CN111749068B - Application method of deoiled rock debris for asphalt concrete road surface layer - Google Patents
Application method of deoiled rock debris for asphalt concrete road surface layer Download PDFInfo
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- CN111749068B CN111749068B CN202010587559.4A CN202010587559A CN111749068B CN 111749068 B CN111749068 B CN 111749068B CN 202010587559 A CN202010587559 A CN 202010587559A CN 111749068 B CN111749068 B CN 111749068B
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- asphalt concrete
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- 239000011435 rock Substances 0.000 title claims abstract description 98
- 239000002344 surface layer Substances 0.000 title claims abstract description 69
- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000010426 asphalt Substances 0.000 claims abstract description 104
- 239000000203 mixture Substances 0.000 claims abstract description 85
- 239000004575 stone Substances 0.000 claims abstract description 70
- 238000002156 mixing Methods 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 42
- 239000004568 cement Substances 0.000 claims abstract description 37
- 239000010410 layer Substances 0.000 claims abstract description 31
- 238000003825 pressing Methods 0.000 claims description 23
- 238000005056 compaction Methods 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 21
- 238000010276 construction Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012634 fragment Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 11
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 31
- 238000002386 leaching Methods 0.000 description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 description 11
- 239000011707 mineral Substances 0.000 description 11
- 230000007613 environmental effect Effects 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- 239000004576 sand Substances 0.000 description 10
- 238000013461 design Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- 230000001988 toxicity Effects 0.000 description 6
- 231100000419 toxicity Toxicity 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000003209 petroleum derivative Substances 0.000 description 5
- 238000003892 spreading Methods 0.000 description 5
- 230000007480 spreading Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 239000003079 shale oil Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004058 oil shale Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 231100000820 toxicity test Toxicity 0.000 description 2
- 229920000715 Mucilage Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000002076 thermal analysis method Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
- C04B18/125—Slate residues, e.g. colliery shale or oil shale or oil shale ash
-
- 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
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4806—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely rollers for consolidating or finishing
- E01C19/4826—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely rollers for consolidating or finishing the materials being aggregate mixed with binders
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/20—Binder incorporated in cold state, e.g. natural asphalt
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses an application method of deoiled rock debris for an asphalt concrete road surface layer, and relates to the technical field of resource utilization of oil-based rock debris. The proportion of the surface layer material is specifically that, by mass ratio, the mixing amount of broken stone below 5mm is 30-35%, the mixing amount of broken stone below 5-10mm is 25-34%, the mixing amount of broken stone below 10-15mm is 26-32%, the mixing amount of broken stone below 15-18mm or 15-20mm is 20-25%, the mixing amount of cement is 2-5%, the mixing amount of deoiled rock debris is 2-6%, and the mixing amount of asphalt is 4-5%. The invention aims at innocent treatment and resource utilization of the deoiled rock debris, and the deoiled rock debris is mixed into the asphalt mixture, so that the application method of applying the deoiled rock debris to the asphalt concrete pavement layer, which can meet the pavement performance requirement of the highway before drilling, solve the problem of environmental pollution, realize source treatment and on-site utilization, is provided.
Description
Technical Field
The invention relates to the technical field of resource utilization of pollutant oil-based rock debris generated in the oil exploitation process, in particular to an application method of deoiled rock debris for an asphalt concrete surface layer.
Background
In the shale oil and gas development process, after the drilling machine vertically downwards reaches the shale layer, the drilling machine can horizontally pass through the shale layer for one or two kilometers to expand the gas production surface. During horizontal travel, the walls of the well tend to collapse, requiring the use of a special drilling fluid, oil-based mud, and thus producing a mixture of oil-based mud, oil, water, and subterranean debris (shale), oil-based debris.
China has abundant oil shale resources, and a large amount of oil-based rock debris can be generated along with the vigorous exploitation of the oil shale resources. According to statistics, in 8 months of 2014, only middle and middle oil Chuanqing drilling company generates 1690m in the Wiyuan and Changning operation area 3 Oil-based cuttings to be treated produced about 12000m in 2014 3 Oil-based cuttings produced about 19370m in 2015 3 Oil-based cuttings. The oil content of the oil-based rock debris is as high as 15% -25%, the oil-based rock debris far exceeds the emission standard, the hazard is huge, and if the oil-based rock debris is not properly treated, the oil-based rock debris can cause serious harm to the ecological environment. With the large-scale exploitation of shale oil and gas resources, the amount of oil-based detritus is also increasing, the oil-based treatment substance is a harmful waste, and if the oil-based detritus is directly discharged without being treated in industrial production, serious environmental pollution is caused, and a series of ecological damage problems are further caused.
With the increasing development of shale gas year by year in China, the safe and efficient treatment of the oil-based detritus becomes one of the important resistances restricting the environmental protection production of petroleum enterprises, and the problem of properly solving the resource treatment of the oil-based detritus becomes urgent. The currently explored oil-based rock debris treatment method in China mainly comprises an incineration method, a microbial degradation method, a thermal desorption method, an extraction method and the like. Pyrolysis is used more often in the southwest region. The pyrolysis method can recover oil substances such as diesel oil, white oil and the like in the rock debris, reduces the oil content of residues, and has certain disadvantages, namely large investment in thermal analysis technology equipment and deodorization treatment on desorbed oil, and because the weighting agent is used in the drilling fluid, the over-standard phenomenon of five elements such as zinc, barium, nickel, lead, cadmium and the like, particularly barium and lead, is obvious in the over-standard phenomenon, which is evaluated by the soil environmental quality standard (GB 15618 plus 1995), exists in the oil-based rock debris, so that the utilization way of harmless waste residues after the oil-based rock debris treatment in the southwest region is limited.
The national intellectual property office in 2019, 6.7 discloses an invention patent with the publication number of CN109853312A and the name of 'an application method of processed oil-based detritus for inorganic stable road base layer', and the invention patent discloses an application method of processed oil-based detritus for inorganic stable road base layer, which is characterized by comprising the following steps: (1) treating the oil-based rock debris by adopting a waste oil-based mud rock debris resource recovery technology LRET and a thermal desorption technology, and detecting each treated environmental index to be qualified for later use; (2) before the base layer is constructed, the subbase layer is inspected, and pumice and sundries are removed; (3) according to the mass ratio, the mixture is mixed according to the mixing amount of 52% of gravel, 12% of sand, 3-5% of cement and 31-33% of oil-based detritus; (4) and filling the mixture on the subbase layer in a layering way, and compacting in a layering way to finally form the road base layer. The method can not only treat the oil-based detritus in a harmless and recycling manner, but also be used as an admixture of a road base layer, meets the strength requirement of the road base layer, can effectively reduce the cement consumption required in road construction, and reduces the construction cost.
In the prior art, the mineral powder is replaced by the oil-based detritus, so that the oil-based detritus can be subjected to harmless and resource treatment and can be used as an admixture of a road base layer, the cement consumption required in road construction is reduced, and the construction cost is reduced. In order to further improve the resource utilization rate of the oil-based rock debris, the oil-based rock debris can be considered to be applied to the asphalt concrete pavement. However, the deoiled rock debris contains a small amount of petroleum substances, has low strength and poor mechanical property, and when the deoiled rock debris is directly applied to the asphalt mixture of the asphalt concrete surface layer, the mechanical property of the asphalt mixture can be influenced, so that the engineering quality is influenced. Therefore, the research on the deoiled rock debris harmless and recycling treatment technology is developed, the deoiled rock debris is applied to the road surface layer admixture, a technical scheme and a construction process which are feasible, economical and reasonable and are used for applying the deoiled rock debris to the road surface layer are formed, the recycling application of the deoiled rock debris is further promoted, the coordinated development of the oil-gas exploration and development main business and the environmental protection is promoted, and the method has very important significance for the development of the whole oil industry and the highway construction industry.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides an application method of deoiled rock debris for an asphalt concrete pavement layer, which aims at harmless treatment and resource utilization of the deoiled rock debris and mixes the deoiled rock debris into an asphalt mixture, thereby providing an application method of the deoiled rock debris for the asphalt concrete pavement layer, which can meet pavement performance requirements of a road before drilling, solve the problem of environmental pollution and realize source treatment and on-site utilization.
In order to solve the problems in the prior art, the invention is realized by the following technical scheme:
an application method of deoiled rock debris for an asphalt concrete pavement layer comprises the following specific steps:
the material proportion determines the usage of the material according to the proportion of the surface layer material, and the proportion of the surface layer material is specifically as follows by mass ratio:
the upper layer material is proportioned according to the mixing amount of 30-35% of broken stone with the thickness of less than 5mm, 25-34% of broken stone with the thickness of 5-10mm, 26-32% of broken stone with the thickness of 10-15mm, 2-5% of cement, 2-6% of deoiled rock debris and 4-5% of asphalt;
the middle surface layer material is prepared by mixing 20-25% of crushed stone below 5mm, 10-15% of crushed stone below 5-10mm, 26-37% of crushed stone below 10-15mm, 20-25% of crushed stone below 15-18mm, 2-5% of cement, 2-6% of deoiled detritus and 4-5% of asphalt;
the lower surface layer material is prepared according to the mixing amount of 20-25% of broken stone below 5mm, 8-18% of broken stone below 5-10mm, 26-37% of broken stone below 10-15mm, 20-25% of broken stone below 15-20mm, 2-5% of cement, 2-6% of deoiled rock debris and 4-5% of asphalt;
II, the construction method comprises the following steps:
step A, determining the proportion of an asphalt mixture according to a surface layer, calculating the consumption of materials and preparing the materials;
step B, normally drying the crushed stone aggregate in the step A according to the production requirement of the asphalt mixture, wherein the heating temperature of the crushed stone aggregate is 185-200 ℃;
step C, performing normal wet mixing on the dried aggregate, cement, deoiled rock debris and asphalt for 35-45s to form an asphalt mixture, wherein the mixing temperature of the asphalt mixture is 175-190 ℃; the discharging temperature is 170-175 ℃.
Further, the amount of asphalt added in the upper layer was 5%.
Further, the asphalt content in the middle layer was 4.7%.
Further, the amount of asphalt added in the lower layer was 4%.
The thickness of the upper surface layer is 4cm, the thickness of the middle surface layer is 5cm, and the thickness of the lower surface layer is 6 cm.
The paving temperature of the asphalt mixture is 140-150 ℃, the paving coefficient is 1.25, and the paving speed is 3-4 m/min.
The asphalt mixture is paved and leveled, and after irregular surfaces are trimmed, the asphalt mixture is uniformly compacted, wherein the compaction is carried out in three stages, namely initial compaction, secondary compaction and final compaction;
the initial pressing is carried out at the temperature of 130-140 ℃ of the asphalt mixture, and a double-steel-wheel vibratory roller is adopted for rolling;
the re-pressing is carried out immediately after the initial pressing, a central tyre roller is adopted, and the rolling times are 4-6 times until no obvious wheel track exists stably;
and the final pressing is carried out immediately after the re-pressing, the re-pressing is carried out at the temperature of the asphalt mixture not lower than 70 ℃, and the rolling is carried out for not less than two times by adopting a steel wheel road roller until no obvious wheel mark exists.
Compared with the prior art, the beneficial technical effects brought by the invention are as follows:
1. according to the invention, the application of the deoiled rock debris in the asphalt concrete road surface layer can effectively reduce the using amount of mineral powder required in road construction and reduce the construction cost.
2. Compared with the traditional treatment methods such as a landfill method, a microbial degradation method, a pyrolysis method and the like, the deoiled rock debris is applied to the asphalt concrete road surface layer, the deoiled rock debris can be treated in a green, efficient and recycling manner, the harmless treatment problem of the deoiled rock debris is effectively solved, and the method has great practical significance on the development engineering of shale oil gas.
3. For the modes of applying the deoiled rock debris to buildings, cement production, MTC cement paste technology, configuration of ternary briquettes and the like, the application of the deoiled rock debris to the asphalt concrete pavement layer is simple in operation process, can be used nearby, reduces transportation, is economical and reasonable, and has higher popularization value and practical value.
4. Compared with the prior art in which the deoiled rock debris is applied to the road base layer, the deoiled rock debris replaces mineral powder, and the mineral powder consumption required in road construction is reduced. According to the invention, the asphalt concrete mixture doped with the deoiled rock debris is modified by taking cement as an additive, the cement adopts conventional cement for road construction, and the cement can play a role in modifying the deoiled rock debris under the action of asphalt mixing temperature of 175-190 ℃, so that the mechanical property of the asphalt concrete mixture is improved.
5. The deoiled detritus contains a small amount of petroleum substances, has low strength and poor mechanical property, and can influence the water stability of the asphalt mixture when being directly applied to the asphalt mixture of the asphalt concrete surface layer.
6. Compared with the prior art, the invention adopts the deoiled rock debris to replace mineral powder, and can also effectively preserve heat of the asphalt mixture, thereby avoiding quick temperature loss of the asphalt mixture. The delivery temperature of the asphalt mixture is required to a certain degree, and the paving temperature is also required to a certain degree, so that the temperature loss of the asphalt mixture is ensured to be within a controllable range in the transportation process.
Description of the materials
The asphalt mixture mixing proportion is obtained through a large number of indoor tests and field test researches, and the test and improvement processes are as follows:
(1) the method comprises the steps of carrying out grading design on mineral aggregate according to a standard, carrying out a batch proportion Marshall test and a road performance test, and determining the batch proportion scheme of the asphalt concrete mixture as shown in tables 1-3, so that the standard volume index and mechanical requirements can be met, and the road performance requirement can be met.
TABLE 1 initial mix ratio of asphalt concrete for road top layer
TABLE 2 initial mix proportion of asphalt concrete for surface layer in road
TABLE 3 initial mix ratio of asphalt concrete for road lower surface
(2) By analyzing the action mechanism of the mineral powder, the deoiled rock debris is known to be alkaline due to large specific surface area, so that the deoiled rock debris can replace the mineral powder to form asphalt mucilage. After mineral powder is completely replaced by the deoiled rock debris, the volume index and the mechanical parameters of the asphalt concrete mixture meet the standard requirements, and a preliminary mixing proportion scheme of the asphalt concrete doped with the deoiled rock debris is obtained.
TABLE 4 initial mix proportion of deoiled rock debris doped asphalt concrete for road surface layer
TABLE 5 initial mix proportion of asphalt concrete with deoiled rock debris mixed in surface layer of road
TABLE 6 initial mix proportion of asphalt concrete mixed with deoiled rock debris on lower surface layer of road
3) The road performance research is carried out on the asphalt concrete mixture with different mixing amounts of the deoiled rock fragments to replace the mineral powder, and the result that the technical requirements on high-temperature stability and low-temperature crack resistance of asphalt concrete can be met when the deoiled rock fragments to replace the mineral powder are applied to the actual engineering of an asphalt pavement, but the water stability of the mixture is improved by carrying out modification research through the additive.
(4) Modifying the asphalt concrete mixture doped with the deoiled rock debris by taking cement as an additive, researching the influence of the cement dosage on the water stability of the asphalt concrete mixture, determining the optimal dosage of the cement to be 2-5%, further developing the optimal design of the mixing proportion, determining the final mixing proportion (see tables 7-9) of the asphalt mixture doped with the deoiled rock debris after the cement modification, and simultaneously carrying out road performance test and environmental impact analysis, wherein the water stability, the high-temperature stability and the low-temperature crack resistance of the asphalt mixture doped with the deoiled rock debris are all in accordance with the standard through the analysis of a soaking Marshall test, a freeze-thaw splitting test, a rutting test and a bending test; the total petroleum hydrocarbon concentration of the leachate obtained by the short-term intensified leaching test and the long-term leaching toxicity test under various simulated environmental conditions is lower than 5mg/L of the national standard. Therefore, the invention meets the road performance requirement and simultaneously reaches the national environmental protection regulations.
TABLE 7 design scheme of final mixing ratio of deoiled rock debris doped asphalt concrete on road surface layer
TABLE 8 design scheme for final mixing ratio of deoiled rock debris doped asphalt concrete of road surface layer
TABLE 9 design scheme for final mixing ratio of deoiled rock debris doped asphalt concrete on road lower surface layer
Detailed Description
The technical solution of the present invention is further elaborated below with reference to specific examples.
Example 1
An application method of deoiled rock debris for an asphalt concrete road surface layer comprises the following specific steps:
the material proportion determines the usage of the material according to the proportion of the surface layer material, and the proportion of the surface layer material is specifically as follows by mass ratio:
the upper layer material is proportioned according to the mixing amount of 30-35 percent of broken stone below 5mm, 25-34 percent of broken stone below 5-10mm, 26-32 percent of broken stone below 10-15mm, 2-5 percent of cement, 2-6 percent of deoiled rock debris and 4 percent of asphalt;
the middle surface layer material is prepared by mixing 20-25% of crushed stone below 5mm, 10-15% of crushed stone below 5-10mm, 26-37% of crushed stone below 10-15mm, 20-25% of crushed stone below 15-18mm, 2-5% of cement, 2-6% of deoiled detritus and 4.7% of asphalt;
the lower surface layer material is proportioned according to the mixing amount of 20-25% of broken stone below 5mm, 8-18% of broken stone below 5-10mm, 26-37% of broken stone below 10-15mm, 20-25% of broken stone below 15-20mm, 2-5% of cement, 2-6% of deoiled rock debris and 5% of asphalt;
II, the construction method comprises the following steps:
step A, determining the proportion of an asphalt mixture according to a surface layer, calculating the consumption of materials and preparing the materials;
step B, normally drying the crushed stone aggregate in the step A according to the production requirement of the asphalt mixture, wherein the heating temperature of the crushed stone aggregate is 185-200 ℃;
step C, normally wet-mixing the dried aggregate with cement, deoiled rock debris and asphalt for 35-45s to form an asphalt mixture, wherein the mixing temperature of the asphalt mixture is 175-190 ℃; the discharging temperature is 170-175 ℃.
Furthermore, the ratio of the mixing amount of the crushed stone with the diameter less than 5mm, the mixing amount of the crushed stone with the diameter of 5-10mm, the mixing amount of the crushed stone with the diameter of 10-15mm, the mixing amount of the cement and the mixing amount of the deoiled rock debris in the upper surface layer is 33:31:28:2:6, and the optimal asphalt dosage is 5.0%.
Furthermore, the mass ratio of the sand with the thickness of 0-5 mm, the broken stone with the thickness of 5-10mm, the broken stone with the thickness of 10-15mm, the broken stone with the thickness of 15-18mm, the cement and the deoiled rock debris is 22:15:35:20:2:6, and the optimal asphalt dosage is 4.7%.
Furthermore, the mass ratio of 0-5 mm of broken stone, 5-10mm of broken stone, 10-15mm of broken stone, 15-20mm of broken stone, cement and deoiled rock debris in the lower surface layer is 22:15:30:25:2:6, and the optimal asphalt dosage is 4%.
The paving temperature of the asphalt mixture is 140-150 ℃, the paving coefficient is 1.25, and the paving speed is 3-4 m/min.
The asphalt mixture is paved and leveled, and after irregular surfaces are trimmed, the asphalt mixture is uniformly compacted, wherein the compaction is carried out in three stages, namely initial compaction, secondary compaction and final compaction; the initial pressing is carried out at the temperature of 130-140 ℃ of the asphalt mixture, and a double-steel-wheel vibratory roller is adopted for rolling; the re-pressing is carried out immediately after the initial pressing, a central tyre roller is adopted, and the rolling times are 4-6 times until no obvious wheel tracks are stable; and the final pressing is carried out immediately after the re-pressing, the re-pressing is carried out at the temperature of the asphalt mixture not lower than 70 ℃, and the rolling is carried out for not less than two times by adopting a steel wheel road roller until no obvious wheel mark exists.
And (3) field test: selecting a construction project site of a Weiyuan shale gas development area block as a test site, paving a test road section for field test, and measuring related physical and mechanical parameters. The test block size was 193 m.times.4.5 m, i.e.the test block area was 868.5m 2 。
The pavement structure is as follows from top to bottom:
surface layer: adopting an upper surface layer of 4cm of asphalt concrete AC-13, a middle surface layer of 5cm of asphalt concrete AC-16 and a lower surface layer of 6cm of asphalt concrete AC-20 (mixed with oil-based rock debris);
a base layer: stabilizing the broken stone by using 20cm of cement;
an underlayer: 18cm grade sand gravel is adopted.
According to the characteristics of field reality and local materials, the mixing proportion of the asphalt concrete AC-13 mixture mixed with the deoiled rock debris on the upper surface layer of the asphalt pavement of the highway before drilling is 0-5 mm sand, 5-10mm broken stone, 10-15mm broken stone, cement and the deoiled rock debris is 33:31:28:2:6 in mass ratio, and the optimal asphalt dosage is 5.0%.
The mixture of the asphalt concrete AC-16 mixed with the deoiled rock debris on the surface layer of the road asphalt pavement before drilling is that the mass ratio of the sand of 0-5 mm, the broken stone of 5-10mm, the broken stone of 10-15mm, the broken stone of 15-18mm, the cement and the deoiled rock debris is 22:15:35:20:2:6, and the optimal asphalt dosage is 4.7%.
The mix proportion of the mixture of the asphalt concrete AC-20 mixed with the deoiled rock debris on the lower surface layer of the asphalt pavement of the highway before drilling is designed to be 22:15:30:25:2:6 of sand with the thickness of 0-5 mm, broken stone with the thickness of 5-10mm, broken stone with the thickness of 10-15mm, broken stone with the thickness of 15-20mm, cement and deoiled rock debris, and the optimal asphalt dosage is 4%.
Determining the material dosage according to the proportion of each layer of the material of the surface layer, and carrying out construction procedures such as on-site mixing, paving, compacting and the like on the material to construct the road surface layer. In field detection, in the aspect of road performance, the compaction degree is used for measuring the field compaction quality, and the deflection value reflects the strength of the road surface bearing capacity. The test detects the compactness by a sand filling method and measures the deflection value of the pavement by a Beckman beam method. And in the aspect of environmental influence, the leaching toxicity of heavy metals and the leaching toxicity of total petroleum hydrocarbons are measured, and the influence on the environment is analyzed and evaluated. The test is carried out by sampling on site, and is subjected to a short-term intensified leaching test and a long-term leaching toxicity test under various simulated environmental conditions.
Test results of field test
Asphalt surface layer rebound deflection test
The method for measuring the rebound deflection by adopting the Beckman beam has the advantages that the test results of the rebound deflection of the asphalt surface layer are shown in the table 10, and the test shows that the representative value of the rebound deflection of the asphalt surface layer is 28.2 multiplied by 10 < -2 > mm and is smaller than the designed deflection by 30 multiplied by 10 < -2 > mm, so that the design requirements are met.
TABLE 10 Baker-Man beam test results for determining rebound deflection of asphalt surface layer
② test of compaction degree of asphalt surface layer
The compaction degree test results of the asphalt surface course are shown in table 11, and the test results show that the compaction degrees of all the layers of the asphalt surface course are greater than 93% of the design requirements, so that the asphalt surface course meets the design requirements.
TABLE 11 test results of measuring compaction degree of asphalt surface layer by core drilling method
Analysis of total petroleum hydrocarbon leaching toxicity
The test results of the leaching experiment of the asphalt surface layer field sample doped with the oil-based detritus are shown in Table 12, and the detection shows that the total petroleum hydrocarbon and COD of the leaching solution are lower than the national standard limit value and do not belong to dangerous waste with leaching toxicity.
TABLE 12 Total Petroleum Hydrocarbon and COD Leaching concentration (mg/L) of asphalt topcoats
Analysis of leaching toxicity of heavy metal
The test results of the leaching experiment of the asphalt surface layer field sample doped with the oil-based detritus are shown in Table 13, and the detection shows that the total petroleum hydrocarbon and COD of the leaching solution are lower than the national standard limit value and do not belong to dangerous waste with leaching toxicity.
Table 13 heavy metal leaching concentration of asphalt surface course
And (4) conclusion: the deoiled rock debris is mixed into the pavement mixture and is used in the asphalt concrete pavement layer, and the on-site test detection shows that the pavement performance requirement of the asphalt concrete pavement can be met and the national environmental protection standard is met.
Example 3
The mixing proportion of the asphalt concrete AC-13 mixture doped with the deoiled rock debris on the upper surface layer of the asphalt concrete pavement is 0-5 mm sand, 5-10mm broken stone, 10-15mm broken stone, cement and the deoiled rock debris is 34:30:28:2:6 in mass ratio, and the optimal asphalt dosage is 5.0%; the mixture of the asphalt concrete AC-16 mixed with the deoiled rock debris on the surface layer of the pavement is prepared from 0-5 mm sand, 5-10mm broken stone, 10-15mm broken stone, 15-18mm broken stone, cement and the deoiled rock debris in a mass ratio of 24:17:35:20:2:6, and the optimal asphalt dosage is 4.7%; the mixing proportion of the asphalt concrete AC-20 mixture doped with the deoiled rock debris on the lower surface layer of the pavement is designed to be 24:17:30:25:2:6 of sand of 0-5 mm, broken stone of 5-10mm, broken stone of 10-15mm, broken stone of 15-20mm, cement and deoiled rock debris, and the optimal asphalt dosage is 4%.
The material dosage is determined according to the proportion of each layer of the material of the surface layer, and the road surface layer is built by performing construction procedures such as mixing, transportation, paving, compaction and the like on the material.
(1) Mixing of mixtures
The aggregate is normally dried according to the production requirement of the asphalt mixture, and the heating temperature of the aggregate is 185-200 ℃; mixing the dried aggregate with cement, deoiled rock debris and asphalt normally for 35-45s in a wet manner; the mixing temperature of the asphalt mixture is 175-190 ℃; the discharging temperature is 170-175 ℃. The asphalt has stable temperature and enough fluidity, ensures that the asphalt mixture is uniformly mixed, and the delivery temperature meets the requirements. The mixture is fully mixed until all aggregate particles are completely and uniformly coated by the asphalt, and the asphalt mixture mixed by the mixing station is uniform and consistent without agglomeration or serious segregation.
(2) Transportation of asphalt mixtures
A large-scale dump truck is adopted to convey the asphalt mixture to a paving site, so that the condition that the truck is frequently changed for a short time before the paver to unload the asphalt mixture is reduced. The number of the transport dump trucks is more than the mixing capacity and the paving speed, so that the asphalt mixture of a mixing mechanism can be timely conveyed to a paving site, and the paver continuously, uniformly and uninterruptedly paves the asphalt mixture.
TABLE 14 temp. loss comparison table in transportation process
(3) Paving of asphalt mixtures
A crawler-type paver is adopted, and each paver is provided with two sets of balance beams with the length not less than 16m and two sets of automatic skids. Before the spreading machine starts to produce the material, a small amount of diesel oil for preventing the material from being stuck is coated in the hopper. After the paver preheats the screed plate, the material transporting vehicle slowly backs to the front of the paver and cannot impact the paver. During the unloading process, the material transporting vehicle is in neutral position and is pushed to move forward by the paver. When paving, the asphalt mixture must be slowly, uniformly and continuously paved. Speed or intermediate pauses must not be changed at will. The height of the mix in the paver screw feeder remains no less than 2/3 of the feeder height. And ensures that segregation does not occur across the full width of the paver. The spreading temperature of the mixture is 140-150 ℃, the spreading coefficient is 1.25, and the spreading speed is 3-4 m/min.
(4) Compaction of mixes
Once the asphalt mixture is spread and leveled, and the irregular surface is finished, it is immediately compacted uniformly throughout. The method is carried out in three stages, namely initial pressure, secondary pressure and final pressure.
First pressing
The initial pressure is rolled after the spreading machine and is rolled by a double-steel-wheel vibratory roller. The initial pressing is carried out at 130-140 ℃, and the pushing and the cracking cannot be generated. The roller should roll from the outside towards the centre. The edge is firstly opened to be 30-40 cm wide, after the first time of pressing, most of the weight of the road roller is positioned on the compacted mixed material surface, and then the edge is pressed, so that outward pushing is reduced.
Pressure recovery
The re-compaction is performed immediately after the initial compaction, using a heavy pneumatic compactor. The rolling times are 4-6 times until no obvious wheel tracks are stable. The adjacent rolling belts are overlapped by 1/3-1/2 of the width of the rolling wheels.
Third end pressure
And final pressing is carried out immediately after re-pressing, the asphalt mixture is not lower than 70 ℃, a steel wheel road roller is adopted to roll for not less than 2 times until no obvious wheel track exists, and the temperature for compacting and forming the road surface meets the standard requirement.
Rolling is carried out from the outer side and is longitudinally parallel to the center line of the road, a double-wheel road roller is overlapped for 30cm each time, rolling is carried out from the inner side gradually, then conventional rolling is carried out, and rolling is carried out on a curve with an ultrahigh degree by adopting a method that the longitudinal stroke is overlapped parallel to the center line from the lower side to the higher side. When rolling, the road roller runs at a constant speed, and can not stay on a newly paved mixture or a road section which is not rolled and cooled, and turns or brakes suddenly.
In order to prevent the asphalt mixture from being stained on the rolling wheel in the rolling process of the road roller, fog, water mixed with a small amount of detergent or other approved materials can be sprayed on the rolling wheel, and the rolling wheel is properly moisturized.
Claims (7)
1. An application method of deoiled rock debris for an asphalt concrete pavement layer is characterized by comprising the following steps: specifically, as follows, the following description will be given,
i, material proportion, namely determining the using amount of the material according to the proportion of a surface layer material, wherein a 4cm asphalt concrete AC-13 upper surface layer, a 5cm asphalt concrete AC-16 middle surface layer and a 6cm asphalt concrete AC-20 lower surface layer are adopted; the mixture ratio of the surface layer material is specifically as follows by mass ratio:
the upper layer material is prepared according to the mixing amount of 30-35 percent of broken stone below 5mm, 25-34 percent of broken stone below 5-10mm, 26-32 percent of broken stone below 10-15mm, 2-5 percent of cement, 2-6 percent of deoiled rock debris and 4-5 percent of asphalt;
the middle surface layer material is prepared according to the proportion that the mixing amount of broken stones with the thickness of less than 5mm is 20-25%, the mixing amount of broken stones with the thickness of 5-10mm is 10-15%, the mixing amount of broken stones with the thickness of 10-15mm is 26-37%, the mixing amount of broken stones with the thickness of 15-18mm is 20-25%, the mixing amount of cement is 2-5%, the mixing amount of deoiled detritus is 2-6% and the mixing amount of asphalt is 4-5%;
the lower surface layer material is prepared according to the mixing amount of 20-25% of broken stone below 5mm, 8-18% of broken stone below 5-10mm, 26-37% of broken stone below 10-15mm, 20-25% of broken stone below 15-20mm, 2-5% of cement, 2-6% of deoiled rock debris and 4-5% of asphalt;
II, the construction method comprises the following steps:
step A, determining the proportion of an asphalt mixture according to a surface layer, calculating the using amount of materials and preparing the materials;
step B, normally drying the crushed stone aggregate in the step A according to the production requirement of the asphalt mixture, wherein the heating temperature of the crushed stone aggregate is 185-200 ℃;
step C, normally wet-mixing the dried aggregate with cement, deoiled rock debris and asphalt for 35-45s to form an asphalt mixture, wherein the mixing temperature of the asphalt mixture is 175-190 ℃; the discharging temperature is 170-175 ℃.
2. The method for applying the deoiled rock fragments to the asphalt concrete pavement according to claim 1, wherein the method comprises the following steps: the asphalt mixing amount in the upper surface layer is 5 percent.
3. The method for applying the deoiled rock debris to the asphalt concrete pavement according to claim 1, wherein the step of applying the deoiled rock debris to the asphalt concrete pavement comprises the following steps: the asphalt mixing amount in the middle surface layer is 4.7%.
4. The method for applying the deoiled rock fragments to the asphalt concrete pavement according to claim 1, wherein the method comprises the following steps: the asphalt content in the lower layer is 4%.
5. The method for applying the deoiled rock fragments to the asphalt concrete pavement according to any one of claims 1 to 4, wherein the method comprises the following steps: the thickness of the upper surface layer is 4cm, the thickness of the middle surface layer is 5cm, and the thickness of the lower surface layer is 6 cm.
6. The method for applying the deoiled rock debris to the asphalt concrete pavement according to claim 1, wherein the step of applying the deoiled rock debris to the asphalt concrete pavement comprises the following steps: the paving temperature of the asphalt mixture is 140-150 ℃, the paving coefficient is 1.25, and the paving speed is 3-4 m/min.
7. The method for applying the deoiled rock debris to the asphalt concrete pavement according to claim 1, wherein the step of applying the deoiled rock debris to the asphalt concrete pavement comprises the following steps: the asphalt mixture is paved and leveled, and after irregular surfaces are trimmed, the asphalt mixture is uniformly compacted, wherein the compaction is carried out in three stages, namely initial compaction, secondary compaction and final compaction; the initial pressing is carried out at the temperature of 130-140 ℃ of the asphalt mixture, and a double-steel-wheel vibratory roller is adopted for rolling; the re-pressing is carried out immediately after the initial pressing, a central tyre roller is adopted, and the rolling times are 4-6 times until no obvious wheel track exists stably; and the final pressing is carried out immediately after the re-pressing, the re-pressing is carried out at the temperature of the asphalt mixture not lower than 70 ℃, and the rolling is carried out for not less than two times by adopting a steel wheel road roller until no obvious wheel mark exists.
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