CN116396014A - Rubber powder epoxy asphalt cement for expansion joint, prefabricated structure, preparation method and application thereof - Google Patents
Rubber powder epoxy asphalt cement for expansion joint, prefabricated structure, preparation method and application thereof Download PDFInfo
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- CN116396014A CN116396014A CN202310398314.0A CN202310398314A CN116396014A CN 116396014 A CN116396014 A CN 116396014A CN 202310398314 A CN202310398314 A CN 202310398314A CN 116396014 A CN116396014 A CN 116396014A
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- rubber powder
- epoxy asphalt
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- expansion joint
- aggregate
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- 239000010426 asphalt Substances 0.000 title claims abstract description 194
- 239000000843 powder Substances 0.000 title claims abstract description 171
- 229920001971 elastomer Polymers 0.000 title claims abstract description 167
- 239000005060 rubber Substances 0.000 title claims abstract description 167
- 239000004593 Epoxy Substances 0.000 title claims abstract description 133
- 239000004568 cement Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 73
- 239000003822 epoxy resin Substances 0.000 claims abstract description 49
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 45
- 239000011159 matrix material Substances 0.000 claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 238000012423 maintenance Methods 0.000 claims abstract description 29
- 238000010276 construction Methods 0.000 claims abstract description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 14
- 239000011707 mineral Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 7
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 44
- 238000010438 heat treatment Methods 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 26
- 238000010008 shearing Methods 0.000 claims description 24
- 230000036541 health Effects 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 20
- 239000010920 waste tyre Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 14
- 239000000376 reactant Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 8
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- KMOUUZVZFBCRAM-OLQVQODUSA-N (3as,7ar)-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1C=CC[C@@H]2C(=O)OC(=O)[C@@H]21 KMOUUZVZFBCRAM-OLQVQODUSA-N 0.000 claims description 4
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 230000009545 invasion Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000012945 sealing adhesive Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 17
- 210000001503 joint Anatomy 0.000 description 12
- 150000008064 anhydrides Chemical class 0.000 description 11
- 238000012360 testing method Methods 0.000 description 4
- 239000003607 modifier Substances 0.000 description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a rubber powder epoxy asphalt cement for an expansion joint, a prefabricated structure, a preparation method and application thereof, and the material comprises, by mass, 9-11 parts of matrix asphalt, 2-5 parts of epoxy resin, 2-5 parts of a curing component, 3-7 parts of rubber powder and 68-85 parts of mineral aggregate. The rubber powder, the epoxy resin and the epoxy resin curing agent are introduced into the matrix asphalt, so that the thermoplasticity of the asphalt can be changed, and the seamless expansion joint has excellent high-low temperature performance. The prefabricated seamless expansion joint structure is prepared by using the material, road construction is carried out, the expansion body component is prefabricated in a prefabricated field, installation and construction are carried out on site, large-scale equipment is not needed, maintenance and transportation are convenient, the construction time is short, and the construction cost is low. Meanwhile, the defects of long on-site paving and curing time and long sealing and transportation time of the epoxy asphalt mixture can be avoided.
Description
Technical Field
The invention discloses a rubber powder epoxy asphalt cement for an expansion joint, a prefabricated structure, a preparation method and application thereof, and relates to the field of seamless expansion joints of bridges.
Background
The bridge expansion joint is a non-negligible important component in the bridge structure, and is mainly arranged to meet the expansion deformation caused by temperature, humidity and the structure, so that the bridge deck is smooth and the driving is comfortable. Common bridge expansion joints are seamless, filled butt joint type, rubber plate type, steel supporting type, embedded butt joint type, modulus type and the like. Compared with other types of expansion joints, the seamless expansion joint is more suitable for small and medium-sized bridges with smaller deformation, can ensure the surface of the bridge to be smooth, and has the advantages of comfort in driving, low noise, convenience in construction, convenience in maintenance and the like.
The common seamless expansion joint material consists of high-dose asphalt and specific graded aggregate, but the high-dose asphalt can cause the expansion joint to generate rutting, oiling, pushing and other diseases in a high-temperature environment in summer and generate cracks and interface falling in a low-temperature environment in winter, so that the service life is low. To address this shortcoming, some patents incorporate rubber materials into the seamless expansion joint material, but do not fundamentally alter the thermoplastic properties of the asphalt material.
Through searching, the patent document of CN 101560332A discloses a high-viscosity high-elasticity asphalt and a preparation method thereof, wherein the high-viscosity high-elasticity asphalt consists of asphalt matrix, rubber powder, a styrene-butadiene-styrene block copolymer and sulfur. The patent document of CN 102718438A relates to a bridge seamless expansion joint material, which is prepared from mineral aggregate, rubber particles, mineral powder filler and cementing material, wherein the cementing material comprises the following components in percentage by mass: 65.0 to 75.0 percent of matrix asphalt, 20.0 to 25.0 percent of rubber powder and 5.0 to 10.0 percent of SBS modifier.
The epoxy curing system is introduced into the seamless expansion joint cementing material, so that the thermoplastic property of asphalt can be fundamentally changed, and the prepared rubber powder epoxy asphalt mixture has stronger rutting resistance and low-temperature deformation resistance and can be compatible with high-temperature and low-temperature properties.
The invention discloses a high-viscosity high-elastic asphalt for a seamless expansion joint, which comprises the following raw materials in parts by weight: 49-93 parts of matrix asphalt, 7-41 parts of additive, 2-21 parts of mineral powder fiber, 35-40 parts of graded broken stone, 0.2-14 parts of cross-linking agent, 5-10 parts of stabilizer and 1-5 parts of tackifying resin, wherein the additive comprises rubber powder, styrene-butadiene-styrene block copolymer, PE, epoxy resin, fiber and mineral powder, and the cross-linking agent comprises sulfur and natural asphalt. The patent adds the epoxy resin material but does not add the curing agent matched with the epoxy resin, and the epoxy resin phase can not form a continuous three-dimensional network, so that the expansion joint material can obtain thermosetting property.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a rubber powder epoxy asphalt mixture for an expansion joint, a prefabricated structure, a preparation method and application thereof, and aims at the following problems: firstly, the rubber powder epoxy asphalt material is used for solving the defects that the conventional high-modulus modified asphalt mixture has poor thermal stability and has the defects of rutting, oiling, pushing and the like at high temperature in summer; secondly, the prefabricated block is adopted, the telescopic body component is prefabricated in a prefabricated field, installation and construction are carried out on site, large-scale equipment is not needed, maintenance and transportation are convenient, the construction time is short, and the construction cost is low. Meanwhile, the defects of long on-site paving and curing time and long sealing and transportation time of the epoxy asphalt mixture can be avoided.
In order to achieve the technical purpose, the invention adopts the following technical scheme: the rubber powder epoxy asphalt cement for the expansion joint comprises, by mass, 9-11 parts of matrix asphalt, 2-5 parts of epoxy resin, 2-5 parts of a curing component, 3-7 parts of rubber powder and 68-85 parts of mineral aggregate.
Preferably, the epoxy resin is bisphenol A type E-51 epoxy resin, and the curing component is one of phthalic anhydride and tetrahydrophthalic anhydride curing agent.
Preferably, the rubber powder is waste tire rubber powder, and the particle size of the rubber powder is 20-30 meshes.
Preferably, the aggregate adopts single grading or intermittent grading, and the aggregate adopts single-stage timing, and the nominal particle size of the aggregate is 10-15 mm; when the intermittent grade is adopted, the nominal grain diameter of aggregate should be selected to be 5-10 mm, 10-15 mm and 15-20 mm.
Preferably, the aggregate is limestone aggregate or basalt aggregate.
The invention also provides a preparation method of the rubber powder epoxy asphalt mixture for the expansion joint, which is characterized in that: the preparation method of the rubber powder epoxy asphalt mixture comprises the following steps:
(1) Weighing matrix asphalt, epoxy resin, rubber powder and curing agent according to the mass percentage of each component;
(2) Heating matrix asphalt to 160-180 ℃, adding rubber powder in batches in the stirring process, stirring for 1h from 30min to complete addition, and controlling the temperature of the whole process to 160-180 ℃;
(3) Sequentially adding the curing component and the epoxy resin into the rubber powder asphalt, and synthesizing reactants at 140 ℃;
(4) And (3) placing the stirred sample under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 4000-6000 r/min to obtain the rubber powder epoxy asphalt cement.
The invention also provides a prefabricated seamless expansion joint structure prepared by the rubber powder epoxy asphalt cement for the expansion joint, which comprises the following steps:
(1) A proper amount of mineral aggregate, rubber powder epoxy asphalt cement meeting the requirement is reserved;
(2) Ensuring the normal operation of special equipment for epoxy asphalt, and heating the rubber powder epoxy asphalt cement to 120-140 ℃;
(3) Adding aggregate into a stirrer drying cylinder, aligning the opening of the stirrer drying cylinder with a thermal spray gun to heat the aggregate, wherein the heating temperature of the aggregate is 140-160 ℃, and monitoring the heating temperature of the stone by a handheld infrared thermometer on site;
(4) Starting special equipment for epoxy asphalt, continuously adding a specified amount of rubber powder epoxy asphalt cement into a stirrer and stirring until all stones are completely and uniformly wrapped, thus obtaining the rubber powder epoxy asphalt mixture suitable for the seamless expansion joints of the bridge;
(5) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture to ensure the strength of the prefabricated plate. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(6) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Preferably, the prefabricated block is preformed and cured in a prefabricated field, the width of the prefabricated block is 6-10 mm smaller than the size of an actual seamless expansion joint, and the plate length is 0.3-0.7m.
The invention also provides a construction method for preparing the prefabricated seamless expansion joint structure by using the rubber powder epoxy asphalt cement for the expansion joint, which is characterized by comprising the following steps of: filling the reserved slots of the expansion joints through rubber powder epoxy asphalt mixture precast blocks;
the rubber powder epoxy asphalt mixture precast block is placed in a reserved groove formed at the expansion joint, the precast block is horizontally and horizontally connected in a longitudinal direction along the reserved groove of the expansion joint, the joint is sealed with rubber powder epoxy asphalt cement coated at the bottom and two sides of the reserved groove, and meanwhile, the rubber powder epoxy asphalt cement can also play a role in bonding and fixing the rubber powder epoxy asphalt precast block; scraping glue powder epoxy asphalt cement on the surface of the expansion joint for sealing, spreading aggregate with the grain diameter of 3-5 mm, and rolling by a small road roller to ensure the flatness of the expansion joint and the surface skid resistance.
Preferably, the pre-groove cleaning comprises the steps of:
(1) Drawing lines on local uneven pavement at two sides of the expansion joint reserved groove, and then cutting;
(2) The uneven parts at the bottom and the groove wall of the reserved groove are leveled, and if large-area unevenness occurs or deeper depressions exist, the uneven parts are repaired and leveled by epoxy mortar;
(3) The caulking in the bridge seam or other sundries affecting the expansion and contraction of the bridge span are comprehensively cleaned;
the reserved groove sealing treatment comprises the following steps:
(1) Filling bridge joints;
the high-temperature-resistant foam pad and the like are used as blocking block materials to be plugged into the bridge joint, so that leakage of filling materials, corrosion of steel plates and invasion of water vapor are prevented;
(2) And (5) paving a steel plate.
Selecting steel plates for paving bridge joints, and welding L-shaped smooth round steel bars with the diameter of 10mm and the length of 150mm at intervals of 300mm below the steel plates for fixing the steel plates and the blocking blocks;
(3) Coating a filling material;
adding the rubber powder epoxy asphalt cement with sufficient weight into a hot melting kettle, and heating to 120-140 ℃; pouring the rubber powder epoxy asphalt cement into the tank bottom and covering the tank bottom, and manually scraping the epoxy asphalt cement at the tank bottom to be flat as soon as possible by using a scraping plate; simultaneously, both sides of the groove wall are coated with epoxy asphalt cement, and the whole groove bottom is completely sealed, so that no omission is ensured;
wherein, the prefabricated block installation and surface treatment comprises the following steps:
(1) Placing the rubber powder epoxy asphalt mixture precast block transported to the site in an expansion joint reserved groove;
(2) Horizontally and horizontally connecting the precast blocks along the longitudinal direction of the expansion joint reserved groove, and pouring rubber powder epoxy asphalt cement at the joint;
(3) Sticking two transparent adhesive tapes on the road surfaces at the two side edges of the expansion joint reserved groove, pouring the heated rubber powder epoxy asphalt cement on the groove surfaces and the two side adhesive tapes through a scraper box, carefully scraping and sealing the adhesive;
(4) Spreading aggregate with the particle size of 3-5 mm on the surface of the sealing glue, and rolling by a small road roller to ensure the surface skid resistance.
The beneficial effects are that:
according to the invention, the rubber powder, the epoxy resin and the epoxy resin curing agent are introduced into the matrix asphalt, so that the thermoplasticity of the asphalt can be changed, and the seamless expansion joint has excellent high-low temperature performance.
Detailed Description
Example 1
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 10 parts of 70# matrix asphalt, 3 parts of bisphenol A type E-51 epoxy resin, 2 parts of phthalic anhydride curing agent, 6 parts of 30-mesh waste tire rubber powder and 80 parts of basalt aggregate. Wherein, the aggregate adopts single grading.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 10 parts of 70# matrix asphalt, 3 parts of bisphenol A type E-51 epoxy resin, 2 parts of anhydride curing agent, 6 parts of 30-mesh waste tire rubber powder and 80 parts of single-grading basalt aggregate are weighed.
(2) Heating matrix asphalt to 160 ℃, adding waste tire rubber powder in batches in the stirring process, and stirring for 1h to prepare rubber powder asphalt;
(3) Bisphenol A type E-51 epoxy resin and anhydride curing agent are added into rubber powder asphalt, and reactants are synthesized at 140 ℃;
(4) And (3) placing the synthetic reactant under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 5000r/min to obtain the rubber powder epoxy asphalt cement.
(5) Heating the rubber powder epoxy asphalt cement to 140 ℃;
(7) Adding basalt aggregate with single grading with the nominal particle size of 10-15 mm into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun aiming at the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(8) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(9) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(10) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Example 2
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 11 parts of 70# matrix asphalt, 2 parts of bisphenol A type E-51 epoxy resin, 2 parts of tetrahydrophthalic anhydride curing agent, 5 parts of 20-mesh waste tire rubber powder and 76 parts of basalt aggregate. Wherein, the aggregate adopts gap grading.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 11 parts of 70# matrix asphalt, 2 parts of bisphenol A type E-51 epoxy resin, 2 parts of anhydride curing agent, 5 parts of 20 waste tire rubber powder and 76 parts of gap grading basalt aggregate are weighed.
(2) Heating matrix asphalt to 160 ℃, adding waste tire rubber powder in batches in the stirring process, and stirring for 1h to prepare rubber powder asphalt;
(3) Bisphenol A type E-51 epoxy resin and anhydride curing agent are added into rubber powder asphalt, and reactants are synthesized at 140 ℃;
(4) And (3) placing the synthetic reactant under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 5000r/min to obtain the rubber powder epoxy asphalt cement.
(5) Heating the rubber powder epoxy asphalt cement to 140 ℃;
(7) Adding basalt aggregate with nominal grain size of 5-10 mm, 10-15 mm and 15-20 mm and gap grading into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun to align with the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(8) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(9) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(10) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Example 3
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 11 parts of 70# matrix asphalt, 2 parts of bisphenol A type E-51 epoxy resin, 2 parts of phthalic anhydride curing agent, 3 parts of 20-mesh waste tire rubber powder and 85 parts of limestone aggregate. Wherein, the aggregate adopts gap grading.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 11 parts of 70# matrix asphalt, 2 parts of bisphenol A type E-51 epoxy resin, 2 parts of acid curing agent, 3 parts of 20-mesh waste tire rubber powder and 85 parts of gap-graded limestone aggregate are weighed.
(2) Heating matrix asphalt to 160 ℃, adding waste tire rubber powder in batches in the stirring process, and stirring for 1h to prepare rubber powder asphalt;
(3) Bisphenol A type E-51 epoxy resin and anhydride curing agent are added into rubber powder asphalt, and reactants are synthesized at 140 ℃;
(4) And (3) placing the synthetic reactant under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 5000r/min to obtain the rubber powder epoxy asphalt cement.
(5) Heating the rubber powder epoxy asphalt cement to 140 ℃;
(7) Adding lime aggregate with nominal grain size of 5-10 mm, 10-15 mm and 15-20 mm and gap grading into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun aiming at the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(8) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(9) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(10) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Example 4
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 9 parts of 70# matrix asphalt, 3 parts of bisphenol A type E-51 epoxy resin, 3 parts of tetrahydrophthalic anhydride curing agent, 4 parts of 30-mesh waste tire rubber powder and 75 parts of single-grading basalt aggregate. Wherein, the aggregate adopts single grading.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 9 parts of 70# matrix asphalt, 3 parts of bisphenol A type E-51 epoxy resin, 3 parts of anhydride curing agent, 4 parts of 30-mesh waste tire rubber powder and 75 parts of single-grading basalt aggregate are weighed.
(2) Heating matrix asphalt to 160 ℃, adding waste tire rubber powder in batches in the stirring process, and stirring for 1h to prepare rubber powder asphalt;
(3) Bisphenol A type E-51 epoxy resin and anhydride curing agent are added into rubber powder asphalt, and reactants are synthesized at 140 ℃;
(4) And (3) placing the synthetic reactant under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 5000r/min to obtain the rubber powder epoxy asphalt cement.
(5) Heating the rubber powder epoxy asphalt cement to 140 ℃;
(7) Adding basalt aggregate with single grading with the nominal particle size of 10-15 mm into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun aiming at the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(8) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(9) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(10) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Example 5
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 9 parts of 70# matrix asphalt, 5 parts of bisphenol A type E-51 epoxy resin, 5 parts of phthalic anhydride curing agent, 7 parts of 30-mesh waste tire rubber powder and 68 parts of gap grading basalt aggregate. Wherein, the aggregate adopts gap grading.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 9 parts of 70# matrix asphalt, 5 parts of bisphenol A type E-51 epoxy resin, 5 parts of anhydride curing agent, 7 parts of 30-mesh waste tire rubber powder and 68 parts of gap grading basalt aggregate are weighed.
(2) Heating matrix asphalt to 160 ℃, adding waste tire rubber powder in batches in the stirring process, and stirring for 1h to prepare rubber powder asphalt;
(3) Bisphenol A type E-51 epoxy resin and anhydride curing agent are added into rubber powder asphalt, and reactants are synthesized at 140 ℃;
(4) And (3) placing the synthetic reactant under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 5000r/min to obtain the rubber powder epoxy asphalt cement.
(5) Heating the rubber powder epoxy asphalt cement to 140 ℃;
(7) Adding basalt aggregate with nominal grain size of 5-10 mm, 10-15 mm and 15-20 mm and gap grading into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun to align with the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(8) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(9) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(10) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Comparative example 1
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 9 parts of 70# matrix asphalt, 0 part of bisphenol A type E-51 epoxy resin, 0 part of phthalic anhydride curing agent, 0 part of junked tire rubber powder and 68 parts of basalt aggregate. Wherein, the aggregate adopts gap grading.
This comparative example is substantially the same as example 5 except that no epoxy resin, modifier, and gum powder are added to the material.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 9 parts of 70# matrix asphalt and 68 parts of gap grading basalt aggregate are weighed.
(2) The matrix pitch was heated to 160 ℃.
(3) Adding basalt aggregate with nominal grain size of 5-10 mm, 10-15 mm and 15-20 mm and gap grading into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun to align with the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(4) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(5) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(6) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Comparative example 2
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 9 parts of 70# matrix asphalt, 0 part of bisphenol A type E-51 epoxy resin, 0 part of phthalic anhydride curing agent, 7 parts of 30-mesh waste tire rubber powder and 68 parts of basalt aggregate. Wherein, the aggregate adopts gap grading.
This comparative example is substantially the same as example 5, except that no epoxy resin, modifier, or the like was added to the material.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 9 parts of 70# matrix asphalt and 68 parts of gap grading basalt aggregate are weighed.
(2) Heating matrix asphalt to 160 ℃, adding waste tire rubber powder in batches in the stirring process, and stirring for 1h to prepare rubber powder asphalt;
(3) Heating the rubber powder asphalt to 140 ℃;
(4) Adding basalt aggregate with nominal grain size of 5-10 mm, 10-15 mm and 15-20 mm and gap grading into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun to align with the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(5) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(6) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(7) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
Comparative example 3
The rubber powder epoxy asphalt bridge seamless expansion joint material comprises the following components in parts by mass: 9 parts of 70# matrix asphalt, 5 parts of bisphenol A type E-51 epoxy resin, 5 parts of phthalic anhydride curing agent, 0 part of 30-mesh waste tire rubber powder and 68 parts of basalt aggregate. Wherein, the aggregate adopts gap grading.
This comparative example is essentially the same as example 5, except that no gum powder is present in the material.
The preparation method of the rubber powder epoxy asphalt mixture for the expansion joint comprises the following steps:
(1) 9 parts of 70# matrix asphalt, 5 parts of bisphenol A type E-51 epoxy resin, 5 parts of anhydride curing agent and 68 parts of gap grading basalt aggregate are weighed.
(2) Heating the matrix asphalt to 140 ℃;
(3) Bisphenol A type E-51 epoxy resin and anhydride curing agent are added into matrix asphalt, and reactants are synthesized at 140 ℃;
(4) And (3) placing the synthetic reactant under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 5000r/min to obtain the epoxy asphalt cement.
(5) Heating the epoxy asphalt cement to 140 ℃;
(6) Adding basalt aggregate with nominal grain size of 5-10 mm, 10-15 mm and 15-20 mm and gap grading into a stirrer drying cylinder, and heating the aggregate by using a thermal spray gun to align with the opening of the rotating stirrer drying cylinder to enable the temperature of the aggregate to reach 160 ℃;
(7) Starting special equipment for epoxy asphalt, continuously adding the rubber powder epoxy asphalt cement into a stirrer and stirring to obtain a rubber powder epoxy asphalt mixture;
(8) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(9) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
The high-temperature stability and the low-temperature crack resistance of the seamless expansion joint materials of the embodiments 1 to 5 and the comparative example 1 are tested, and a high-temperature rutting test and a low-temperature three-point bending test are respectively adopted as important indexes for controlling the performance of the expansion joint materials; test criteria the test results of examples 1-5 and comparative examples 1-3 are set forth in tables 1 and 2 with reference to highway engineering asphalt and asphalt mixture test procedure (JTG E20-2011). Wherein, the smaller the rutting depth is, the larger the dynamic stability is, which indicates that the higher the high temperature performance of the material is; the higher the flexural tensile strength and flexural tensile strain, the better the low temperature energy of the material.
TABLE 1 results of high temperature Performance test
| Examples | Rut depth (mm) | Dynamic stability (times/mm) |
| Example 1 | 0.960 | 6563 |
| Example 2 | 1.010 | 5206 |
| Example 3 | 1.235 | 4706 |
| Example 4 | 0.824 | 7403 |
| Example 5 | 0.342 | 16153 |
| Comparative example 1 | 3.458 | 1240 |
| Comparative example 2 | 2.486 | 1960 |
| Comparative example 3 | 0.526 | 9800 |
TABLE 2 Low temperature Performance test results
| Examples | Flexural tensile Strength (MPa) | Bending strain (mu epsilon) |
| Example 1 | 6.84 | 4800 |
| Example 2 | 7.54 | 5670 |
| Example 3 | 5.37 | 3507 |
| Example 4 | 7.84 | 5100 |
| Example 5 | 8.34 | 6880 |
| Comparative example 1 | 2.26 | 1273 |
| Comparative example 2 | 6.72 | 3404 |
| Comparative example 3 | 4.26 | 2340 |
The maximum contents of epoxy resin, curing component and rubber powder in example 5, the minimum rutting depth, the maximum dynamic stability, and the maximum flexural tensile strength and flexural tensile strain, show that the epoxy resin, curing component and rubber powder have optimal high-temperature performance and low-temperature performance. The epoxy, curing component, and powder contents of example 3 were the least, the greatest rutting depth, the least dynamic stability, the least flexural tensile strength and strain, and the worst high and low temperature performance among all examples. The high temperature performance and low temperature performance of examples 1, 2, 4 are at intermediate levels of all examples. Comparative example 1, in which no epoxy resin, curing agent and rubber powder were added, had much lower high temperature and low temperature properties than examples 1-5; in comparative example 2, epoxy resin and curing agent are not added, but rubber powder is added, so that the high-temperature performance of the adhesive is far lower than that of examples 1-5, but the low-temperature performance is improved; in comparative example 3, no rubber powder was added, but epoxy resin and curing agent were added, and its low temperature performance was lower than in examples 1 to 5, but its high temperature performance was improved. The epoxy resin and the curing component can improve the high-temperature performance of the material, and the addition of the rubber powder can obviously improve the low-temperature performance of the material, so that the material has excellent high-temperature and low-temperature performance under the combined action of the epoxy resin and the curing component.
The invention relates to a rubber powder epoxy asphalt prefabricated seamless expansion joint structure and an on-site implementation method. The rubber powder epoxy asphalt prefabricated seamless expansion joint structure uses a rubber powder epoxy asphalt mixture prefabricated block to fill an expansion joint reserved groove, and uses rubber powder epoxy asphalt cementing material to seal the longitudinal connection joint of the prefabricated block, the bottom of the reserved groove, the two sides and the expansion joint surface. The prefabricated block material adopts rubber powder epoxy asphalt mixture, and consists of the following materials in parts by weight: 9-11 parts of matrix asphalt, 2-5 parts of epoxy resin, 2-5 parts of curing component, 3-7 parts of rubber powder and 68-85 parts of mineral aggregate. The preparation of the seamless expansion joint structural material comprises the steps of preparation of rubber powder epoxy asphalt cement, molding of a rubber powder epoxy asphalt mixture precast block, health maintenance and the like. The method for implementing the seamless expansion joint structure on site comprises the steps of cleaning a reserved groove, sealing the reserved groove, installing a precast block, performing surface treatment and the like.
The construction of the seamless expansion joint is generally to firstly open the expansion joint on site, spread and compact the joint filling mixture, and more auxiliary tools such as a stirrer, a vibration road press and the like are needed, so that the site is complex, and more labor is needed. In the later maintenance and repair process, when a part of the seamless expansion joint needs to be repaired and replaced, the replacement operation is difficult. The prefabricated parts are adopted in the seamless expansion joints, so that the stability of quality and the unification of size can be ensured, the prefabricated blocks are used for installation operation on site, the construction flow is simplified, the requirement on large-scale construction machines is reduced, and the operation is simple and flexible. The precast blocks are used at the joints, so that the subsequent maintenance and replacement are convenient, and the maintenance time, material and labor cost can be reduced.
The rubber powder epoxy asphalt prefabricated seamless expansion joint structure introduces an epoxy curing system into the material, so that the thermosetting property of asphalt can be fundamentally changed, and the seamless expansion joint structure has stronger rutting resistance and low-temperature deformation performance, and gives consideration to high-temperature and low-temperature use environments. The prefabricated block of the epoxy asphalt mixture is prefabricated in a prefabricated field, so that the stability of quality and the unification of size can be ensured, the prefabricated block is used for installation operation on site, the construction flow is simplified, the requirement on large-scale construction machines is reduced, and the operation is simple and flexible. The precast blocks are used at the joints, so that the subsequent maintenance and replacement are convenient, and the maintenance time, material and labor cost can be reduced.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (8)
1. The rubber powder epoxy asphalt mixture for the expansion joint is characterized in that: the asphalt comprises, by mass, 9-11 parts of matrix asphalt, 2-5 parts of epoxy resin, 2-5 parts of a curing component, 3-7 parts of rubber powder and 68-85 parts of mineral aggregates.
2. The rubber powder epoxy asphalt mixture for expansion joints according to claim 1, wherein: the epoxy resin is bisphenol A type E-51 epoxy resin, and the curing component is one of phthalic anhydride and tetrahydrophthalic anhydride curing agent.
3. The rubber powder epoxy asphalt mixture for expansion joints according to claim 1, wherein: the rubber powder is waste tire rubber powder, and the particle size of the rubber powder is 20-30 meshes.
4. The rubber powder epoxy asphalt mixture for expansion joints according to claim 1, wherein: the mineral aggregate adopts single grading or intermittent grading, the aggregate adopts single-stage timing, and the nominal particle size of the aggregate is 10-15 mm; when the intermittent grade is adopted, the nominal particle size of the aggregate is selected to be 5-10 mm, 10-15 mm and 15-20 mm.
5. The rubber powder epoxy asphalt mixture for expansion joints according to claim 1, wherein: the mineral aggregate adopts basalt or limestone.
6. The method for preparing the rubber powder epoxy asphalt mixture for the expansion joint according to any one of claims 1 to 5, wherein the preparation of the rubber powder epoxy asphalt mixture comprises the following steps:
(1) Weighing matrix asphalt, epoxy resin, rubber powder and curing agent according to the mass percentage of each component;
(2) Heating matrix asphalt to 160-180 ℃, adding rubber powder in batches in the stirring process, stirring for 1h from 30min to complete addition, and controlling the temperature of the whole process to 160-180 ℃;
(3) Sequentially adding the curing component and the epoxy resin into the rubber powder asphalt, and synthesizing reactants at 140 ℃;
(4) And (3) placing the stirred sample under a high-speed shearing instrument, and shearing for 1h at the temperature of 160-180 ℃ at the shearing speed of 4000-6000 r/min to obtain the rubber powder epoxy asphalt cement.
(5) A proper amount of limestone or basalt mineral ore material with single grading or intermittent grading and rubber powder epoxy asphalt cement are used for standby. When single grading is selected, the nominal grain diameter of the aggregate is 10-15 mm; when the intermittent grade is adopted, the nominal particle size of the aggregate is selected to be 5-10 mm, 10-15 mm and 15-20 mm.
(6) Ensuring the normal operation of special equipment for epoxy asphalt, and heating the rubber powder epoxy asphalt cement to 120-140 ℃;
(7) Adding mineral aggregate into a stirrer drying cylinder, aligning a thermal spray gun with an opening of the rotating stirrer drying cylinder to heat the aggregate, wherein the heating temperature of the aggregate is 140-160 ℃, and monitoring the heating temperature of the stone by using a handheld infrared thermometer on site;
(8) Starting special equipment for epoxy asphalt, continuously adding a specified amount of rubber powder epoxy asphalt cement into a stirrer and stirring until all mineral aggregates are completely and uniformly wrapped, thus obtaining the rubber powder epoxy asphalt mixture suitable for the seamless expansion joints of the bridge;
(9) Pouring the rubber powder epoxy asphalt mixture into a prefabricated template, and vibrating and compacting the mixture to ensure the strength of the prefabricated plate. After pouring, firstly leveling the concrete surface by using a leveling plate manually, and then leveling by using a vibrating machine to realize a uniform and smooth surface;
(10) And (3) carrying out health maintenance on the poured mixture, and carrying out demoulding treatment after the health maintenance is finished.
7. The prefabricated seamless telescopic precast block prepared by the rubber powder epoxy asphalt mixture for the expansion joint according to claim 6, which is characterized in that: the prefabricated block is preformed and cured in a prefabricated field, the width of the prefabricated block is 6-10 mm smaller than the size of an actual seamless expansion joint, and the plate length is 0.3-0.7m.
8. The construction method for preparing the prefabricated seamless expansion joint structure by using the rubber powder epoxy asphalt cement for the expansion joint according to claim 7, which is characterized by comprising the following steps: the field implementation method comprises the steps of reserved groove cleaning, reserved groove sealing, precast block installation, surface treatment and the like.
Wherein the reservation cleaning comprises the following steps:
(1) Drawing lines on local uneven pavement at two sides of the expansion joint reserved groove, and then cutting;
(2) The uneven parts at the bottom and the groove wall of the reserved groove are leveled, and if large-area unevenness occurs or deeper depressions exist, the uneven parts are repaired and leveled by epoxy mortar;
(3) The caulking in the bridge seam or other sundries affecting the expansion and contraction of the bridge span are comprehensively cleaned;
the reserved groove sealing treatment comprises the following steps:
(1) Filling bridge joints;
the high-temperature-resistant foam pad and the like are used as blocking block materials to be plugged into the bridge joint, so that leakage of filling materials, corrosion of steel plates and invasion of water vapor are prevented;
(2) And (5) paving a steel plate.
Selecting steel plates for paving bridge joints, and welding L-shaped smooth round steel bars with the diameter of 10mm and the length of 150mm at intervals of 300mm below the steel plates for fixing the steel plates and the blocking blocks;
(3) Coating a filling material;
adding a rubber powder epoxy asphalt cement with enough weight into a hot melting kettle, and heating to 120-140 ℃; pouring the rubber powder epoxy asphalt cement into the tank bottom and covering the tank bottom, and manually scraping the epoxy asphalt cement at the tank bottom to be flat as soon as possible by using a scraping plate; simultaneously, both sides of the groove wall are coated with epoxy asphalt cement, and the whole groove bottom is completely sealed, so that no omission is ensured;
the prefabricated block installation and surface treatment comprise the following steps:
(1) Placing the rubber powder epoxy asphalt mixture precast block transported to the site in an expansion joint reserved groove;
(2) Horizontally and horizontally connecting the precast blocks along the longitudinal direction of the expansion joint reserved groove, and pouring rubber powder epoxy asphalt cement at the joint;
(3) Sticking two transparent adhesive tapes on the road surfaces at the two side edges of the expansion joint reserved groove, pouring the heated rubber powder epoxy asphalt cement on the groove surfaces and the two side adhesive tapes through a scraper box, carefully scraping and sealing the adhesive;
(4) Spreading aggregate with the particle size of 3-5 mm on the surface of the sealing adhesive, and rolling by a small road roller to ensure the surface skid resistance.
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