CN113668379A - Wearing layer structure of concrete pavement surface and construction method thereof - Google Patents
Wearing layer structure of concrete pavement surface and construction method thereof Download PDFInfo
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- CN113668379A CN113668379A CN202110938925.0A CN202110938925A CN113668379A CN 113668379 A CN113668379 A CN 113668379A CN 202110938925 A CN202110938925 A CN 202110938925A CN 113668379 A CN113668379 A CN 113668379A
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- 238000010276 construction Methods 0.000 title abstract description 26
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- 230000007480 spreading Effects 0.000 claims abstract description 24
- 238000003892 spreading Methods 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
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- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
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- 239000000203 mixture Substances 0.000 claims description 39
- 238000002156 mixing Methods 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 27
- 238000000227 grinding Methods 0.000 claims description 21
- 239000004814 polyurethane Substances 0.000 claims description 20
- 229920002635 polyurethane Polymers 0.000 claims description 20
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- 230000008569 process Effects 0.000 claims description 11
- 238000011282 treatment Methods 0.000 claims description 11
- 235000019738 Limestone Nutrition 0.000 claims description 7
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- 230000015572 biosynthetic process Effects 0.000 description 5
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- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical group [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 3
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- YBYGDBANBWOYIF-UHFFFAOYSA-N erbium(3+);trinitrate Chemical compound [Er+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O YBYGDBANBWOYIF-UHFFFAOYSA-N 0.000 description 1
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- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 1
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- LLZBVBSJCNUKLL-UHFFFAOYSA-N thulium(3+);trinitrate Chemical compound [Tm+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O LLZBVBSJCNUKLL-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a wearing layer structure of a concrete pavement surface and a construction method thereof, wherein the wearing layer structure comprises the following steps: s10: coating a bonding agent on the surface of the concrete pavement; s20: spreading broken stone on the surface of the adhesive to obtain a crushed stone layer; wherein the macadam has 50-75% by volume of the embedded binder. According to the technical scheme, the existing construction method is simplified, the wearing layer structure obtained by adopting the scheme has excellent anti-skid performance, and the travelling comfort is improved.
Description
Technical Field
The invention relates to the technical field of road and bridge pavement, in particular to a wearing layer structure of a concrete pavement surface and a construction method thereof.
Background
With the development of orthotropic steel bridge deck technology and the continuous expansion of application in modern bridges, the steel bridge deck pavement technology becomes an indispensable part in bridge design. The steel bridge deck pavement is an important factor influencing the durability and the driving comfort of the bridge.
At present, the mainstream steel bridge deck paving materials at home and abroad mainly comprise hot-mix asphalt concrete or modified dense-graded asphalt concrete, high-temperature mixing and pouring asphalt concrete, modified asphalt SMA and epoxy asphalt concrete, and the resin concrete technology with excellent performance gradually starts to be popularized and applied in China in recent years. The above paving technology generally adopts a composite structure, namely a lower protective layer and an upper wearing layer, wherein the wearing layer is mostly formed by SMA, if the lower protective layer and the upper wearing layer are cast, the lower protective layer and the upper wearing layer are formed by GA and SMA, and if ERS is formed by epoxy and SMA, the lower wearing layer and the upper wearing layer are formed by SMA. The SMA paving technology is simple in construction and good in performance, but the grading limitation has certain requirements on the paving thickness, so that the load of a paving structure is greatly increased, and a certain influence is caused on the surplus space with adjustable constant load of a bridge deck.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems.
Accordingly, a first object of the present invention is to provide a method for constructing a wearing course structure of a concrete pavement surface.
The second purpose of the invention is to provide a wearing layer structure of a concrete pavement surface.
In order to achieve the first object of the invention, the invention provides a wearing layer of a concrete pavement surface, which comprises the following components in parts by mass: 8-20 parts of a resin binder; 20-50 parts of crushed stone aggregate; wherein the crushed stone aggregate is embedded in the resin binder in an amount of 50-75% by volume.
According to the technical scheme, the pavement structure of the ultrathin wearing layer is realized, the defects in the existing steel bridge deck pavement technology are overcome, the wearing layer is paved on the surface of the constructed concrete, the service life of bridge deck pavement is prolonged, and the anti-skid performance and the driving comfort performance of the pavement surface are improved. The wearing and tearing layer structure comprises resin binder and rubble aggregate, and the resin binder is used for bonding the structure of mating formation of lower floor, and in this scheme, the structure of mating formation of lower floor is the concrete. The broken stone aggregate is spread above the binder to form a good skeleton structure, and the structural depth of the surface is provided, so that the antiskid performance is realized. The construction method provided by the scheme can be applied to various pavements, bridge decks and other places needing to be paved with wearing layers, such as roofs. After paving the broken stones, naturally preserving for at least 4 hours, and cleaning the scattered broken stones to open the traffic. In this scheme, its beneficial effect lies in: firstly, the resin binder provides strong binding power to bind the concrete layer and the broken stone aggregate; secondly, 50-75% of the volume of the gravel aggregate is embedded into the binder, so that the gravel aggregate is not easy to fall off, and a certain friction force is provided due to the structural depth of the gravel aggregate; finally, the gravel aggregates on the top layer of the pavement structure, has certain deformation capacity, increases flexibility for the upper layer of the pavement structure, and improves the driving comfort level.
In addition, the technical scheme provided by the invention also has the following additional technical characteristics:
in the technical scheme, the wearing layer also comprises 8-12 parts of resin binder and 2-50 parts of crushed stone aggregate; or 10-15 parts of resin binder and 20-30 parts of crushed stone aggregate; wherein the particle size of the gravel aggregate is 2-3 mm.
Further, the crushed aggregates include coarse aggregates and fine aggregates; in the scheme, the method comprises the following steps: the wearing layer comprises 10-20 parts of resin binder, 14-28 parts of coarse aggregate and 8-16 parts of fine aggregate; and/or the wearing layer comprises 12.3-12.7 parts of resin binder, 18-20 parts of coarse aggregate and 9-11 parts of fine aggregate.
In the technical scheme, the grain diameter of the coarse aggregate is 3-6 mm. The fine aggregate includes fine aggregate having a particle size of 0-0.5mm and fine aggregate having a particle size of 1-2 mm. In a preferred embodiment, the fine aggregate includes 4.8 to 9.6 parts by mass of fine aggregate having a particle size of 0 to 0.5mm and 3.2 to 6.4 parts by mass of fine aggregate having a particle size of 1 to 2 mm. In another preferred embodiment, the fine aggregate includes 5.4 to 6.6 parts by mass of fine aggregate having a particle size of 0.3 to 0.5mm and 3.6 to 4.4 parts by mass of fine aggregate having a particle size of 1 to 2 mm.
Further, the crushed stone aggregate is one or more of diabase, basalt, limestone and granite.
In the technical scheme, the wearing layer structure can eliminate road noise, improve road skid resistance, easily discharge road surface water and obviously improve driving comfort. The crushed stone is obtained by crushing rock of diabase, basalt, limestone and granite, and specifically comprises the following steps: firstly, a jaw crusher or a coarse crushing cone crusher is adopted to crush the rock primarily, so that the particle size of the rock is not more than 400 mm; secondly, carrying out secondary crushing by using a cone crusher; and finally, using a sand making machine to make the crushed stone with the required particle size from the rock after secondary crushing. After the three-stage crushing operation, optionally, a fine sand machine is adopted to perform cleaning operation according to different requirements.
Further, the resin binder is a polyurethane binder or an epoxy resin binder; wherein, the polyurethane adhesive comprises polyurethane, a curing agent and a catalyst.
In this technical scheme, the resin binder mainly used connects the rubble aggregate of lower floor concrete pavement structure and upper strata, need provide higher adhesive strength, prevents that the in-process rubble that uses from droing, and on the other hand, when the structure of mating formation on wearing and tearing layer was used at the steel bridge deck, the preferred binder that has waterproof performance just makes waterproofly from the structure of mating formation on top layer, places water and paves the infiltration to the steel bridge deck through the lower floor to protected the steel bridge deck not corroded. The resin binder may be selected from a polyurethane binder or an epoxy binder.
In order to achieve the second object of the present invention, the present invention provides a construction method of a wearing course structure, comprising the steps of:
s10: obtaining a structure to be paved;
s20: coating a resin binder on a structure to be paved, and spreading the broken stone aggregate before the resin binder is not cured; or the like, or, alternatively,
and mixing the resin binder and the broken stone aggregate to obtain a mixture, and spreading the mixture on the surface of the structure to be paved.
In the technical scheme, a special stirrer is used for stirring the crushed stone and the resin binder, the stirring time is not shorter than 5s, the discharged material is sampled and checked at any time during the stirring process, and the discharged material is uniform, stable and free of segregation. In the process of paving, a special resin concrete paver with leveling, distributing, vibrating and leveling functions is adopted for paving, and the machine moves forward at a constant speed and works continuously. If the resin binder is unevenly precipitated during the paving process, the treatment method comprises the following steps:
1. in the paving process, when the resin binder is insufficiently separated out from the surface of a part of paving area:
firstly, a troweling plate is used for separating out the resin binder in a mode of manually beating and extracting slurry;
secondly, a small amount of crushed stone aggregate and resin binder are mixed, and the mass percentage of the crushed stone aggregate is 35-45%. And filling up the area with insufficient resin binder by a brush after mixing.
2. When the resin binder on the surface of a part of paving area is excessively precipitated and completely submerges the surface layer broken stone aggregate, broken stones with larger grain diameters are scattered, a trowelling plate is used for lightly leveling, 50% -75% of broken stone particles are partially embedded into the resin binder, and the other part is kept in a exposed state.
Further, before S10, the construction method further includes: and (4) breaking stone aggregates. The macadam aggregate is prepared by the following steps:
A. crushing stone: water ═ 30-40: (80-90) mixing crushed stone and water, and adjusting the pH value to 10-12 to obtain a first mixture;
B. according to the proportion of erbium nitrate: thulium nitrate: calcium nitrate: water ═ (0.1-0.2): (4.8-4.9): 95 to obtain a second mixture;
C. according to the weight ratio of dipotassium hydrogen phosphate: water ═ 10-20: mixing materials according to the mass ratio of 100 to obtain a third mixture;
D. and (3) according to the second mixture: mixing the materials to prepare a mixed solution according to the volume ratio of (1-1.5), heating the mixed solution to 80-85 ℃, stirring for 2-4 hours, filtering and washing to obtain a jelly;
E. according to the first mixture: mixing the jelly according to the mass ratio of 100:10, stirring for 4 to 6 hours, aging for 12 to 18 hours, filtering, washing, drying and crushing to obtain the macadam aggregate.
In the steps, calcium nitrate and dipotassium phosphate in a specific ratio react to obtain a loose and porous hydroxyapatite structure. The multi-energy level erbium and thulium are excited by ultraviolet light, and the ultraviolet light can be converted into visible light through energy level transition, so that the ultraviolet resistance of the crushed stone aggregate is further promoted. Therefore, the pavement surface comprising the crushed stone aggregate can effectively isolate ultraviolet rays, and the service life of the pavement surface is prolonged. In addition, erbium and thulium in normal state are easy to influence the ultraviolet resistance effect due to agglomeration. Therefore, in the embodiment, the erbium and the thulium are loaded in the pores of the hydroxyapatite, and after the hydroxyapatite doped with the erbium and the thulium is mixed with the crushed stone, the agglomeration of the erbium and the thulium can be avoided, so that the ultraviolet resistance of the product is further ensured.
Further, the construction method also comprises the following steps:
s30: grinding the paved gravel layer by using a grinder;
wherein, in the process of the grinding operation, dust collection treatment is carried out simultaneously to clean the road surface; or in the process of the grinding operation, the road surface is cleaned by adopting combined treatment of blowing and sprinkling.
In the technical scheme, the grinding operation is mainly performed on special occasions such as airports, on one hand, a wearing layer needs to be laid to provide a certain friction force due to the requirement on the friction coefficient, on the other hand, due to the FOD index, the high requirement on the bonding strength of the wearing layer is achieved, if the crushed stones on the surface fall down, the crushed stones can become FOD, the normal operation of equipment such as landing gears and wings can be affected, and the crushed stones can be sucked into an engine seriously, so that the engine fails. Therefore, the scheme is that on the basis of laying the wearing layer, grinding operation is carried out, the flatness of the ground is improved, broken stones which are not firmly bonded can be treated, and potential safety hazards are eliminated; dust collection treatment is carried out while grinding, so that a dust-free grinding environment is provided.
Further, when the structure to be paved is a damaged pavement, the step S10 specifically includes:
s11: carrying out surface cleaning on the damaged pavement to remove loose gravels;
s12: carrying out flatness detection on the damaged pavement and marking;
s13: and finely leveling the damaged pavement.
In this technical solution, more specifically, the method includes:
firstly, the surface of the damaged pavement such as the original cement or polyurethane pavement structure is cleaned, and the damaged small diseases such as looseness, edge breakage and the like are eliminated.
And secondly, detecting the flatness, and marking the position with poor flatness.
And thirdly, carrying out fine leveling operation, and leveling by adopting a grinding machine if necessary.
And fourthly, continuously stirring the polyurethane adhesive which is synthesized by stirring the curing agent, the catalyst and the polyurethane by using a special stirrer.
Fifthly, the polyurethane adhesive is coated on the damaged pavement, the polyurethane adhesive is uniformly dispersed by gravity flow, and the specific dosage can be properly increased according to the actual engineering condition, such as the pavement needing the polyurethane adhesive for infiltration repair with more crack diseases.
Sixthly, uniformly spreading the basalt broken stone with the grain diameter of 2-3 mm before the polyurethane adhesive is cured.
And after the maintenance time is over, the excess gravels are cleaned, and the gravels can be directly cleaned by manpower or blown by an air pump, or cleaned by large-scale dust collection equipment.
Further, the wearing layer structure also comprises an SMA mixture; the construction method of the scheme comprises the following steps:
s41: obtaining a structure to be paved, and spreading the broken stone aggregate before the structure is solidified;
s42: coating the resin binder on the surface of the crushed stone aggregate;
s43: paving an SMA mixture on the surface of the resin binder;
wherein the amount of said resin binder is 0.5-2.0 kg/m, and/or,
the paving thickness of the SMA mixture is 2-8 cm.
According to the technical scheme, firstly, the crushed stone is embedded into the surface of the concrete layer, the embedded volume is 50-75%, then the SMA mixture is paved, so that the crushed stone and the SMA mixture form an embedded and extruded structure, the connection between the layered structures is tighter, and a composite layered structure is obtained. The SMA paving structure on the upper layer has good water stability, surface performance and durability; the required maintenance work is less, and the service life is long; the matching bonding of rubble and binder for the structure of mating formation of this scheme possesses certain waterproof performance.
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 only 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.
Figure 1 is a schematic view of the wearing course layer structure provided in example 1 of the present invention.
Figure 2 is a schematic view of the wear layer structure of example 10 of the present invention.
Description of the main element symbols:
1-a concrete layer; 2-a resin binder; 3-gravel aggregate; 4-SMA mixture.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In view of the fact that the existing pavement technology is greatly limited by the material selection of the wearing layer, the concrete with large development potential is researched, the wearing layer technology suitable for the concrete pavement surface is provided, the service life of the bridge deck pavement is prolonged, the anti-skid performance and the driving comfort of the pavement surface are provided, and the influence of the pavement layer on the bridge deck transverse load is reduced.
Example 1
The embodiment provides a wearing layer of a concrete pavement surface, which comprises 10 parts of resin binder and 20 parts of crushed stone aggregate by mass; wherein the resin binder is polyurethane binder, and the broken stone aggregate is diabase broken stone with a thickness of 2-3 mm.
The construction method of the wearing course comprises the following steps:
s10: obtaining a structure to be paved;
s20: and coating a resin binder on the structure to be paved, and spreading broken stone aggregates before the resin binder is not cured. And maintaining for more than 2 hours to open the traffic.
Referring to fig. 1, the wearing course of a concrete pavement surface provided by the embodiment includes a resin binder 2 and a crushed stone aggregate 3, which are laid on the concrete layer 1. In this embodiment, the provision of the gravel wearing layer increases the toughness of the upper layer of the concrete pavement structure, so that the concrete pavement structure has a certain deformation capability.
The wearing layer provided in this example was subjected to a performance test:
testing the drawing strength of the test piece by adopting a method provided in JTG/T3364-02-2019;
the friction coefficient of the test piece was tested by the method provided in JTG 3450 and 2019.
Wherein, the test pieces 1 to 4 are all prepared by the method provided by the embodiment; wherein the test piece 1 is not subjected to other treatments; manually grinding the surface crushed stone 1/3 construction depth of the test piece 2; manually grinding the structural depth of the surface crushed stone 2/3 of the test piece 3; and manually polishing the surface of the test piece 4 to complete the structural depth of the crushed stone. The results are shown in Table 1.
TABLE 1
Example 2
The embodiment provides a wearing layer of a concrete pavement surface, which comprises 12 parts of resin binder and 25 parts of crushed stone aggregate by mass; wherein the resin binder is polyurethane binder, and the crushed stone aggregate is basalt crushed stone with 2-3 mm.
The construction method of the wearing course comprises the following steps:
s10: obtaining a structure to be paved;
s20: and coating a resin binder on the structure to be paved, and spreading broken stone aggregates before the resin binder is not cured. And maintaining for more than 2 hours to open the traffic.
Example 3
The embodiment provides a wearing layer of a concrete pavement surface, which comprises 13 parts of resin binder and 30 parts of crushed stone aggregate by mass; wherein the resin binder is polyurethane binder, and the broken stone aggregate is limestone broken stone with a thickness of 2-3 mm.
The construction method of the wearing course comprises the following steps:
s10: obtaining a structure to be paved;
s20: and coating a resin binder on the structure to be paved, and spreading broken stone aggregates before the resin binder is not cured. And maintaining for more than 2 hours to open the traffic.
Example 4
The embodiment provides a wearing layer of a concrete pavement surface, which mainly aims at special sites such as airports and the like, and comprises 15 parts of resin binder and 30 parts of crushed aggregate by mass; wherein the resin binder is polyurethane binder, and the broken stone aggregate is limestone broken stone with a thickness of 2-3 mm.
The construction method of the wearing course comprises the following steps:
s10: obtaining a structure to be paved;
s20: and coating a resin binder on the structure to be paved, and spreading broken stone aggregates before the resin binder is not cured.
S30: grinding the paved gravel layer by using a grinder; meanwhile, in the process of grinding operation, dust collection treatment is carried out simultaneously to clean the road surface.
Example 5
The embodiment provides a wearing layer of a concrete pavement surface, which mainly aims at special sites such as airports and the like, and comprises 12 parts of resin binder and 25 parts of crushed stone aggregate by mass; wherein the resin binder is polyurethane binder, and the broken stone aggregate is limestone broken stone with a thickness of 2-3 mm.
The construction method of the wearing course comprises the following steps:
s10: obtaining a structure to be paved;
s20: and coating a resin binder on the structure to be paved, and spreading broken stone aggregates before the resin binder is not cured.
S30: grinding the paved gravel layer by using a grinder; meanwhile, in the process of grinding operation, the road surface is cleaned by combined treatment of blowing and sprinkling.
Example 6
The embodiment provides a wearing layer of a concrete pavement surface, which mainly aims at special sites such as airports and the like, and comprises 12 parts of resin binder and 28 parts of crushed aggregate by mass; wherein the resin binder is polyurethane binder, and the broken stone aggregate is limestone broken stone with a thickness of 2-3 mm.
The construction method of the wearing course comprises the following steps:
s10: obtaining a structure to be paved;
s20: and coating a resin binder on the structure to be paved, and spreading broken stone aggregates before the resin binder is not cured.
S30: grinding the paved gravel layer by using a grinder; meanwhile, in the process of grinding operation, the road surface is cleaned by combined treatment of blowing and sprinkling.
Example 7
The embodiment provides a wearing layer on a concrete pavement surface, which comprises the following components in parts by mass: 10 parts of a resin binder; 14 parts of coarse aggregate; and 8 parts of fine aggregate. Wherein the grain diameter of the coarse aggregate is 3-6 mm; the fine aggregate comprises two kinds of particle sizes of 0 to 0.5mm and 1 to 2mm, respectively, and in this example, 4 parts of 0 to 0.5mm fine aggregate and 4 parts of 1 to 2mm fine aggregate. The coarse aggregate and the fine aggregate are basalt broken stones.
In this embodiment, the wearing course structure is obtained by mixing and spreading the components, and the construction method comprises the following steps:
s10: obtaining a structure to be paved;
s20, mixing the resin binder and the broken stone aggregate to obtain a mixture, and spreading the mixture on the surface of the structure to be paved. And maintaining for at least 2 hours to open traffic.
The preparation of the mixture comprises the following steps:
(1) adding fine aggregates of 0-0.5mm and 1-2mm into a mixing pot according to the mass ratio, and pre-mixing for 30-60 s;
(2) adding coarse aggregate of 3-6mm into a mixing pot, and mixing in the mixing pot for 30-60 s;
(3) adding the resin binder into a mixing pot, and mixing for 80-100s in the mixing pot; and stirring uniformly to obtain a mixture. The properties are shown in Table 2.
TABLE 2 Properties of the blends
Example 8
The embodiment provides a wearing layer on a concrete pavement surface, which comprises the following components in parts by mass: 12.3 parts of a resin binder; 20 parts of coarse aggregate; 11 parts of fine aggregate. Wherein the grain diameter of the coarse aggregate is 3-6 mm; the fine aggregate comprises two kinds of particle sizes of 0 to 0.5mm and 1 to 2mm, respectively, and in this example, 6.6 parts of 0 to 0.5mm fine aggregate and 4.4 parts of 1 to 2mm fine aggregate. The coarse aggregate and the fine aggregate are basalt broken stones.
In this embodiment, the wearing course structure is obtained by mixing and spreading the components, and the construction method comprises the following steps:
s10: obtaining a structure to be paved;
s20, mixing the resin binder and the broken stone aggregate to obtain a mixture, and spreading the mixture on the surface of the structure to be paved. And maintaining for at least 2 hours to open traffic.
The preparation of the mixture comprises the following steps:
(1) adding fine aggregates of 0-0.5mm and 1-2mm into a mixing pot according to the mass ratio, and pre-mixing for 30-60 s;
(2) adding coarse aggregate of 3-6mm into a mixing pot, and mixing in the mixing pot for 30-60 s;
(3) adding the resin binder into a mixing pot, and mixing for 80-100s in the mixing pot; and stirring uniformly to obtain a mixture.
Example 9
The embodiment provides a wearing layer on a concrete pavement surface, which comprises the following components in parts by mass: 12.7 parts of a resin binder; 18 parts of coarse aggregate; 9 parts of fine aggregate. Wherein the grain diameter of the coarse aggregate is 3-6 mm; the fine aggregate comprises two kinds of particle sizes of 0 to 0.5mm and 1 to 2mm, respectively, and in this example, 5.4 parts of 0 to 0.5mm fine aggregate and 3.6 parts of 1 to 2mm fine aggregate. The coarse aggregate and the fine aggregate are basalt broken stones.
In this embodiment, the wearing course structure is obtained by mixing and spreading the components, and the construction method comprises the following steps:
s10: obtaining a structure to be paved;
s20, mixing the resin binder and the broken stone aggregate to obtain a mixture, and spreading the mixture on the surface of the structure to be paved. And maintaining for at least 2 hours to open traffic.
The preparation of the mixture comprises the following steps:
(1) adding fine aggregates of 0-0.5mm and 1-2mm into a mixing pot according to the mass ratio, and pre-mixing for 30-60 s;
(2) adding coarse aggregate of 3-6mm into a mixing pot, and mixing in the mixing pot for 30-60 s;
(3) adding the resin binder into a mixing pot, and mixing for 80-100s in the mixing pot; and stirring uniformly to obtain a mixture.
The wearing layer provided in this example was subjected to a performance test:
testing the drawing strength of the test piece by adopting a method provided in JTG/T3364-02-2019;
the friction coefficient of the test piece was tested by the method provided in JTG 3450 and 2019.
Wherein, the test pieces 1 to 4 are all prepared by the method provided by the embodiment; wherein the test piece 1 is not subjected to other treatments; manually grinding the surface crushed stone 1/3 construction depth of the test piece 2; manually grinding the structural depth of the surface crushed stone 2/3 of the test piece 3; and manually polishing the surface of the test piece 4 to complete the structural depth of the crushed stone. The results are shown in Table 3.
TABLE 3
Example 10
The embodiment provides a construction method of a wearing layer on a concrete pavement surface, which comprises the following steps:
s41: obtaining a structure to be paved, and spreading broken stone aggregate before the structure is solidified;
s42: coating a resin binder on the surface of the crushed stone aggregate;
s43: paving an SMA mixture on the surface of the resin binder;
wherein the dosage of the resin binder is 0.5 kg/square meter, and the paving thickness of the SMA mixture is 2 cm.
Referring to fig. 2, which is a wearing course on the concrete pavement surface provided in this embodiment, the crushed stone aggregate 3 is partially embedded in the concrete layer 1 to form an embedding and extruding structure; the resin binder 2 is combined with the broken stone aggregate 3 to combine the SMA mixture 4 and the concrete layer 1. The composite paving structure provided by the embodiment combines the broken stone and the SMA material, so that the connection between the hierarchical structures is tighter, and the thickness of the wearing layer is reduced.
Example 11
The embodiment provides a construction method of a wearing layer on a concrete pavement surface, which comprises the following steps:
s41: obtaining a structure to be paved, and spreading broken stone aggregate before the structure is solidified;
s42: coating a resin binder on the surface of the crushed stone aggregate;
s43: paving an SMA mixture on the surface of the resin binder;
wherein the dosage of the resin binder is 1 kg/square meter, and the paving thickness of the SMA mixture is 4 cm.
Example 12
The embodiment provides a construction method of a wearing layer on a concrete pavement surface, which comprises the following steps:
s41: obtaining a structure to be paved, and spreading broken stone aggregate before the structure is solidified;
s42: coating a resin binder on the surface of the crushed stone aggregate;
s43: paving an SMA mixture on the surface of the resin binder;
wherein the dosage of the resin binder is 2 kg/square meter, and the paving thickness of the SMA mixture is 8 cm.
Example 13
The embodiment provides a construction method of a wearing layer on a concrete pavement surface, which mainly aims at repairing a damaged pavement; the method comprises the following steps:
s11: carrying out surface cleaning on the damaged pavement to remove loose gravels;
s12: carrying out flatness detection on the damaged pavement and marking;
s13: finely leveling the damaged pavement to obtain a structure to be paved;
s20: coating the resin binder on a structure to be paved, and spreading broken stone aggregate before the resin binder is not cured; and removing redundant broken stone aggregates after curing for 2 hours.
Testing the technical scheme provided by the embodiment by laying a test section, and testing the friction coefficient after the test section is laid; then, manually polishing, simulating the abrasion of the vehicle to the paved surface, and measuring the friction coefficient of the pavement; and finally, laying a 5mm wearing layer, and testing the friction coefficient after natural curing. And (3) carrying out a bonding strength test on the paved structure with the wearing layer, and breaking the structure at the bonding part between the wearing layer and the lower layer, wherein the test data are shown in a table 4.
TABLE 4
| Test items | Pavement worn out | After laying wearing layer | Original pavement |
| BPN | 41 | 85 | 85 |
| Adhesive Strength (MPa) | - | 2.36 | - |
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The wearing layer on the concrete pavement surface is characterized by comprising the following components in parts by mass:
8-20 parts of a resin binder;
20-50 parts of crushed stone aggregate;
wherein the crushed stone aggregate is embedded in the resin binder in an amount of 50-75% by volume.
2. The wearing course layer according to claim 1, characterized by comprising, in parts by mass:
8-12 parts of resin binder and 2-50 parts of crushed stone aggregate; or the like, or, alternatively,
10-15 parts of resin binder and 20-30 parts of crushed stone aggregate;
wherein the particle size of the crushed stone aggregate is 2-3 mm.
3. The wearing course of claim 1, wherein said crushed stone aggregates comprise coarse aggregates and fine aggregates; and/or the presence of a gas in the gas,
the wearing layer comprises 10-20 parts of resin binder, 14-28 parts of coarse aggregate and 8-16 parts of fine aggregate; and/or the presence of a gas in the gas,
the wearing layer comprises 12.3-12.7 parts of resin binder, 18-20 parts of coarse aggregate and 9-11 parts of fine aggregate.
4. The wearing course layer structure of any one of claims 1-3,
the crushed stone aggregate is one or more of diabase, basalt, limestone and granite.
5. The wearing course layer structure of claim 1,
the resin binder is a polyurethane binder or an epoxy resin binder;
wherein, the polyurethane adhesive comprises polyurethane, a curing agent and a catalyst.
6. A method of constructing a wearing course structure as claimed in any one of claims 1 to 5, comprising the steps of:
s10: obtaining a structure to be paved;
s20: coating the structure to be paved with the resin binder, and spreading the broken stone aggregate before the resin binder is not cured; or the like, or, alternatively,
and mixing the resin binder and the broken stone aggregate to obtain a mixture, and spreading the mixture on the surface of the structure to be paved.
7. The method of constructing a wearing course structure in accordance with claim 6, further comprising the steps of:
s30: grinding the paved gravel layer by using a grinder;
wherein, in the process of the grinding operation, dust collection treatment is carried out simultaneously to clean the road surface; or the like, or, alternatively,
in the process of the grinding operation, the road surface is cleaned by adopting the combined treatment of blowing and sprinkling.
8. The method for constructing a wearing course structure as claimed in claim 6, wherein the structure to be paved is a damaged pavement; and the S10 further includes the steps of:
s11: carrying out surface cleaning on the damaged pavement to remove loose gravels;
s12: carrying out flatness detection on the damaged pavement and marking;
s13: and finely leveling the damaged pavement.
9. The wearing course layer structure of claim 1,
also comprises an SMA mixture.
10. A method of constructing a wearing course structure in accordance with claim 9, comprising the steps of:
s41: obtaining a structure to be paved, and spreading the broken stone aggregate before the structure is solidified;
s42: coating the resin binder on the surface of the crushed stone aggregate;
s43: paving an SMA mixture on the surface of the resin binder;
wherein the amount of said resin binder is 0.5-2.0 kg/m, and/or,
the paving thickness of the SMA mixture is 2-8 cm.
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| CN102296514B (en) * | 2011-05-27 | 2012-11-14 | 江苏省交通科学研究院股份有限公司 | Anti-skating wearing layer of epoxy asphalt pavement and preparation method thereof |
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| CN103498400A (en) * | 2013-10-27 | 2014-01-08 | 聂晓鸿 | Anti-skid wearing layer and preparing method thereof |
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