories such as extremely cold and hot areas, expressways, common roads and the like, and the same road surface structure is mostly adopted for paving the same road section even if the using conditions are different;
therefore, after the road surface is used for a long time, different positions of the road surface are damaged, and the damaged positions are mostly frequently used positions, so that the timely repair of the damaged road surface, the overlapping condition between the repaired road surface and the old road surface, whether the damage occurs at the later period after the repair, and the condition of the use feeling of the road surface after the repair need to be considered; therefore, the high-molecular composite modified asphalt and the highway pavement structure thereof are provided, and the high-quality repair of the highway pavement is realized by utilizing the high-molecular composite modified asphalt.
Disclosure of Invention
The invention aims to provide a high-molecular composite modified asphalt and a highway pavement structure thereof, and solves the problem that the high-molecular composite modified asphalt suitable for repairing damaged pavements needs to be improved in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-molecular composite modified asphalt comprises a composite modified asphalt agent, wherein the composite asphalt agent is sheared with matrix asphalt, organic amine, light oil and a stabilizer to form high-molecular composite modified asphalt;
the composite asphalt modifier comprises the following materials in parts by weight: 30-50 parts of a regenerated rubber composite material, 20-30 parts of a regenerated polyethylene material, 20-30 parts of perlite, 5-10 parts of asphalt aggregate and 10-20 parts of a cross-linking agent.
Preferably, the regenerated rubber composite material comprises regenerated rubber powder, waste fiber powder, sulfur and a softening agent, wherein the regenerated rubber powder is styrene-butadiene rubber powder or natural rubber powder, and the weight ratio of the regenerated rubber powder to the sulfur is 2: 1, the weight ratio of the regenerated rubber to the softener is 1: 1, the weight ratio of the regenerated rubber to the waste fiber powder is 2: 1.
preferably, the softener is a vegetable oil product containing phenolic hydroxyl and unsaturated alkyl chains, and is formed by heating and mixing under the action of an organic peroxide initiator.
Preferably, the crosslinking agent is thiamine disulfide.
Preferably, the asphalt aggregate is divided into large stone aggregate, medium stone aggregate and powdery aggregate to form three composite asphalt modifiers respectively, and the three composite modified asphalt modifiers further form three high-molecular composite modified asphalt correspondingly.
Preferably, the particle size of the large stone particle aggregate is 10-15mm, the particle size of the medium stone particle aggregate is 5-9mm, and the particle size of the powdery aggregate is 1-5 mm.
A highway pavement structure of polymer composite modified asphalt, which comprises an old pavement structure and a repaired pavement structure, the old pavement structure sequentially comprises a road base layer, an old cement board, a pavement inner layer and a cover coat from bottom to top, the old pavement structure also comprises a waterproof bonding layer arranged between the old cement board and the pavement inner layer, and the waterproof bonding layer is chiseled downwards from the top coat to the upper end surface of the roadbed layer, so as to form a pavement repairing area, the pavement repairing structure comprises a grouting layer arranged at the position of an old cement board, a large stone particle mixed layer and a medium stone particle mixed layer arranged at the inner layer of the pavement, a composite surface layer arranged at the top coat layer, and a grouting seam arranged between the grouting layer and the large stone particle mixed layer, and the grout spreading layer is arranged between the large stone particle mixing layer and the medium stone particle mixing layer, the grout spreading layer takes the grouting seam as the center, and the waterproof bonding layer extends to cover the upper end face of the grouting layer.
Preferably, the upper end face of the overlay is close to the pavement repair area and is provided with a plurality of notches, the composite overlay extends into the notches respectively, and the composite overlay is flush with the upper end face of the overlay.
Preferably, the large stone grain mixing layer, the medium stone grain mixing layer and the composite surface layer respectively correspond to three polymer composite modified asphalts corresponding to three composite asphalt modifiers formed by large stone grain aggregates, medium stone grain aggregates and powdery aggregates.
The invention has at least the following beneficial effects:
1. through the compound modified asphalt of polymer by three kinds of differences of supreme setting up down in the road surface repair region, make repair road surface structure can agree with the better overlap joint in road surface repair region, it subsides to have reduced to repair the regional later stage in road surface, take place with the cracked condition of old road surface structure, the stability of repairing road surface structure has been improved, toughness and waterproof performance, and this road surface repair mode, the old road surface structure area that involves is little, the occupation to old road surface usable floor area has been reduced, to the influence that old road surface structure used when improving road surface repair, the usability and the practicality of this road surface repair mode have been improved.
2. The waterproof performance of the later-stage three layers of different polymer modified asphalt is improved by adding the perlite, so that the water seepage in a pavement repairing area can be reduced, and the condition that a pavement repairing structure is broken from an old pavement structure is caused; the addition of the waste fiber powder improves the toughness of the composite modified asphalt agent, and the sulfur can improve the binding power between asphalt composite materials, so that the fracture resistance of a repaired pavement area with high use frequency is enhanced, the occurrence of secondary damage of the repaired pavement can be reduced, and the stability of the repaired pavement is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a vertical cross-section structure of a repaired pavement;
FIG. 2 is a schematic top view of a repaired pavement.
In the figure: 1. a roadbed layer; 2. old cement boards; 3. an inner layer of a pavement; 4. a top coat layer; 5. notching; 6. grouting layer; 7. grouting a seam; 8. a large stone grain mixing layer; 9. spreading a slurry layer; 10. a medium stone particle mixing layer; 11. a composite facing; 12. a waterproof adhesive layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1 and 2, a polymer composite modified asphalt includes a composite modified asphalt modifier, and the composite asphalt modifier is sheared with a matrix asphalt, an organic amine, a light oil component and a stabilizer to form a polymer composite modified asphalt; the composite asphalt modifier comprises the following materials in parts by weight: 30-50 parts of a regenerated rubber composite material, 20-30 parts of a regenerated polyethylene material, 20-30 parts of perlite, 5-10 parts of asphalt aggregate and 10-20 parts of a cross-linking agent; the cross-linking agent is thiamine disulfide; through utilizing reclaimed rubber composite and regeneration polyethylene material, realize a can hold the compound modified asphalt agent of environment-friendly of recovery material, the waterproof performance of later stage polymer modified asphalt can be improved to the perlite, and the asphalt aggregate can realize the compound modified asphalt of polymer of the stone grain of different particle diameters to can reduce the road surface and repair regional infiltration, lead to the road surface to repair the condition emergence of fracture between structure and the old road surface structure.
Further, the regenerated rubber composite material comprises regenerated rubber powder, waste fiber powder, sulfur and a softening agent, wherein the regenerated rubber powder is styrene-butadiene rubber powder or natural rubber powder, and the weight ratio of the regenerated rubber powder to the sulfur is 2: 1, the weight ratio of the regenerated rubber to the softener is 1: 1, the weight ratio of the regenerated rubber to the waste fiber powder is 2: 1; the softener is a vegetable oil product containing phenolic hydroxyl and unsaturated alkyl chain, and is formed by heating and mixing under the condition of an organic peroxide initiator; the addition of the waste fiber powder can improve the toughness of the composite modified asphalt agent, the sulfur can improve the cohesive force between asphalt composite materials, and the softening agent can further strengthen the toughness of the high-molecular composite modified asphalt, so that the fracture resistance of the repaired pavement area with high use frequency is enhanced, and the condition that the repaired pavement is damaged again can be reduced.
Further, the asphalt aggregate is divided into large stone aggregate, medium stone aggregate and powdery aggregate to respectively form three composite asphalt modifiers, and the three composite modified asphalt modifiers further correspondingly form three high-molecular composite modified asphalt; the particle size of the large stone particle aggregate is 10-15mm, the particle size of the medium stone particle aggregate is 5-9mm, and the particle size of the powdery aggregate is 1-5 mm; through the addition of the aggregate of different particle diameters for form three kinds of different polymer composite modified bituminous pavements, thereby realize different compressive capacity layers, and then make toughness and compressive capacity of three-layer polymer composite modified bituminous pavement complementary that can be better, with stable agreeing with between position repair road surface structure and the old road surface structure, improve the life after the road surface is repaired.
Example two
Referring to fig. 1 and 2, a high molecular composite modified asphalt road surface structure comprises an old road surface structure and a repaired road surface structure, wherein the old road surface structure sequentially comprises a road base layer 1, an old cement board 2, a road surface inner layer 3 and a cover surface layer 4 from bottom to top, the old road surface structure further comprises a waterproof bonding layer 12 arranged between the old cement board 2 and the road surface inner layer 3, and the cover surface layer 4 chisels downwards to the upper end surface of the road base layer 1 to form a road surface repairing area, the repaired road surface structure comprises a grouting layer 6 arranged at the old cement board 2, a large stone mixed layer 8 and a medium stone mixed layer 10 arranged at the road surface inner layer 3, a composite surface layer 11 arranged at the cover surface layer 4, a grouting seam 7 arranged between the grouting layer 6 and the large stone mixed layer 8, and a grout spreading layer 9 arranged between the large stone mixed layer 8 and the medium stone mixed layer 10, and the grout layer 9 takes the grouting seam 7 as a center, the waterproof bonding layer 12 extends to cover the upper end face of the grouting layer 6; the large stone particle mixing layer 8, the medium stone particle mixing layer 10 and the composite surface layer 11 are respectively corresponding to three polymer composite modified asphalts corresponding to three composite asphalt modifiers formed by large stone particle aggregates, medium stone particle aggregates and powdery aggregates; through the compound modified asphalt of polymer by three kinds of differences of supreme setting up down in the road surface repair region, make repair road surface structure can agree with the better overlap joint in road surface repair region, it subsides to have reduced to repair the regional later stage in road surface, take place with the cracked condition of old road surface structure, the stability of repairing road surface structure has been improved, toughness and waterproof performance, and this road surface repair mode, the old road surface structure area that involves is little, the occupation to old road surface usable floor area has been reduced, to the influence that old road surface structure used when improving road surface repair, the usability and the practicality of this road surface repair mode have been improved.
Furthermore, the upper end surface of the overlay 4 is close to the pavement patching area and is provided with a plurality of notches 5, the composite surface layer 11 respectively extends into the plurality of notches 5, and the composite surface layer 11 is flush with the upper end surface of the overlay 4; the arrangement of the slot 5 ensures that the repaired pavement structure is more compact in lap joint with the old pavement structure, and the repaired pavement structure is further smooth and stable, so that the use feeling after pavement repair is better.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The polymer composite modified asphalt is characterized by comprising a composite modified asphalt agent, wherein the composite modified asphalt agent is sheared with matrix asphalt, organic amine, light oil and a stabilizer to form polymer composite modified asphalt;
the composite asphalt modifier comprises the following materials in parts by weight: 30-50 parts of a regenerated rubber composite material, 20-30 parts of a regenerated polyethylene material, 20-30 parts of perlite, 5-10 parts of asphalt aggregate and 10-20 parts of a cross-linking agent.
2. The polymer composite modified asphalt of claim 1, wherein the reclaimed rubber composite comprises reclaimed rubber powder, waste fiber powder, sulfur and a softener, wherein the reclaimed rubber powder is styrene-butadiene rubber powder or natural rubber powder, and the weight ratio of the reclaimed rubber powder to the sulfur is 2: 1, the weight ratio of the regenerated rubber to the softener is 1: 1, the weight ratio of the regenerated rubber to the waste fiber powder is 2: 1.
3. the polymer composite modified asphalt of claim 1, wherein the softener is a vegetable oil containing phenolic hydroxyl groups and unsaturated alkyl chains, and is formed by heating and mixing under the action of an organic peroxide initiator.
4. The polymer composite modified asphalt of claim 1, wherein the cross-linking agent is thiamine disulfide.
5. The polymer composite modified asphalt of claim 1, wherein the asphalt aggregate is divided into three kinds of large stone aggregate, medium stone aggregate and powdery aggregate to form three kinds of composite asphalt modifiers respectively, and the three kinds of composite modified asphalt modifiers form three kinds of polymer composite modified asphalt correspondingly.
6. The polymer composite modified asphalt of claim 5, wherein the large stone aggregate has a particle size of 10-15mm, the medium stone aggregate has a particle size of 5-9mm, and the powdery aggregate has a particle size of 1-5 mm.
7. A highway pavement structure of polymer composite modified asphalt is characterized by comprising an old pavement structure and a repaired pavement structure, wherein the old pavement structure sequentially comprises a road base layer (1), an old cement board (2), a pavement inner layer (3) and a cover coat (4) from bottom to top, the old pavement structure further comprises a waterproof bonding layer (12) arranged between the old cement board (2) and the pavement inner layer (3), and the cover coat (4) drills downwards to the upper end surface of the road base layer (1) to form a pavement repairing area, the repaired pavement structure comprises a grouting layer (6) arranged at the old cement board (2), a large stone mixed layer (8) and a medium stone mixed layer (10) arranged at the pavement inner layer (3), a composite surface layer (11) arranged at the cover coat (4), and a grouting joint (7) arranged between the grouting layer (6) and the large stone mixed layer (8), and the grout spreading layer (9) is arranged between the large stone particle mixing layer (8) and the medium stone particle mixing layer (10), the grout spreading layer (9) takes the grouting seam (7) as the center, and the waterproof bonding layer (12) extends to cover the upper end face of the grouting layer (6).
8. The highway pavement structure of the polymer composite modified asphalt of claim 7, wherein the upper end surface of the overlay (4) is close to the pavement repair area and is provided with a plurality of notches (5), the composite overlay (11) extends into the plurality of notches (5), and the composite overlay (11) is flush with the upper end surface of the overlay (4).
9. The highway pavement structure of the polymer composite modified asphalt of claim 7, wherein the large stone particle mixed layer (8), the medium stone particle mixed layer (10) and the composite surface layer (11) respectively correspond to three polymer composite modified asphalts corresponding to three composite asphalt modifiers formed by large stone particle aggregates, medium stone particle aggregates and powdery aggregates.
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| CN202110772683.2A CN113462177A (en) | 2021-07-08 | 2021-07-08 | Polymer composite modified asphalt and highway pavement structure thereof |
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