CN1657708A - Bituonen-concrete-steel bridge floor and its spreading method - Google Patents
Bituonen-concrete-steel bridge floor and its spreading method Download PDFInfo
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Abstract
The invention relates to a bitumen-concrete-steel bridge floor structure and its paving method. The bridge floor is comprised bitumen-concrete-steel bridge surface through derusting, binder, epoxy mortar and modified emulsified asphalt layer, particle pitch layer and SMA pitch mixture layer, the paving method is firstly do derusting to the bitumen-concret-steel bridge floor, then place binder, epoxy mortar and modified emulsified asphalt layer, particle pitch layer and SMA pitch mixture layer from up to down. The invention has increased the sticking strength of pitch mixture and bitumen-concrete-steel bridge floor through the media effect of modified binder, epoxy mortar, pitch has strengthened shearing strength of the structure layer, SMA pitch mixture has increased the resistance to track, crack, sliding and water of the bridge floor.
Description
Technical field the present invention relates to a kind of Bituonen-concrete-steel bridge floor structure and paving method thereof.
Unique advantages such as background technology steel case beam is big, in light weight with its span, easy construction are used widely, mat formation with cement concrete bridge deck and to compare, paving steel bridge deck has some specific (special) requirements: mating formation has higher shear strength between layer and the steel bridge face, the requirement layer of mating formation has good flexibility and chasing after from deformability, higher rutting resistance and good dense water can wait, after most of paving steel bridge decks are finished and are open to traffic soon, diseases such as rut, passing, cracking just appear, jeopardize bridge life, and major injury road service quality.Therefore, the paving steel bridge deck problem is puzzlement bridge worker's a global difficult problem always.For addressing the above problem, now work out the systems of mating formation such as pouring asphalt concrete, individual layer SMA, double-deck SMA, epoxy asphalt concrete.Adopt the pouring asphalt concrete system of mating formation, winter just occurred the crack then being open to traffic, just occurred rut in 1 year.SMA is a kind of typical matrix type compact structure, have good thermostability, dense water, crack resistance, be suitable for firm structure, adopt two SMA schemes, solved permanent deformation problems such as rut, but the bonding of SMA structure and steel bridge face is difficult to obtain desirable solution all the time, bonding shear strength is not high, form the weak area of deck, make the SMA structural performance be difficult to give full play to, great majority pushing phenomenon just occurs after adopting the bridge of double-deck SMA structure to be open to traffic soon.The epoxy resin asphalt concrete is by add thermosetting epoxy resin and curing compound in pitch; through curing reaction and a kind of high strength that forms, the bituminous concrete of good toughness; has good interlayer binding ability; good temperature stability and anti-fatigue performance; China's yangtze river in nanjing two bridges have been used the epoxy asphalt concrete system of mating formation; current state is good; but this bridge limiting overload vehicle ' always after be open to traffic; effectively good protective action has been played in the limit for tonnage measure, and the actual effect of mating formation is still waiting the test of time.
Diseases such as rut, passing, cracking appear in bridge floor, and all will drop into a large amount of funds and carry out maintenance every year, and the annual maintenance funds of one 900 meters long bridge reach 300～12,000,000 according to investigations, cause enormous economic loss.Therefore, the new paving steel bridge deck technology of research is imperative.
The applicant has applied for " steel bridge surface adhesive " (number of patent application 200510018104.6), bonding agent is mixed by first component and second component, the first component is made up of resin, modifier, composite antirust filler, reactive diluent, solvent or diluent, resin has low-molecular-weight epoxy resin, modifier has liquid acrylonitrile butadiene rubber, the composite antirust filler has wollastonite in powder, and solvent or diluent has dimethylbenzene-butanols; The second component is made up of polyamide 6 51, polyamide 6 50, dimethylbenzene-butanols.Cementing agent is a base-material with epoxy resin, adds various modifier, compares existing cementing agent, and its normal temperature adhesive strength improves 2.63-3.26 doubly, and high temperature bonding intensity improves 1.43 times; The cracking strain improves 10%, and low temperature does not ftracture, and pliability is good, and anti-crack ability is strong.
Summary of the invention the objective of the invention is at above-mentioned present situation, aim to provide a kind of anti-rut, cracking resistance, antiskid and close outlet capacity that can improve the road surface, effectively solve the asphalt concrete pavement that is prone on the steel bridge face and pass, ftracture, gather around problems such as bag, the asphalt concrete steel bridge floor and the paving method thereof of long service life.
The implementation of the object of the invention is that the asphalt concrete steel bridge floor is made up of from bottom to top the steel bridge face 1 through derusting by sandblasting, bridge floor bonding agent 2, epoxy mortar and modified emulsifying asphalt adhesion coating 3, particulate formula asphalt concrete layer 4 and SMA bituminous mixture layer 5.
Epoxy mortar 3 is wherein made by following proportion raw material: cement: sand: water: emulsion epoxy resin=1: 2: 0.4: 0.10-0.14; Particulate formula asphalt concrete asphalt concrete layer 4 is made by following level proportion raw material: 3～5mm gathers materials: 0～3mm gathers materials: natural sand: breeze=23: 57: 15: 5, and bitumen aggregate ratio is: OAC=8.8%; SMA bituminous mixture layer 5 is made by following level proportion raw material: 9.5～13.2mm rubble: 4.75～9.5mm rubble: the following rubble of 2.36～4.75mm rubble: 2.36mm: breeze=42: 39: 0: 7: 12, bituminous mixture is mixed with fiber, bitumen aggregate ratio 5.0-7%, fibers content are 2-4 ‰.
The paving method of asphalt concrete steel bridge floor, carry out as follows:
A, steel bridge face 1 carried out derusting by sandblasting handle,
B, through the thick bridge floor bond layer 2 of steel bridge face 1 upper berth of derusting by sandblasting 0.3～0.8mm,
C, at bridge floor bonding agent 2 upper berths 10～30mm thick epoxy mortar and modified emulsifying asphalt adhesion coating 3, epoxy mortar 3 is made by following proportion raw material: cement: sand: water: emulsion epoxy resin=1: 2: 0.4: 0.12,
D, repave the thick particulate formula asphalt concrete layer 4 of 15～30mm, particulate formula asphalt concrete layer 4 is made by following level proportion raw material: 3～5mm gathers materials: 0～3mm gathers materials: natural sand: breeze=23: 57: 15: 5, and bitumen aggregate ratio is: OAC=8.8%,
E, spread the thick SMA bituminous mixture layer 5 of 30～50mm at last, SMA bituminous mixture layer 5 is made by following level proportion raw material: 9.5～13.2mm rubble: 4.75～9.5mm rubble: the following rubble of 2.36～4.75mm rubble: 2.36mm: breeze=42: 39: 0: 7: 12, bituminous mixture is mixed with fiber, bitumen aggregate ratio 5.0-7%, fibers content are 2-4 ‰.
The present invention has following characteristics:
1, mat formation layer and adhesion problem and the close water problems of steel bridge face and the pliability of mating formation layer and chase after have been solved emphatically from deformability, improved the rutting resistance of upper layer simultaneously, solved the passing that often occurs in the paving steel bridge deck well, ftractureed, gather around disease such as bag;
2, in bonding agent admixture flexibilizer, in epoxy mortar, added the binding ability that emulsifier comes reinforced epoxy and mortar, particulate formula asphalt concrete and SMA compound have been developed, make the adhesion stress normal temperature of bridge floor be issued to 8.1MPa, 70 ℃ have also reached 4.8MPa, be higher than the needed adhesion stress of paving steel bridge deck far away, epoxy mortar and particulate formula asphalt concrete compound have good pliability, dense water energy and anti-fatigue performance, wherein the microstrain of mortar has reached 2500 μ m, reached the required strain capacity of paving steel bridge deck, the SMA stability at high temperature of asphalt mixture is good, have good rutting resistance and anti-water damage ability, prolonged the life-span of steel bridge face;
3, construction technology is simple, only needs to increase the emulsification intensification equipment of a cover epoxy resin, and raw material sources are wide, compare with the ordinary steel deck paving, and cost slightly rises;
The present invention uses on city speedway thing lake intercommunication D ramp bridge at army's mountain bridge and Wuhan, through the operation test in 1 year, any mass defect do not occur, illustrates that the present invention is successful, can large-scale promotion.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the present invention's block diagram of mating formation
The specific embodiment is with reference to Fig. 1, and this asphalt concrete steel bridge floor is made up of from bottom to top the steel bridge face 1 through derusting by sandblasting, bridge floor bonding agent 2, epoxy mortar and modified emulsifying asphalt adhesion coating 3, particulate formula asphalt concrete layer 4 and SMA bituminous mixture layer 5.Bridge floor bond layer 2 thick 0.3～0.8mm, epoxy mortar and modified emulsifying asphalt adhesion coating 3 thick 10～30mm, particulate formula asphalt concrete layer 4 thick 15～30mm, SMA bituminous mixture layer 5 thick 30～50mm.
The present invention mats formation step as shown in Figure 2.
" steel bridge surface adhesive " (number of patent application 200510018104.6) that the present invention adopts the applicant to apply for mixed by first component and second component, and the weight ratio of first, second component is the first component: the second component=(5-7): 1,
The first component is made up of the material of following proportioning %:
Resin 30-43% modifier 5-10%
Composite antirust filler 25-50% reactive diluent 5-13%
Solvent or diluent 5-12%
Resin has low-molecular-weight epoxy resin, and modifier has liquid acrylonitrile butadiene rubber, and the composite antirust filler has wollastonite in powder, and solvent or diluent has dimethylbenzene-butanols, and dimethylbenzene and butanols weight proportion are 3: 1,
The second component is made up of the material of following proportioning %:
Polyamide 6 51 82-89% polyamide 6s 50 5-9%
Dimethylbenzene-butanols 3-10%
This bonding agent is than other cementing agent, and the normal temperature adhesive strength improves 2.63-3.26 doubly, and high temperature bonding intensity improves 1.43 times; The cracking strain improves 10%, and low temperature does not ftracture, and pliability is good, and anti-crack ability is strong.
Epoxy mortar of the present invention and modified emulsifying asphalt adhesion coating 3 are divided into the two large divisions, and the one, ordinary mortar, the 2nd, emulsion epoxy resin.In the epoxy mortar development process, at first according to the proportion design method of ordinary mortar, the proportioning of design ordinary mortar, the intensity of ordinary mortar satisfies above-mentioned technical performance index, but microstrain does not meet the demands, modulate emulsion epoxy resin then, admixture emulsifier polyvinyl alcohol in epoxy resin, the flexibilizer dibutyl ester has improved the hydrophilicity of epoxy resin, epoxy resin can be distributed in the mortar more equably go, improved pliability, cracking resistance and water conservation, the mobile performance of mortar; The admixture curing agent ethylene diamine is through curing reaction and a kind of high strength that forms, the epoxy mortar compound of good toughness meet the demands the emulsion epoxy resin mortar performance.
Through the overtesting contrast, chosen the proportioning of three kinds of epoxy mortars, concrete proportioning is as follows:
Table 1 epoxy mortar proportioning
| The proportioning numbering | Cement | Sand | Water | Epoxy emulsion |
| ????1 | ????1 | ????2 | ????0.4 | ????0.10 |
| ????2 | ????1 | ????2 | ????0.4 | ????0.12 |
| ????3 | ????1 | ????2 | ????0.4 | ????0.14 |
Epoxy mortar technical indicator by this proportioning configuration sees Table 2
Table 2 epoxy mortar results of property
| The proportioning numbering | Strain stress (μ m) | Rupture strength (MPa) | Compressive strength (MPa) | |||||
| 3 days | 28 days | 3 days | 7 days | 28 days | 3 days | 7 days | 28 days | |
| ??????1 | ??1257.4 | ??2235.7 | ????4.3 | ????5.9 | ????7.2 | ????16.4 | ????26.7 | ????36.8 |
| ??????2 | ??1468.8 | ??2598.2 | ????4.2 | ????5.9 | ????7.0 | ????15.3 | ????24.2 | ????33.4 |
| ??????3 | ??1494.6 | ??2583.4 | ????3.8 | ????5.6 | ????6.5 | ????14.3 | ????22.5 | ????30.6 |
As can be seen from the above results, no matter the epoxy mortar of three groups of epoxy mortar proportioning configurations is intensity or microstrain, all satisfies the required epoxy mortar technical performance index of paving steel bridge deck, under the effect of steel bridge surface adhesive and steel plate have good adhesive property.After the plucking processing was done on the mortar surface, the mortar surface roughness greatly increased, and bond effect can be better.
In the present invention, particulate formula asphalt concrete bituminous concrete mainly plays a part to chase after from distortion and water shutoff, therefore, particulate formula asphalt concrete bituminous mixture must have good toughness, under the effect of heavily loaded traffic, good chasing after from deformability when being out of shape, upper layer arranged, can not ftracture or come off; Void content is little, has good dense water energy, guarantees that moisture content can not be penetrated on the bridge floor, and bridge floor is got rusty; Has good anti-fatigue ability.
The embodiment of particulate formula asphalt concrete bituminous mixture of the present invention and technical performance index are required to see Table 3 and table 4.
Table 3 particulate formula asphalt concrete embodiment
Breeze in the notes table is CaCo
3Powder.
Table 4 particulate formula asphalt concrete technical indicator and measured result
| Pilot project | Standard-required | Measured result |
| Void content (%) | ????0.5-2.5 | ????1.4 |
| Void in mineral aggregate (%) | ????＞16 | ????19.5 |
| Dimension nurse stability | ????＞18 | ????22 |
| Dynamic stability/mm | ????＞500 | ????670 |
| Bent beam fatigue test (2000 μ m, 10Hz, 20 ℃) | ????＞100,000 | ????＞600,000 |
As seen from the table, every index of particulate formula asphalt concrete bituminous mixture all satisfies above-mentioned requirements.
The SMA bituminous mixture is a kind of typical matrix type compact structure, has good heat stability, dense water, crack resistance, is suitable for steel work.SMA bituminous mixture one deck of only mating formation in the present invention program is mainly brought into play the rutting resistance of its matrix type compact structure.The SMA bituminous mixture is mixed with the organic synthetic fibers that average length is 5～7mm, and fiber is as the stabilizing agent in the SMA compound, and adopting average length is the organic synthetic fibers of 5～7mm, to strengthen the anti-fatigue performance of SMA compound.
The SMA asphalt mixture gradation sees Table 5 than embodiment
Table 5 SMA asphalt concrete proportioning embodiment
| Screen size (mm) | Formate gradation composition | Grating intermediate value (%) | SMA-13 grading limit (%) |
| ????16 | ????100 | ????100 | ????100 |
| ????13.2 | ????90.8 | ????95 | ????90～100 |
| ????9.5 | ????61.5 | ????62.5 | ????50～75 |
| ????4.75 | ????26.3 | ????26 | ????20～32 |
| ????2.36 | ????18.9 | ????20.5 | ????15～26 |
| ????1.18 | ????17.5 | ????19 | ????14～24 |
| ????0.6 | ????15.2 | ????16 | ????12～20 |
| ????0.3 | ????13.9 | ????13 | ????10～16 |
| ????0.15 | ????13.0 | ????11.5 | ????8～15 |
| ????0.075 | ????10.9 | ????10 | ????8～12 |
| Mineral aggregate bulk volume relative density ρ sb | ????2.877 | ???? | ???? |
| 4.75mm above coarse aggregate bulk volume relative density ρ ca | ????2.943 | ???? | ???? |
| 4.75 above coarse aggregate loose measure relative density ρ s | ????1.759 | ???? | ???? |
| 4.75 above coarse aggregate VCA DRC(％) | ????40.2 | ???? | ???? |
| Best bitumen aggregate ratio (%) | ????????????????????6 | ||
| Fibers content (‰) | ????????????????????3 | ||
Under this grating and bitumen aggregate ratio, the service check of SMA bituminous mixture the results are shown in Table 6 and table 7.
Table 6 Marshall Test result
| Bitumen aggregate ratio (%) | Solid density (g/cm 3) | Actual density (g/cm 3) | ?VV (％) | ?VMA ?(％) | ??VCAmix ??(％) | ??VA ??(％) | ??VFA ??(％) | Stability (KN) | Flow valuve (0.1mm) |
| ??6.0 | ??2.611 | ??2.501 | ?4.2 | ?18.0 | ??37.4 | ??13.8 | ??76.7 | ??8.01 | ????35.5 |
Table 7 SMA bituminous concrete performance test result
| Pilot project | Wheel tracking test (inferior/mm) | Analyse Lou test (%) | The freeze thawing cleavage strength is than (%) | Construction depth (mm) | Infiltration coefficient (ml/min) | Residual stability (%) |
| Result of the test | ???7925 | ???0.12 | ???92.7 | ???1.15 | ?????11 | ????87.8 |
From table 6,7 as seen, the every index of SMA bituminous concrete all meets the demands.
The performance indications contrast of the present invention and various steel bridge faces sees Table 8
Table 8 the present invention and other mat formation mode performance relatively
| Two SMA | Pouring asphalt concrete | Epoxy asphalt concrete | The present invention | |
| Adhesion strength MPa | ????1.9 | ????2.5 | ????2.23 | ????8.1 |
| The dense water energy | Generally | Good | Generally | Good |
| Cracking resistance | Good | Generally | Good | Good |
| Rutting resistance | Good | Generally | Generally | Good |
| Workability | Good | Generally | Good | Good |
As seen from Table 8, the every technical indicator of the present invention all is better than other bridge floor.
Claims (4)
1, Bituonen-concrete-steel bridge floor is characterized in that being made up of from bottom to top the steel bridge face (1) through derusting by sandblasting, bridge floor bond layer (2), epoxy mortar and modified emulsifying asphalt adhesion coating (3), particulate formula asphalt concrete layer (4) and SMA bituminous mixture layer (5),
Epoxy mortar wherein (3) is made by following proportion raw material: cement: sand: water: emulsion epoxy resin=1: 2: 0.4: 0.10-0.14, particulate formula asphalt concrete layer (4) is made by following level proportion raw material, 3～5mm gathers materials: 0～3mm gathers materials: natural sand: breeze=23: 57: 15: 5, bitumen aggregate ratio is: OAC=8.8%, SMA bituminous mixture layer (5) is made by following level proportion raw material: 9.5～13.2mm rubble: 4.75～9.5mm rubble: the following rubble of 2.36～4.75mm rubble: 2.36mm: breeze=42: 39: 0: 7: 12, the SMA bituminous mixture is mixed with fiber, bitumen aggregate ratio 5.0～7%, fibers content are 2～4 ‰.
2, Bituonen-concrete-steel bridge floor according to claim 1, it is characterized in that the thick 0.3～0.8mm of bridge floor bond layer (2), epoxy mortar and the thick 10～30mm of modified emulsifying asphalt adhesion coating (3), the thick 15～30mm of particulate formula asphalt concrete layer (4), the thick 30～50mm of SMA bituminous mixture layer (5).
3, Bituonen-concrete-steel bridge floor according to claim 1 is characterized in that the SMA bituminous mixture is mixed with the organic synthetic fibers that average length is 5～7mm.
4, the paving method of the described Bituonen-concrete-steel bridge floor of claim 1 is characterized in that carrying out as follows:
A, steel bridge face 1 carried out derusting by sandblasting handle,
B, through the thick bridge floor bond layer 2 of steel bridge face 1 upper berth of derusting by sandblasting 0.3～0.8mm,
C, at bridge floor bonding agent 2 upper berths 10～30mm thick epoxy mortar and modified emulsifying asphalt adhesion coating 3, epoxy mortar and modified emulsifying asphalt adhesion coating 3 are made by following proportion raw material: cement: sand: water: emulsion epoxy resin=1: 2: 0.4: 0.10-0.14,
D, repave the thick particulate formula asphalt concrete layer 4 of 15～30mm, particulate formula asphalt concrete asphalt concrete layer 4 is made by following level proportion raw material: 3～5mm gathers materials: 0～3mm gathers materials: natural sand: breeze=23: 57: 15: 5, and bitumen aggregate ratio is: OAC=8.8%,
E, spread the thick SMA bituminous mixture layer 5 of 30～50mm at last, SMA bituminous mixture layer 5 is made by following level proportion raw material: 9.5～13.2mm rubble: 4.75～9.5mm rubble: the following rubble of 2.36～4.75mm rubble: 2.36mm: breeze=42: 39: 0: 7: 12, bituminous mixture is mixed with fiber, bitumen aggregate ratio 5.0-7%, fibers content are 2-4 ‰.
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| CN100503731C (en) * | 2006-07-18 | 2009-06-24 | 广东工业大学 | Emulsified asphalt modified by epoxy resin |
| CN101654903B (en) * | 2009-09-15 | 2011-01-12 | 东南大学 | Pavement structure of cement concrete bridge deck |
| CN102010607A (en) * | 2010-12-02 | 2011-04-13 | 东莞市东物合成材料有限公司 | Thermosetting emulsified epoxy resin modified emulsified asphalt |
| CN102010608A (en) * | 2010-12-02 | 2011-04-13 | 东莞市东物合成材料有限公司 | Thermosetting emulsified flexible epoxy resin modified emulsified asphalt |
| CN102060474A (en) * | 2010-12-02 | 2011-05-18 | 东莞市东物合成材料有限公司 | Thermosetting flexible epoxy resin modified emulsified asphalt |
| CN102173663A (en) * | 2011-01-10 | 2011-09-07 | 武汉理工大学 | Waterborne epoxy modified emulsified asphalt concrete for steel bridge surface and preparation method thereof |
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| JPS636811A (en) * | 1986-06-26 | 1988-01-12 | Seiko Instr & Electronics Ltd | Magnet |
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| CN101654903B (en) * | 2009-09-15 | 2011-01-12 | 东南大学 | Pavement structure of cement concrete bridge deck |
| CN102060474B (en) * | 2010-12-02 | 2012-08-01 | 东莞市东物合成材料有限公司 | Thermosetting flexible epoxy resin modified emulsified asphalt |
| CN102010608B (en) * | 2010-12-02 | 2013-01-02 | 东莞市东物合成材料有限公司 | Thermosetting emulsified flexible epoxy resin modified emulsified asphalt |
| CN102060474A (en) * | 2010-12-02 | 2011-05-18 | 东莞市东物合成材料有限公司 | Thermosetting flexible epoxy resin modified emulsified asphalt |
| CN102010608A (en) * | 2010-12-02 | 2011-04-13 | 东莞市东物合成材料有限公司 | Thermosetting emulsified flexible epoxy resin modified emulsified asphalt |
| CN102010607B (en) * | 2010-12-02 | 2012-08-01 | 东莞市东物合成材料有限公司 | Thermosetting emulsified epoxy resin modified emulsified asphalt |
| CN102010607A (en) * | 2010-12-02 | 2011-04-13 | 东莞市东物合成材料有限公司 | Thermosetting emulsified epoxy resin modified emulsified asphalt |
| CN102173663A (en) * | 2011-01-10 | 2011-09-07 | 武汉理工大学 | Waterborne epoxy modified emulsified asphalt concrete for steel bridge surface and preparation method thereof |
| CN102173663B (en) * | 2011-01-10 | 2013-06-12 | 武汉理工大学 | Waterborne epoxy modified emulsified asphalt concrete for steel bridge surface and preparation method thereof |
| CN102505601B (en) * | 2011-11-21 | 2014-06-11 | 重庆大学 | Fast repairing method for asphalt concrete pavement |
| CN102505601A (en) * | 2011-11-21 | 2012-06-20 | 重庆大学 | Fast repairing method for asphalt concrete pavement |
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| CN109749409A (en) * | 2018-12-28 | 2019-05-14 | 中水电第十一工程局（郑州）有限公司 | A kind of dedicated ageing-resistant, resistant abrasion ceramic composite of waterwork |
| CN111875299A (en) * | 2020-08-06 | 2020-11-03 | 长沙理工大学 | Magnetic powder modified asphalt mixture and preparation method thereof |
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