CN104652269A - Bridge deck pavement structure for orthotropic steel bridge - Google Patents
Bridge deck pavement structure for orthotropic steel bridge Download PDFInfo
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- CN104652269A CN104652269A CN201510072707.8A CN201510072707A CN104652269A CN 104652269 A CN104652269 A CN 104652269A CN 201510072707 A CN201510072707 A CN 201510072707A CN 104652269 A CN104652269 A CN 104652269A
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- hot melt
- asphalt
- modified asphalt
- particle
- high elasticity
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- 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
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a bridge deck pavement structure for an orthotropic steel bridge. The pavement structure comprises a mica-containing epoxy anti-corrosion layer, a solvent-free epoxy resin water-proof layer, a hot melt particle bonding layer, a high-elasticity modified asphalt pavement lower layer, a modified emulsified asphalt bonding layer and a high-elasticity modified asphalt pavement upper layer from bottom to top, wherein the total pavement thickness is 6-8 centimeters; the hot melt particles are high-polymer particles of which the softening point is greater than 150 DEG C; the high-elasticity modified asphalt is modified asphalt of which the elastic recovery is over 95 percent at 25 DEG C; the pavement lower layer is formed by paving a fine-particle asphalt mixture prepared by mixing the high-elasticity modified asphalt with a mineral mixture; the pavement upper layer is formed by paving a fine-particle or medium-particle asphalt mixture prepared by mixing the high-elasticity modified asphalt with the mineral mixture. By adopting the pavement structure, the water-proof layer and the asphalt pavement layer are combined integrally through the hot melt particle bonding layer, so that the shearing strength and durability of the pavement structure are ensured.
Description
Technical field
The present invention relates to Communication and Transportation Engineering field, especially relate to a kind of deck installation structure of orthotropic plate.
Background technology
Paving steel bridge deck is laid on steel bridge deck, and rise and protect steel plate and the individual layer or the double-layer structural thing that ensure running car requirement, thickness is about 40-80mm.It is generally made up of antirust coat, water-proof tack coat, pave-load layer etc.Carry at traffic load, wind, under the composite factor impact such as variations in temperature and Steel Bridge Deck local distortion, its force and deformation, far beyond pavement of road or airfield pavement complexity, thus all has requirements at the higher level to its intensity, deformation characteristic, temperature stability, fatigue durability etc.Simultaneously due to residing specific position of mating formation, functional performance proposes again lightweight, caking property is high, the particular/special requirement such as waterproof.As the important component part of bridge vehicle-driving, the quality of deck paving directly has influence on the safety of driving, comfortableness, bridge durability.
Paving steel bridge deck technical research is a global problem, and deck paving service condition is abnormal harsh, and it is to high-temperature stability, antifatigue cracking behavior, and to the following of steel plate deformed, layers cementing and guarded drainage performance etc. all have high requirement.In existing bridge deck pavement structure, in order to ensure the performance of pave-load layer, normal employing water-proof binding system, common water-proof bond material has: solvent-borne type asphalt rubber binding material (GS), bituminous epoxy cementing agent (DER) and epoxy bond material (EA) etc.Solvent-borne type asphalt rubber binding material (GS) also exist lack transition zone, (50-60 DEG C) and the problem such as steel plate adhesion strength is low under higher temperature; Bituminous epoxy cementing agent (DER) has the advantages such as the strong and response to temperature of adhesion stress is low, but uncured before pouring asphalt concrete construction, and transport vehicle and paver are difficult to walk, and pave difficulty; Epoxy resin (EA) the system non-refractory of normal temperature cure, although can with steel plate secure bond, not easily bond with pave-load layer interface, also there is the problem of toughness of material deficiency simultaneously.
Current material of paving course generally adopts stone mastic asphalt (SMA), in order to meet the pavement performance of pave-load layer better, usually carries out modification to pitch SMA.But modified asphalt SMA mixture viscosity is lower, cause anti-shear concrete ability inadequate, easily occur the phenomenons such as passing, be difficult to meet the requirement of paving steel bridge deck to compound high-temperature behavior and fatigue deformation; Although high viscosity modification SMA mixture overcomes the weakness of thermostability deficiency, but the viscosity under service temperature causes difficulty of construction significantly to increase with not mating of the viscosity at production and construction temperature, and conventional measure at present improves degree of compaction many means as improved mixture temperature, vibroroller cmpacting etc. all exist the defect affecting binder, mixture quality, cause interior design index cannot be able to perfect embodiment in pavement construction.
From paving process angle, current paving steel bridge deck mainly concentrates on epoxy asphalt pavement or pouring asphalt and to mat formation two kinds of techniques.But these two kinds of techniques are very imperfect yet, wherein epoxy asphalt pavement difficulty of construction is large, and temperature controls harsh, is difficult to operation, and material stiffness is large simultaneously, and problem of Cracking is comparatively difficult to resolve certainly, and surperficial skid resistance is poor, and late maintaining difficulty is large; Cast asphalt is mated formation employing special equipment, more difficultly applies, especially small bridge, and material rutting resistance is poor.And the material of these two kinds of paving process, cost are high, in practice of construction there are some problems in difficulty, is difficult to apply on steel bridge.
Therefore, be necessary to develop a kind of material, cost is low, construction highly versatile, and high-temperature stability, antifatigue cracking behavior and the paving structure good to Steel plate bridge deformation compliance.
Summary of the invention
Technical problem to be solved by this invention is that the Surfacing Construction difficulty overcoming existing orthotropic plate is large, initial stage drops into high, late maintaining maintenance cost is high, with existing water-proof binding system non-refractory, toughness is not enough, can not with steel plate surface and pave-load layer secure bond, and paving structure can not meet the defect to the requirement of high-temperature stability, low-temperature deformation ability and antifatigue cracking in use procedure well, provides a kind of deck installation structure and paving method of orthotropic plate.The deck paving of orthotropic plate of the present invention greatly reduces difficulty of construction, initial stage drops into and reduces 20-30%, late maintaining maintenance easily, the versatility of pavement technique is stronger, and substructure of mating formation is durable, the life-span is long, daily can only effects on surface maintenance, avoid entirety and repeat maintenance, in life cycle management, save input.
The invention provides a kind of deck installation structure of orthotropic plate, described paving structure comprises one from bottom to top and to mat formation upper strata containing mat formation lower floor, modified mulseal tack coat and a high elasticity modified asphalt of mica epoxy anticorrosive coat, a solvent-free epoxy resin waterproofing course, a hot melt particle bond layer, a high elasticity modified asphalt, and total pavement thickness is 6-8cm;
Described hot melt particle is the polymeric particles that softening point is greater than 150 DEG C;
Described high elasticity modified asphalt is that elasticity recovers to be greater than the modified bitumen of 95% at 25 DEG C;
Described high elasticity modified asphalt lower floor of mating formation is made up of following method: by described high elasticity modified asphalt and Mineral Aggregate mix, make particulate formula bituminous mixture, then mat formation;
Described high elasticity modified asphalt upper strata of mating formation is made up of following method: by described high elasticity modified asphalt and Mineral Aggregate mix, make particulate formula or middle grain formula bituminous mixture, then mat formation.
Wherein, described paving structure is preferably laid on steel bridge deck, and described steel bridge deck carries out processing of rust removing according to this area routine before mating formation, and preferably through derusting by sandblasting process, described derusting by sandblasting is treated to this area routine operation.
Wherein, described particulate formula bituminous mixture is term of art, and it is 13.2mm or 16mm that particulate formula wherein refers to maximum particle diameter, and nominal maximum particle diameter is 9.5mm or 13.2mm.Described middle grain formula bituminous mixture is term of art, and it is 19mm or 26.5mm that middle grain formula wherein refers to maximum particle diameter, and nominal maximum particle diameter is 16mm or 19mm.
Wherein, the described mica epoxy anticorrosive coat that contains being made up of the containing mica epoxy resin roller coating of this area routine use.Described is preferably provided by west card (China) Co., Ltd containing mica epoxy resin, product type is SikaCor HM Primer, the main component of described SikaCor HM Primer is epoxy resin (644 type), and submember is the polymer of bisphenol-A and oxirane.Described preferably meets following index containing mica epoxy anticorrosive coat: unit square rice is 0.3-0.4kg containing the quality of mica epoxy resin.The described build containing mica epoxy anticorrosive coat is preferably 60-80 μm.
Wherein, the solvent-free epoxy resin in described solvent-free epoxy resin waterproofing course is the solvent-free epoxy resin that this area routine uses, and is preferably the western solvent-free epoxy resin blocking (China) Co., Ltd and provide.Described solvent-free epoxy resin waterproofing course preferably meets following index: the quality of unit square rice solvent-free epoxy resin is 2.0-3.0kg.The build of described solvent-free epoxy resin waterproofing course is preferably 1.0-1.8mm.
Wherein, the hot melt particle in described hot melt particle bond layer can melt under the high temperature action of bituminous mixture, plays the function of bond capacity and asphalt mixture surfacing.The particle diameter of described hot melt particle is preferably 1.5-4mm, and average grain diameter is preferably 2mm.Described hot melt particle can be formed by macromolecule resin and/or copolymer melting mixing, is preferably formed by ethylene-vinyl acetate copolymer and styrene resin melting mixing, and described melting mixing is this area routine operation.Wherein, in described ethylene-vinyl acetate copolymer and styrene resin melting mixing, the mass ratio of ethylene-vinyl acetate copolymer and styrene resin is preferably 99:1-60:40, described ethylene-vinyl acetate copolymer is the ethylene-vinyl acetate copolymer that this area routine uses, and molecular formula is (C
2h
4)
x(C
4h
6o
2)
ythe molecular weight of described ethylene-vinyl acetate copolymer is preferably 1500-4000, described ethylene-vinyl acetate copolymer is more preferably the ethylene-vinyl acetate copolymer of the trade mark 9F1 of SINOPEC Beijing Yanshan Company's production, described styrene resin is the styrene number fat that this area routine uses, the molecular weight of described styrene resin is preferably 80-300, and described styrene resin is more preferably the styrene resin of the trade mark 275 of SINOPEC Shanghai Gaoqiao Petrochemical Corporation's production.Described hot melt particle bond layer preferably meets following index: the quality of unit square rice hot melt particle is 0.6-1.0kg, more preferably meets following index: the quality of unit square rice hot melt particle is 0.8-1.0kg.
Wherein, described high elasticity modified asphalt mats formation the thickness of lower floor preferably for 2.5-4mm.Described particulate formula bituminous mixture preferably adopts SMA-10 or AC-10F grating, and void content preferably controls at 2.5-3.5%.Those skilled in the art according to lower floor of mating formation thickness according to gather materials and grating can select the consumption of unit square rice particulate formula bituminous mixture.For avoiding or reducing infiltration, strengthen waterproof action of mating formation further, when the particulate formula bituminous mixture of mating formation described, material construction temperature is preferably greater than 170 DEG C, to make described hot melt particle melt, forms entirety with described particulate formula bituminous mixture.
Wherein, the modified emulsifying asphalt in described modified emulsifying asphalt tack coat is the modified emulsifying asphalt that this area routine uses.Described modified emulsifying asphalt tack coat preferably meets following index: the quality of unit square rice modified emulsifying asphalt is 0.4-0.6kg.
Wherein, described high elasticity modified asphalt mats formation the thickness on upper strata preferably for 3.5-5cm.Described particulate formula or middle grain formula bituminous mixture preferably adopt SMA-13, SMA-16, OGFC-13 or OGFC-16 grating; Wherein, for SMA-13 or SMA-16 grating, void content preferably controls at 3-5%; For OGFC-13 or OGFC-16 grating, void content preferably controls at 18-22%.Those skilled in the art according to lower floor of mating formation thickness according to gather materials and grating can select the consumption of unit square rice particulate formula or middle grain formula bituminous mixture.
Described high elasticity modified asphalt is that high speed shear under high-speed shearing machine obtains by high resiliency modifier and No. 70 pitches, and the raw material of described high resiliency modifier preferably comprises following component by weight: styrene butadiene styrene block copolymer (SBS) (SBS) 100 parts, tackifier 20-40 part, softening agent 20-40 part, warm-mixing agent 3-8 part, plasticizing agent 15-40 part and stabilizing agent 2-6 part.
Wherein, SBS, tackifier, softening agent, warm-mixing agent, plasticizing agent and stabilizing agent are the component that this area routine uses, and all commercially.The number-average molecular weight of described SBS is preferably 80000 ~ 100000, and in described SBS, cinnamic content is preferably 20 ~ 40%, and the content of butadiene is preferably 60 ~ 80%; The model that described SBS more preferably produces for Balin Branch Corp. SINOPEC is the SBS of 791H.Described tackifier are preferably one or more in rubber powder, Petropols and coumarone indene resin, more preferably by rubber powder with Petropols are composite forms, or by rubber powder with coumarone indene resin is composite forms, described composite mass ratio is preferably (40 ~ 60): (40 ~ 60); Described rubber powder can be obtained by waste rubber goods ambient ground, and the order number of described rubber powder is preferably 40 ~ 80 orders; Described Petropols are generally thermoplastic resin, and be granular or blocks of solid, softening point is 90 ~ 140 DEG C, is preferably produced by PetroChina Lanzhou Petrochemical Company; Described coumarone indene resin is solid, and softening point is 90 ~ 135 DEG C, is preferably produced by Shandong Qi Bang resin Co., Ltd; Described softening agent is preferably furfural extract oil and/or naphthenic rubber oil, the arene content preferably >80% of described furfural extract oil and described naphthenic rubber oil; Described warm-mixing agent is preferably Tissuemat E, described Tissuemat E is a kind of mixture synthesizing straight-chain aliphatic hydrocarbon, long-chain fat hydrocarbon containing 40 ~ 120 carbon atoms, its fusing point is at about 100 DEG C, the high temperature viscosity of pitch can be reduced, improve the low temperature viscosity of pitch, preferably produced by Qingdao Sai Nuo new material Co., Ltd; Described plasticizing agent is preferably dioctyl phthalate and/or diethyl phthalate; Described stabilizing agent is preferably sulphur, and described sulphur is pale yellow powder, and the fineness of described sulphur is preferably 200 ~ 500 orders, and purity is >99% preferably.
Wherein, the preparation technology of described high resiliency modifier preferably carries out in the following manner: described tackifier, SBS and warm-mixing agent are mixed in high-speed mixing equipment by formula; Be uniformly mixed with described softening agent, stabilizing agent and plasticizing agent again, extruded by double screw extruder, pelletizing, extrusion temperature controls at 140-200 DEG C, after cooling and get final product.
The invention allows for a kind of paving method of deck installation structure of orthotropic plate, it comprises the steps:
(1) on a steel bridge deck, carry out derusting by sandblasting process, then contain mica epoxy anticorrosive coat at its external coating one;
(2) to described containing after the natural curing of mica epoxy anticorrosive coat, be coated with a solvent-free epoxy resin waterproofing course;
(3) spreading hot melt particle, makes its part be absorbed in described solvent-free epoxy resin waterproofing course, to form a hot melt particle bond layer;
(4) implement to mat formation particulate formula bituminous mixture, to mat formation lower floor to form a high elasticity modified asphalt;
(5) spreading modified emulsifying asphalt, to form modified mulseal tack coat;
(6) implement to mat formation particulate formula or middle grain formula bituminous mixture, to mat formation upper strata to form a high elasticity modified asphalt.
In step (1), described derusting by sandblasting is treated to this area routine operation, and the general shot-blast apparatus that adopts carries out.Described derusting by sandblasting process preferably makes steel bridge deck cleannes reach Sa2.5 level, and roughness reaches 60-100 μm.
In step (1), described preferably carries out application containing mica epoxy anticorrosive coat in the 4h completing described derusting by sandblasting, the artificial roller coating of general employing.The described model preferably provided by west card (China) Co., Ltd containing mica epoxy anticorrosive coat be SikaCor HM Primer contain that mica epoxy is resin-coated to be made.Described contains mica epoxy anticorrosive coat preferably according to 0.3-0.4kg/m
2carry out roller coating containing mica epoxy resin demand.The described build containing mica epoxy anticorrosive coat preferably reaches 60-80 μm.
In step (2), described natural curing is this area routine operation, and the time of described natural curing preferably reaches more than 24h.Described coating one solvent-free epoxy resin waterproofing course preferably adopts following manner to carry out: scraped off uniformly by solvent-free epoxy resin with band tooth scraper plate containing on mica epoxy anticorrosive coat, and then discharged by the air brought into when stirring with froth breaking cylinder.Described solvent-free epoxy resin waterproofing course is preferably according to 2.0-3.0kg/m
2solvent-free epoxy resin consumption be coated with.The build of described solvent-free epoxy resin waterproofing course is preferably 1.0-1.8mm.
In step (3), described spreading hot melt particle preferably carries out in the 30min being coated with solvent-free epoxy resin waterproofing course, and general employing is artificial or broadcast sowing mechanical spreading.Described spreading hot melt particle bond layer is preferably according to 0.6-1.0kg/m
2hot melt amount of particles carry out spreading, more preferably according to 0.8-1.0kg/m
2hot melt amount of particles carry out spreading.The whole state index of described spreading preferably makes the 40-60% of hot melt particle embed in uncured described solvent-free epoxy resin waterproofing course, 50% of hot melt particle is more preferably made to embed in uncured described solvent-free epoxy resin waterproofing course, the hot melt particle of remainder is then positioned on described solvent-free epoxy resin waterproofing course, melt under high temperature action when bituminous mixture laying, play the function of bond capacity and asphalt mixture surfacing.
In step (3), the particle diameter of described hot melt particle is preferably 1.5-4mm, and average grain diameter is preferably 2mm.Described hot melt particle can be formed by macromolecule resin and/or copolymer melting mixing, is preferably formed by ethylene-vinyl acetate copolymer and styrene resin melting mixing, and described melting mixing is this area routine operation.Wherein, in described ethylene-vinyl acetate copolymer and styrene resin melting mixing, the mass ratio of ethylene-vinyl acetate copolymer and styrene resin is preferably 99:1-60:40, described ethylene-vinyl acetate copolymer is the ethylene-vinyl acetate copolymer that this area routine uses, and molecular formula is (C
2h
4) x. (C
4h
6o
2) y, the molecular weight of described ethylene-vinyl acetate copolymer is preferably 1500-4000, described ethylene-vinyl acetate copolymer is more preferably the ethylene-vinyl acetate copolymer of the trade mark 9F1 of Sinopec Yanshan Petrochemical production, described styrene resin is the styrene number fat that this area routine uses, the molecular weight of described styrene resin is preferably 80-300, and described styrene resin is more preferably the styrene resin of the trade mark 275 of Sinopec Shanghai Gaoqiao petrochemical iy produced.
In step (4), described enforcement mat formation particulate formula bituminous mixture preferably solvent-free epoxy resin waterproofing course solidification 48h after carry out.Described particulate formula bituminous mixture preferably adopts SMA-10 or AC-10F grating, and void content preferably controls at 2.5-3.5%.Described high elasticity modified asphalt mats formation the thickness of lower floor preferably for 2.5-4cm.The mat formation on-the-spot paving material of lower floor of described high elasticity modified asphalt is preferably greater than 170 DEG C, to make described hot melt particle melt, forms entirety with described particulate formula bituminous mixture.
In step (5), described spreading modified emulsifying asphalt is preferably according to 0.4-0.6kg/m
2modified emulsifying asphalt consumption carry out spreading, described modified emulsifying asphalt plays bonding and to mat formation the function of upper strata and lower floor.
In step (6), described high elasticity modified asphalt mats formation the thickness on upper strata preferably for 3.5-5cm.Described particulate formula or middle grain formula bituminous mixture preferably adopt SMA-13, SMA-16, OGFC-13 or OGFC-16 grating; Wherein, for SMA-13 or SMA-16 grating, void content preferably controls at 3-5%; For OGFC-13 or OGFC-16 grating, void content preferably controls at 18-22%.
In the present invention, described molecular weight is number-average molecular weight.
On the basis meeting this area general knowledge, above-mentioned each optimum condition, can be combined, obtain the preferred embodiments of the invention.
Agents useful for same of the present invention and raw material are all commercially.
Positive progressive effect of the present invention is:
Adopt in the deck installation structure of 1, orthotropic plate of the present invention containing mica epoxy anticorrosive coat, its deformability, durability significantly will be better than epoxy zinc-rich paint conventional in the anticorrosion water-proof system of current deck paving.Under 25 DEG C of conditions, the pull strength containing mica epoxy anticorrosive coat and steel bridge deck is greater than 8MPa, far above code requirement.
Adopt solvent-free epoxy resin as waterproofing course in the deck installation structure of 2, orthotropic plate of the present invention, solve the waterproof problem of steel bridge pointedly, can avoid infiltration and shear failure occur, ensure waterproof, the adhesive property of substructure.Under 25 DEG C of conditions, solvent-free epoxy resin waterproofing course is greater than 6MPa with the pull strength containing mica epoxy anticorrosive coat.
3, the deck installation structure tack coat of orthotropic plate of the present invention adopts heat molten type particle, particle both better can bond with waterproofing course, melt under the high temperature action of hot-mix asphalt mixture simultaneously, combine together with bituminous mixture, by waterproofing course with asphalt mixture surfacing in conjunction with as a whole, slip between preventing layer and cracking, ensure the durability of waterproofing course.At 60 DEG C, hot melt particle bond layer, interlaminar shear strength is greater than 0.8MPa, much larger than other water-proof binding layer materials.
4, the bridge deck pavement of orthotropic plate of the present invention adopts high elasticity modified asphalt, the dynamic viscosity at 60 DEG C is improve compared with conventional pitch, reduce the dynamic viscosity at 135 DEG C, both Rut resistance was met, antifatigue, durable high-viscosity high-elasticity performance, turn improve construction workability, can effectively solve asphalt mixture surfacing Steel Bridge Deck distortion under chase after from capability problems, pave-load layer is followed Steel Bridge Deck distortion and does not ftracture, inhibit crack, the generation of the diseases such as passing, extend the application life of Steel Bridge Deck, not vibratory compaction can be realized on Steel Bridge Deck simultaneously, prevent because the resonate compacting inequality that causes of bridge floor causes infiltration to corrode bridge surface armor plate.Wherein, lower floor of mating formation adopts elastomeric particulate formula bituminous mixture, has good dense water, high-temperature stability, antifatigue cracking behavior and the following to steel plate deformed; Upper strata of mating formation adopts elastomeric particulate formula or middle grain formula bituminous mixture, has good heat stability, distortion retinue property and surperficial skid resistance, ensure that driving safety and comfortableness; Mating formation between upper strata and lower floor adopts modified emulsifying asphalt tack coat to ensure Coating combination.
5, the deck installation structure economy of orthotropic plate of the present invention is strong, and comparatively bituminous epoxy and pouring asphalt primary construction of mating formation drops into and reduces 20-30%, and later period maintenance cost is lower, and in life cycle management, economy is strong.
6, the deck paving method highly versatile of orthotropic plate of the present invention, mat formation and adopt relative conventional material, do not need to adopt special equipment, waterproofing course adopts conventional equipment construction, whole construction process is simple, workable, there is good construction workability, be applicable to all kinds of orthotropic plate deck paving.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the deck installation structure of the orthotropic plate of embodiment of the present invention 1-4.In figure, 1 to mat formation upper strata for high elasticity modified asphalt, and 2 is modified emulsifying asphalt tack coat, and 3 to mat formation lower floor for high elasticity modified asphalt, and 4 is hot melt particle bond layer, and 5 is solvent-free epoxy resin waterproofing course, and 6 for containing mica epoxy anticorrosive coat, and 7 is bridge surface armor plate.
Detailed description of the invention
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or selects according to catalogue.
In following embodiment, used is that west card (China) Co., Ltd provides containing the mica epoxy resin that contains in mica epoxy anticorrosive coat, and model is SikaCor HM Primer; Solvent-free epoxy resin used blocks (China) Co., Ltd for west to be provided, and model is SikaCor HM Mastic; Modified emulsifying asphalt used provides for Zhenhai Oil-Refining ChemicalCo., Ltd., China Petro-Chemical Corp, and model is PC-3.
Hot melt particle used is formed by ethylene-vinyl acetate copolymer and styrene resin melting mixing, ethylene-vinyl acetate copolymer is the ethylene-vinyl acetate copolymer of the trade mark 9F1 that SINOPEC Beijing Yanshan Company produces, and styrene resin is the styrene resin of the trade mark 275 that SINOPEC Shanghai Gaoqiao Petrochemical Corporation produces.
High resiliency bituminous mixture used is formed by high elasticity modified asphalt and Mineral Aggregate mix, wherein, by high resiliency modifier and No. 70 pitches, high speed shear under high-speed shearing machine obtains high elasticity modified asphalt, and high resiliency modifier used is prepared by following manner: by weight by 20-40 part tackifier (by granularity be 60 object rubber powders and Petropols in mass ratio 60:40 mix), 100 parts of styrene butadiene styrene block copolymer (SBS) (SBS) and 3-8 part warm-mixing agent (Tissuemat E) mix in high-speed mixing equipment; Be uniformly mixed with 20-40 part softening agent (furfural extract oil), 2-6 part stabilizing agent (sulphur) and 15-40 part plasticizing agent (dioctyl phthalate) again, extruded by double screw extruder, pelletizing, extrusion temperature controls at 140-200 DEG C, after cooling and get final product.
Embodiment 1
A paving method for the deck installation structure of orthotropic plate, comprises the steps:
(1) derusting by sandblasting on steel bridge deck, makes its cleannes reach Sa2.5 level, and roughness is 70 μm; According to 0.3kg/m
2containing mica epoxy resin demand, adopt artificial brushing roller coating one containing mica epoxy anticorrosive coat;
(2) after 24h is containing the solidification of mica epoxy anticorrosive coat, according to 2.5kg/m
2solvent-free epoxy resin consumption implement blade coating one solvent-free epoxy resin waterproofing course;
(3) complete in solvent-free epoxy resin waterproofing course 30min, according to 0.8kg/m
2consumption spreading hot melt particle, make its half be absorbed in solvent-free epoxy resin waterproofing course, to form a hot melt particle bond layer;
(4) after the solidification of 48h solvent-free epoxy resin waterproofing course, implement to mat formation the high resiliency bituminous mixture of lower floor SMA-10 grating, mixture gap rate is 3.0%, and material temperature is 175 DEG C, to mat formation lower floor to form high elasticity modified asphalt that a thickness is 3.0cm;
(5) according to 0.5kg/m
2consumption spreading modified emulsifying asphalt, to form modified mulseal tack coat;
(6) implement to mat formation the high resiliency bituminous mixture of upper strata SMA-13 grating, mixture gap rate is 4.0%, to mat formation upper strata to form high elasticity modified asphalt that a thickness is 4.0cm.
The deck installation structure of the orthotropic plate obtained by above-mentioned paving method as shown in Figure 1, comprise steel bridge deck 7 from bottom to top, containing mica epoxy anticorrosive coat 6, solvent-free epoxy resin waterproofing course 5, hot melt particle bond layer 4, high elasticity modified asphalt is mated formation lower floor 3, and modified emulsifying asphalt tack coat 2 and high elasticity modified asphalt are mated formation upper strata 1.
Embodiment 2
A paving method for the deck installation structure of orthotropic plate, comprises the steps:
(1) derusting by sandblasting on steel bridge deck, makes its cleannes reach Sa2.5 level, and roughness is 80 μm; According to 0.3kg/m
2containing mica epoxy resin demand, adopt artificial brushing roller coating one containing mica epoxy anticorrosive coat;
(2) after 24h is containing the solidification of mica epoxy anticorrosive coat, according to 3.0kg/m
2solvent-free epoxy resin consumption implement blade coating one solvent-free epoxy resin waterproofing course;
(3) complete in solvent-free epoxy resin waterproofing course 30min, according to 0.8kg/m
2consumption spreading hot melt particle, make its half be absorbed in solvent-free epoxy resin waterproofing course, to form a hot melt particle bond layer;
(4) after the solidification of 48h solvent-free epoxy resin waterproofing course, implement to mat formation the high resiliency bituminous mixture of lower floor AC-10F grating, mixture gap rate is 3.0%, and material temperature is 170 DEG C, to mat formation lower floor to form high elasticity modified asphalt that a thickness is 2.5cm;
(5) according to 0.5kg/m
2consumption spreading modified emulsifying asphalt, to form modified mulseal tack coat;
(6) implement to mat formation the high resiliency bituminous mixture of upper strata SMA-13 grating, mixture gap rate is 4.0%, to mat formation upper strata to form high elasticity modified asphalt that a thickness is 4.0cm.
The deck installation structure of the orthotropic plate obtained by above-mentioned paving method as shown in Figure 1, comprise steel bridge deck 7 from bottom to top, containing mica epoxy anticorrosive coat 6, solvent-free epoxy resin waterproofing course 5, hot melt particle bond layer 4, high elasticity modified asphalt is mated formation lower floor 3, and modified emulsifying asphalt tack coat 2 and high elasticity modified asphalt are mated formation upper strata 1.
Embodiment 3
A paving method for the deck installation structure of orthotropic plate, comprises the steps:
(1) derusting by sandblasting on steel bridge deck, makes its cleannes reach Sa2.5 level, and roughness is 80 μm; According to 0.4kg/m
2containing mica epoxy resin demand, adopt artificial brushing roller coating one containing mica epoxy anticorrosive coat;
(2) after 24h is containing the solidification of mica epoxy anticorrosive coat, according to 3.0kg/m
2solvent-free epoxy resin consumption implement blade coating one solvent-free epoxy resin waterproofing course;
(3) complete in solvent-free epoxy resin waterproofing course 30min, according to 1.0kg/m
2consumption spreading hot melt particle, make its half be absorbed in solvent-free epoxy resin waterproofing course, to form a hot melt particle bond layer;
(4) after the solidification of 48h solvent-free epoxy resin waterproofing course, implement to mat formation the high resiliency bituminous mixture of lower floor AC-10F grating, mixture gap rate is 3.5%, and material temperature is 170 DEG C, to mat formation lower floor to form high elasticity modified asphalt that a thickness is 3.0cm;
(5) according to 0.5kg/m
2consumption spreading modified emulsifying asphalt, to form modified mulseal tack coat;
(6) implement to mat formation the high resiliency bituminous mixture of upper strata OGFC-13 grating, mixture gap rate is 20%, to mat formation upper strata to form high elasticity modified asphalt that a thickness is 4.0cm.
The deck installation structure of the orthotropic plate obtained by above-mentioned paving method as shown in Figure 1, comprise steel bridge deck 7 from bottom to top, containing mica epoxy anticorrosive coat 6, solvent-free epoxy resin waterproofing course 5, hot melt particle bond layer 4, high elasticity modified asphalt is mated formation lower floor 3, and modified emulsifying asphalt tack coat 2 and high elasticity modified asphalt are mated formation upper strata 1.
Embodiment 4
A paving method for the deck installation structure of orthotropic plate, comprises the steps:
(1) derusting by sandblasting on steel bridge deck, makes its cleannes reach Sa2.5 level, and roughness is 80 μm; According to 0.4kg/m
2containing mica epoxy resin demand, adopt artificial brushing roller coating one containing mica epoxy anticorrosive coat;
(2) after 24h solidifies containing mica epoxy anticorrosive coat containing mica epoxy, according to 2.5kg/m
2solvent-free epoxy resin consumption implement blade coating one solvent-free epoxy resin waterproofing course;
(3) complete in solvent-free epoxy resin waterproofing course 30min, according to 1.0kg/m
2consumption spreading hot melt particle, make its half be absorbed in solvent-free epoxy resin waterproofing course, to form a hot melt particle bond layer;
(4) after the solidification of 48h solvent-free epoxy resin waterproofing course, implement to mat formation the high resiliency bituminous mixture of lower floor SMA-10 grating, mixture gap rate is 3.0%, and material temperature is 175 DEG C, to mat formation lower floor to form high elasticity modified asphalt that a thickness is 3.5cm;
(5) according to 0.5kg/m
2consumption spreading modified emulsifying asphalt, to form modified mulseal tack coat;
(6) implement to mat formation the high resiliency bituminous mixture of upper strata OGFC-16 grating, mixture gap rate is 22.0%, to mat formation upper strata to form high elasticity modified asphalt that a thickness is 4.0cm.
The deck installation structure of the orthotropic plate obtained by above-mentioned paving method as shown in Figure 1, comprise steel bridge deck 7 from bottom to top, containing mica epoxy anticorrosive coat 6, solvent-free epoxy resin waterproofing course 5, hot melt particle bond layer 4, high elasticity modified asphalt is mated formation lower floor 3, and modified emulsifying asphalt tack coat 2 and high elasticity modified asphalt are mated formation upper strata 1.
Effect example 1
Carry out pull-out test to the anticorrosive coat of embodiment 1 paving structure, pull-out test is with reference to " GB 5210-85 coating adhesion determination method pulls open method ", " GB/T 11211-1989 vulcanized rubber and metlbond strength detection method pulling method ".Pull-out test is chosen 5 parallel test specimens and is tested at 25 DEG C.
The pull-out test result of table 1 anticorrosive coat
Under 25 DEG C of conditions, the pull strength containing mica epoxy anticorrosive coat and steel bridge deck is greater than 8MPa, far above code requirement, also far above the test value of epoxy zinc-rich paint.The effect of embodiment 2-4 is with embodiment 1.
Effect example 2
Shear strength test is carried out to the waterproofing course of embodiment 1 paving structure, and choose at present conventional bituminous epoxy water-proof system and polymethyl methacrylate resin water-proof system as a control group, test method is with reference to " bridge water-repellent paint " (JC/T 975-2005).
Table 2 different preventing water layer system shear strength compares
This anticorrosion water-proof binding system improves shear strength at different temperatures, especially the shear strength of (60 DEG C and 70 DEG C) under high temperature.According to the service condition on opportunity of paving steel bridge deck, vehicle is when bridge floor travels to the horizontal shear force that tack coat applies, and worst situation is under high ambient conditions, and therefore the tack coat shear strength of 60 DEG C and 70 DEG C is very important.Result of the test shows, compares at present conventional bituminous epoxy system and polymethyl methacrylate resin system, and water-proof tack coat system high-temperature shear strength of the present invention has and significantly increases.Analyze wherein reason, hot melt particle changes physical shear key effect single between traditional waterproofing course and asphalt mixture surfacing effectively, is enhanced the shear strength of Steel Deck Pavement System by the effect of chemical bonding key.The effect of embodiment 2-4 is with embodiment 1.
Effect example 3
Pavement performance test is carried out to the high resiliency modification SMA-10 compound that embodiment 1 paving structure adopts, and choose common modifications SMA-10 compound as a control group, common modifications SMA-10 compound used is formed by the commercially available modified asphalt in China petroleum Chemicals Co., Ltd. Town Hai Lian Hua branched Corporation and ore compound mix.Method of testing is with reference to " highway engineering pitch and Asphalt Mixture Experiment code " (JTG E20-2011).
The pavement performance of table 3 high resiliency modification SMA-10 compound
Compare common modifications SMA-10 compound, the high-temperature behavior of high resiliency modification SMA-10 compound has had raising to a certain degree;-10 DEG C of low temperature flexural-tensile strains being significantly improved than modified asphalt SMA-10 of high-elastic modified asphalt SMA-10, low-temperature deformation ability strengthens greatly, this means that high-elastic modified asphalt SMA-10 can bear higher limiting strain, thus solve the upper layer SMA-10 bituminous mixture problem of Cracking faced in paving steel bridge deck at present.The fatigue life ratio plain asphalt compound of high-elastic asphalt compound exceed about 25 times, fatigue life significantly improves, simultaneously in same strain situation, the accumulative dissipated energy of high-elastic modified asphalt compound will far away higher than the accumulative dissipated energy of modified asphalt compound.
Claims (10)
1. the deck installation structure of an orthotropic plate, it is characterized in that, described paving structure comprises one from bottom to top and to mat formation upper strata containing mat formation lower floor, modified mulseal tack coat and a high elasticity modified asphalt of mica epoxy anticorrosive coat, a solvent-free epoxy resin waterproofing course, a hot melt particle bond layer, a high elasticity modified asphalt, and total pavement thickness is 6-8cm;
Described hot melt particle is the polymeric particles that softening point is greater than 150 DEG C;
Described high elasticity modified asphalt is that elasticity recovers to be greater than the modified bitumen of 95% at 25 DEG C;
Described high elasticity modified asphalt lower floor of mating formation is made up of following method: by described high elasticity modified asphalt and Mineral Aggregate mix, make particulate formula bituminous mixture, then mat formation;
Described high elasticity modified asphalt upper strata of mating formation is made up of following method: by described high elasticity modified asphalt and Mineral Aggregate mix, make particulate formula or middle grain formula bituminous mixture, then mat formation.
2. paving structure as claimed in claim 1, it is characterized in that, described paving structure is laid on steel bridge deck, described steel bridge deck before mating formation through derusting by sandblasting process.
3. paving structure as claimed in claim 1 or 2, is characterized in that, the described mica epoxy anticorrosive coat that contains is making containing the roller coating of mica epoxy resin of SikaCor HM Primer by model;
And/or the described build containing mica epoxy anticorrosive coat is 60-80 μm;
And/or the build of described solvent-free epoxy resin waterproofing course is 1.0-1.8mm.
4. paving structure as claimed in claim 1 or 2, it is characterized in that, the particle diameter of the hot melt particle in described hot melt particle bond layer is 1.5-4mm, and average grain diameter is 2mm;
And/or described hot melt stratum granulosum meets following index: the quality of unit square rice hot melt particle is 0.6-1.0kg;
And/or described hot melt particle is formed by ethylene-vinyl acetate copolymer and styrene resin melting mixing, the molecular weight of described ethylene-vinyl acetate copolymer is 1500-4000, and the molecular weight of described styrene resin is 80-300.
5. paving structure as claimed in claim 4, it is characterized in that, described hot melt stratum granulosum meets following index: the quality of unit square rice hot melt particle is 0.8-1.0kg;
And/or, described hot melt particle by ethylene-vinyl acetate copolymer and styrene resin in mass ratio 99:1-60:40 melting mixing form, described ethylene-vinyl acetate copolymer is the ethylene-vinyl acetate copolymer of trade mark 9F1, and described styrene resin is the styrene resin of the trade mark 275.
6. paving structure as claimed in claim 1 or 2, it is characterized in that, by high resiliency modifier and No. 70 pitches, high speed shear under high-speed shearing machine obtains described high elasticity modified asphalt.
7. paving structure as claimed in claim 5, it is characterized in that, the raw material of described high resiliency modifier comprises following component by weight: styrene butadiene styrene block copolymer (SBS) 100 parts, tackifier 20-40 part, softening agent 20-40 part, warm-mixing agent 3-8 part, plasticizing agent 15-40 part and stabilizing agent 2-6 part.
8. paving structure as claimed in claim 6, it is characterized in that, described high resiliency modifier is prepared as follows: described tackifier, styrene butadiene styrene block copolymer (SBS) and warm-mixing agent are mixed in high-speed mixing equipment by formula; Be uniformly mixed with described softening agent, stabilizing agent and plasticizing agent again, extruded by double screw extruder, pelletizing, extrusion temperature controls at 140-200 DEG C, after cooling and get final product.
9. paving structure as claimed in claim 1 or 2, is characterized in that, the mat formation thickness of lower floor of described high elasticity modified asphalt is 2.5-4mm;
And/or described particulate formula bituminous mixture adopts SMA-10 or AC-10F grating, and void content controls at 2.5-3.5%;
And/or described modified emulsifying asphalt tack coat meets following index: the quality of unit square rice modified emulsifying asphalt is 0.4-0.6kg.
10. paving structure as claimed in claim 1 or 2, is characterized in that, the mat formation thickness on upper strata of described high elasticity modified asphalt is 3.5-5cm;
And/or described particulate formula or middle grain formula bituminous mixture adopt SMA-13, SMA-16, OGFC-13 or OGFC-16 grating; Wherein, for SMA-13 or SMA-16 grating, void content controls at 3-5%, and for OGFC-13 or OGFC-16 grating, void content controls at 18-22%.
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