CN217378443U - Ultra-thin bituminous pavement of high-grade highway - Google Patents
Ultra-thin bituminous pavement of high-grade highway Download PDFInfo
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Abstract
The utility model provides an ultra-thin asphalt pavement of high-grade highway, it is exclusively used in highway and first-grade highway, it includes ultra-thin asphalt surface course, tie coat, anti-brittle fracture anti-shrinkage-cracking semi-rigid base course, subbase and soil matrix, ultra-thin asphalt surface course, tie coat, anti-brittle fracture anti-shrinkage-cracking semi-rigid base course, subbase and soil matrix top-down arrange, ultra-thin asphalt surface course paves on anti-brittle fracture anti-shrinkage-fracture semi-rigid base course, combine through the tie coat between ultra-thin asphalt surface course and the anti-brittle fracture anti-shrinkage-cracking semi-rigid base course; the ultrathin asphalt pavement for the high-grade highway has the ultrathin asphalt surface course thickness of 60-119 mm and the ultrathin asphalt surface course thickness of 60-99 mm. The utility model discloses reduced the road surface rut disease, saved the road surface maintenance fund in a large number, eliminated bituminous paving early damage phenomenon, extension road surface life.
Description
Technical Field
The utility model belongs to the technical field of highway bituminous paving constructs, concretely relates to ultra-thin bituminous paving of high-grade highway, it is exclusively used in highway and one-level highway.
Background
The road grade is divided according to the use task, service function, technical difficulty and traffic capacity of the road, and the road is divided into five grades of a highway, a first-grade road, a second-grade road, a third-grade road and a fourth-grade road (the digital grading is a traditional grade system). The main components of the highway are roadbed, road surface, bridge, culvert, ferry dock, tunnel, greening, communication and lighting equipment and other facilities along the line. The high-grade highway refers to a highway which is built by adopting high design requirements and high construction standards so as to have high traffic capacity, and comprises an expressway and a first-grade highway. The high-grade highway has the characteristics of flat road surface, straight route, wide lane, high speed limit and the like.
At present, more than 90% of high-grade highways in China are asphalt pavements. The current 'road asphalt pavement design Specification' JTG D50-2006 entry in China states 4.2.1 regulation: the minimum thickness of the asphalt layer of the expressway is 120mm, and the minimum thickness of the asphalt layer of the first-level expressway is 100 mm. In fact, the thickness of the asphalt pavement commonly adopted by domestic expressways at present is 180 mm-400 mm, the thickness of the asphalt pavement commonly adopted by first-level expressways is 150 mm-260 mm, and the development trend of the asphalt pavement with larger thickness is still existed, and the full-thickness asphalt pavement (a semi-rigid base layer is replaced by an asphalt layer) is existed.
The asphalt surface layer of the high-grade highway is thick, so that ruts are easy to appear, which is also the situation often seen when the high-grade highway runs; the asphalt surface layer is large in thickness and not easy to cause displacement damage, so that the bonding layer of the high-grade highway cannot play a due role and is ignored, the asphalt surface layer becomes an independent bending-resistant structural layer, and the asphalt surface layer is often subjected to bending-pulling fatigue damage; the asphalt surface layer loses due flow limiting effect due to too thick asphalt surface layer, and further temperature gradient cracks occur in the asphalt surface layer; particularly, the rut disease is a major technical problem which is not solved all the time for high-grade highways, and in order to reduce rut, a large amount of capital must be invested to add the asphalt modifier, so that the later maintenance cost is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a high-grade highway ultra-thin bituminous pavement, it has not only solved the technical problem that prior art exists to save the resource, save the fund, economic environmental protection accords with the development strategy of china's low carbon economy.
According to the technical scheme of the utility model, a high-grade highway ultra-thin asphalt pavement is provided, it is exclusively used in highway and first-level highway, it includes ultra-thin asphalt surface course, tie coat, anti-brittle fracture anti-shrinkage-cracking semi-rigid base course, subbase and soil matrix, ultra-thin asphalt surface course, tie coat, anti-brittle fracture anti-shrinkage-cracking semi-rigid base course, subbase and soil matrix arrange from top to bottom, ultra-thin asphalt surface course is paved on anti-brittle fracture anti-shrinkage-cracking semi-rigid base course, combine through the tie coat between ultra-thin asphalt surface course and the anti-brittle fracture anti-shrinkage-cracking semi-rigid base course; the ultrathin asphalt pavement for the high-grade highway is 60-119 mm in thickness of an ultrathin asphalt surface layer suitable for the highway and 60-99 mm in thickness of an ultrathin asphalt surface layer suitable for the first-grade highway.
The brittle fracture-resistant and shrinkage-resistant semi-rigid base layer comprises any one of brittle fracture-resistant and shrinkage-resistant cement stabilized macadam, brittle fracture-resistant and shrinkage-resistant basalt fiber cement stabilized macadam, brittle fracture-resistant and shrinkage-resistant second-ash stabilized macadam, brittle fracture-resistant and shrinkage-resistant basalt fiber second-ash stabilized macadam, brittle fracture-resistant and shrinkage-resistant fly ash cement stabilized macadam or brittle fracture-resistant basalt fiber fly ash cement stabilized macadam.
Preferably, in the brittle fracture and shrinkage resistant semi-rigid base layer using the brittle fracture and shrinkage resistant cement-stabilized macadam as a main material, the compaction thickness of the whole brittle fracture and shrinkage resistant semi-rigid base layer is greater than or equal to 300 mm.
Further, in a brittle fracture-resistant and shrinkage-resistant semi-rigid base layer using brittle fracture-resistant and shrinkage-resistant basalt fiber two-ash stabilized macadam as a main material, the macadam includes basalt fiber.
Use the utility model discloses an ultra-thin bituminous paving of high-grade highway compares in prior art, has following technological effect: 1. the track diseases of the pavement are reduced, and the pavement maintenance fund is greatly saved; 2. the phenomenon of early damage of the asphalt pavement is eliminated, and the construction fund of the highway is saved; 3. the service life of the pavement is prolonged, the asphalt pavement with long service life can be built, and a large amount of highway construction funds are saved; 4. saves the raw material of asphalt, saves energy and protects environment.
Drawings
Fig. 1 is a first pavement structure diagram of a high-grade highway ultrathin asphalt pavement according to the utility model;
fig. 2 is a second pavement structure diagram of the high-grade highway ultrathin asphalt pavement according to the present invention;
fig. 3 is a third pavement structure diagram of the high-grade highway ultrathin asphalt pavement according to the utility model;
fig. 4 is a schematic view of a fourth pavement structure of the high-grade ultrathin asphalt pavement for highways according to the present invention;
fig. 5 is a schematic view of a fifth pavement structure of the high-grade ultrathin asphalt pavement for highways according to the present invention;
fig. 6 is a sixth pavement structure diagram of the high-grade ultra-thin asphalt pavement according to the present invention;
fig. 7 is a schematic view of a seventh pavement structure of the high-grade ultrathin asphalt pavement for highways according to the present invention;
fig. 8 is a schematic view of an eighth pavement structure of the high-grade highway ultrathin asphalt pavement according to the present invention;
fig. 9 is a schematic view of a ninth pavement structure of the ultra-thin asphalt pavement for a high-grade highway according to the present invention;
fig. 10 is a tenth pavement structure diagram of the high-grade ultrathin road asphalt pavement according to the present invention;
fig. 11 is a schematic view of an eleventh pavement structure of the ultra-thin asphalt pavement for high-grade roads according to the present invention;
fig. 12 is a twelfth pavement structure diagram of the high-grade ultrathin asphalt pavement for highways according to the present invention.
The reference numbers in the drawings are as follows: 1. an ultrathin asphalt surface layer; 2. a bonding layer; 3. a brittle fracture resistant, shrinkage fracture resistant semi-rigid base layer; 4. an underlayer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.
The utility model provides an ultra-thin bituminous paving of high-grade highway, it is exclusively used in highway and one-level highway, it includes ultra-thin asphalt surface course 1, tie coat 2, anti brittle fracture anti-shrinkage-cracking semi-rigid basic unit 3, underlayment 4 and soil matrix, ultra-thin asphalt surface course, the tie coat, anti brittle fracture anti-shrinkage-cracking semi-rigid basic unit, underlayment and soil matrix top-down arrange, ultra-thin asphalt surface course paves on anti brittle fracture anti-shrinkage-cracking semi-rigid basic unit, combine through the tie coat between ultra-thin asphalt surface course and the anti brittle fracture anti-shrinkage-cracking semi-rigid basic unit.
The utility model discloses the ultra-thin asphalt surface course thickness of high-grade highway ultra-thin asphalt pavement is totally different with present highway asphalt pavement design standard JTG D50-2006 (hereinafter referred to as "standard"), and the standard stipulates highway asphalt surface course minimum thickness 120mm, and first-grade highway asphalt surface course minimum thickness 100mm, the utility model discloses the ultra-thin asphalt surface course thickness that is applicable to the highway of high-grade highway ultra-thin asphalt pavement generally is 60 mm-119 mm, and the ultra-thin asphalt surface course thickness that is applicable to the first-grade highway generally is 60 mm-99 mm; the utility model discloses ultra-thin asphalt pavement's of high-grade highway ultra-thin asphalt pavement ultra-thin asphalt surface course is laid on anti brittle fracture anti-shrinkage crack semi-rigid basic unit, uses with anti brittle fracture anti-shrinkage crack semi-rigid basic unit cooperation.
The utility model discloses tie coat in the ultra-thin bituminous paving of high-grade highway, the tie coat includes AH90 number pitch and particle size 0.3 cm-0.6 cm rubble or particle size 0.5 cm-1.0 cm rubble. The bonding layer is formed or manufactured by the following process: heating asphalt H90 to 140 deg.CSpreading on the brittle-fracture-resistant and shrinkage-resistant semi-rigid base layer at-180 ℃ in an amount of 0.6Kg/m 2 —1.0Kg/m 2 (ii) a Spreading crushed stone with particle size of 0.3-0.6 cm in 0.002m 3 /m 2 Or spreading crushed stone with particle size of 0.5-1.0 cm in 0.003m 3 /m 2 . Screening the crushed stone by adopting mechanical screening equipment and removing impurities, preferably heating H90 asphalt to 140-180 ℃, keeping the temperature constant and maintaining the temperature for 20-30 minutes, thinning the H90 asphalt for convenient spreading, wherein the spreading amount of the H90 asphalt is related to the spreading thickness; the size of the crushed stones in this example is related to the amount of scattering. The numerical values in this example were data calculated for an accurate experiment.
In another embodiment, the utility model discloses tie coat in the ultra-thin bituminous paving of high-grade highway, the tie coat includes AH70# asphalt and particle size 0.3 cm-0.6 cm rubble or particle size 0.5 cm-1.0 cm rubble. The bonding layer is formed or manufactured by the following process: heating AH70 asphalt to 140-180 deg.C, spreading on the brittle fracture-resistant shrinkage-resistant semi-rigid base layer at 0.6Kg/m 2 —1.0Kg/m 2 (ii) a Spreading 0.3-0.6 cm of broken stone at a dose of 0.002m 3 /m 2 Or spreading 0.5-1.0 cm of broken stone at a dose of 0.003m 3 /m 2 . Screening the crushed stone by adopting mechanical screening equipment and removing impurities, preferably heating H70 asphalt to 140-180 ℃, keeping the temperature constant and preserving for 20-30 minutes, thinning the H70 asphalt for facilitating spreading, wherein the spreading amount of the H70 asphalt is related to the spreading thickness; the size of the crushed stones in this example is related to the amount of scattering. The numerical values in this example were calculated for accurate experiments to obtain data.
In yet another embodiment, the present invention provides a tie coat for a high grade highway ultrathin asphalt pavement, the tie coat comprising SBS modified asphalt and crushed stone with a particle size of 0.3cm to 0.6cm or 0.5cm to 1.0 cm. The bonding layer is formed or manufactured by the following process: the SBS modified asphalt is heated to 150 ℃ to 200 ℃, and is spread on the brittle fracture and shrinkage resistant semi-rigid base layer with the dosage of 0.8Kg/m 2 —1.2Kg/m 2 (ii) a Spreading 0.3-0.6 cm of crushed stone in an amount of 0.002m 3 /m 2 (ii) a Or spread 0.5crushed stone of cm to 1.0cm and the dosage of 0.003m 3 /m 2 . Screening the broken stone by adopting mechanical screening equipment and removing impurities, preferably heating SBS modified asphalt to 150-200 ℃, keeping the temperature constant and maintaining for 20-30 minutes, thinning the SBS modified asphalt for convenient spreading, wherein the spreading amount of the SBS modified asphalt is related to the spreading thickness; the size of the crushed stones in this example is related to the amount of spreading. The numerical values in this example were data calculated for an accurate experiment.
The utility model discloses an anti-brittle-fracture anti-shrinkage semi-rigid base course in the high-grade highway ultrathin asphalt pavement, the anti-brittle-fracture anti-shrinkage semi-rigid base course mainly comprises any broken stone of anti-brittle-fracture anti-shrinkage cement stabilized broken stone, anti-brittle-fracture anti-shrinkage basalt fiber two-ash stabilized broken stone, anti-brittle-fracture anti-shrinkage pulverized coal ash cement stabilized broken stone or anti-brittle-fracture basalt fiber fly ash cement stabilized broken stone, in the optimized embodiment, the concrete can be combined by two or three of brittle fracture-resistant and anti-cracking cement-stabilized macadam, brittle fracture-resistant and anti-cracking basalt fiber and anti-cracking second ash-stabilized macadam, brittle fracture-resistant and anti-cracking flyash cement-stabilized macadam or brittle fracture-resistant basalt fiber and flyash cement-stabilized macadam. When any one of the brittle-fracture-resistant and anti-cracking cement-stabilized macadam, the brittle-fracture-resistant and anti-cracking basalt fiber cement-stabilized macadam, the brittle-fracture-resistant and anti-cracking secondary-ash-stabilized macadam, the brittle-fracture-resistant and anti-cracking basalt fiber secondary-ash-stabilized macadam, the brittle-fracture-resistant and anti-cracking fly ash cement-stabilized macadam or the brittle-fracture-resistant basalt fiber fly ash cement-stabilized macadam is selected, proper cement is selected and added as a bonding agent, and the brittle-fracture-resistant and anti-cracking semi-rigid base layer is formed.
Specifically, the composition and the manufacturing implementation process of various brittle-fracture-resistant and shrinkage-fracture-resistant semi-rigid base materials are as follows:
(1) brittle fracture and shrink resistant cement stabilized macadam, wherein the macadam or grit composition used is as in table 1 below:
TABLE 1
The size of the sieve pores refers to the size of the sieve pores of the sieve body of mechanical screening, and the grading range refers to the distribution condition of aggregate particle size particles of the crushed stone at all levels, and the grading range is controlled to solve the problems of high dust content, needle-shaped particles, weak quality, high weathered particle content, uneven grading, unstable specification, poor particle composition consistency, large change and the like of the crushed stone to a certain extent in order to ensure the construction quality of engineering.
The method comprises the steps of adopting the crushed stone or gravel gradation in the table 1 when the brittle-fracture-resistant and shrinkage-resistant cement stabilized crushed stone is used as the brittle-fracture-resistant and shrinkage-resistant semi-rigid base layer of the main material, simultaneously applying cement accounting for 3.0-4.0 percent of the mass ratio of the total material to uniformly mix the crushed stone or the gravel, maintaining for 5-10 days, preferably applying pressure construction with unconfined compressive strength of 2.5-4.0 MPa for 7 days, and simultaneously performing rolling forming at the temperature of-2-33 ℃, wherein the compacted thickness of one layer (the whole layer) of the brittle-fracture-resistant and shrinkage-resistant semi-rigid base layer is greater than or equal to 300 mm. Preferably, the sub-base layer has a thickness of 180mm to 360 mm.
(2) Brittle fracture and shrink resistant basalt fiber cement stabilized macadam wherein macadams or grit grades are used as in table 1 above:
the brittle fracture-resistant and shrinkage-resistant basalt fiber cement stabilized macadam serving as a main material of the brittle fracture-resistant and shrinkage-resistant semi-rigid base layer adopts the broken stone or gravel gradation in the table 1, and meanwhile, the compacted thickness of one layer (whole layer) of the brittle fracture-resistant and shrinkage-resistant basalt fiber cement stabilized macadam is more than or equal to 280mm, wherein the basalt fiber specification is fiber yarn, and the dosage is 3.2 Kg-6.0 Kg/m 3 (ii) a Applying cement accounting for 3.0-4.0% of the total material mass ratio, uniformly mixing, curing for 5-10 days, preferably 7 days, implementing pressure construction with unconfined compressive strength of 2.5-4.0 MPa, and simultaneously rolling at-2-33 ℃. Preferably, the sub-base layer has a thickness of 180mm to 360 mm.
(3) Brittle fracture and shrinkage crack resistant stabilized macadam, wherein the macadam or gravel composition used is as follows in table 2:
the brittle fracture and shrinkage crack resistant semi-rigid base layer using the brittle fracture and shrinkage crack resistant second-ash stabilized macadam as a main material comprises macadams or gravels, slaked lime and fly ash, the macadam or gravel gradation in the table 2 is adopted, and meanwhile, the compacted thickness of one layer (whole layer) of the brittle fracture and shrinkage crack resistant second-ash stabilized macadam is more than or equal to 280mm, wherein the mass ratio of each component is that the slaked lime accounts for 5-9 parts; 10-15 parts of fly ash, 70-85 parts of gravel (or gravel), and preferably slaked lime: fly ash: crushed stone (or gravel) 7:13: 80. Mixing broken stone or gravel, slaked lime and fly ash, uniformly mixing cement accounting for 3.0-4.0 percent of the total material mass ratio, curing for 5-10 days, preferably 7 days, implementing pressure construction with unconfined compressive strength of 2.5-4.0 MPa, and simultaneously rolling and forming at-2-33 ℃. Preferably, the sub-base layer has a thickness of 180mm to 360 mm.
(4) Brittle fracture and shrinkage resistant basalt fiber two-ash stabilized macadam, wherein the macadam or gravel grade adopted is as in table 2 above:
the brittle fracture and shrinkage resistant semi-rigid base layer using the brittle fracture and shrinkage resistant basalt fiber two-ash stabilized macadam as a main material comprises macadam or gravel, slaked lime and fly ash, the macadam or gravel grading in the table 2 is adopted, the macadam or gravel comprises basalt fibers, and the basalt fibers are in fiber yarns. The compaction thickness of one layer (whole layer) of brittle fracture-resistant and shrinkage-resistant basalt fiber two-ash stabilized macadam is more than or equal to 260 mm; the basalt fiber is fiber yarn in 3.2-6.0 Kg/m 3 (ii) a The mass ratio of each component is that the slaked lime accounts for 5 to 9 parts; 10-15 parts of fly ash, 70-85 parts of gravel (or gravel), and preferably slaked lime: fly ash: crushed stone (or gravel) 5-7:13: 80. Stirring and mixing broken stone or gravel, slaked lime and fly ash, uniformly mixing cement accounting for 3.0-4.0 percent of the total material mass ratio, curing for 5-10 days, preferably 7 days, implementing pressure construction with unconfined compressive strength of 2.5-4.0 MPa, and simultaneously rolling and forming at-2-33 ℃. Preferably, the substrateThe layer thickness is 180 mm-360 mm.
(5) Brittle fracture and shrinkage crack resistant fly ash cement stabilized macadam, wherein the adopted macadam or gravel is graded as shown in the table 1:
the brittle fracture and shrinkage crack resistant semi-rigid base layer which uses the brittle fracture and shrinkage crack resistant fly ash cement stabilized macadam as a main material comprises macadam or gravel and fly ash, and the macadam or gravel grading in the table 1 is adopted; the compaction thickness of one layer (whole layer) of the brittle fracture and shrinkage crack resistant fly ash cement stabilized macadam is more than or equal to 280 mm; wherein the mass ratio of each component is that the fly ash accounts for 2 to 8 parts, the broken stone (or gravel) accounts for 92 to 98 parts, and the fly ash is preferably selected from the following components: crushed stone (or gravel) 4: 96. Stirring and mixing broken stones or gravel and fly ash, uniformly mixing cement accounting for 3.0-4.0 percent of the total material mass ratio, curing for 5-10 days, preferably 7 days, implementing pressure construction with unconfined compressive strength of 2.5-4.0 MPa, and simultaneously rolling and forming at-2-33 ℃. Preferably, the sub-base layer has a thickness of 180mm to 360 mm.
(6) The brittle-fracture-resistant basalt fiber fly ash cement stabilized macadam is characterized in that the adopted macadam or gravel is graded as shown in the table 1:
the brittle fracture-resistant and shrinkage crack-resistant semi-rigid base layer using the brittle fracture-resistant basalt fiber fly ash cement stabilized macadam as a main material comprises basalt fiber, macadam or gravel and fly ash, and the macadam or gravel grading in the table 1 is adopted; the compaction thickness of one layer (whole layer) of the brittle fracture and shrinkage crack resistant fly ash cement stabilized macadam is more than or equal to 260 mm; preferably, the sub-base layer has a thickness of 180mm to 360 mm.
Wherein the mass ratio of each component is that fly ash accounts for 2 to 8 parts, broken stone (or gravel) accounts for 92 to 98 parts, basalt fiber specification is fiber yarn, and the dosage of the fiber yarn is 3.2 to 6.0Kg/m 3 (ii) a The preferred fly ash: crushed stone (or gravel) 4: 96. Stirring and mixing the fiber yarns, the broken stones or the gravel and the fly ash, uniformly mixing cement accounting for 3.0-4.0 percent of the total material mass ratio, curing for 5-10 days, preferably 7 days, implementing pressure construction with unconfined compressive strength of 2.5-4.0 MPa, and simultaneously rolling and forming at-2-33 ℃.
The utility model discloses bituminous paving thickness among the ultra-thin bituminous paving of high-grade highway confirms according to the highway grade, and highway is 60 mm-119 mm, one-level highway 60 mm-99 mm.
As shown in fig. 1, an ultra-thin asphalt pavement for a high-grade highway is provided, which comprises an ultra-thin asphalt surface layer, a bonding layer, a brittle fracture resistant and shrinkage resistant semi-rigid base layer, an underlayer and a soil foundation, wherein the ultra-thin asphalt surface layer, the bonding layer, the brittle fracture resistant and shrinkage resistant semi-rigid base layer, the underlayer and the soil foundation are arranged from top to bottom, the ultra-thin asphalt surface layer is paved on the brittle fracture resistant and shrinkage resistant semi-rigid base layer, and the ultra-thin asphalt surface layer and the brittle fracture resistant and shrinkage resistant semi-rigid base layer are combined through the bonding layer; the ultrathin asphalt surface layer is 60-119 mm thick, the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer is made of anti-brittle-cracking and anti-shrinkage-cracking cement stabilized macadam, the asphalt surface layer and the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer made of the anti-brittle-cracking and anti-shrinkage-cracking cement stabilized macadam are bonded together through a bonding layer, and the base layer is made of lime or cement or two-ash stabilized powder or aggregate with the thickness larger than 160 mm.
As shown in fig. 2, the ultra-thin asphalt pavement for the high-grade highway comprises an ultra-thin asphalt surface layer, a bonding layer, a brittle fracture resistant and shrinkage resistant semi-rigid base layer, an underlayer and a soil foundation, wherein the ultra-thin asphalt surface layer, the bonding layer, the brittle fracture resistant and shrinkage resistant semi-rigid base layer, the underlayer and the soil foundation are arranged from top to bottom, the ultra-thin asphalt surface layer is paved on the brittle fracture resistant and shrinkage resistant semi-rigid base layer, and the ultra-thin asphalt surface layer and the brittle fracture resistant and shrinkage resistant semi-rigid base layer are combined through the bonding layer; the thickness of the ultrathin asphalt surface layer is 60 mm-119 mm, the brittle fracture and shrinkage resistant semi-rigid base layer is made of brittle fracture and shrinkage resistant basalt fiber cement stabilized macadam, the asphalt surface layer and the brittle fracture and shrinkage resistant semi-rigid base layer made of brittle fracture and shrinkage resistant basalt fiber cement stabilized macadam are bonded together through a bonding layer, and the base layer is made of lime or cement or two-lime stabilized powder or aggregate with the thickness larger than 160 mm.
As shown in fig. 3, an ultra-thin asphalt pavement for a highway is provided, which is similar to the structure of the ultra-thin asphalt pavement for a highway shown in fig. 1 and uses substantially the same materials, and is different from the ultra-thin asphalt pavement for a highway shown in fig. 1 in that a brittle fracture-resistant and shrinkage-resistant semi-rigid base layer uses brittle fracture-resistant and shrinkage-resistant lime stabilized macadam.
As shown in fig. 4, the present invention provides an ultra-thin asphalt pavement for a high-grade highway, which is similar to the ultra-thin asphalt pavement for a high-grade highway shown in fig. 1 in structure and uses substantially the same materials, and is different from the ultra-thin asphalt pavement for a high-grade highway shown in fig. 1 in that a brittle fracture and crack resistant semi-rigid base layer uses brittle fracture and crack resistant basalt fiber lime stabilized macadam.
As shown in fig. 5, the super thin asphalt pavement for a highway is similar to the super thin asphalt pavement for a highway shown in fig. 1 in structure and basically uses the same materials, and is different from the super thin asphalt pavement for a highway shown in fig. 1 in that the brittle fracture resistant and shrinkage crack resistant semi-rigid base layer uses the brittle fracture resistant and shrinkage crack resistant fly ash cement stabilized macadam.
As shown in fig. 6, a high-grade highway ultrathin asphalt pavement suitable for an expressway is provided, which is similar in structure and basically identical in material used to the high-grade highway ultrathin asphalt pavement shown in fig. 1, and is different from the high-grade highway ultrathin asphalt pavement shown in fig. 1 in that a brittle fracture-resistant and shrinkage-resistant semi-rigid base layer uses brittle fracture-resistant and shrinkage-resistant basalt fiber fly ash cement stabilized macadam.
As shown in fig. 7, an ultra-thin asphalt pavement for a high-grade road suitable for a first-grade road is provided, which includes an ultra-thin asphalt surface layer, a bonding layer, a brittle fracture resistant, shrinkage resistant, semi-rigid base layer, an underlayer, and a soil foundation, wherein the ultra-thin asphalt surface layer, the bonding layer, the brittle fracture resistant, shrinkage resistant, semi-rigid base layer, the underlayer, and the soil foundation are arranged from top to bottom, the ultra-thin asphalt surface layer is laid on the brittle fracture resistant, shrinkage resistant, semi-rigid base layer, and the ultra-thin asphalt surface layer and the brittle fracture resistant, shrinkage resistant, semi-rigid base layer are combined through the bonding layer; the ultrathin asphalt surface layer is 60-99 mm thick, the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer is made of anti-brittle-cracking and anti-shrinkage-cracking cement stabilized macadam, the asphalt surface layer and the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer made of the anti-brittle-cracking and anti-shrinkage-cracking cement stabilized macadam are bonded together through a bonding layer, and lime or cement or lime or aggregate with the thickness larger than 160mm or lime and lime stabilized powder or aggregate is used as the base layer.
As shown in fig. 8, an ultra-thin asphalt pavement for a first-class highway is provided, which has a similar structure to that of the ultra-thin asphalt pavement for a first-class highway shown in fig. 7 and uses substantially the same materials, and is different from the ultra-thin asphalt pavement for a first-class highway shown in fig. 7 in that a brittle fracture-resistant and shrinkage-resistant semi-rigid base layer uses brittle fracture-resistant and shrinkage-resistant basalt fiber cement-stabilized macadam.
As shown in fig. 9, the present invention provides an ultra-thin asphalt pavement for a first-class road, which is similar to the structure of the ultra-thin asphalt pavement for a first-class road shown in fig. 7 and is made of substantially the same material, and is different from the ultra-thin asphalt pavement for a first-class road shown in fig. 7 in that the brittle fracture resistant and shrinkage crack resistant semi-rigid base layer uses the brittle fracture resistant and shrinkage crack resistant lime stabilized macadam.
As shown in fig. 10, an ultra-thin asphalt pavement for a first-class highway is provided, which has a similar structure to that of the ultra-thin asphalt pavement for a first-class highway shown in fig. 7 and uses substantially the same materials, and is different from the ultra-thin asphalt pavement for a first-class highway shown in fig. 7 in that a brittle fracture-resistant and shrinkage-resistant semi-rigid base layer uses brittle fracture-resistant and shrinkage-resistant basalt fiber lime stabilized macadam.
As shown in fig. 11, an ultra-thin asphalt pavement for a first-class highway is proposed, which has a similar structure to that of the ultra-thin asphalt pavement for a first-class highway shown in fig. 7 and uses substantially the same materials, and is different from the ultra-thin asphalt pavement for a first-class highway shown in fig. 7 in that a brittle fracture-resistant and shrinkage-resistant semi-rigid base layer uses brittle fracture-resistant and shrinkage-resistant fly ash cement stabilized macadam.
As shown in fig. 12, an ultra-thin asphalt pavement for a first-class highway is provided, which has a similar structure and uses substantially the same materials as those of the ultra-thin asphalt pavement for a first-class highway shown in fig. 7, and is different from the ultra-thin asphalt pavement for a first-class highway shown in fig. 7 in that a brittle fracture-resistant and shrinkage-resistant basalt fiber fly ash cement stabilized macadam is used as a brittle fracture-resistant and shrinkage-resistant semi-rigid base layer.
Adopt the utility model discloses highway and one-level highway of the ultra-thin bituminous paving of high-grade highway have thoroughly eliminate the bend and draw fatigue failure and rut disease, reduce or eliminate the superiority of bituminous surface layer self temperature crack disease to and build advantage such as with low costs, maintenance cost low, improved economic benefits greatly.
Can definitely learn through the experiment, adopt the utility model discloses the highway and the one-level highway of the ultra-thin bituminous paving of high-grade highway compare in prior art's advantage. The finite element method is used for calculation, and the result shows that the track depth of the existing asphalt pavement is increased along with the increase of the thickness of the asphalt pavement, and the track depth is shown in a table 3:
meter 3375 statistics of rut depths at different surface thicknesses under ten thousand traffic loads
| Thickness of surface layer (mm) | Wheel displacement (mm) | Wheel side displacement (mm) | Rut depth (mm) |
| 3 | -0.12 | 0.05 | 0.16 |
| 5 | -0.13 | 0.08 | 0.27 |
| 8 | -0.31 | 0.13 | 0.44 |
| 10 | -0.38 | 0.16 | 0.55 |
| 30 | -1.15 | 0.49 | 1.64 |
| 50 | -1.92 | 0.82 | 2.74 |
| 100 | -3.84 | 1.63 | 5.47 |
| 150 | -7.50 | 2.21 | 9.71 |
| 200 | -10.92 | 2.64 | 13.56 |
| 250 | -14.41 | 2.96 | 17.37 |
| 300 | -17.52 | 3.23 | 20.75 |
The experimental road detection result proves that the horizontal plastic deformation of the upper surface and the lower surface of the asphalt surface layer is limited due to the friction force of the automobile tire and the adhesive force and the friction force of the bottom layer, and the rutting can not occur when the thickness of the asphalt surface layer is not more than 50 mm.
To adopting the utility model discloses the highway and the one-level highway on the ultra-thin bituminous paving of high-grade highway, experimental data sees table 4:
TABLE 4 calculation of temperature gradient stress
Note: 1. the coefficient of linear expansion is described in "engineering materials", master catalog of Changan university, people's traffic press.
2. The temperature gradient is referred to JTG D40-2002 road cement pavement design Specification.
3. The elastic modulus is referred to JTG D50-2006 Standard for design of road asphalt pavement.
From the above table 4, it can be seen that the surface temperature stress of the asphalt pavement increases with the thickness thereof, and the thinner the asphalt pavement layer is, the smaller the surface temperature stress is, and the less the possibility of occurrence of cracks is.
The utility model discloses pitch surface course thickness among the ultra-thin bituminous paving of high-grade highway is the minimum thickness confirmed by bleeding (the coefficient of permeability is not more than 30mml/min), roughness (accord with the ministry of ministry standard requirement), texture degree of depth (accord with the ministry of ministry standard requirement). The ministry promulgates standard is 'design Specification for road asphalt pavement' JTG D50-2006 clause.
The utility model discloses ultra-thin bituminous paving of high-grade highway is through reducing pitch surface course thickness and the anti semi-rigid basic unit that splits that contracts of anti brittle fracture bonds, makes the pitch surface course guarantee to be in the sectional compression area of road surface structure bending resistance, does not produce the bending stress to eliminate the bending fatigue failure that draws.
The test result of the experimental road shows that when the thickness of the asphalt surface layer is 30mm, each index exceeds the ministry-issued second-level road standard; when the thickness of the asphalt surface layer is 40mm, all indexes exceed the ministry-issued highway standard.
The test result of an experimental road shows that the bonding strength of the brittle-fracture-resistant and shrinkage-fracture-resistant semi-rigid base layer reaches 0.8MPa to 1.1MPa, the actual layer bottom shear stress is only 0.1MPa to 0.3MPa, and the situation that a push disease cannot occur is guaranteed.
The utility model discloses binder that the tie coat used during the ultra-thin bituminous paving of high grade highway was experimental with the utility model discloses the binder that adopts in the ultra-thin bituminous paving of high grade highway embodiment is the same, and preferred AH70#, AH90# pitch or SBS modified asphalt or sulphur modified asphalt with, can guarantee or be higher than foretell technological effect.
Detailed description of the preferred embodiment 1
Experimental construction on K11+ 000-K14 +000 ascending road sections of a high-speed road on which an chen is located, wherein the thickness of an asphalt surface layer is 90 mm; simultaneously using a bonding layer; meanwhile, the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer is stabilized by anti-brittle-cracking and anti-shrinkage-cracking cement; meanwhile, the whole layer compaction thickness of the anti-brittle fracture and anti-shrinkage crack cement stabilized macadam is more than or equal to 300 mm; meanwhile, the cement dosage is 3.0-4.0% (accounting for the total mass ratio), and the unconfined compressive strength is 2.5-4.0 MPa in 7 days; simultaneously rolling and forming at the air temperature of 20-30 ℃, preferably at the temperature of 25 ℃; meanwhile, the thickness of the subbase layer is more than 360 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
Specific example 2
K11+ 000-K14 +000 descending road on high-speed road by virtue of chenAnd (5) carrying out experimental construction. The thickness of the asphalt surface layer is 90 mm; simultaneously using a bonding layer; simultaneously, the brittle fracture resistant and shrinkage crack resistant semi-rigid base layer uses the brittle fracture resistant and shrinkage crack resistant basalt fiber cement stabilized macadam; simultaneously, the whole layer compaction thickness of the brittle fracture and shrink crack resistant basalt fiber cement stabilized macadam is more than or equal to 280 mm; at the same time, the dosage of basalt fiber is 3.2 Kg-6.0 Kg/m 3 (ii) a Meanwhile, the cement dosage is 3.0-4.0% (accounting for the total mass ratio), and the unconfined compressive strength is 2.5-4.0 MPa in 7 days; simultaneously rolling and forming at the air temperature of 20-30 ℃, preferably at the temperature of 25 ℃; meanwhile, the thickness of the subbase layer is more than or equal to 360 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
Specific example 3
Experimental construction on K14+ 000-K17 +000 ascending road sections of a high-speed road on which an chen is located, wherein the thickness of an asphalt surface layer is 100 mm; simultaneously using a bonding layer; meanwhile, the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer uses anti-brittle-cracking and anti-shrinkage-cracking lime stabilized macadam; meanwhile, the whole layer compaction thickness of the brittle fracture and shrinkage resistant lime stabilized macadam is more than or equal to 280 mm; meanwhile, slaked lime, pulverized fuel ash and broken stone are 7:13: 80; simultaneously rolling and forming at the air temperature of 20-30 ℃, preferably at the temperature of 25 ℃; meanwhile, the thickness of the subbase layer is more than or equal to 360 mm; mineral composition the mineral composition in table 2 was used for mineral composition.
Specific example 4
Experimental construction on K14+ 000-K17 +000 descending road sections of the high-speed road close to the chen. The thickness of the asphalt surface layer is 60 mm-119 mm; simultaneously using a bonding layer; meanwhile, the brittle fracture resistant and shrinkage fracture resistant semi-rigid base layer is made of basalt fiber second ash stabilized macadam; meanwhile, the whole layer compaction thickness of the basalt fiber second ash stabilized macadam is more than or equal to 300 mm; at the same time, the dosage of the basalt fiber is 3.2 Kg-6.0 Kg/m 3 (ii) a Meanwhile, proportioning the lime-fly ash crushed stones: slaked lime, pulverized coal ash and broken stone in a ratio of 7:13:80, and simultaneously rolling and forming at the temperature of 20-30 ℃, preferably at the temperature of 25 ℃; meanwhile, the thickness of the subbase layer is more than or equal to 360 mm; mineral composition the mineral composition in table 2 was used for mineral composition.
Specific example 5
Experimental construction of the high-speed road K17+ 000-K20 +000 ascending road sections. The thickness of the asphalt surface layer is 80 mm; simultaneously using a bonding layer; meanwhile, the brittle fracture and shrinkage fracture resistant semi-rigid base layer is stabilized by fly ash cement; meanwhile, the whole layer of the fly ash cement stabilized macadam is compacted to be 280mm in thickness; simultaneously, fly ash: crushed stone is 4: 96; meanwhile, the cement consumption is 3.0-4.0% (accounting for the total mass ratio), and the unconfined compressive strength is 2.5 MPa-4.0 MP in 7 days; simultaneously, rolling and forming at the air temperature of 20-30 ℃, preferably at the temperature of 25 ℃; meanwhile, the thickness of the subbase layer is more than or equal to 360 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
Specific example 6
Experimental construction of the high-speed road K17+ 000-K20 +000 descending road sections. The thickness of the green surface layer is 80 mm; simultaneously using a bonding layer; meanwhile, the brittle fracture and shrinkage fracture resistant semi-rigid base layer is made of basalt fiber fly ash cement stabilized macadam; meanwhile, the whole layer of the basalt fiber fly ash cement stabilized macadam is compacted to be 260mm in thickness; meanwhile, the pulverized fuel ash and the broken stone are 4: 96; at the same time, the dosage of basalt fiber is 3.2 Kg-6.0 Kg/m 3 (ii) a Meanwhile, the cement consumption is 3.0-4.0% (accounting for the total mass ratio), the 7-day unconfined compressive strength is 2.5-4.0 MPa, and the cement is rolled and molded at the temperature of 20-30 ℃, preferably at the temperature of 25 ℃; meanwhile, the thickness of the subbase layer is more than or equal to 360 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
Specific example 7
And (3) experimental construction of K385+ 000-K388 +000 ascending road sections of the first-level road of the national road 107 line. The thickness of the asphalt surface layer is 60 mm; simultaneously using a bonding layer; meanwhile, the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer is stabilized by anti-brittle-cracking and anti-shrinkage-cracking cement; meanwhile, the whole layer of the anti-brittle fracture and anti-shrinkage crack cement stabilized macadam is compacted to a thickness of 300 mm; meanwhile, the cement dosage is 3.0-4.0% (accounting for the total mass ratio), and the unconfined compressive strength is 2.5-4.0 MPa in 7 days; simultaneously, rolling and forming at the air temperature of 0-8 ℃, preferably-1 ℃; meanwhile, the thickness of the lime soil of the subbase layer is more than or equal to 180 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
Specific example 8
107 lines of national road, first-level road K385+ 000-And (5) carrying out K388+000 downlink road section experimental construction. The thickness of the asphalt surface layer is 60 mm; simultaneously using a bonding layer; meanwhile, the brittle fracture resistant and shrinkage crack resistant semi-rigid base layer is stabilized by using brittle fracture resistant and shrinkage crack resistant basalt fiber cement macadam; meanwhile, the whole layer of the brittle-fracture-resistant and shrinkage-resistant basalt fiber cement stabilized macadam is compacted to be 280mm in thickness; at the same time, the dosage of the basalt fiber is 3.2 Kg-6.0 Kg/m 3 (ii) a Meanwhile, the cement dosage is 3.0-4.0% (accounting for the total mass ratio), and the unconfined compressive strength is 2.5-4.0 MPa in 7 days; rolling at 0-8 deg.C, preferably-2 deg.C; the thickness of the lime soil of the subbase layer is more than or equal to 180 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
Specific example 9
And (3) experimental construction of K388+ 000-K391 +000 ascending sections of the 107-level highway of the national road. The thickness of the asphalt surface layer is 60 mm; simultaneously using a bonding layer; meanwhile, the anti-brittle-cracking and anti-shrinkage-cracking semi-rigid base layer uses anti-brittle-cracking and anti-shrinkage-cracking lime stabilized macadam; meanwhile, the whole layer of the brittle fracture and shrinkage fracture resistant second-ash stabilized macadam is compacted to a thickness of 280 mm; meanwhile, slaked lime, pulverized fuel ash and broken stone are 7:13: 80; rolling at 0-8 deg.C, preferably-2 deg.C; the thickness of the lime soil of the subbase layer is more than or equal to 180 mm; mineral composition the mineral composition in table 2 was used for mineral composition.
Detailed description of example 10
The experimental construction of K388+ 000-K391 +000 descending road sections of 107-level roads of the national road has the thickness of an asphalt surface layer of 60 mm; simultaneously using a bonding layer; meanwhile, the brittle fracture resistant and shrinkage fracture resistant semi-rigid base layer is made of basalt fiber second ash stabilized macadam; meanwhile, compacting the whole layer of basalt fiber second ash stabilized macadam to a thickness of 260 mm; at the same time, the dosage of the basalt fiber is 3.2 Kg-6.0 Kg/m 3 (ii) a Simultaneously, proportioning two-ash crushed stones: slaked lime, pulverized coal ash and broken stone of 7:13:80, and is formed by rolling and molding at the temperature of 0 to 8 ℃ below zero, preferably at the temperature of 2 ℃ below zero; the thickness of the lime soil of the subbase layer is more than or equal to 180 mm; mineral composition the mineral composition in table 2 was used for mineral composition.
Specific example 11
Experiment construction of K391+ 000-K394 +000 ascending sections of the 107-level highway of the national road. The thickness of the asphalt surface layer is 60 mm; simultaneously using a bonding layer; meanwhile, the brittle fracture and shrinkage fracture resistant semi-rigid base layer is stabilized by fly ash cement; meanwhile, the whole layer of the fly ash cement stabilized macadam is compacted to be 280mm in thickness; meanwhile, the pulverized fuel ash and the broken stone are 4: 96; meanwhile, the cement consumption is 3.0-4.0% (accounting for the total mass ratio), and the unconfined compressive strength is 2.5 MPa-4.0 MP in 7 days; simultaneously, rolling and forming at the air temperature of-2 ℃ to 33 ℃, preferably 12 ℃; meanwhile, the thickness of the bottom layer lime soil is more than or equal to 180 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
EXAMPLE 12
And (3) experimental construction of descending sections of first-level roads K391+ 000-K394 +000 of the national road 107. The thickness of the asphalt surface layer is 60 mm; simultaneously using a bonding layer; meanwhile, the brittle fracture resistant and shrinkage fracture resistant semi-rigid base layer is formed by stabilizing crushed stone with basalt fiber fly ash cement; meanwhile, the whole layer of the basalt fiber fly ash cement stabilized macadam is compacted to be 260mm in thickness; meanwhile, the pulverized fuel ash and the broken stone are 4: 96; at the same time, the dosage of the basalt fiber is 3.2 Kg-6.0 Kg/m 3 (ii) a Meanwhile, the cement consumption is 3.0-4.0% (accounting for the total mass ratio), the unconfined compressive strength is 2.5-4.0 MPa in 7 days, and the cement is rolled and molded at the temperature of-2-33 ℃, preferably at the temperature of 12 ℃; thickness of lime soil of subbase layer>180 mm; mineral composition the mineral composition in table 1 was used for mineral composition.
It is further explained that, as is well known, the design method of the asphalt pavement in China determines the design service life of the pavement according to the principle that the structural layer is subjected to fatigue damage under the repeated action of vehicle load on the basis of the theory of the elastic layered system of the pavement, namely, the durability design; through a great deal of investigation and research on the use status of asphalt pavements, the early-stage damage of most of asphalt pavements which generally do not reach the design service life is found, and the main damage forms are ruts and reflection cracks. Rutting is caused by the fact that the asphalt surface layer is too thick to fully exert the effect of flow restriction. The reflection cracks are cracks of the semi-rigid base layer reflected to the asphalt surface layer, and the pavement is damaged due to water leakage. The cracks in the semi-rigid substrate include fracture fatigue crack, shrinkage crack and brittle fatigue crack (brittle crack), and the most important cause is brittle crack and shrinkage crack (shrinkage crack) of the semi-rigid substrate.
The utility model provides a brittle fracture-resistant shrinkage-resistant semi-rigid base layer used in the high-grade highway ultrathin asphalt pavement, which can eliminate brittle fatigue cracks (brittle fractures) and shrinkage cracks; when the thickness of the semi-rigid base layer meets the brittle fracture resistance requirement, the fracture fatigue resistance requirement is met, and fracture fatigue resistance cracks are avoided. The utility model provides an anti brittle fracture is anti to contract and is split semi-rigid basic unit has solved the brittle fracture and the shrinkage crack (shrinkage crack) technical problem of the semi-rigid basic unit that exists among the prior art well.
The utility model provides a brittle fatigue (brittle failure) to the semi-rigid basic unit among the prior art, the utility model provides a high-grade highway ultra-thin bituminous paving has very obvious technical advantage.
In addition, the utility model provides a high-grade highway ultra-thin asphalt pavement can use ultra-thin asphalt pavement under the condition of not using modified asphalt, not adding anti-rutting agent, full play current-limiting effect's effect, eliminate the rut disease; the utility model discloses an anti brittle rupture of anti shrinkage is anti brittle rupture semi-rigid basic unit can eliminate brittle fatigue crack (brittle rupture) of semi-rigid basic unit, temperature shrinkage, dry shrinkage crack and anti fatigue crack of rolling over to eliminate the early destruction phenomenon that plays of bituminous paving, build long-life bituminous paving, can also reduce construction cost by a wide margin.
The utility model provides an ultra-thin bituminous paving of high-grade highway compares in prior art, the utility model discloses an ultra-thin bituminous paving of high-grade highway has very obvious self technical advantage, specifically as follows:
1. the thinner asphalt surface layer is bonded with the brittle fracture and shrinkage crack resistant semi-rigid base layer through the bonding layer, so that the asphalt surface layer is positioned in a compression area of the bending-resistant section of the pavement structure, no bending tensile stress exists, and the bending tensile fatigue damage of the asphalt surface layer is completely eliminated; the ultrathin asphalt layer can fully play the current limiting effect of the asphalt pavement and thoroughly eliminate track diseases; reducing or eliminating pavement temperature gradient cracks.
2. The construction cost and the maintenance cost of the pavement are greatly reduced, the economic benefit is greatly improved, and the development strategy of low-carbon economy is met.
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The ultrathin asphalt pavement for the high-grade highway is characterized by being specially used for the highway and the first-grade highway and comprising an ultrathin asphalt surface layer, a bonding layer, a brittle fracture resistant and shrinkage resistant semi-rigid base layer, a subbase layer and a soil base, wherein the ultrathin asphalt surface layer, the bonding layer, the brittle fracture resistant and shrinkage resistant semi-rigid base layer, the subbase layer and the soil base are arranged from top to bottom;
the ultrathin asphalt pavement for the high-grade highway has the ultrathin asphalt surface course thickness of 60-119 mm and the ultrathin asphalt surface course thickness of 60-99 mm.
2. The ultra-thin high-grade road asphalt pavement of claim 1, wherein the brittle fracture resistant and cracking resistant semi-rigid base course comprises any one of brittle fracture resistant and cracking resistant cement stabilized macadam, brittle fracture resistant and cracking resistant basalt fiber cement stabilized macadam, brittle fracture resistant and cracking resistant second ash stabilized macadam, brittle fracture resistant and cracking resistant basalt fiber second ash stabilized macadam, brittle fracture resistant and cracking resistant fly ash cement stabilized macadam, or brittle fracture resistant basalt fiber fly ash cement stabilized macadam.
3. A high-grade ultrathin asphalt pavement for roads as claimed in claim 2, wherein the compacted thickness of the whole brittle-fracture-resistant and compressive-fracture-resistant semi-rigid base layer is greater than or equal to 300mm in a brittle-fracture-resistant and compressive-fracture-resistant semi-rigid base layer using brittle-fracture-resistant and compressive-fracture-resistant cement-stabilized macadam as a main material.
4. A high grade highway ultrathin asphalt pavement according to claim 2, characterized in that the crushed stone comprises basalt fiber in a brittle fracture resistant and shrinkage resistant semi-rigid base course using brittle fracture resistant and shrinkage resistant basalt fiber two-ash stabilized crushed stone as a main material.
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