CN111549608A - Anti-rutting pavement paving method capable of continuously paving base layer and surface layer - Google Patents
Anti-rutting pavement paving method capable of continuously paving base layer and surface layer Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
- C04B28/344—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention discloses an anti-rutting pavement paving method capable of continuously paving a base layer and a surface layer, belonging to the field of road engineering. The method is characterized in that a super early strength anti-cracking cement stabilized macadam base layer is paved, and a cold-mixed cold-paved rigid-flexible composite surface layer is paved under the condition that the surface is still wet after the base layer is rolled. Compared with the prior art, the anti-rutting pavement method capable of continuously paving the base course and the surface course can realize the continuous paving of the cement stabilized macadam base course and the surface course, save the seven-day maintenance time of the cement stabilized macadam base course, improve the continuity of the base course and the surface course, ensure the overall cooperative stress of the pavement structure, and reduce the construction cost without spraying a permeable layer and spreading a macadam seal layer on the surface of the cement stabilized macadam base course. Meanwhile, the cold-mixed cold-laid rigid-flexible composite surface layer does not need concentrated hot mixing, is convenient to construct, saves resources and protects the environment. The anti-rutting pavement structure with the base layer and the surface layer capable of being paved continuously has good high-temperature anti-rutting performance, crack resistance, water stability and durability, and has good popularization and application values.
Description
Technical Field
The invention relates to the field of road engineering, and particularly provides a rut-resistant pavement paving method capable of continuously paving a base layer and a surface layer.
Background
The rutting problem is easy to occur on the special road sections such as heavy-load road sections with large traffic volume, traffic light intersections, parking platforms and BRT special lanes, the service quality and the service life of the asphalt pavement are seriously influenced, a lot of harm is brought to the pavement and pavement users, and the driving comfort is reduced. At present, the prevention and control of the rutting on the asphalt pavement becomes an important research direction for highway technicians.
The asphalt pavement structure is divided into a surface layer and a base layer, wherein the asphalt surface layer in China mainly takes hot-mixed asphalt mixture, and the base layer mainly takes cement stabilized macadam base. The hot-mixed asphalt mixture needs to be heated to more than 140 ℃ by an asphalt mixing station, a large amount of energy is consumed in the heating process, a large amount of harmful gas is generated, and the environment is polluted. The cold-mixed cold-paved asphalt mixture can realize construction at normal temperature, achieves the purposes of energy conservation and emission reduction, and is a new green and environment-friendly technology. Although the cement stabilized macadam mixture base layer is high in rigidity and good in plate body performance, the strength of the base layer is usually low due to water loss during the curing process at the part of 1-2 cm of the surface of the base layer, and a interlayer is formed. And the strength of the cement stabilized macadam mixture needs longer time, the method of using water spraying or emulsified asphalt spraying and the like to preserve the surface layer which can be constructed after seven days is specified, so that the construction period is prolonged to a certain extent, and the construction cost is increased. The asphalt mixture is a flexible material, while the water-stable macadam mixture is a semi-rigid material, and the bonding problem of the asphalt mixture and the water-stable macadam mixture is always a main factor influencing the structural integrity of the asphalt pavement. Many asphalt pavement diseases are caused by the failure of interlayer bonding between a surface layer and a base layer, so that it is important to find a method for effectively improving the interlayer bonding performance between the surface layer and the base layer.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the rut-resistant pavement paving method which has short construction period and strong interlayer cohesiveness and can continuously pave the base layer and the surface layer.
The technical scheme adopted by the invention for solving the technical problems is as follows: the rut resisting road pavement method features that the early strong anticracking cement stabilized macadam base layer is first spread and the cold mixed cold spreading hard and soft composite surface layer is spread in wet state after the base layer is rolled.
The surface is still wet, which means the state between the completion of the rolling of the substrate and the incomplete drying of the substrate surface. In different construction environments, the surface may be still wet within 2 hours, preferably within 1 hour, of the completion of the rolling of the substrate.
Preferably, the ultra-early-strength anti-cracking cement stabilized macadam base layer is paved in two layers, the compaction degree of each layer is not lower than 99%, and the total thickness of the two layers is 32-46 cm.
Preferably, the super early strength anti-cracking cement stabilized macadam mixture is formed by mixing 4-6% of super early strength cement, 4.5-6.5% of water, 83-89% of aggregate and 2.5-4.5% of steel fiber in percentage by mass.
In order to further enhance the crack resistance of the cement stabilized macadam base and increase the interlayer adhesion of the base and the surface, the grading type of the cement stabilized macadam mixture is preferably a broken grading, the construction depth is 2.2-3.0 mm, and the specific grading range is as follows: the passing rate range of the standard sieve pore of 26.5mm is 100 percent; the passing rate range of the standard sieve pore with the diameter of 19mm is 76-90%; the 16mm passing rate range of the standard sieve pore is 68-80%; the passing rate range of a standard sieve pore of 9.5mm is 45-58%; the passing rate range of a standard sieve pore of 4.75mm is 37-47%; the passing rate range of a standard sieve pore of 2.36mm is 15-24%; the passing rate range of the standard sieve pore of 0.6mm is 7-13%; the passing rate range of the standard sieve holes with 0.075mm is 2-5%.
The super early strength cement is preferably magnesium phosphate cement or potassium phosphate cement so as to ensure that the unconfined compressive strength of the cement stabilized macadam mixture within 3 hours after mixing reaches 3-4 MPa, and the base layer can bear the construction load when the large-gap matrix asphalt mixture is paved.
The length of the steel fiber is 22-35 mm, the diameter of the steel fiber is 0.3-0.5 mm, the length-diameter ratio of the steel fiber is 60-80, and the tensile strength of the steel fiber is greater than 400 MPa.
The cold-mixing cold-paving type rigid-flexible composite surface layer is composed of a large-gap matrix asphalt mixture and a cement-based grouting material, the thickness of the composite surface layer is preferably 8-15 cm, the construction depth is preferably 0.8-1.2 mm, and the water seepage coefficient is not more than 30 ml/min.
The porosity of the large-void matrix asphalt mixture is preferably 35-45%, a single-particle-size framework embedding and extruding structure can be adopted, and the specific grading range is as follows: the 19mm passing rate range of the standard sieve pore is 100 percent; the 16mm passing rate range of the standard sieve pore is 92-100%; the passing rate range of the standard sieve pore of 13.2mm is 88-96%; the passing rate range of a standard sieve pore of 9.5mm is 18-63%; the passing rate range of 4.75mm standard sieve holes is 10-20%; the passing rate range of a standard sieve pore of 2.36mm is 3-12%; the passing rate range of standard sieve pores with the diameter of 1.18mm is 2-8%; the passing rate range of the standard sieve pore of 0.6mm is 2-6%; the passing rate range of the standard sieve pore of 0.3mm is 1-5%; the passing rate range of the standard sieve pore of 0.15mm is 1-4%; the passing rate range of the standard sieve holes with 0.075mm is 0-3%.
Preferably, the paving method of the rut-resistant pavement capable of continuously paving the base layer and the surface layer comprises the following specific paving steps:
(1) paving an ultra-early-strength anti-cracking cement stabilized macadam base;
(2) after the base layer compactness is qualified through detection, paving the large-gap matrix asphalt mixture under the condition that the surface is still wet, wherein the loose paving coefficient is 1.05-1.10;
(3) static pressure is carried out for 2-3 times by a road roller, and the degree of compaction is 95-100%;
(4) pouring cement-based grouting material slurry until the slurry is completely filled;
(5) performing surface treatment to ensure the surface anti-skid property;
(6) and (4) opening traffic after curing the cement-based grouting material for 1-3 hours.
The static pressure speed of the road roller in the step (3) is preferably 2.0-3.0 km/h.
And (4) after the cement-based grouting material slurry is completely filled in the step (4), keeping for 3-5min and then performing surface treatment in the step (5) to ensure that the cement-based grouting material can permeate into the base layer.
In the pavement paving method, the ultra-early-strength anti-cracking cement stabilized macadam mixture can realize the rapid formation of the early strength of the base layer, and ensure that the base layer can bear the construction load of the large-gap matrix asphalt mixture; the cold-mixing and cold-paving type large-gap matrix asphalt mixture is constructed at normal temperature, the problem that the temperature of the mixture is too fast to be compacted when the traditional hot-mixing asphalt mixture is constructed in a base layer in a wet state is solved, the porosity of the matrix mixture is high, vibration is not needed during rolling, and the influence on the base layer is small; the ultra-early-strength anti-cracking cement stabilized macadam foundation has enough construction depth, so that the cement-based grouting material permeates into the interior of the foundation when being poured, and the integrity of the foundation and a surface layer is ensured. Through the technical optimization, the continuous construction of the base layer and the surface layer is finally realized.
Compared with the prior art, the rut-resistant pavement paving method capable of continuously paving the base layer and the surface layer has the following outstanding beneficial effects:
the cold-mixed cold-laid rigid-flexible composite surface layer has excellent anti-rutting performance, and the cement-based grouting material permeates into the cement stabilized macadam base layer and is effectively fused with cement in the cement stabilized macadam base layer, so that the continuity of the surface layer and the base layer is ensured, and the whole pavement structure is subjected to synergistic stress. And need spray permeable bed emulsified asphalt between traditional pitch surface course and the cement stabilized macadam basic unit earlier, spread the pitch rubble seal coat again, the difficult assurance of interlayer bonding effect, and construction cost is high.
And (II) the grading type of the traditional cement stabilized macadam mixture is continuous grading, so that the condition of surface cracking caused by insufficient self crack resistance is easy to occur. The grading type of the cement stabilized macadam mixture is fracture grading, so that the crack resistance of the cement stabilized macadam mixture can be greatly improved, and the whole pavement structure is ensured not to crack.
And (III) in the traditional asphalt pavement structure, the cement stabilized macadam base layer needs to be cured for seven days by adopting modes of sprinkling water or spraying emulsified asphalt and the like. The invention realizes the continuous paving construction of the surface layer and the base layer through technical optimization, saves the maintenance time and the maintenance cost and has remarkable social and economic effects.
And (IV) in the traditional construction method, the 1-2 cm part of the surface of the cement stabilized macadam foundation layer is easy to lose water during the curing, the strength of the cement stabilized macadam foundation layer is often low, and a layer of interlayer is formed and becomes a weak link in the pavement structure. According to the construction method, the cold-mixed cold-laid rigid-flexible composite surface layer is immediately paved after the cement stabilized macadam base is rolled, so that the loss of surface moisture during the curing period is avoided, and the uniformity of the strength of the cement stabilized macadam base is ensured.
And (V) the cold-mixed cold-paved rigid-flexible composite surface layer has good water tightness, can effectively prevent moisture from permeating into the pavement structure, and avoids the cement stabilized macadam base layer from being washed away by rainwater, thereby improving the overall durability of the pavement structure.
Drawings
FIG. 1 is a flow chart of paving process of anti-rut road surface with continuous paving of base layer and surface layer.
Detailed Description
The invention is further described with reference to the following figures and specific examples, which are not intended to be limiting.
[ EXAMPLES one ]
The anti-rutting pavement paving structure with the base layer and the surface layer capable of being continuously paved in the embodiment is composed of a 18cm lower base layer of the super early strength anti-cracking type cement stabilized macadam, a 18cm upper base layer of the super early strength anti-cracking type cement stabilized macadam and a 10cm cold-mixing cold-paving type rigid-flexible composite surface layer which are paved from bottom to top.
The super early strength anti-cracking type cement stabilized macadam lower base layer and the super early strength anti-cracking type cement stabilized macadam upper base layer are prepared by mixing the following materials in percentage by mass:
the concrete gradation of the ultra-early-strength anti-cracking cement stabilized macadam mixture is as follows:
the passing rate range of the standard sieve pore of 26.5mm is 100 percent; the 19mm passing rate range of the standard sieve pore is 83.9 percent; the 16mm passing rate range of the standard sieve pore is 75.1 percent; the passing rate range of a standard sieve pore of 9.5mm is 52.5 percent; the passing rate range of a standard sieve pore of 4.75mm is 43.0 percent; the passing rate range of a standard sieve pore of 2.36mm is 20.3 percent; the passing rate range of the standard sieve pore of 0.6mm is 9.6 percent; the standard sieve hole 0.075mm passing rate range is 4.3%.
The steel fiber used has the length of 28mm, the diameter of 0.39mm, the length-diameter ratio of 71.8 and the tensile strength of 455 MPa.
The unconfined compressive strength measured value of the ultra-early-strength anti-cracking type cement stabilized macadam mixture is 3.3MPa after 3 hours of mixing.
The cold-mixing cold-paving type rigid-flexible composite surface layer is composed of a large-gap matrix asphalt mixture and a cement-based grouting material.
The indoor design void ratio of the large-void matrix asphalt mixture is 38.8%, and the specific gradation is as follows:
the passing rate of a standard sieve pore with 19mm is 100 percent; the passing rate of a standard sieve pore with 16mm is 96.3 percent; the passing rate of a standard sieve pore of 13.2mm is 93.8 percent; the passing rate of a standard sieve pore of 9.5mm is 36.5 percent; the passing rate of a standard sieve pore with 4.75mm is 15.7 percent; the passing rate of a standard sieve pore of 2.36mm is 9.2 percent; the passing rate of a standard sieve pore of 1.18mm is 6.0 percent; the passing rate of a standard sieve pore of 0.6mm is 4.3 percent; the passing rate of a standard sieve pore of 0.3mm is 3.1 percent; the passing rate of a standard sieve pore of 0.15mm is 1.8 percent; the passing rate of a standard sieve pore of 0.075mm is 1.2 percent.
The high-temperature anti-rutting performance of the cold-mixed cold-laid rigid-flexible composite surface layer mixture is verified by adopting a rutting test, the detection result is 16982 times/mm, the requirement that the upper surface layer is far greater than the existing specification and is not less than 3000 times/mm, and the rutting resistance performance is good.
As shown in the attached figure 1, the concrete construction method comprises the following steps:
a. super early-strength anti-cracking cement stabilized macadam base pavement
Paving two layers of ultra-early-strength anti-cracking cement stabilized macadam base layers by adopting a double-layer continuous paving process, wherein the compaction degree measured value of the lower base layer is 99.2%, and the construction depth is 2.6 mm; the upper base layer has a measured value of 99.6% and a depth of structure of 2.5 mm.
b. Large-gap matrix asphalt mixture paving
And (3) when the upper base layer is paved for 50 minutes, the surface of the upper base layer is not completely dried and is still in a wet state, and the large-gap matrix asphalt mixture is paved, wherein the loose paving coefficient is 1.08.
c. Rolling of large void matrix asphalt mixture
c-1, after paving the large-gap matrix asphalt mixture, carrying out static pressure 3 times by adopting a 12T double-steel-wheel road roller, wherein the compaction speed is 2.5km/h, and the measured value of the compaction degree is 98.6%;
c-2, the flatness of the matrix asphalt mixture after rolling is 0.5mm, and the requirement that the upper layer is smaller than 1.2mm in the existing specification is met.
d. Cement-based slurry pouring construction
d-1, grouting and edge sealing
Before grouting, the sealing strips and corresponding plugging materials are adopted to enclose and block the periphery of the large-gap matrix asphalt mixture, so that the situation that the slurry flows out to cause the incomplete filling and pollute the side road surface or the curb is avoided.
d-2, preparation of slurry
The cement-based grouting material and water are subjected to slurry preparation on site through a pulping device, the stirring process comprises the steps of firstly adding the water into a stirring pot, then adding the cement-based grouting material, wherein the ratio of the cement-based grouting material to the water is 1:0.3, and the stirring time is 3 min.
d-3, slurry perfusion
And (4) adopting slurry pumping equipment to pour the slurry. During filling, the slurry pumping pipe head is lowered as much as possible to carry out self-flowing filling, so that the phenomenon that the slurry is splashed due to overhigh spraying to influence the filling effect is avoided. And when the slurry stays for 4min after full filling, the slurry does not seep downwards any more and is fully filled (the surface after full filling does not generate bubbles as a judgment standard).
d-4, finishing
Surface treatment is carried out by adopting plastering equipment, and redundant slurry on the surface of the asphalt mixture is scraped completely, so that the road surface generates a stone exposed structure, and the road surface is safe, anti-skidding and attractive. The measured value of the surface structure depth is 1.1mm, and the measured value of the water permeability coefficient is 12 ml/min.
e. Pavement health preserving
The cement-based grouting material needs to be cured for a certain time to generate strength, and the strength is judged according to the weather and temperature conditions of the construction site on the same day, and the traffic is opened 1.5h after grouting construction is finished.
Before opening traffic, coring detection is carried out on the road surface. The results show that the surface layer and the base layer form a whole, and the interlayer adhesiveness is good. The total thickness of the core sample is 45.8cm, wherein the thickness of the surface layer is 10.3cm, and the thickness of the base layer is 35.5 cm. Hamburger wheel rutting test detection is carried out on the surface layer core sample to test the high-temperature anti-rutting capability, and the detection result is shown in table 1.
TABLE 1 hamburger rut test results
Test results show that the surface layer has excellent high-temperature anti-rutting capability.
[ example two ]
The anti-rutting pavement paving structure with the base layer and the surface layer capable of being continuously paved in the embodiment is composed of a 20cm lower base layer of the super early strength anti-cracking type cement stabilized macadam, a 20cm upper base layer of the super early strength anti-cracking type cement stabilized macadam and a 12cm cold-mixing cold-paving type rigid-flexible composite surface layer which are paved from bottom to top.
The super early strength anti-cracking type cement stabilized macadam lower base layer and the super early strength anti-cracking type cement stabilized macadam upper base layer are prepared by mixing the following materials in percentage by mass:
the concrete gradation of the ultra-early-strength anti-cracking cement stabilized macadam mixture is as follows:
the passing rate range of the standard sieve pore of 26.5mm is 100 percent; the 19mm passing rate range of the standard sieve pore is 82.1 percent; the 16mm passing rate range of the standard sieve pore is 73.2 percent; the passing rate range of a standard sieve pore of 9.5mm is 49.6 percent; the passing rate range of a standard sieve pore of 4.75mm is 40.7 percent; the passing rate range of the standard sieve pore of 2.36mm is 18.7 percent; the passing rate range of the standard sieve pore of 0.6mm is 8.8 percent; the standard sieve hole 0.075mm passing rate range is 3.7%.
The steel fiber used has the length of 32mm, the diameter of 0.43mm, the length-diameter ratio of 74.4 and the tensile strength of 473 MPa.
The unconfined compressive strength measured value of the ultra-early-strength anti-cracking type cement stabilized macadam mixture is 3.7MPa after 3 hours of mixing.
The cold-mixing cold-paving type rigid-flexible composite surface layer is composed of a large-gap matrix asphalt mixture and a cement-based grouting material.
The indoor design void ratio of the large-void matrix asphalt mixture is 38.8%, and the specific gradation is as follows:
the passing rate of a standard sieve pore with 19mm is 100 percent; the passing rate of a standard sieve pore with 16mm is 93.8 percent; the passing rate of a standard sieve pore of 13.2mm is 90.5 percent; the passing rate of a standard sieve pore of 9.5mm is 27.6 percent; the passing rate of a standard sieve pore with 4.75mm is 12.9 percent; the passing rate of a standard sieve pore of 2.36mm is 6.6 percent; the passing rate of a standard sieve pore of 1.18mm is 5.2 percent; the passing rate of a standard sieve pore of 0.6mm is 3.3 percent; the passing rate of a standard sieve pore of 0.3mm is 2.5 percent; the passing rate of a standard sieve pore of 0.15mm is 1.2 percent; the passing rate of a standard sieve pore of 0.075mm is 0.7%.
The high-temperature anti-rutting performance of the cold-mixed cold-paved rigid-flexible composite surface layer mixture is verified by adopting a rutting test, the detection result is 18560 times/mm, the rutting resistance is far greater than the requirement that the upper surface layer is not less than 3000 times/mm in the existing specification, and the rutting resistance is good.
As shown in the attached figure 1, the concrete construction method comprises the following steps:
a. super early-strength anti-cracking cement stabilized macadam base pavement
Paving two layers of ultra-early-strength anti-cracking cement stabilized macadam base layers by adopting a double-layer continuous paving process, wherein the compaction degree measured value of the lower base layer is 99.0%, and the construction depth is 2.7 mm; the upper base layer has a measured value of 99.5% compactibility and a structural depth of 2.8 mm.
b. Large-gap matrix asphalt mixture paving
And (4) when the upper base layer is paved for 45 minutes, the surface of the upper base layer is not completely dried and is still in a wet state, and the large-gap matrix asphalt mixture is paved, wherein the loose paving coefficient is 1.10.
c. Rolling of large void matrix asphalt mixture
c-1, after paving the large-gap matrix asphalt mixture, carrying out static pressure 2 times by using a 12T double-steel-wheel road roller, wherein the compaction speed is 2.5km/h, and the measured value of the compaction degree is 96.3%;
c-2, the flatness of the matrix asphalt mixture after rolling is 0.4mm, and the requirement that the upper layer is smaller than 1.2mm in the existing specification is met.
d. Cement-based slurry pouring construction
d-1, grouting and edge sealing
Before grouting, the sealing strips and corresponding plugging materials are adopted to enclose and block the periphery of the large-gap matrix asphalt mixture, so that the situation that the slurry flows out to cause the incomplete filling and pollute the side road surface or the curb is avoided.
d-2, preparation of slurry
The cement-based grouting material and water are subjected to slurry preparation on site through a pulping device, the stirring process comprises the steps of firstly adding the water into a stirring pot, then adding the cement-based grouting material, wherein the ratio of the cement-based grouting material to the water is 1:0.3, and the stirring time is 3 min.
d-3, slurry perfusion
And (4) adopting slurry pumping equipment to pour the slurry. During filling, the slurry pumping pipe head is lowered as much as possible to carry out self-flowing filling, so that the phenomenon that the slurry is splashed due to overhigh spraying to influence the filling effect is avoided. And when the slurry stays for 3min after full filling, the slurry does not seep downwards any more and is fully filled (the surface after full filling does not generate bubbles as a judgment standard).
d-4, finishing
Surface treatment is carried out by adopting plastering equipment, and redundant slurry on the surface of the asphalt mixture is scraped completely, so that the road surface generates a stone exposed structure, and the road surface is safe, anti-skidding and attractive. The measured value of the surface structure depth is 1.0mm, and the measured value of the water permeability coefficient is 16 ml/min.
e. Pavement health preserving
The cement-based grouting material needs to be cured for a certain time to generate strength, and the strength is judged according to the weather and temperature conditions of the construction site on the same day, and the traffic is opened 1h after grouting construction is finished.
Before opening traffic, coring detection is carried out on the road surface. The results show that the surface layer and the base layer form a whole, and the interlayer adhesiveness is good. The total thickness of the core sample is 52.9cm, wherein the thickness of the surface layer is 12.6cm, and the thickness of the base layer is 40.3 cm. Hamburger wheel rutting test detection is carried out on the surface layer core sample to test the high-temperature anti-rutting capability, and the detection result is shown in table 2.
TABLE 2 hamburger rut test results
Test results show that the surface layer has excellent high-temperature anti-rutting capability.
The above-described embodiments are merely preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (10)
1. The rut resisting road paving method with base layer and surface layer capable of being paved continuously features that: paving a super early-strength anti-cracking cement stabilized macadam base layer, and paving a cold-mixed cold-laid rigid-flexible composite surface layer in a wet state on the surface of the base layer after the base layer is rolled.
2. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 1, and is characterized in that: the ultra-early-strength anti-cracking cement stabilized macadam base layer is paved in two layers, the compactness of each layer is not lower than 99%, and the total thickness of the two layers is 32-46 cm.
3. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 2, and is characterized in that: the super early strength anti-cracking type cement stabilized macadam mixture is formed by mixing 4-6% of super early strength cement, 4.5-6.5% of water, 83-89% of aggregate and 2.5-4.5% of steel fibers in percentage by mass.
4. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 3, wherein the method comprises the following steps: the grading type of the super early-strength anti-cracking cement stabilized macadam mixture is a broken grading, the construction depth is 2.2-3.0 mm, and the specific grading range is as follows:
the passing rate range of the standard sieve pore of 26.5mm is 100 percent; the passing rate range of the standard sieve pore with the diameter of 19mm is 76-90%; the 16mm passing rate range of the standard sieve pore is 68-80%; the passing rate range of a standard sieve pore of 9.5mm is 45-58%; the passing rate range of a standard sieve pore of 4.75mm is 37-47%; the passing rate range of a standard sieve pore of 2.36mm is 15-24%; the passing rate range of the standard sieve pore of 0.6mm is 7-13%; the passing rate range of the standard sieve holes with 0.075mm is 2-5%.
5. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 3, wherein the method comprises the following steps: the super early strength cement is magnesium phosphate cement or potassium phosphate cement.
6. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 3, wherein the method comprises the following steps: the length of the steel fiber is 22-35 mm, the diameter of the steel fiber is 0.3-0.5 mm, the length-diameter ratio of the steel fiber is 60-80, and the tensile strength of the steel fiber is greater than 400 MPa.
7. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 1, and is characterized in that: the cold-mixing cold-paving type rigid-flexible composite surface layer is composed of a large-gap matrix asphalt mixture and a cement-based grouting material, the thickness of the composite surface layer is 8-15 cm, the construction depth is 0.8-1.2 mm, and the water seepage coefficient is not more than 30 ml/min.
8. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 7, wherein the method comprises the following steps: the void ratio of the large-void matrix asphalt mixture is 35-45%, a single-particle-size framework embedding and extruding structure is adopted, and the specific grading range is as follows:
the 19mm passing rate range of the standard sieve pore is 100 percent; the 16mm passing rate range of the standard sieve pore is 92-100%; the passing rate range of the standard sieve pore of 13.2mm is 88-96%; the passing rate range of a standard sieve pore of 9.5mm is 18-63%; the passing rate range of 4.75mm standard sieve holes is 10-20%; the passing rate range of a standard sieve pore of 2.36mm is 3-12%; the passing rate range of standard sieve pores with the diameter of 1.18mm is 2-8%; the passing rate range of the standard sieve pore of 0.6mm is 2-6%; the passing rate range of the standard sieve pore of 0.3mm is 1-5%; the passing rate range of the standard sieve pore of 0.15mm is 1-4%; the passing rate range of the standard sieve holes with 0.075mm is 0-3%.
9. The method for paving the rut-resistant pavement, which can continuously pave the base layer and the surface layer, according to claim 1, is characterized in that the concrete paving steps are as follows:
(1) paving an ultra-early-strength anti-cracking cement stabilized macadam base;
(2) after the base layer compactness is qualified through detection, paving the large-gap matrix asphalt mixture under the condition that the surface is still wet, wherein the loose paving coefficient is 1.05-1.10;
(3) static pressure is carried out for 2-3 times by a road roller, and the degree of compaction is 95-100%;
(4) pouring cement-based grouting material slurry until the slurry is completely filled;
(5) performing surface treatment to ensure the surface anti-skid property;
(6) and (4) opening traffic after curing the cement-based grouting material for 1-3 hours.
10. The method for paving the rut-resistant pavement which can continuously pave the base layer and the surface layer according to claim 9, wherein the method comprises the following steps: and after the cement-based grouting material slurry is completely filled, keeping for 3-5min and then carrying out surface treatment.
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