CN107299577B - A method of blocking cement concrete pavement of aerodrome crack - Google Patents
A method of blocking cement concrete pavement of aerodrome crack Download PDFInfo
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- CN107299577B CN107299577B CN201710594904.5A CN201710594904A CN107299577B CN 107299577 B CN107299577 B CN 107299577B CN 201710594904 A CN201710594904 A CN 201710594904A CN 107299577 B CN107299577 B CN 107299577B
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- aerodrome
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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
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Road Repair (AREA)
Abstract
The invention discloses a kind of methods for blocking cement concrete pavement of aerodrome crack, are slowly injected into liquid nitrogen first along crack propagation direction until completing the cleaning to crack by liquid nitrogen gasification full of crack；After spraying water filling standing to crack, cladding system is bonded in cement concrete pavement of aerodrome locating for crack, and solid particulate materials are sent into crack using process of pneumatic transmission, solid particulate materials, which are full of behind crack, to be filled the water using water mists mode to crack position, solid particulate materials expansion curing after 180min-200min, cement concrete pavement of aerodrome is polished with concrete sanding machine and scribes anti-skid chequer, that is, is blocked and completed a crack.It is examined through practical application, method of the invention is able to achieve the comprehensive closure in cement concrete pavement of aerodrome crack, it can complete the reparation to microscopic checks, plugging effect is more preferable, crack sealing ratiod improves 50% or more, it ensures takeoff and landing safety, extends airfield pavement service life 30%-50%, there is wide applicability.
Description
Technical field
The present invention relates to a kind of method for blocking crack, especially a kind of side for blocking cement concrete pavement of aerodrome crack
Method.
Background technique
The road face structure type of Chinese Airport runway is relatively simple, and cement concrete road surface structure accounts for about 95%.It runs on airport
The normal use in road depends primarily on its structural behaviour, and with the continuous growth of air transportation amount, aircraft loads are continuously increased,
Aircraft day Sortie it is continuous soaring, also increasing to the load action of airfield runway, the coupling of temperature factor is made in addition
With the development of airfield runway cement concrete road surface internal crack generates various forms of destructions, is mainly shown as: crack, change
Shape, Seam failure and damaged surfaces.In order to ensure takeoff and landing safety and extend airfield runway service life, needs mixed to cement
Solidifying soil surface structure carries out reinforcement or functional rehabilitation, to improve face service performance.
Currently, the common method for blocking cement concrete pavement of aerodrome crack mainly has three classes both at home and abroad: 1. using nothing
Machine material blocks crack, and main body is cement, and essence is a kind of cementitious material.Thus, effect of the inorganic repair materials to crack
Mechanism is mainly to rely on the bonding osmosis of hydrolysis product of cement, is bonded together cement slurry with old concrete, plays
Sealing, the purpose for repairing crack；Inorganic repair materials also have no small defect, such as adhesion strength deficiency, are easy in biggish punching
It hits and de- split easily occurs under power；It will lead to raising for face after reparation, influence the planarization in face；In terms of concrete castability with other classes
There are also a certain distance for type repair materials, can only generally be injected into gap or crack of the diameter or width greater than 0.2mm, can not
It completes to the microscopic checks reparation between 0.1mm-0.2mm.2. blocking crack, organic polymer material using high-molecular organic material
Material is after pouring into facial cleft seam by polymer, polymerization reaction to occur in the curing process, passes through chemical bond force or Van der Waals force
Aggregate is bonded together, to achieve the purpose that filling, blocking concrete crack；The initial viscosity of organic material compared with
It is low, but the problem of bringing is that solidification post-shrinkage ratio is also big, generally 20% or so, is easy to happen and repairs between matrix concrete
Disengaging or generate biggish internal stress and make repairing failure.3. being sealed using the compound polymer material of organic material and inorganic material
Stifled crack, can wherein form the polymeric web of one layer of crosslinking, be adhered on mortar, and then prevent fine fisssure in cement-based material
Line extension；Polymer beads can be with biggish hole a part of in filling concrete mortar, and changes pore structure, enhances glue
Gel material slurry and old sand are starched and the adhesiveness of concrete, but cannot effectively block minute fissure, buries to takeoff and landing
Lower security risk.
Summary of the invention
In view of the above-mentioned problems of the prior art, the object of the present invention is to provide a kind of closure airport cement concrete roads
The method of facial cleft gap, adhesion strength is good, can complete reparation to microscopic checks；It is low to solidify post-shrinkage ratio, can be realized airport
The comprehensive closure in cement concrete road surface crack, guarantees the safety of takeoff and landing.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of closure cement concrete pavement of aerodrome crack
Method, include the following steps:
(1) cement concrete pavement of aerodrome crack situation is investigated using fracture width detector comprehensively, along crack propagation
Direction is slowly injected into liquid nitrogen until full of crack, completes the cleaning to crack by liquid nitrogen gasification；
(2) it after being filled the water using spray regime into cement concrete pavement of aerodrome crack, stands；
(3) cladding system is bonded in cement concrete pavement of aerodrome locating for crack using adhesive glue, forms crack envelope
Solid particulate materials are sent into crack, until solid particulate materials by stifled relatively closed space using process of pneumatic transmission
Full of crack；
(4) this section of cladding system is removed, is filled the water using water mists mode to crack position, is seeped until water is no longer lower；
(5) it is mixed to polish Airport Cement with concrete sanding machine for solid particulate materials expansion curing after 180min-200min
Solidifying soil surface simultaneously scribes anti-skid chequer, achievees the purpose that block cement concrete pavement of aerodrome crack；
(6) according to cement concrete pavement of aerodrome fractured zones situation, step (3)-(5) are repeated, until having blocked all
Crack.
As a preferred scheme of the invention, spray regime is to cement concrete pavement of aerodrome in the step (2)
The water supply pressure injected in crack is 0.4MPa-0.8MPa, and time of repose is 15min-20min after water filling.It can using the parameter
Water contacts more abundant with fracture surface after being filled the water with guarantee.
Preferably, the device that the pneumatic conveying of the step (3) is used is solid particulate materials delivery pipe, solid particle material
Material conveying tube one end is passed through in cladding system, the external solid particle conveying device of the other end.Open external solid particle conveying
Device, can by solid particulate materials delivery pipe into cladding system conveying solid substance granular materials.
The cladding system of step (3) can be stainless steel cover or other lids with constant weight and intensity, can incite somebody to action
Solid particulate materials limit wherein, prevent solid particulate materials from dispersing in air, guarantee to block efficiency, reduce waste.It is excellent
Choosing, the cladding system of the step (3) is transparent rubber lid, transparent rubber cap surface be it is soft, be easy with locating for crack
Cement concrete pavement of aerodrome bonding, and can also be observed that the progress that solid particulate materials are filled through transparent rubber lid.
Preferably, in order to guarantee atomizing effect, the device that the water mists mode of the step (4) is used is water atomizer(-iser).
Preferably, the solid particulate materials in the step (3) include: PO52.5 class g cement 36-40 mass parts, high suction
Water-base resin 15-19 mass parts, epoxy curing agent 10-15 mass parts, methylcellulose thickener 8-12 mass parts, sulphur aluminium
Sour calcium class cement expansive material 6-8 mass parts, polycarboxylate high performance water-reducing agent 6-8 mass parts, potassium aluminate accelerator 4-6 mass
Part and blast-furnace cinder 3-5 mass parts.The solid particulate materials setting time is short, and water absorption rate is greater than 150 times, can sufficiently melt with water
It closes, is conducive to coming into full contact with for solid particulate materials and Airport Cement concrete fracture surface below；Natural expansion rate is greater than
15%, it avoids and solidifies after-contraction and lead to and repair disengaging between matrix concrete or generate biggish internal stress and make to repair to lose
It loses, and plugging material expands in relatively closed crevice space, effect with pressure is generated in crevice space, can greatly enhance
Compactness after plugging material expansion；With strong cohesive force, and compression strength is greater than 70MPa, and flexural strength is greater than 9MPa, resists
Intensity is cut greater than 6MPa, so that there is higher comprehensive strength after final repairing.
Preferably, it in order to guarantee that solid particulate materials are able to enter small crack, smoothly realizes between 0.1mm-0.2mm
Microscopic checks reparation, the solid particulate materials partial size be -250 mesh of 180 mesh.
Preferably, the flow that the water mists mode of the step (4) fills the water is 50L/min-100L/min, and operating pressure is
1.4MPa-1.9MPa can ensure coming into full contact with for water and solid particulate materials using the flow appropriate and operating pressure, make
Obtaining solid particulate materials can quickly water swelling solidification.
Liquid nitrogen gasification process of the present invention assists in removing the dust of fracture surface to the cleaning in crack, enhancing plugging material with
The cohesive force of fracture surface；Crack uses spray regime to inject water into crack before blocking, it is ensured that water sufficiently connects with fracture surface
Touching is more advantageous to coming into full contact with for solid particulate materials and Airport Cement concrete fracture surface below；It is solid by pneumatic conveying
Body granular materials enters crack, can enter extremely small crack, and the closure in comprehensive completion crack effectively improves crack envelope
Stifled rate smoothly realizes the microscopic checks reparation between 0.1mm-0.2mm.Solid particulate materials use water mists mode after having blocked
Water filling, sufficiently absorbs water, crack plugging effect is more preferably convenient for solid particulate materials.The solid particulate materials of use have appropriateness expansion
Property, avoiding cure shrinkage causes to be detached between matrix.
It is examined through practical application, the present invention is able to achieve the comprehensive closure in cement concrete pavement of aerodrome crack, can be complete
The reparation of pairs of microscopic checks, plugging effect is more preferable, and crack sealing ratiod improves 50% or more, it is ensured that takeoff and landing safety,
Extend airfield pavement service life 30%-50%, there is wide applicability.
Detailed description of the invention
Fig. 1 is the schematic diagram that the present invention blocks cement concrete road surface crack.
In figure, 1. cement concrete pavement of aerodrome, 2. cracks, 3. cladding systems, 4. solid particulate materials, 5. solid particles
Material delivery tubes.
Specific embodiment
Below with reference to embodiment, invention is further described in detail.
Embodiment 1
The method for blocking cement concrete pavement of aerodrome crack, includes the following steps:
(1) 2 situation of crack for investigating cement concrete pavement of aerodrome 1 comprehensively using fracture width detector, instructs crack 2
The formulation of closure scheme.Liquid nitrogen is slowly injected into along the propagation direction in crack 2 until passing through liquid nitrogen gasification completion pair full of crack
The cleaning in crack；
(2) it is filled the water into the crack of cement concrete pavement of aerodrome 12 using spray regime, course of injection is to Airport Cement
The hydraulic pressure filled the water in the crack 2 of concrete road surface 1 is 0.4MPa, time of repose 15min；
(3) solidify adhesive glue with strength natural and cladding system 3 is bonded in Airport Cement concrete road locating for crack 2
On face 1, the relatively closed space that crack 2 blocks is formed, 5 one end of solid particulate materials delivery pipe is passed through in cladding system 3,
Solid particulate materials 4 are sent into crack by the external solid particle conveying device of the other end using the method for pneumatic conveying, until solid
Body granular materials 4 is full of crack 2；Cladding system 3 used is transparent rubber lid, is observed that solid by transparent rubber lid
The progress that granular materials 4 is filled.
(4) this section of crack plugging device 3 is removed, is filled the water using water atomizer(-iser) to 2 position of crack, the stream of water atomizer(-iser) water filling
Amount is 50L/min, operating pressure 1.4MPa, until the no longer lower infiltration of water, it is ensured that water sufficiently melts with solid particulate materials 4
It closes；
(5) expansion curing after 180min of solid particulate materials 4, with concrete sanding machine to Airport Cement concrete road
Anti-skid chequer is scribed in face 1, achievees the purpose that the crack 2 for blocking cement concrete pavement of aerodrome 1；
(6) according to the distribution situation in crack 2, step (3)-(5) are repeated, until having blocked all cracks.
It is examined through practical application, the present invention is able to achieve the comprehensive closure in cement concrete pavement of aerodrome crack, blocks effect
Fruit is good, and crack sealing ratiod improves 50%, it is ensured that takeoff and landing safety extends airfield pavement service life 30%, has extensive
Practicability.
Embodiment 2
The method for blocking cement concrete pavement of aerodrome crack, includes the following steps:
(1) 2 situation of crack for investigating cement concrete pavement of aerodrome 1 comprehensively using fracture width detector, instructs crack 2
The formulation of closure scheme.Liquid nitrogen is slowly injected into along the propagation direction in crack 2 until passing through liquid nitrogen gasification completion pair full of crack
The cleaning in crack；
(2) it is filled the water into the crack of cement concrete pavement of aerodrome 12 using spray regime, course of injection is to Airport Cement
The hydraulic pressure filled the water in the crack 2 of concrete road surface 1 is 0.8MPa, time of repose 20min；
(3) solidify adhesive glue with strength natural and cladding system 3 is bonded in Airport Cement concrete road locating for crack 2
On face 1, the relatively closed space that crack 2 blocks is formed, by 5 one end Jie cladding system 3 of solid particulate materials delivery pipe,
Solid particulate materials 4 are sent into crack by the external solid particle conveying device of the other end using the method for pneumatic conveying, until solid
Body granular materials 4 is full of crack 2；Cladding system 3 used is stainless steel cover.
(4) this section of crack plugging device 3 is removed, is filled the water using water mists mode to 2 position of crack, water mists mode fills the water
Flow be 100L/min, operating pressure 1.9MPa, until water no longer it is lower seep until, it is ensured that water and solid particulate materials 4
Sufficiently fusion；
(5) expansion curing after 200min of solid particulate materials 4, with concrete sanding machine to Airport Cement concrete road
Anti-skid chequer is scribed in face 1, achievees the purpose that the crack 2 for blocking cement concrete pavement of aerodrome 1；
(6) according to the distribution situation in crack 2, step (3)-(5) are repeated, until having blocked all cracks.
It is examined through practical application, the present invention is able to achieve the comprehensive closure in cement concrete pavement of aerodrome crack, blocks effect
Fruit is good, and crack sealing ratiod improves 60%, it is ensured that takeoff and landing safety extends airfield pavement service life 50%, has extensive
Practicability.
In above-mentioned two embodiment, the solid particulate materials that embodiment 1 is used include: 52.5 class g cement of PO, 36 mass
Part, 15 mass parts of super absorbent resin, 10 mass parts of epoxy curing agent, 8 mass parts of methylcellulose thickener, sulphur aluminic acid
6 mass parts of calcium class cement expansive material, 6 mass parts of polycarboxylate high performance water-reducing agent, 4 mass parts of potassium aluminate accelerator and blast furnace
3 mass parts of slag.
The solid particulate materials that embodiment 2 is used include: 52.5 class g cement of PO, 40 mass parts, super absorbent resin 19
Mass parts, 15 mass parts of epoxy curing agent, 12 mass parts of methylcellulose thickener, calcium sulphoaluminate class cement expansive material
8 mass parts, 5 mass parts of 8 mass parts of polycarboxylate high performance water-reducing agent, 6 mass parts of potassium aluminate accelerator and blast-furnace cinder.
Performance measurement is carried out to the solid particulate materials of embodiment 1,2.Shaping grinding apparatus is placed on after each component is sufficiently mixed
In, enough water is added, records initial volume and setting time.Sample shaping and demoulding is placed in standard curing room the standard that carries out
Maintenance, condition are as follows: 20 DEG C ± 2 DEG C of temperature, 95% or more relative humidity conserve 28 days.Nature expansion rate is calculated, test specimen is polished
For 100mm × 100mm × 100mm cube, mechanical property test is then carried out.Correlated performance test result is shown in Table 1.
The performance measurement of 1 solid particulate materials of table
As shown in Table 1, plugging material setting time of the invention is short, is able to satisfy cement concrete pavement of aerodrome and quickly repairs
Demand；Natural expansion rate is greater than 15%, avoids and solidifies after-contraction and lead to and repair disengaging or production between matrix concrete
Raw biggish internal stress makes repairing failure, and plugging material expands in relatively closed crevice space, produces in crevice space
Green tape presses effect, the compactness after capable of greatly enhancing plugging material expansion, and effectively closure microscopic checks, plugging effect is more preferable；
Have good shearing strength, flexural strength, compression strength, tensile strength excellent after solidification, and there is good adhesion strength,
It is able to satisfy the mechanics and reparation demand of the closure in cement concrete pavement of aerodrome crack.
Claims (7)
1. a kind of method for blocking cement concrete pavement of aerodrome crack, which comprises the steps of:
(1) cement concrete pavement of aerodrome crack situation is investigated using fracture width detector comprehensively, along crack propagation direction
Liquid nitrogen is slowly injected into until completing the cleaning to crack by liquid nitrogen gasification full of crack；
(2) it after being filled the water using spray regime into cement concrete pavement of aerodrome crack, stands；
(3) cladding system is bonded in cement concrete pavement of aerodrome locating for crack using adhesive glue, forms what crack blocked
Solid particulate materials are sent into crack, until solid particulate materials are full of by relatively closed space using process of pneumatic transmission
Crack；The solid particulate materials include: 52.5 class g cement 36-40 mass parts of P O, super absorbent resin 15-19 mass parts,
Epoxy curing agent 10-15 mass parts, methylcellulose thickener 8-12 mass parts, calcium sulphoaluminate class cement expansive material 6-
8 mass parts, polycarboxylate high performance water-reducing agent 6-8 mass parts, potassium aluminate accelerator 4-6 mass parts and blast-furnace cinder 3-5 mass
Part；
(4) this section of cladding system is removed, is filled the water using water mists mode to crack position, is seeped until water is no longer lower；
(5) solid particulate materials expansion curing after 180min-200min polishes airport cement concrete with concrete sanding machine
Anti-skid chequer is simultaneously scribed in road face, achievees the purpose that block cement concrete pavement of aerodrome crack；
(6) according to cement concrete pavement of aerodrome fractured zones situation, step (3)-(5) are repeated, until having blocked all cracks.
2. the method according to claim 1 for blocking cement concrete pavement of aerodrome crack, which is characterized in that the step
(2) water supply pressure that spray regime is injected into cement concrete pavement of aerodrome crack in is 0.4MPa-0.8MPa, quiet after water filling
Setting the time is 15min-20min.
3. the method according to claim 1 for blocking cement concrete pavement of aerodrome crack, which is characterized in that the step
(3) device that pneumatic conveying is used is solid particulate materials delivery pipe, and solid particulate materials delivery pipe one end is passed through covering dress
In setting, the external solid particle conveying device of the other end.
4. the method according to claim 1 for blocking cement concrete pavement of aerodrome crack, which is characterized in that the step
(3) cladding system is transparent rubber lid.
5. the method according to claim 1 for blocking cement concrete pavement of aerodrome crack, which is characterized in that the step
(4) device that water mists mode is used is water atomizer(-iser).
6. the method according to claim 1 for blocking cement concrete pavement of aerodrome crack, which is characterized in that the solid
Granular materials partial size is -250 mesh of 180 mesh.
7. the method according to claim 1 for blocking cement concrete pavement of aerodrome crack, which is characterized in that the step
(4) flow that water mists mode fills the water is 50L/min-100L/min, operating pressure 1.4MPa-1.9MPa.
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| CN201710594904.5A CN107299577B (en) | 2017-07-20 | 2017-07-20 | A method of blocking cement concrete pavement of aerodrome crack |
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| CN201710594904.5A CN107299577B (en) | 2017-07-20 | 2017-07-20 | A method of blocking cement concrete pavement of aerodrome crack |
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| CN108917815B (en) * | 2018-04-03 | 2020-11-06 | 徐州工程学院 | Pipe body structure for airport pavement crack simulation pipeline |
| CN111472226A (en) * | 2020-04-29 | 2020-07-31 | 无锡市政设计研究院有限公司 | non-Newtonian fluid pillow bag and method for temporarily repairing pavement by using same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4295311A (en) * | 1978-12-01 | 1981-10-20 | Tatis Plasttatningar Ab | Expansion joint element |
| CN102704367A (en) * | 2012-07-02 | 2012-10-03 | 河南万里路桥集团有限公司 | Road reflection crack welding material and construction process thereof |
| CN204589755U (en) * | 2015-03-31 | 2015-08-26 | 杜金华 | Pavement crack repair structure |
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2017
- 2017-07-20 CN CN201710594904.5A patent/CN107299577B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4295311A (en) * | 1978-12-01 | 1981-10-20 | Tatis Plasttatningar Ab | Expansion joint element |
| CN102704367A (en) * | 2012-07-02 | 2012-10-03 | 河南万里路桥集团有限公司 | Road reflection crack welding material and construction process thereof |
| CN204589755U (en) * | 2015-03-31 | 2015-08-26 | 杜金华 | Pavement crack repair structure |
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