CN110804921A - Tunnel concrete pavement additional paving material and construction method thereof - Google Patents
Tunnel concrete pavement additional paving material and construction method thereof Download PDFInfo
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- CN110804921A CN110804921A CN201910967551.8A CN201910967551A CN110804921A CN 110804921 A CN110804921 A CN 110804921A CN 201910967551 A CN201910967551 A CN 201910967551A CN 110804921 A CN110804921 A CN 110804921A
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- asphalt
- aggregate
- pavement
- concrete pavement
- paving material
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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
- E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
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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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- 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
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
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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
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/24—Binder incorporated as an emulsion or solution
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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
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/262—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a tunnel concrete pavement paving material and a construction method thereof, wherein the paving material comprises rubber asphalt, fibers, aggregates and emulsified asphalt; wherein the mass ratio of the rubber asphalt to the fibers to the fine aggregate to the emulsified asphalt is (2.0-2.6): 0.18: (14-18): (0.6-0.8). The tunnel concrete pavement paving material provided by the invention can improve the defects of roads. The embodiment result shows that the tunnel concrete pavement paving material provided by the invention only needs to be paved with a thickness of less than 15mm on the tunnel pavement to realize the isolation of the reflective cracks on the pavement.
Description
Technical Field
The invention relates to the technical field of road maintenance, in particular to a tunnel concrete pavement paving material and a construction method thereof.
Background
As is well known, in the prior years, the expressway in China is not a white concrete pavement which has the defects of poor comfort and difficult repair of reflective cracks; according to the requirement of the design and service life of roads in China, a considerable part of roads in China need to be repaired inside and on roadbeds, and the service life of the roads is prolonged by adopting a 'white plus black' road surface reconstruction mode. The traditional 'white plus black' road surface reconstruction adopts the steps of firstly paving a cement stabilizing layer before paving an asphalt road surface, and then paving thicker asphalt concrete.
However, the height of the tunnel which is built up is designed according to the original road surface form, and the subsequent black road surface covering is not considered, so that the height of the tunnel cannot reach the standard in the traditional 'white plus black' paving mode. Therefore, there is a need for a pavement overlay that effectively isolates reflective cracks without affecting the elevation of the tunnel.
Disclosure of Invention
The invention provides a tunnel concrete pavement paving material and a construction method thereof. The tunnel concrete pavement paving material provided by the invention can be used for isolating the reflective cracks on the pavement only by paving the pavement with the thickness of less than 15 mm.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a tunnel concrete pavement paving material, which comprises rubber asphalt, fibers, aggregate and emulsified asphalt;
the mass ratio of the rubber asphalt to the fibers to the fine aggregate to the emulsified asphalt is (2.0-2.6): 0.18: (14-18): (0.6-0.8).
Preferably, the Saebrt viscosity of the emulsified asphalt is 20-100 s; the evaporation residue of the emulsified asphalt is more than or equal to 60 wt.%.
Preferably, the preparation method of the emulsified asphalt comprises the following steps: mixing and emulsifying the matrix asphalt, the emulsifier and water at 140 ℃ to obtain the emulsified asphalt.
Preferably, the passing rate of the aggregate through a sieve pore of 0.075mm is less than or equal to 0.4%.
Preferably, the aggregate is asphalt-coated aggregate;
the preparation method of the asphalt-coated aggregate comprises the following steps: mixing asphalt and basic aggregate at the temperature of over 120 ℃ to realize the coating of the asphalt on the basic aggregate to obtain asphalt-coated aggregate; the mass of the asphalt is 0.3-0.5% of the mass of the basic aggregate.
Preferably, the length of the fiber is 30-120 mm, and the tex of the fiber is 2000-2600 g/Km;
the viscosity of the rubber asphalt at 177 ℃ is 1.5-4.0 Pa.S.
The invention also provides a construction method for adding the paving material on the concrete pavement of the tunnel in the technical scheme, which comprises the following steps:
(1) repairing the gap of the concrete pavement of the tunnel to be treated to form a pavement to be paved;
(2) after rubber asphalt, fibers and aggregates are sequentially paved on the surface of the pavement to be paved in the step (1), rolling is carried out to form a fiber reinforced asphalt surface wearing layer;
(3) and (3) spreading emulsified asphalt on the fiber reinforced asphalt surface wearing layer in the step (2), and then drying.
Preferably, in the step (2), the spreading amount of each component is 2.0-2.6 kg/m based on the surface area of the pavement to be paved2；
The spreading amount of the fiber is 180g/m2；
The spreading amount of the aggregate is 14-18 kg/m2。
Preferably, the time from spreading of the rubber asphalt to completion of rolling in the step (2) is 10-20 min.
Preferably, in the step (3), the spreading amount of the emulsified asphalt is 0.6-0.8 kg/m based on the surface area of the pavement to be paved2。
The invention provides a tunnel concrete pavement paving material, which comprises rubber asphalt, fibers, aggregate and emulsified asphalt; wherein the mass ratio of the rubber asphalt to the fibers to the fine aggregate to the emulsified asphalt is (2.0-2.6): 0.18: (14-18): (0.6-0.8). The tunnel concrete pavement paving material provided by the invention can improve the defects of roads. The embodiment result shows that the tunnel concrete pavement paving material provided by the invention only needs to be paved with a thickness of less than 15mm on the tunnel pavement, so that the isolation of the reflective cracks on the pavement can be realized, and the elevation of the tunnel cannot be influenced.
Detailed Description
The invention provides a tunnel concrete pavement paving material, which comprises rubber asphalt, fibers, aggregate and emulsified asphalt;
the mass ratio of the rubber asphalt to the fibers to the fine aggregate to the emulsified asphalt is (2.0-2.6): 0.18: (14-18): (0.6-0.8).
In the present invention, each raw material component is a commercially available product well known to those skilled in the art, unless otherwise specified.
The tunnel concrete pavement paving material provided by the invention comprises rubber asphalt, fibers, aggregate and emulsified asphalt. In the invention, the mass ratio of the rubber asphalt, the fiber, the aggregate and the emulsified asphalt is (2.0-2.6): 0.18: (14-18): (0.6-0.8), preferably (2.1-2.5): 0.18: (15-17): (0.65-0.75), more preferably (2.2-2.3): 0.18: 16: 0.7.
in the present invention, the technical requirements of the rubber asphalt are preferably: a viscosity at 177 ℃ of 1.5 to 4.0 pas, more preferably 2.0 to 3.0 pas; the penetration degree is preferably 25 degrees, and the penetration degree refers to the depth of a test standard needle vertically penetrating into an emulsified asphalt sample under a 100g load at 25 ℃ for 5s, and the penetration degree is 1/10 mm; the softening degree is more than or equal to 54 ℃; the elastic recovery is more than or equal to 80 under the condition of 25 ℃.
In the invention, the Sibert viscosity of the emulsified asphalt is preferably 20-100 s, and more preferably 40-60 s; the evaporation residue of the emulsified asphalt is preferably more than or equal to 60 wt.%, and more preferably 65-80 wt.%; the density of the emulsified asphalt is preferably 0.91-1 g/cm3。
In the invention, the penetration degree of the emulsified asphalt is preferably 30-90 degrees, and more preferably 40-60 degrees; the penetration is the depth of a test standard needle penetrating vertically into an emulsified asphalt sample at 25 ℃ for 5s under a load of 0g in units of 1/10 mm.
In the present invention, the emulsified asphalt is an aqueous asphalt; the preparation method of the emulsified asphalt preferably comprises the following steps: mixing the matrix asphalt, the emulsifier and water at 140 ℃ to obtain the emulsified asphalt. The source of the base asphalt of the present invention is not particularly limited, and it is sufficient to use asphalt for paving road surfaces, which is well known to those skilled in the art.
In the invention, the tunnel concrete pavement paving material further comprises fibers. In the invention, the length of the fiber is preferably 30-120 mm, more preferably 40-100 mm, and even more preferably 50-80 mm; the tex of the fibers is preferably 2000 to 2600g/Km, and more preferably 2200 to 2500 g/Km. In the present invention, the fibers are preferably glass fibers or basalt fibers, and more preferably glass fibers of the twistless roving type. The fiber of the invention has good cutting property, higher breaking strength, better oil absorption rate, small environmental pollution, and no boron or fluorine.
In the present invention, the tunnel concrete pavement overlay material comprises aggregate. In the invention, the passing rate of the aggregate through a square-hole sieve with the diameter of 0.075mm is preferably less than or equal to 0.4 percent; in the invention, the grading of the aggregate is further preferably that the passing rate of the aggregate through a square-hole sieve with the diameter of 16mm is 100%, the passing rate of the aggregate through a square-hole sieve with the diameter of 13.2mm is 75-100%, the passing rate of the aggregate through a square-hole sieve with the diameter of 9.5mm is 0-15%, the passing rate of the aggregate through a square-hole sieve with the diameter of 2.36mm is 0-5%, and the passing rate of the aggregate through a square-hole sieve with the diameter of 0.075mm is 0-0.4%.
In the present invention, the aggregate is preferably basalt broken stone. In the present invention, the aggregate is preferably prepared by: the crushing value of stones is less than or equal to 26 percent, the abrasion loss of los angeles is less than or equal to 28 percent, the apparent relative density is less than or equal to 2.6, the water absorption rate is less than or equal to 2.0 percent, the firmness is less than or equal to 12 percent, the soft stone content is less than or equal to 3 percent, and the needle-shaped particle content is less than or equal to 15 percent by weight.
In the present invention, the aggregate is preferably a bitumen coated aggregate, the aggregate being determined to meet the requirement of a throughput of preferably 0.4% or less through a square mesh screen having a diameter of 0.075 mm. In the present invention, the preparation method of the asphalt-coated aggregate preferably comprises: and mixing the asphalt and the basic aggregate at the temperature of over 120 ℃ to realize the coating of the asphalt on the basic aggregate to obtain the asphalt-coated aggregate. In the invention, the basic aggregate is the aggregate with smaller particle size which is not enough to meet the grading requirement of the technical scheme in the prior art. In the present invention, the mass of the asphalt is preferably 0.3 to 0.5%, and more preferably 0.35 to 0.45% of the mass of the base aggregate. In the present invention, the mixing temperature is preferably 120 ℃ or higher, and more preferably 120 to 200 ℃. When asphalt is adopted to coat the aggregate, the asphalt-coated aggregate is preferably used for paving the pavement within 2 hours after the coating is finished.
The preparation method of the tunnel concrete pavement paving material is not particularly limited, and the preparation method of the pavement paving material known by the technical personnel in the field can be adopted. The invention preferably independently subpackages each component in the tunnel concrete pavement paving material, and correspondingly applies the components when the pavement paving material is applied.
The invention also provides a construction method for adding the paving material on the concrete pavement of the tunnel in the technical scheme, which comprises the following steps:
(1) repairing the gap of the concrete pavement of the tunnel to be treated to form a pavement to be paved;
(2) after rubber asphalt, fibers and aggregates are sequentially paved on the surface of the pavement to be paved in the step (1), rolling is carried out to form a fiber reinforced asphalt surface wearing layer;
(3) and (3) spreading emulsified asphalt on the fiber reinforced asphalt surface wearing layer in the step (2), and then drying.
The method repairs the gap of the concrete pavement of the tunnel to be processed to form the pavement to be paved. The invention has no special requirements on the type of the tunnel concrete pavement to be treated, and any method which needs to be paved to solve the problems of cracks and the like is well known to the technical personnel in the field, but the tunnel concrete pavement with the influenced elevation is worried about.
In the invention, the repairing mode is preferably common crack pouring or slotted crack pouring. In the present invention, the general crack pouring preferably includes pavement cleaning and pavement crack pouring. The invention is not particularly limited to the specific embodiment of the pavement cleaning application described, and may be practiced using techniques well known to those skilled in the art to remove debris and dust from the pavement. After the pavement is cleaned, the method carries out pavement crack pouring treatment to repair the gaps of the concrete pavement of the tunnel. In the invention, the environment temperature of the crack pouring treatment is preferably more than or equal to 10 ℃; when the environmental temperature is less than 10 ℃, the invention preferably heats the road surface around the gap, and provides proper environmental temperature for crack pouring treatment. In the invention, the material for crack pouring treatment is preferably modified rubber asphalt. In the invention, the usage amount of the material for crack pouring treatment is that the height difference between the material in the crack and the road surface around the crack is less than or equal to 3 mm. When the material in the gap forms local depressions along the gap, the invention preferably performs secondary crack pouring treatment.
In the present invention, the slotting and caulking preferably comprises the following steps: (a) expanding the seam; (b) cleaning the seams; (c) mounting of a backing strip; (d) and (6) pouring a seam. In the invention, the seam expanding mode is preferably to expand the seam by a grooving machine under the dry condition; the groove shape of the grooving machine is preferably rectangular, the width of a notch of the grooving machine is preferably slightly larger than the width of an original gap, and the depth of the groove is preferably 2-3 cm; if the gap is filled, the old crack pouring material is completely removed in the crack expanding process. The present invention does not require special implementation of the expansion joint, and may be implemented as is known to those skilled in the art.
After the seam is expanded, the invention preferably carries out seam cleaning treatment. The invention further preferably adopts a sand blasting machine, an air compressor or a steel wire brush to clean the gap. The invention has no special requirements on the specific implementation mode of the crack cleaning treatment, and the method is well known by the technical personnel in the field; after the seam is cleaned, the wall of the seam can be wiped by fingers or white towels, and if obvious dust exists, the seam is cleaned again.
After the seam cleaning process, the present invention preferably performs the installation of the backing strip. In the invention, the use of the back lining strip can avoid the defect of poor crack pouring effect caused by too wide cracks. In the present invention, the backing strip is preferably a foam strip. In the present invention, the specification of the backing strip preferably meets the requirements shown in table 1.
TABLE 1 technical requirements for backing strips
Note: the foam plastic strip I is a cold and hot dual-purpose round rod shape, the foam plastic strip II is a cold and hot dual-purpose strip shape, and the foam plastic strip III is a cold round rod shape.
In the present invention, the backing strip may be attached such that the width-to-depth ratio of the gap satisfies (1-2): 1.
After the backing strip is installed, the present invention preferably performs crack pouring. The present invention has no special requirements for the concrete implementation of the crack pouring, and the method is well known by the technical personnel in the field. In the invention, the crack pouring process preferably adopts a nozzle, the nozzle penetrates into the bottom of the crack groove at an oblique angle of 45 degrees, and the crack is filled from bottom to top; in the crack pouring process, the crack pouring speed is not too high, and the bubble is fully released; the seam filling process of one seam is preferably continuously carried out; the crack pouring material after crack pouring is uniform and full without foaming and rising phenomena, and the crack pouring material after crack pouring is flush with the peripheral pavement.
After the gap is repaired, the repaired road surface is preferably cleaned to obtain a clean road surface to be paved; the cleaning preferably comprises clean water washing and wind power floating dust removal which are carried out in sequence. The present invention has no special requirement for the implementation mode of the clean water washing and the wind power dust removal, and the method is well known to those skilled in the art. The invention adopts the cleaning mode to realize the removal of the debris on the surface of the road surface to be treated; the debris specifically refers to soil, gravel, silt, weeds or oil stains.
After the pavement to be paved is obtained, the invention sequentially paves the rubber asphalt, the fiber and the aggregate on the surface of the pavement to be paved, and then rolls the pavement to form the fiber reinforced asphalt surface wearing layer. The invention sequentially spreads rubber asphalt, fiber and aggregate on the surface of the pavement to be added; the spreading amount of each component is calculated by taking the surface area of a pavement to be paved as a reference, and the spreading amount of the rubber asphalt is preferably 2.0-2.6 kg/m2More preferably 2.1 to 2.5kg/m2More preferably 2.2 to 2.4kg/m2(ii) a The spreading amount of the fibers is preferably 180g/m2(ii) a The spreading amount of the aggregate is preferably 14-18 kg/m2More preferably 15 to 17kg/m2. In the process of spreading the components, the air temperature and the road surface temperature are preferably not lower than 15 ℃, so that the rubber asphalt can be firmly bonded with the bearing layer below the road surface, the rubber asphalt and the aggregateAnd (7) fixing.
The invention has no special requirements on the spreading mode of each component, and the mode of spreading materials on the pavement, which is well known by the technical personnel in the field, can be adopted. In the embodiment of the invention, rubber asphalt synchronous macadam construction equipment is particularly adopted for spreading materials.
After the components are paved, the pavement paved with the aggregates is preferably rolled to form a fiber reinforced asphalt surface wearing layer. The invention preferably adopts a rubber-tyred road roller with the weight of more than 25 tons to roll the road surface; the number of passes is preferably 3. The time from spreading of the rubber asphalt to completion of rolling is preferably 10-20 min, more preferably 12-18 min, and even more preferably 15 min.
After rolling is finished, the invention preferably cleans loose particles on the surface of the rolled pavement to obtain a clean fiber reinforced asphalt surface wearing layer, which is convenient for uniform spreading of subsequent emulsified asphalt, and further ensures that the emulsified asphalt and the firstly spread rubber asphalt, fiber and aggregate are well bonded. The invention has no special requirements on the cleaning mode of loose particles, and the method is well known by the technical personnel in the field.
After the fiber reinforced asphalt surface wearing layer is formed, the emulsified asphalt is spread on the fiber reinforced asphalt surface wearing layer and then dried. In the invention, the spreading amount of the emulsified asphalt is preferably 0.6-0.8 kg/m based on the surface area of the pavement to be paved2More preferably 0.65 to 0.75kg/m2More preferably 0.7kg/m2. The invention has no special requirement on the spreading mode of the emulsified asphalt and can adopt the method which is well known by the technical personnel in the field; in the embodiment of the invention, the spreading of the emulsified asphalt is specifically completed by adopting an asphalt spreading vehicle.
After the emulsified asphalt is spread, the method carries out drying treatment on the pavement spread with the emulsified asphalt. The invention has no special requirements on the specific implementation mode of the drying treatment, and the pavement drying mode which is well known by the technical personnel in the field can be adopted; in the embodiment of the invention, a normal-temperature airing mode is specifically adopted. In the present invention, the road surface is dried and then put into normal use.
In order to further illustrate the present invention, the following detailed description will be made of the anti-fog seal and the construction method thereof, which are provided by the present invention, but they should not be construed as limiting the scope of the present invention.
Example 1
Preparing materials:
the emulsified asphalt is obtained by mixing matrix asphalt, an emulsifier and water at 140 ℃; the emulsified asphalt has a Sabert viscosity of 100s, an evaporation residue of not less than 60 wt.%, and a density of 0.91g/cm3The penetration was 30 degrees at 25 ℃ and 5s under a load of 0 g.
Coating the basalt macadam by adopting asphalt with the mass of 0.5 percent of that of the basic aggregate at the temperature of 150 ℃ to obtain asphalt-coated aggregate, wherein the performances of the asphalt-coated aggregate meet the requirements that the stone crushing value is less than or equal to 26 percent, the loss of abrasion of the los angeles is less than or equal to 28 percent, the apparent relative density is less than or equal to 2.6, the water absorption rate is less than or equal to 2.0 percent, the firmness is less than or equal to 12 percent, the soft stone content is less than or equal to 3 percent, and the; and the passing rate of the filter screen passing through a square hole sieve with the diameter of 0.075mm is preferably less than or equal to 0.4 percent.
The glass fiber is selected from the untwisted roving type glass fiber with the length of 120mm and the tex of 2600g/Km preferably.
Selecting the viscosity of 4.0 Pa.s at 177 ℃; rubber asphalt with penetration degree of 25 ℃ and softening degree of more than or equal to 54 ℃ under the load of 100g within the time of 5s at 25 ℃.
After the gaps of the tunnel concrete pavement are repaired, rubber asphalt, fibers and aggregates are respectively paved on the pavement under the conditions of air temperature and pavement temperature of 20 ℃, and are rolled for 3 times by a 25-ton rubber-wheel road roller, so that the time from the beginning of paving the rubber asphalt to the completion of rolling is ensured to be within 20 min. Wherein the spreading amount of the rubber asphalt is 2.6kg/m2The spreading amount of the fiber is 180g/m2The spreading amount of the aggregate is 17kg/m2。
Then cleaning loose particles on the surface of the rolled pavement, spreading emulsified asphalt on the pavement, drying at normal temperature and putting into use. Wherein the emulsified asphaltThe spreading amount of (A) is 0.8kg/m2。
After the pavement is finished, the thickness of the pavement is 14mm, and the isolation of the reflective cracks on the pavement is realized.
From the above embodiments, it can be seen that the tunnel concrete pavement paving material provided by the present invention only needs to be paved on a tunnel pavement in a thickness of 15mm or less, so as to realize isolation of reflective cracks on the pavement.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A tunnel concrete pavement paving material comprises rubber asphalt, fiber, aggregate and emulsified asphalt;
the mass ratio of the rubber asphalt to the fibers to the fine aggregate to the emulsified asphalt is (2.0-2.6): 0.18: (14-18): (0.6-0.8).
2. The tunnel concrete pavement paving material of claim 1, wherein the emulsified asphalt has a Sabert viscosity of 20-100 s; the evaporation residue of the emulsified asphalt is more than or equal to 60 wt.%.
3. The tunnel concrete pavement overlay of claim 1 or 2, wherein the emulsified asphalt is prepared by a method comprising: mixing and emulsifying the matrix asphalt, the emulsifier and water at 140 ℃ to obtain the emulsified asphalt.
4. The tunnel concrete pavement paving material of claim 1, wherein the aggregate has a pass rate of 0.4% or less through a square mesh screen with a diameter of 0.075 mm.
5. The tunnel concrete pavement overlaying material of claim 1 or 4, wherein said aggregate is asphalt-coated aggregate;
the preparation method of the asphalt-coated aggregate comprises the following steps: mixing asphalt and basic aggregate at the temperature of over 120 ℃ to realize the coating of the asphalt on the basic aggregate to obtain asphalt-coated aggregate; the mass of the asphalt is 0.3-0.5% of the mass of the basic aggregate.
6. The tunnel concrete pavement paving material as claimed in claim 1, wherein the length of the fibers is 30-120 mm, and the tex of the fibers is 2000-2600 g/Km;
the viscosity of the rubber asphalt at 177 ℃ is 1.5-4.0 Pa.S.
7. A construction method of a tunnel concrete pavement paving material as claimed in any one of claims 1 to 6, comprising the steps of:
(1) repairing the gap of the concrete pavement of the tunnel to be treated to form a pavement to be paved;
(2) after rubber asphalt, fibers and aggregate are sequentially paved on the surface of the pavement to be paved in the step (1), rolling is carried out to form a fiber reinforced asphalt surface wearing layer;
(3) and (3) spreading emulsified asphalt on the fiber reinforced asphalt surface wearing layer in the step (2), and then drying.
8. The construction method according to claim 7, wherein in the step (2), the spreading amount of each component is 2.0-2.6 kg/m based on the surface area of the pavement to be paved2；
The spreading amount of the fiber is 180g/m2(ii) a The spreading amount of the aggregate is 14-18 kg/m2。
9. The construction method according to claim 7 or 8, wherein the time from spreading of the rubber asphalt to completion of rolling in the step (2) is 10-20 min.
10. The construction method according to claim 7 or 8,it is characterized in that in the step (3), the spreading amount of the emulsified asphalt is 0.6-0.8 kg/m based on the surface area of the pavement to be paved2。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT522564B1 (en) * | 2020-01-10 | 2020-12-15 | Oesterreichische Vialit Ges M B H | Binder emulsion with a fiber filler |
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Application publication date: 20200218 |