CN113355969A - Asphalt pavement repairing method - Google Patents
Asphalt pavement repairing method Download PDFInfo
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- CN113355969A CN113355969A CN202110695151.3A CN202110695151A CN113355969A CN 113355969 A CN113355969 A CN 113355969A CN 202110695151 A CN202110695151 A CN 202110695151A CN 113355969 A CN113355969 A CN 113355969A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
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- 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
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- Civil Engineering (AREA)
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Abstract
The application relates to the field of asphalt pavement repair, and particularly discloses an asphalt pavement repair method, which comprises the following steps of S1 and grooving: a repairing groove is formed along the extension direction of the crack, the length of the repairing groove is greater than that of the crack, the width of the repairing groove is greater than that of the crack, and the height of the repairing groove is greater than that of the asphalt pavement; s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove; s3, filling the groove: pouring an asphalt repairing agent into a repairing groove to form a repairing layer, wherein the upper surface of the repairing layer is flush with the upper surface of the asphalt pavement; s4, groove sealing: the upper surface of the repairing layer is provided with the sealing layer through the seam tape, the sealing layer is arranged along the length direction of the repairing groove, the length of the sealing layer is larger than that of the repairing groove, the width of the sealing layer is larger than that of the repairing groove, and the pavement crack can be effectively repaired by the repairing method, so that the crack repairing effect is improved.
Description
Technical Field
The application relates to the field of asphalt pavement repair, in particular to an asphalt pavement repair method.
Background
Road construction is typically accomplished by laying a layer of asphalt pavement on the road base for the passage of vehicles. In China, the development trend of highway construction gradually changes from asphalt pavement laying to asphalt pavement maintenance. The problems of track, crack, pit and other diseases of the asphalt pavement are easy to occur, so that the maintenance of the asphalt pavement has attracted wide attention at home and abroad, and the maintenance of the asphalt pavement usually adopts three typical schemes of additional paving, overhaul and regeneration.
When in a low-temperature environment, the asphalt pavement is cracked continuously. When the cracks on the asphalt pavement need to be repaired, the traditional repairing method is to directly fill hot asphalt into the cracks, and the hot asphalt is cooled and solidified to bond the cracks.
According to the repairing method, the hot asphalt is directly poured into the cracks, the hot asphalt only stays on the surface of the pavement and cannot penetrate into the cracks, the repaired positions of the pavement are cracked again due to reflection of the internal cracks, and the repairing effect is poor.
Disclosure of Invention
In order to effectively repair the pavement cracks and improve the crack repair effect, the application provides an asphalt pavement repair method.
A method for repairing an asphalt pavement comprises the following steps,
s1, slotting: a repairing groove is formed along the extension direction of the crack, and the height of the repairing groove is greater than the thickness of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, filling the groove: pouring an asphalt repairing agent into the repairing groove to form a repairing layer, wherein the upper surface of the repairing layer is flush with the upper surface of the asphalt pavement;
s4, groove sealing: and arranging a sealing layer for sealing the repairing layer on the upper surface of the repairing layer, wherein the sealing layer is arranged along the length direction of the repairing groove.
By adopting the technical scheme, the asphalt repairing agent is poured into the repair groove, the asphalt repairing agent permeates into the asphalt pavement from the side wall of the repair groove, the asphalt repairing agent fills the repair groove, and meanwhile, the lower end of the repair layer is embedded in the highway pavement layer below the asphalt pavement, so that the connection strength of the repair layer on the highway base layer is effectively improved, pavement cracks are effectively repaired, the probability of secondary cracking is reduced, and the crack repair effect is improved.
Preferably, the end face of the repair groove is in an inverted trapezoid shape, the width of the upper surface of the repair groove is larger than that of the lower surface of the repair groove, and the width of the lower surface of the repair groove is larger than that of the crack.
By adopting the technical scheme, the area of the side wall of the repair groove is increased, so that the connection area of the repair layer and the original asphalt pavement is increased, the connection strength of the repair layer and the original asphalt pavement is improved, and the condition of secondary cracking is reduced.
Preferably, the groove cleaning step is completed, and then the groove filling step is performed through a heating step, wherein the heating step is to heat the side wall of the repair groove so as to soften the side wall of the repair groove.
By adopting the technical scheme, the asphalt component of the repair groove side wall is heated and softened, so that the asphalt repair agent and the repair groove side wall are mixed and bonded, the connection strength of the repair groove side wall and the repair layer is improved, and the probability of secondary cracking is reduced.
Preferably, in the step of filling the groove, after the asphalt repairing agent is poured into the repairing groove, the repairing layer is compacted in the vertical direction, the pressure applied to the repairing layer is 200-300 kpa, and the compacting time is 1-5 min.
By adopting the technical scheme, the asphalt repairing agent permeates into the side wall of the repairing groove by external extrusion, so that the connecting length of the joint of the plateau asphalt pavement and the repairing layer is further increased, and the connecting strength between the repairing layer and the original asphalt pavement is further improved.
Preferably, when the repairing layer is compacted, a rectangular template frame is built on the asphalt pavement, the length of the inner wall of the template frame is equal to the length of the repairing groove, the width of the inner wall of the template frame is equal to the width of the upper surface of the repairing groove, an asphalt repairing agent is injected into the repairing groove through the template frame, the upper liquid level of the asphalt repairing agent is higher than that of the asphalt pavement, after pouring, a compacting plate is vertically and slidably connected in the template frame and horizontally arranged, the side wall of the compacting plate abuts against the inner wall of the template frame, a balancing weight is arranged on the upper surface of the compacting plate, and the upper surface of the repairing layer is processed after compacting is finished, so that the upper surface of the repairing layer is flush with the asphalt pavement.
By adopting the technical scheme, the asphalt repairing agent is poured into the repairing groove through the template frame, the counter weight block extrudes the compacting plate, and the compacting plate extrudes the repairing layer, so that the asphalt repairing agent permeates into the original asphalt pavement, and the operation is simple and convenient.
Preferably, the asphalt repairing agent is prepared by mixing the following raw materials, by weight, 5-11 parts of emulsified asphalt, 4-8 parts of polyvinyl acetate emulsion, 9-15 parts of cement, 1-5 parts of deionized water, 0.5-1.5 parts of a water reducing agent, 6-14 parts of natural river sand and 32-44 parts of granite.
By adopting the technical scheme, the emulsified asphalt bonds the granite, the cement fills gaps of the granite, the polyvinyl acetate emulsion effectively improves the viscosity of the emulsified asphalt and the cement, simultaneously improves the bonding strength between the cement and the emulsified asphalt, the cement permeates into the original asphalt pavement, and the polyvinyl acetate emulsion connects the cement permeated into the original asphalt pavement with the emulsified asphalt, so that the connection strength between the repair layer and the original asphalt pavement is improved, and the condition of secondary cracking is reduced.
Preferably, the asphalt repairing agent further comprises 6-14 parts of rubber powder.
By adopting the technical scheme, the rubber powder is filled in the emulsified asphalt to play a role of a framework, so that the strength of the repairing layer is improved, and the condition that the asphalt pavement is cracked under pressure is reduced.
Preferably, the asphalt repair agent further comprises 8-16 parts of hydroxypropyl starch ether.
By adopting the technical scheme, the hydroxypropyl starch ether improves the viscosity of the asphalt repair agent, so that the connection strength among cement, emulsified asphalt and polyvinyl acetate emulsion is improved, and the connection strength between a post-repair layer and an original asphalt pavement, after the cement permeates into the original asphalt pavement, is improved.
Preferably, S1, mixing cement, natural river sand, hydroxypropyl starch ether, water and a water reducing agent uniformly to prepare mixed cement mortar; and S2, adding emulsified asphalt, polyvinyl acetate emulsion, rubber powder and granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
By adopting the technical scheme, the granite gap is filled with the mixed cement mortar, and meanwhile, the polyvinyl acetate emulsion improves the connection strength between the cement mortar and the emulsified asphalt, so that the repair layer strength is effectively improved, and meanwhile, the connection strength between the repair layer and the original asphalt pavement is improved.
In summary, the present application has the following beneficial effects:
1. according to the asphalt pavement repairing method, the repairing groove is formed in the crack, the asphalt repairing agent is poured into the repairing groove, the asphalt repairing agent is combined with the original asphalt pavement in a penetrating mode, the repairing groove is filled, and therefore the condition that the asphalt pavement is cracked again is effectively reduced.
2. The asphalt repair agent in this application adopts the polyvinyl acetate emulsion to improve the joint strength between cement mortar and the emulsified asphalt, and after cement mortar permeates into former asphalt pavement, the polyvinyl acetate emulsion makes cement mortar anchor in the repair groove lateral wall to improve the joint strength of the former asphalt pavement of repair layer.
3. The asphalt repair agent improves the viscosity of cement mortar, emulsified asphalt and polyvinyl acetate emulsion through hydroxypropyl starch ether, further improves the connection strength of the cement mortar, the polyvinyl acetate emulsion and the emulsified asphalt, and effectively improves the connection strength of a repair layer and an asphalt pavement.
Detailed Description
The procurement of emulsified asphalt in this application from Weifang Guangzheng waterproof Material Co., Ltd,
polyvinyl acetate was purchased from Indochi technologies, Inc. of Tianjin,
the cement is portland slag cement purchased from Sanhe Dingxuan-Sansheng Shang trade Co Ltd,
the water reducing agent is a naphthalene water reducing agent, purchased from Shandong Tongsheng building materials Co, Ltd,
the natural river sand with the grain diameter of 0.5-4.75 mm is purchased from a processing plant of Zhenghe river mine products in Lingshou county,
the particle size of granite is 5-20 mm, the granite is purchased from Shijiazhuangyuan mineral product trade company Limited,
rubber powder was purchased from Shandong Luke composites, Inc.,
hydroxypropyl starch ether was purchased from keplerian biotechnology limited, shandong.
The present application will be described in further detail with reference to examples.
Preparation example of asphalt repair agent
Preparation example 1
S1, uniformly mixing 90kg of cement, 70kg of natural river sand, 10kg of deionized water and 5kg of water reducing agent to prepare mixed cement mortar;
s2, adding 50kg of emulsified asphalt, 40kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 2
S1, uniformly mixing 90kg of cement, 70kg of natural river sand, 30kg of deionized water and 5kg of water reducing agent to prepare mixed cement mortar;
s2, adding 50kg of emulsified asphalt, 40kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 3
S1, uniformly mixing 90kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 40kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 4
S1, uniformly mixing 90kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 110kg of emulsified asphalt, 40kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 5
S1, uniformly mixing 90kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 6
S1, uniformly mixing 90kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 80kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 7
S1, uniformly mixing 120kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 80kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 8
S1, uniformly mixing 150kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 80kg of polyvinyl acetate emulsion and 320kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 9
S1, uniformly mixing 120kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 80kg of polyvinyl acetate emulsion and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 10
S1, uniformly mixing 120kg of cement, 70kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 80kg of polyvinyl acetate emulsion and 440kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 11
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 20kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 12
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 60kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 13
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 100kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 14
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 140kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 15
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 180kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 16
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 40kg of hydroxypropyl starch ether, 30kg of deionized water and 10kg of water reducing agent to obtain mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 100kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 17
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 80kg of hydroxypropyl starch ether, 30kg of deionized water and 10kg of water reducing agent to obtain mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 100kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 18
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 120kg of hydroxypropyl starch ether, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 100kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 19
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 160kg of hydroxypropyl starch ether, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 100kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 20
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 200kg of hydroxypropyl starch ether, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion, 100kg of rubber powder and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 21
S1, uniformly mixing 150kg of cement, 130kg of natural river sand, 50kg of deionized water and 15kg of water reducing agent to prepare mixed cement mortar;
s2, adding 110kg of emulsified asphalt, 80kg of polyvinyl acetate emulsion and 440kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 22
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
and S2, adding 60kg of polyvinyl acetate emulsion and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 23
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
and S2, adding 80kg of emulsified asphalt and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 24
S1, uniformly mixing 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
s2, adding 80kg of emulsified asphalt, 60kg of polyvinyl acetate emulsion and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 25
S1, uniformly mixing 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
and S2, adding 80kg of emulsified asphalt and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 26
S1, uniformly mixing 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
and S2, adding 60kg of polyvinyl acetate emulsion and 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
Preparation example 27
S1, uniformly mixing 120kg of cement, 100kg of natural river sand, 30kg of deionized water and 10kg of water reducing agent to prepare mixed cement mortar;
and S2, adding 380kg of granite into the mixed cement mortar uniformly mixed in the S1, and uniformly stirring and mixing to obtain the asphalt repairing agent.
Table 1 preparation examples raw material composition table
| Emulsified asphalt (kg) | Polyvinyl acetate emulsion (kg) | Cement (kg) | Deionized water (kg) | Water reducing agent (kg) | Natural river sand (kg) | Granite (kg) | Rubber powder (kg) | Hydroxypropyl starch ether (kg) | |
| Preparation example 1 | 50 | 40 | 90 | 10 | 5 | 70 | 320 | / | / |
| Preparation example 2 | 50 | 40 | 90 | 30 | 5 | 70 | 320 | / | / |
| Preparation example 3 | 50 | 40 | 90 | 30 | 10 | 100 | 320 | / | / |
| Preparation example 4 | 80 | 40 | 90 | 30 | 10 | 100 | 320 | / | / |
| Preparation example 5 | 110 | 40 | 90 | 30 | 10 | 100 | 320 | / | / |
| Preparation example 6 | 80 | 60 | 90 | 30 | 10 | 100 | 320 | / | / |
| Preparation example 7 | 80 | 80 | 90 | 30 | 10 | 100 | 320 | / | / |
| Preparation example 8 | 80 | 60 | 120 | 30 | 10 | 100 | 320 | / | / |
| Preparation example 9 | 80 | 60 | 150 | 30 | 10 | 100 | 320 | / | / |
| Preparation example 10 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | / | / |
| Preparation example 11 | 80 | 60 | 120 | 30 | 10 | 100 | 440 | / | / |
| Preparation example 12 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 20 | / |
| Preparation example 13 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 60 | / |
| Preparation example 14 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 100 | / |
| Preparation example 15 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 140 | / |
| Preparation example 16 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 180 | / |
| Preparation example 17 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 100 | 40 |
| Preparation example 18 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 100 | 80 |
| Preparation example 19 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 100 | 120 |
| Preparation example 20 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 100 | 160 |
| Preparation example 21 | 80 | 60 | 120 | 30 | 10 | 100 | 380 | 100 | 200 |
| Preparation example 22 | / | 60 | 120 | 30 | 10 | 100 | 380 | / | / |
| Preparation example 23 | 80 | / | 120 | 30 | 10 | 100 | 380 | / | / |
| Preparation example 24 | 80 | 60 | / | 30 | 10 | 100 | 380 | / | / |
| Preparation example 25 | 80 | / | / | 30 | 10 | 100 | 380 | / | / |
| Preparation example 26 | / | 60 | / | 30 | 10 | 100 | 380 | / | / |
| Preparation example 27 | / | / | 120 | 30 | 10 | 100 | 380 | / | / |
Examples
Example 1
S1, slotting: a repairing groove is formed along the extension direction of the crack, the length of the repairing groove is greater than that of the crack, the repairing groove is an inverted trapezoidal groove, the width of the upper surface of the repairing groove is greater than that of the lower surface, the width of the lower surface of the repairing groove is greater than that of the crack, and the height of the repairing groove is greater than that of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, filling the groove: pouring the asphalt repairing agent prepared in the preparation example 1 into a repairing groove to form a repairing layer, wherein the upper surface of the repairing layer is flush with the upper surface of the asphalt pavement;
s4, groove sealing: and arranging a sealing layer on the upper surface of the repairing layer through a seam tape, wherein the sealing layer is arranged along the length direction of the repairing groove, the length of the sealing layer is greater than that of the repairing groove, and the width of the sealing layer is greater than that of the repairing groove.
Example 2
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 2 was selected in S3.
Example 3
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 3 was selected in S3.
Example 4
The difference from example 1 is that the asphalt repair agent prepared in preparation example 4 was selected in S3.
Example 5
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 5 was selected in S3.
Example 6
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 6 was selected in S3.
Example 7
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 7 was selected in S3.
Example 8
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 8 was selected in S3.
Example 9
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 9 was selected in S3.
Example 10
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 10 was selected in S3.
Example 11
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 11 was selected in S3.
Example 12
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 12 was selected in S3.
Example 13
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 13 was selected in S3.
Example 14
The difference from example 1 is that the asphalt repair agent prepared in preparation example 14 was selected in S3.
Example 15
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 15 was selected in S3.
Example 16
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 16 was selected in S3.
Example 17
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 17 was selected in S3.
Example 18
The difference from example 1 is that the asphalt repair agent prepared in preparation example 18 was selected in S3.
Example 19
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 19 was selected in S3.
Example 20
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 20 was selected in S3.
Example 21
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 21 was selected in S3.
Example 22
S1, slotting: a repairing groove is formed along the extension direction of the crack, the length of the repairing groove is greater than that of the crack, the repairing groove is an inverted trapezoidal groove, the width of the upper surface of the repairing groove is greater than that of the lower surface, the width of the lower surface of the repairing groove is greater than that of the crack, and the height of the repairing groove is greater than that of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, heating; heating the side wall of the repair groove by using a flame gun to soften the side wall of the repair groove;
s4, filling the groove: pouring the asphalt repairing agent prepared in the preparation example 18 into a repairing groove to form a repairing layer, wherein the upper surface of the repairing layer is flush with the upper surface of the asphalt pavement;
s5, groove sealing: and arranging a sealing layer on the upper surface of the repairing layer through a seam tape, wherein the sealing layer is arranged along the length direction of the repairing groove, the length of the sealing layer is greater than that of the repairing groove, and the width of the sealing layer is greater than that of the repairing groove.
Example 23
S1, slotting: a repairing groove is formed along the extension direction of the crack, the length of the repairing groove is greater than that of the crack, the repairing groove is an inverted trapezoidal groove, the width of the upper surface of the repairing groove is greater than that of the lower surface, the width of the lower surface of the repairing groove is greater than that of the crack, and the height of the repairing groove is greater than that of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, filling the groove: building a rectangular template frame on the asphalt pavement, wherein the length of the inner wall of the template frame is equal to the length of the repair groove, the width of the inner wall of the template frame is equal to the width of the upper surface of the repair groove, the asphalt repair agent prepared in preparation example 18 is injected into the repair groove through the template frame, the upper liquid level of the asphalt repair agent is higher than that of the asphalt pavement, after the asphalt repair agent is poured, a compacting plate is vertically and slidably connected in the template frame, the compacting plate is horizontally arranged, the side wall of the compacting plate is abutted against the inner wall of the template frame, a balancing weight is arranged on the upper surface of the compacting plate, the pressure applied to the repair layer is 200kpa, the compacting time is 1min, and the upper surface of the repair layer is treated after the compacting is finished, so that the upper surface of the repair layer is flush with the asphalt pavement;
s4, groove sealing: and arranging a sealing layer on the upper surface of the repairing layer through a seam tape, wherein the sealing layer is arranged along the length direction of the repairing groove, the length of the sealing layer is greater than that of the repairing groove, and the width of the sealing layer is greater than that of the repairing groove.
Example 24
S1, slotting: a repairing groove is formed along the extension direction of the crack, the length of the repairing groove is greater than that of the crack, the repairing groove is an inverted trapezoidal groove, the width of the upper surface of the repairing groove is greater than that of the lower surface, the width of the lower surface of the repairing groove is greater than that of the crack, and the height of the repairing groove is greater than that of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, filling the groove: building a rectangular template frame on the asphalt pavement, wherein the length of the inner wall of the template frame is equal to the length of the repair groove, the width of the inner wall of the template frame is equal to the width of the upper surface of the repair groove, the asphalt repair agent prepared in preparation example 18 is injected into the repair groove through the template frame, the upper liquid level of the asphalt repair agent is higher than that of the asphalt pavement, after pouring, a compacting plate is vertically and slidably connected in the template frame, the compacting plate is horizontally arranged, the side wall of the compacting plate is abutted against the inner wall of the template frame, the upper surface of the compacting plate is provided with a balancing weight, the pressure on the repair layer is 250kpa, the compacting time is 3min, and after compacting is finished, the upper surface of the repair layer is treated to enable the upper surface of the repair layer to be flush with the asphalt pavement;
s4, groove sealing: and arranging a sealing layer on the upper surface of the repairing layer through a seam tape, wherein the sealing layer is arranged along the length direction of the repairing groove, the length of the sealing layer is greater than that of the repairing groove, and the width of the sealing layer is greater than that of the repairing groove.
Example 25
S1, slotting: a repairing groove is formed along the extension direction of the crack, the length of the repairing groove is greater than that of the crack, the repairing groove is an inverted trapezoidal groove, the width of the upper surface of the repairing groove is greater than that of the lower surface, the width of the lower surface of the repairing groove is greater than that of the crack, and the height of the repairing groove is greater than that of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, filling the groove: building a rectangular template frame on the asphalt pavement, wherein the length of the inner wall of the template frame is equal to the length of the repair groove, the width of the inner wall of the template frame is equal to the width of the upper surface of the repair groove, the asphalt repair agent prepared in preparation example 18 is injected into the repair groove through the template frame, the upper liquid level of the asphalt repair agent is higher than that of the asphalt pavement, after pouring, a compacting plate is vertically and slidably connected in the template frame, the compacting plate is horizontally arranged, the side wall of the compacting plate is abutted against the inner wall of the template frame, the upper surface of the compacting plate is provided with a balancing weight, the pressure on the repair layer is 300kpa, the compacting time is 5min, and after compacting is finished, the upper surface of the repair layer is treated to enable the upper surface of the repair layer to be flush with the asphalt pavement;
s4, groove sealing: and arranging a sealing layer on the upper surface of the repairing layer through a seam tape, wherein the sealing layer is arranged along the length direction of the repairing groove, the length of the sealing layer is greater than that of the repairing groove, and the width of the sealing layer is greater than that of the repairing groove.
Example 26
S1, slotting: a repairing groove is formed along the extension direction of the crack, the length of the repairing groove is greater than that of the crack, the repairing groove is an inverted trapezoidal groove, the width of the upper surface of the repairing groove is greater than that of the lower surface, the width of the lower surface of the repairing groove is greater than that of the crack, and the height of the repairing groove is greater than that of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, heating; heating the side wall of the repair groove by using a flame gun to soften the side wall of the repair groove;
s4, filling the groove: building a rectangular template frame on the asphalt pavement, wherein the length of the inner wall of the template frame is equal to the length of the repair groove, the width of the inner wall of the template frame is equal to the width of the upper surface of the repair groove, the asphalt repair agent prepared in preparation example 18 is injected into the repair groove through the template frame, the upper liquid level of the asphalt repair agent is higher than that of the asphalt pavement, after pouring, a compacting plate is vertically and slidably connected in the template frame, the compacting plate is horizontally arranged, the side wall of the compacting plate is abutted against the inner wall of the template frame, the upper surface of the compacting plate is provided with a balancing weight, the pressure on the repair layer is 250kpa, the compacting time is 3min, and after compacting is finished, the upper surface of the repair layer is treated to enable the upper surface of the repair layer to be flush with the asphalt pavement;
s5, groove sealing: and arranging a sealing layer on the upper surface of the repairing layer through a seam tape, wherein the sealing layer is arranged along the length direction of the repairing groove, the length of the sealing layer is greater than that of the repairing groove, and the width of the sealing layer is greater than that of the repairing groove.
Comparative example
Comparative example 1
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 22 was selected in S3.
Comparative example 2
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 23 was selected in S3.
Comparative example 3
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 24 was selected in S3.
Comparative example 4
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 25 was selected in S3.
Comparative example 5
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 26 was selected in S3.
Comparative example 6
The difference from example 1 is that the asphalt restoration agent prepared in preparation example 27 was selected in S3.
Performance test
The asphalt repairing agents prepared in the preparation examples 1-27 and the joints between the original asphalt pavements repaired in the examples 1-26 and the original asphalt repairing agents repaired in the comparative examples 1-6 are detected according to a JTG E20-2011 test procedure for road engineering asphalt and asphalt mixtures T0716 plus 2011 asphalt mixture splitting test, and specific detection data are shown in a table 2.
TABLE 2 splitting strength data sheet
| Splitting strength (MPa) | Splitting strength (MPa) | Splitting strength (MPa) | |||
| Preparation example 1 | 1.95 | Example 1 | 1.37 | Comparative example 1 | 1.13 |
| Preparation example 2 | 2.02 | Example 2 | 1.42 | Comparative example 2 | 1.09 |
| Preparation example 3 | 2.24 | Example 3 | 1.66 | Comparative example 3 | 1.11 |
| Preparation example 4 | 2.11 | Example 4 | 1.52 | Comparative example 4 | 0.43 |
| Preparation example 5 | 2.46 | Example 5 | 1.88 | Comparative example 5 | 0.58 |
| Preparation example 6 | 2.31 | Example 6 | 1.71 | Comparative example 6 | 0.56 |
| Preparation example 7 | 2.52 | Example 7 | 1.94 | / | / |
| Preparation example 8 | 2.37 | Example 8 | 1.77 | / | / |
| Preparation example 9 | 2.68 | Example 9 | 2.1 | / | / |
| Preparation example 10 | 2.54 | Example 10 | 1.94 | / | / |
| Preparation example 11 | 2.79 | Example 11 | 2.21 | / | / |
| Preparation example 12 | 2.84 | Example 12 | 2.24 | / | / |
| Preparation example 13 | 3.13 | Example 13 | 2.55 | / | / |
| Preparation example 14 | 2.97 | Example 14 | 2.37 | / | / |
| Preparation example 15 | 2.98 | Example 15 | 2.4 | / | / |
| Preparation example 16 | 3.47 | Example 16 | 2.87 | / | / |
| Preparation example 17 | 3.64 | Example 17 | 3.06 | / | / |
| Preparation example 18 | 3.87 | Example 18 | 3.27 | / | / |
| Preparation example 19 | 3.68 | Example 19 | 3.1 | / | / |
| Preparation example 20 | 3.42 | Example 20 | 2.82 | / | / |
| Preparation example 21 | 1.78 | Example 21 | 1.2 | / | / |
| Preparation example 22 | 1.73 | Example 22 | 3.41 | / | / |
| Preparation example 23 | 1.67 | Example 23 | 3.46 | / | / |
| Preparation example 24 | 1.71 | Example 24 | 3.66 | / | / |
| Preparation example 25 | 1.01 | Example 25 | 3.37 | / | / |
| Preparation example 26 | 1.18 | Example 26 | 3.71 | / | / |
| Preparation example 27 | 1.14 | / | / | / | / |
It can be seen from the combination of example 9, comparative example 2, comparative example 4 and comparative example 6 and the combination of table 2 that the cement mortar is added to improve the connection strength between the repair layer and the original asphalt pavement, and the polyvinyl acetate emulsion is added to further improve the connection strength between the repair layer and the original asphalt pavement, so that the cement mortar permeating into the original asphalt pavement is enabled to play a role in anchoring and the connection strength between the cement mortar and the original asphalt pavement is effectively improved because the cement mortar is more easily permeated into the original asphalt pavement.
By combining the preparation examples 9 and 14 and combining the table 2, the splitting strength of the repairing layer is obviously improved after the rubber powder is added, so that the condition that the repairing layer is cracked by extrusion is reduced.
It can be seen from the combination of example 14 and example 18 and table 2 that, after the hydroxypropyl starch ether is added, the connection strength between the repair layer and the original asphalt pavement is obviously improved, the viscosity of the cement mortar, emulsified asphalt and polyvinyl acetate emulsion is improved by the hydroxypropyl starch ether, and the connection strength between the cement mortar, the polyvinyl acetate emulsion and the emulsified asphalt is further improved.
By combining example 18, example 22, example 23, and example 25, and by combining table 2, it can be seen that the original asphalt pavement is softened by baking the side walls of the repair groove, and then the asphalt repair agent is connected with the repair groove walls by compacting, so that the connection strength between the repair layer and the original asphalt pavement is effectively improved, and the situation of cracking at the connection between the repair layer and the original asphalt pavement is reduced.
As can be seen by combining example 24, example 25 and example 26 with table 2, the strength of the bond between the healing agent and the sidewalls of the healing groove is increased by selecting an appropriate pressure and compaction time.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The asphalt pavement repairing method is characterized by comprising the following steps of,
s1, slotting: a repairing groove is formed along the extension direction of the crack, and the height of the repairing groove is greater than the thickness of the asphalt pavement;
s2, cleaning the groove: cleaning dust on the side wall of the repair groove, and removing loose parts of the side wall of the repair groove;
s3, filling the groove: pouring an asphalt repairing agent into the repairing groove to form a repairing layer, wherein the upper surface of the repairing layer is flush with the upper surface of the asphalt pavement;
s4, groove sealing: and arranging a sealing layer for sealing the repairing layer on the upper surface of the repairing layer, wherein the sealing layer is arranged along the length direction of the repairing groove.
2. The asphalt pavement restoration method according to claim 1, wherein the end face of the restoration groove is in an inverted trapezoid shape, the width of the upper surface of the restoration groove is larger than that of the lower surface of the restoration groove, and the width of the lower surface of the restoration groove is larger than that of the crack.
3. The asphalt pavement restoration method according to claim 2, wherein the groove cleaning step is completed, and then the groove filling step is performed through a heating step, wherein the heating step is performed by heating the side walls of the restoration groove to soften the side walls of the restoration groove.
4. The asphalt pavement repairing method according to claim 2 or 3, wherein in the step of filling the groove, after the asphalt repairing agent is poured into the repairing groove, the repairing layer is compacted in the vertical direction, the pressure applied to the repairing layer is 200-300 kpa, and the compacting time is 1-5 min.
5. The asphalt pavement restoration method according to claim 4, wherein a rectangular template frame is built on the asphalt pavement when the restoration layer is compacted, the length of the inner wall of the template frame is equal to the length of the restoration groove, the width of the inner wall of the template frame is equal to the width of the upper surface of the restoration groove, the asphalt restoration agent is injected into the restoration groove through the template frame, the upper liquid level of the asphalt restoration agent is higher than that of the asphalt pavement, after the asphalt pavement is poured, a compaction plate is vertically and slidably connected in the template frame, the compaction plate is horizontally arranged, the side wall of the compaction plate abuts against the inner wall of the template frame, a balancing weight is arranged on the upper surface of the compaction plate, and after the compaction is finished, the upper surface of the restoration layer is processed, so that the upper surface of the restoration layer is flush with the asphalt pavement.
6. The asphalt pavement restoration method according to any one of claims 1 to 5, wherein the asphalt restoration agent is prepared by mixing, by weight, 5 to 11 parts of emulsified asphalt, 4 to 8 parts of polyvinyl acetate emulsion, 9 to 15 parts of cement, 1 to 5 parts of deionized water, 0.5 to 1.5 parts of a water reducing agent, 6 to 14 parts of natural river sand and 32 to 44 parts of granite.
7. The asphalt pavement restoration method according to claim 6, wherein the asphalt restoration agent further comprises 6-14 parts of rubber powder.
8. The asphalt pavement restoration method according to claim 7, wherein the asphalt restoration agent further comprises 8-16 parts of hydroxypropyl starch ether.
9. The asphalt pavement restoration method according to claim 8, wherein the preparation method of the asphalt restoration agent comprises the following steps,
s1, uniformly mixing cement, natural river sand, hydroxypropyl starch ether, water and a water reducing agent to prepare mixed cement mortar;
and S2, adding emulsified asphalt, polyvinyl acetate emulsion, rubber powder and granite into the mixed cement mortar uniformly mixed in the S1, and stirring and uniformly mixing to obtain the asphalt repairing agent.
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