CN112482165B - Cold-mixing fracture grading anti-crack road maintenance method - Google Patents
Cold-mixing fracture grading anti-crack road maintenance method Download PDFInfo
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- CN112482165B CN112482165B CN202011423462.6A CN202011423462A CN112482165B CN 112482165 B CN112482165 B CN 112482165B CN 202011423462 A CN202011423462 A CN 202011423462A CN 112482165 B CN112482165 B CN 112482165B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
- E01C23/0973—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving with liquid or semi-liquid materials, e.g. crack sealants
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a cold mixing fracture grading anti-crack road maintenance method, which comprises the following steps: s1, paving a layer of quick-cracking modified emulsified asphalt and macadam on an original pavement to serve as a supporting structure; s2, pouring a layer of modified emulsified asphalt mixture as a filling structure on the supporting structure, filling the filling structure into gaps of the supporting structure after forming, and forming a layer of graded crack-resistant cover surface on the original pavement; wherein, the macadam used in the supporting structure is of single-grain level; the broken stones used in the filling structure are in continuous gradation and the particle size of the broken stones is smaller than that of the broken stones in the supporting structure; the broken stones used in the supporting structure and the broken stones used in the filling structure are in discontinuous grading; the dosage ratio of the broken stones used by the filling structure to the broken stones in the supporting structure is (4-5): (5-6). The invention realizes a layer of mutually embedded and extruded integral structure, particularly high strength and crack resistance by two-step process filling and stacking.
Description
Technical Field
The invention relates to road maintenance, in particular to a cold mixing fracture grading anti-crack road maintenance method.
Background
At present, the mainstream road maintenance technology in China has the following advantages and disadvantages:
1. washing, planing and paving: and (3) washing and planing the original pavement for 4cm, and then additionally paving a layer of 4cm hot mixed material. The process can better solve the problems of cracks, ruts, pits, shedding and the like of the original pavement. However, the process has high cost and long closed traffic time, the original pavement needs to be washed and planed, the washing and planing waste materials have no good treatment method, and the resource waste is serious.
2. Ultra-thin wearing layer: the ultra-thin wearing layer is formed by additionally laying a layer of 1.5-2.5cm hot asphalt mixture on the original pavement through a special laying vehicle. The function of the original road surface can be well restored. However, the process has the disadvantages of high cost, necessity of special paving equipment and requirement of light damage degree of the original pavement. Meanwhile, the process cannot solve the problem of the original pavement cracks. The original pavement cracks can be quickly reflected to the surface layer, so that water seepage and accelerated pavement damage are caused.
3. Micro-surfacing: a layer of micro-surfacing mixture of about 1cm is additionally paved on an original diseased pavement, and the micro-surfacing mixture is prepared by mixing stone chips or sand with certain gradation, fillers (cement, lime, fly ash, stone powder and the like), polymer modified emulsified asphalt, an admixture and water according to a certain proportion to prepare a flowing mixture. The micro-surfacing can better recover the function of the original pavement. However, the process has the disadvantages that the requirement on the original pavement is high, the process can be used when the damage degree of the original pavement is light, and the process cannot be used when the damage degree of the original pavement is heavy. Because the elastic recovery and force-measuring ductility of the conventional micro-surfacing emulsified asphalt are low, cracks of the original pavement cannot be processed at the micro-surfacing, and the cracks of the original pavement can be quickly reflected to the surface layer, so that water seepage and accelerated pavement damage are caused; in addition, it has less large aggregate and lower strength.
4. And (3) opening a common seal layer: the open sealing layer is formed by spraying one or two layers of modified asphalt or rubber powder modified asphalt macadam sealing layers on the original pavement, and then additionally spreading a layer of 1cm micro-surface emulsified asphalt mixture on the sealing layer, wherein the total thickness is 1.5-2.5cm. The effects of sealing water and improving the road driving comfort level can be achieved. However, the hot asphalt macadam seal coat is adopted, so that the smoke emission is large during construction, and the total cost is high due to large thickness; furthermore, the macadam adopted by the macadam seal layer is in non-graded distribution.
Disclosure of Invention
The invention provides a cold-mix fracture grading anti-crack road maintenance method, which aims to make up for the defects of the prior art and solve the problems that the prior art is long in construction period, high in cost, incapable of well treating cracks on the original road surface, low in strength and the like.
The invention is realized by the following technical scheme:
a cold mixing fracture grading anti-crack road maintenance method comprises the following steps:
s1, paving a layer of quick-cracking modified emulsified asphalt and macadam on an original pavement to serve as a supporting structure;
s2, pouring a layer of modified emulsified asphalt mixture as a filling structure on the supporting structure, enabling the filling structure to enter a gap of the supporting structure, and forming a layer of graded crack-resistant cover surface on the original pavement after forming;
wherein, the macadam used in the supporting structure is of single-grain level; the broken stones used in the filling structure are in continuous gradation and the particle size of the broken stones is smaller than that of the broken stones in the supporting structure; the broken stones used in the supporting structure and the broken stones used in the filling structure are in discontinuous grading; the dosage ratio of the broken stones used by the filling structure to the broken stones in the supporting structure is (4-5): (5-6).
Preferably, in S1, the crushed stone used in the support structure has a particle size of 5-10mm, and in S2, the crushed stone in the packing structure has a grading of 0-3mm.
Further, the fracture gradation passage rates after the crushed stones used in the supporting structure and the crushed stones used in the filling structure were compounded are shown in table 1 below:
TABLE 1 passage rate of open gradation
Preferably, in S1, the paving amount of the quick-cracking modified emulsified asphalt is 1.5-2Kg/m 2 The paving amount of the broken stones is 10-15Kg/m 2 (ii) a S2, in the poured filling structure, the crushed stone amount is 8-12Kg/m 2 The modified emulsified asphalt is 0.8-1.2Kg/m 2 0.4-1.2Kg/m of water 2 。
Preferably, in S1, the quick-cracking type modified emulsified asphalt adopts quick-cracking type SBS modified emulsified asphalt; and in the S2, the modified emulsified asphalt adopts slow-breaking quick-setting SBS modified emulsified asphalt.
Preferably, basalt is used as the crushed stone used in the supporting structure and the crushed stone used in the filling structure.
Preferably, in S1, before the quick-cracking modified emulsified asphalt and the broken stone are paved, the original pavement is subjected to light washing, planing and napping treatment, and dust and impurities are cleaned.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, firstly, the crushed stones with the single-grain size are paved to be used as a supporting structure, and after the crushed stones are paved, larger gaps exist among the crushed stones due to the single grain size. And then, pouring a small-particle-size gravel mixture on the supporting structure as a filling structure, and completely filling gravel in the filling structure into gaps formed by the gravel in the supporting structure under the action of gravity, so that a layer of mutual embedded and extruded integral structure is realized through filling and stacking in the two-step process. Because the invention adopts the two-step process to realize, pave the rubble of the large particle size first, and then pour the modified emulsified asphalt mixture, therefore the relative dosage of the rubble of the large particle size is high, make the big aggregate content in the final integral structure high, thus has improved the structural strength; the quick-cracking modified emulsified asphalt has the characteristics of high elastic recovery and high ductility ratio of force measurement, and provides strong cracking resistance and adhesion performance; the modified emulsified asphalt mixture is used as filling, and the strength and the crack resistance of the whole structure are further improved. The whole construction of the invention adopts emulsified asphalt, namely a cold mixing and cold paving technology, does not need heating, does not discharge asphalt smoke, and is environment-friendly and energy-saving.
Furthermore, basalt aggregate is adopted, so that better structural strength is provided for the pavement.
Drawings
FIG. 1 is a schematic view of the structure of the mat formed in accordance with the present invention.
Fig. 2 is a graph of a mixing profile.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The method is characterized in that the original pavement is preprocessed, a set of grading curve is designed, a layer of quick-cracking modified emulsified asphalt and crushed stone are paved as a supporting structure, the crushed stone is in a single-particle grade, the supporting structure is a part of the whole overlay structure, and the consumption and grading of the crushed stone and the asphalt meet the overall requirements. Directly pouring a layer of modified emulsified asphalt mixture on the supporting structure as a filling structure, wherein the crushed stone used by the filling structure is in continuous gradation and the particle size of the crushed stone is smaller than that of the crushed stone in the supporting structure, and the crushed stone used by the supporting structure and the crushed stone used by the filling structure are in discontinuous gradation; the filling structure is a supplementary part of the supporting structure, and after natural forming or rolling forming, the modified emulsified asphalt mixture is filled into the gap of the supporting structure to form a layer of graded anti-cracking cover surface on the original pavement, as shown in figure 1. The graded crack-resistant cover surface is characterized by composite graded design, namely, the integral graded design is formed after two layers are compounded, and the graded crack-resistant cover surface is different from the graded design of one-time paving in that the bottom layer provides better bonding, water sealing and crack-resistant effects. The dosage ratio of the broken stones used by the filling structure to the broken stones in the supporting structure is (4-5): (5-6).
The invention has the characteristics that: the particle size of the broken stones of the supporting structure is single gradation, and after the broken stones are paved, larger gaps exist among the broken stones. After the modified emulsified asphalt mixture with small particle size is poured, under the dual actions of a paving box and gravity which are specially designed, the modified emulsified asphalt mixture is completely filled in gaps formed by the broken stones in the supporting structure to form an integral cover surface structure, and the broken stones with large particle size in the supporting structure provide support and strength for the integral cover surface structure. The modified emulsified asphalt mixture is used as filling, so that the overall strength and crack resistance are further improved. Namely: the invention relates to a construction process method for realizing a layer of integral structure by adopting a two-step process.
Preferably, the particle size of the crushed stone in the supporting structure is 5-10mm, and the particle size of the crushed stone in the modified emulsified asphalt mixture is 0-3mm. The specific construction method comprises the following steps:
a) Carrying out light washing, planing and napping treatment on the original pavement, and cleaning up dust and sundries;
b) The quick-cracking modified emulsified asphalt and the broken stone are paved by a special paving vehicle, the broken stone has single grain diameter, and the paving amount of the quick-cracking modified emulsified asphalt is 1.5-2Kg/m 2 The crushed stone amount is 10-15Kg/m 2 ；
c) After finishing, pouring a layer of modified emulsified asphalt mixture, wherein the modified emulsified asphalt mixture comprises the following components in parts by weight: 10 parts of 0-3mm broken stone, 1 part of modified emulsified asphalt and 0.5-1 part of water. In the filling structure for pouring, the broken stone is 8-12Kg/m 2 The modified emulsified asphalt is 0.8-1.2Kg/m 2 0.4-1.2Kg/m of water 2 。
d) After the modified emulsified asphalt is formed, rolling for 3-5 times by using a rubber-wheel road roller to realize stone embedding and extruding formation.
e) And opening the traffic.
Specific examples are as follows.
Example 1
a) Carrying out light washing, planing and napping treatment on the original pavement, and cleaning up dust and sundries;
b) The quick-cracking modified emulsified asphalt and the crushed stone with the thickness of 5-10mm are paved by a special paving vehicle, and the quantity of the high-quick-cracking modified emulsified asphalt is 1.5Kg/m 2 The crushed stone amount is 10Kg/m 2 ；
c) After completion, a layer of slow crack is pouredThe quick-setting modified emulsified asphalt mixture is a slow-breaking quick-setting modified emulsified asphalt mixture, and 8Kg/m of 0-3mm broken stone 2 0.8Kg/m of slow-breaking and quick-setting modified emulsified asphalt 2 0.4Kg/m of water 2 。
d) After the emulsified asphalt is formed, rolling for 3 times by using a rubber-wheel road roller to realize stone embedding and extruding formation.
e) And opening the traffic.
Example 2
a) Carrying out light washing, planing and napping treatment on the original pavement, and cleaning up dust and sundries;
b) Paving fast-cracking modified emulsified asphalt and 5-10mm broken stone by adopting a special paving vehicle, wherein the quantity of the fast-cracking modified emulsified asphalt is 2Kg/m 2 The crushed stone amount is 15Kg/m 2 ；
c) After the completion, a layer of slow-breaking and quick-setting modified emulsified asphalt mixture is poured, and 12Kg/m of broken stone with the thickness of 0-3mm is poured in the slow-breaking and quick-setting modified emulsified asphalt mixture 2 Slow-breaking quick-setting modified emulsified asphalt 1.2Kg/m 2 1.2Kg/m of water 2 。
d) After the emulsified asphalt is formed, rolling for 3 times by using a rubber-wheel road roller to realize stone embedding and extruding formation.
e) And opening the traffic.
Example 3
a) Carrying out light washing, planing and napping treatment on the original pavement, and cleaning dust and sundries;
b) The quick-cracking modified emulsified asphalt and the crushed stone with the thickness of 5-10mm are paved by a special paving vehicle, and the amount of the high-viscosity high-elasticity quick-cracking modified emulsified asphalt is 1.8Kg/m 2 The crushed stone amount is 13Kg/m 2 ；
c) After the completion, a layer of slow-breaking and quick-setting modified emulsified asphalt mixture is poured, and 10Kg/m of 0-3mm broken stone is added into the slow-breaking and quick-setting modified emulsified asphalt mixture 2 Slow-breaking quick-setting modified emulsified asphalt 1Kg/m 2 0.8Kg/m of water 2 。
d) After the emulsified asphalt is formed, rolling for 5 times by using a rubber-wheel road roller to realize stone embedding and extruding formation.
e) And (5) opening traffic.
Example 4
a) Carrying out light washing, planing and napping treatment on the original pavement, and cleaning up dust and sundries;
b) Paving quick-cracking modified emulsified asphalt and 5-10mm broken stones by adopting a special paving vehicle, wherein the quantity of the quick-cracking modified emulsified asphalt is 1.5Kg/m 2 The crushed stone amount is 15Kg/m 2 ；
c) After the completion, a layer of slow-breaking and quick-setting modified emulsified asphalt mixture is poured, and 12Kg/m of broken stone with the thickness of 0-3mm is poured in the slow-breaking and quick-setting modified emulsified asphalt mixture 2 1.0Kg/m of slow-breaking quick-setting modified emulsified asphalt 2 0.6Kg/m of water 2 。
d) After the emulsified asphalt is formed, rolling for 5 times by using a rubber-wheel road roller to realize stone embedding and extruding formation.
e) And opening the traffic.
Example 5
a) Carrying out light washing, planing and napping treatment on the original pavement, and cleaning up dust and sundries;
b) Paving fast-cracking modified emulsified asphalt and 5-10mm broken stone by adopting a special paving vehicle, wherein the quantity of the fast-cracking modified emulsified asphalt is 2Kg/m 2 The crushed stone amount is 12Kg/m 2 ；
c) After the completion, a layer of slow-breaking and quick-setting modified emulsified asphalt mixture is poured, and 9Kg/m of 0-3mm broken stone is poured into the slow-breaking and quick-setting modified emulsified asphalt mixture 2 0.9Kg/m of slow-breaking and quick-setting modified emulsified asphalt 2 0.6Kg/m of water 2 。
d) After the emulsified asphalt is formed, rolling for 4 times by using a rubber-wheel road roller to realize stone embedding and extruding forming.
e) And opening the traffic.
In the above embodiment: the crushed stones of 5-10mm and 0-3mm are made of high-strength basalt; the gradation of the crushed stones 5 to 10mm and 0 to 3mm after mixing satisfies the gradation curve shown in FIG. 2 and the pass rate shown in Table 1. In actual construction, 5-10mm which meets the requirements is independently used as aggregate of the supporting structure, and 0-3mm which meets the requirements is used as aggregate of the modified emulsified asphalt mixture. The quick-cracking SBS modified emulsified asphalt is adopted as the quick-cracking type modified emulsified asphalt, and the technical requirements are shown in Table 2. The slow-breaking and quick-setting type modified emulsified asphalt adopts slow-breaking and quick-setting type SBS modified emulsified asphalt, and the technical indexes are shown in Table 3.
TABLE 1 composite open gradation passage
TABLE 2 index requirements for quick-crack modified emulsified asphalt
TABLE 3 index requirements for slow-breaking and quick-setting modified emulsified asphalt
The force ductility ratio of the adopted quick-cracking modified emulsified asphalt to the adopted slow-cracking quick-setting modified emulsified asphalt is more than or equal to 30 percent, which shows that the asphalt adopted by the invention has good crack resistance, so that the finally formed cover surface structure has good crack resistance.
Claims (4)
1. A cold mixing fracture grading anti-crack road maintenance method is characterized by comprising the following steps:
s1, paving a layer of quick-cracking modified emulsified asphalt and broken stone on an original pavement to serve as a supporting structure;
s2, pouring a layer of modified emulsified asphalt mixture as a filling structure on the supporting structure, and after rolling and forming, enabling the filling structure to enter a gap of the supporting structure to form a layer of graded crack-resistant cover surface on the original pavement;
wherein, the macadam used in the supporting structure is of single-grain level; the broken stones used in the filling structure are in continuous gradation and the particle size of the broken stones is smaller than that of the broken stones in the supporting structure; the broken stones used in the supporting structure and the broken stones used in the filling structure are in discontinuous grading; the dosage ratio of the broken stones used by the filling structure to the broken stones in the supporting structure is (4-5): (5-6);
in S1, the paving amount of the quick-cracking modified emulsified asphalt is 1.5-2Kg/m 2 The paving amount of the broken stones is 10-15Kg/m 2 (ii) a S2, in the poured filling structure, the crushed stone amount is 8-12Kg/m 2 The modified emulsified asphalt is 0.8-1.2Kg/m 2 0.4-1.2Kg/m of water 2 ；
In S1, the particle size of the crushed stone used in the supporting structure is 5-10mm, in S2, the grading of the crushed stone in the filling structure is 0-3mm;
the fracture gradation passage rate after the composition of the broken stones used in the supporting structure and the broken stones used in the filling structure is as follows: when the mesh size is 9.5mm, the minimum passing rate is 100 percent, and the maximum passing rate is 100 percent; when the mesh size is 4.75mm, the minimum passing rate is 40 percent, and the maximum passing rate is 55 percent; when the sieve pore size is 2.36mm, the minimum passing rate is 22 percent, and the maximum passing rate is 32 percent; when the mesh size is 1.18mm, the minimum passing rate is 18 percent, and the maximum passing rate is 25 percent; when the mesh size is 0.6mm, the minimum passing rate is 13 percent, and the maximum passing rate is 20 percent; when the mesh size is 0.3mm, the minimum passing rate is 10 percent, and the maximum passing rate is 15 percent; when the mesh size is 0.15mm, the minimum passing rate is 8 percent, and the maximum passing rate is 12 percent; when the mesh size is 0.075mm, the minimum passing rate is 6%, and the maximum passing rate is 9%.
2. The method for maintaining the cold-mix fracture-graded anti-crack road according to claim 1, wherein in the step S1, the quick-crack type modified emulsified asphalt is quick-crack type SBS modified emulsified asphalt; and in the S2, the modified emulsified asphalt adopts slow-breaking quick-setting SBS modified emulsified asphalt.
3. The method for maintaining the cold-mix fracture-graded anti-crack road according to claim 1, wherein basalt is used for both the crushed stones used in the supporting structure and the crushed stones used in the filling structure.
4. The method for maintaining the cold-mix fracture-graded anti-crack road according to claim 1, wherein in the step S1, before the quick-crack modified emulsified asphalt and the crushed stone are paved, the original road surface is subjected to light washing, planing and napping treatment, and dust and impurities are cleaned.
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| JPS51150518A (en) * | 1975-06-20 | 1976-12-24 | Chiyoda Chem Eng Construct Co | Object paved with weatherproof open grading asphalt |
| CN104499431B (en) * | 2015-01-08 | 2016-03-23 | 东南大学 | A kind of Steel Bridge Deck long-life paving structure and paving method thereof |
| CN106007489A (en) * | 2016-05-23 | 2016-10-12 | 江苏天诺道路材料科技有限公司 | Super-viscose fiber wearing layer cold-mixed asphalt mixture and preventive maintenance method of asphalt pavement |
| CN108457179A (en) * | 2018-04-17 | 2018-08-28 | 湖州市公路管理局 | Thin overlay structure and its construction method for Bridge Surface Paving by Cement transformation |
| CN111155402B (en) * | 2020-01-20 | 2022-02-18 | 西安嘉程建设科技有限公司 | Composite road maintenance top facing construction process |
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