CN103981813B - The construction method of epoxy asphalt concrete bridge floor - Google Patents
The construction method of epoxy asphalt concrete bridge floor Download PDFInfo
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- CN103981813B CN103981813B CN201410244674.6A CN201410244674A CN103981813B CN 103981813 B CN103981813 B CN 103981813B CN 201410244674 A CN201410244674 A CN 201410244674A CN 103981813 B CN103981813 B CN 103981813B
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Abstract
The present invention relates to a kind of construction method of epoxy asphalt concrete bridge floor, epoxy asphalt concrete deck paving wherein, on steel bridge deck, comprises water-proof tack coat, lower floor's epoxy asphalt concrete, concrete conglutination layer and the upper strata epoxy asphalt concrete of from bottom to top constructing successively.Construction method of the present invention comprises the following steps: the construction of the cleaning of steel bridge deck, the brushing of water-proof tack coat, the paving of lower floor's epoxy asphalt concrete, concrete setting course, the paving and the maintenance of bridge floor of upper strata epoxy asphalt concrete.In work progress, strict control engineering time and construction temperature, thus strength and stiffness is large, anti-fatigue performance and high-temperature stability are got well and have the epoxy asphalt concrete bridge floor of good bonding and water resistance to make to utilize construction method of the present invention to obtain.Construction method of the present invention is applicable to the technical field of highway construction.
Description
Technical field
The present invention relates to a kind of construction method of epoxy asphalt concrete bridge floor, particularly relate to a kind of construction method of making epoxy asphalt concrete bridge floor on steel bridge deck, belong to the technical field of highway construction.
Background technology
Bituminous epoxy is a kind of by epoxy resin, curing compound and the pitch mixture through complicated chemical modification gained.Epoxy asphalt mixture after solidification is the material that a kind of intensity and mechanical property are all higher, and lower to the sensitivity of temperature.The U.S. begins one's study from eighties of last century and promotes the use of epoxy asphalt concrete the sixties, and China's starting is in this respect then more late.
Epoxy asphalt concrete has high strength, high-adhesion, antifatigue, the excellent performance such as corrosion-resistant, is usually used in mating formation of Steel Bridge Deck.Paving steel bridge deck, except will meeting the basic demand on plain asphalt road surface, also should have the technical performance adapted with the design feature of bridge construction and orthotropic steel bridge deck, service condition.Especially, need that there is enough strength and stiffness, excellent anti-fatigue performance and high-temperature stability, good bonding and water resistance.But epoxy asphalt concrete construction technology is complicated, higher to the requirement of environment, engineering time and construction temperature, the success or not of these operations directly has influence on the functional performance of pave-load layer.
Therefore, a kind of construction method that can meet the epoxy asphalt concrete bridge floor of above-mentioned all requirements is needed in prior art.
Summary of the invention
Adopt the construction method of epoxy asphalt concrete bridge floor of the present invention, strength and stiffness of can mating formation is large, anti-fatigue performance and high-temperature stability get well and have the epoxy asphalt concrete bridge floor of good bonding and water resistance.
The present invention relates to a kind of construction method of epoxy asphalt concrete bridge floor, wherein, epoxy asphalt concrete deck paving is on steel bridge deck, comprise water-proof tack coat, lower floor's epoxy asphalt concrete, concrete conglutination layer and the upper strata epoxy asphalt concrete from bottom to top laid successively, construction method comprises the following steps:
The cleaning of step one, steel bridge deck
By the dust on steel bridge deck, particle and oily waste degradation, and the crator protruded on surface, rusty stain sander polish flat; By clean for the cleaning of whole surface and after drying, steel bridge deck sprays epoxide modified laccol titanium anti-corrosive primer, and construction temperature is 20-35 DEG C, the amount that first pass sprays epoxide modified laccol titanium anti-corrosive primer is every square meter 0.15-0.2 kilogram; Interval spraying in 24 hours second time epoxide modified laccol titanium anti-corrosive primer after first time has sprayed, the quantity for spray of second time epoxide modified laccol titanium anti-corrosive primer is every square meter 0.1-0.15 kilogram, brushing water-proof tack coat after formation paint film done solid work by priming paint;
The brushing of step 2, water-proof tack coat
Adopt bituminous epoxy water-proof tack coat, this bituminous epoxy water-proof tack coat is 100: 250-270: 25-30: 15-18: 10-12 to be mixed by pitch, epoxy resin, polyacrylate, polyurethane polyol, silica according to mass ratio; Preparation method is: first epoxy resin, polyacrylate, polyurethane polyol are mixed and are heated to 90 ± 2 DEG C, then pours molten asphalt into and the formation that stirs after adding silica;
Bituminous epoxy water-proof tack coat is logical to be gone over brushing and completes, and during brushing construction, the temperature of mixed material is not less than 70 DEG C, and brushing amount is every square meter 1.76 ± 0.05 kilograms;
Paving of step 3, lower floor's epoxy asphalt concrete
Lower floor's epoxy asphalt concrete is 1: 3.4-4.6: 63-80: 1.5-2.2 to be mixed by component A, B component, aggregate and curing compound according to mass ratio; Wherein, component A is 100: 16-20: 8-10: 5-8 by mass ratio epoxy resin, silicon rubber, polysulfide rubber and liquid acid anhydrides form; SBS modified bitumen, catalyzer and colorant that B component is 100: 3-4: 0.3-0.5 by mass ratio form; Aggregate comprises basalt particle and breeze, and both mass ratioes are 100: 30-40, and the particle diameter of basalt particle is 1.5-9.0mm; Curing compound adopts epoxy curing agent; The drop temperature of lower floor's epoxy asphalt concrete remains on 120 ± 2 DEG C;
Lower floor's epoxy asphalt concrete uses paver carry out paving and use rolling machine compacting, and the speed paved is 4-4.8 m/min, thickness is 36-40mm; After having paved, use rolling machine to carry out rolling for twice, when breakdown completes, the temperature of lower floor's epoxy asphalt concrete paving layer is not less than 92 DEG C, is not less than before 70 DEG C in the temperature of paving layer, completes secondary and rolls;
The construction of step 4, concrete setting course
Concrete setting course by mass ratio be 1: 2-2.5 epoxy resin and pitch formed, preparation method for epoxy resin being heated to 80 DEG C, asphalt heating to 160 DEG C mixed later form, the thickness of concrete setting course is 2-3mm;
Paving of step 5, upper strata epoxy asphalt concrete
The paving thickness of upper strata epoxy asphalt concrete is 18-20mm, its component with lower floor epoxy asphalt concrete and construction method identical;
Step 6, maintenance
Upper strata epoxy asphalt concrete pave and roll complete after, natural curing 30 days.
Preferably, the amount that first pass sprays epoxide modified laccol titanium anti-corrosive primer is every square meter 0.18 kilogram, and the amount spraying epoxide modified laccol titanium anti-corrosive primer for second time is every square meter 0.12 kilogram.
Preferably, the mass ratio of bituminous epoxy water-proof tack coat medium pitch, epoxy resin, polyacrylate, polyurethane polyol, silica is 100: 265: 27: 16: 12.More preferably, the mass ratio of component A epoxy resin, silicon rubber, polysulfide rubber and liquid acid anhydrides is 100: 18: 10: 6, and in B component, the mass ratio of SBS modified bitumen, catalyzer and colorant is 100: 3.6: 0.5.
Preferably, catalyzer is NaOH or potassium hydroxide or polyamide, and colorant is the carbon black of particle diameter 75-85 micron.Curing compound can be aliphatic diamine, polyamines, aromatic polyamine or dicyandiamide.
Preferably, lower floor's epoxy asphalt concrete and upper strata epoxy asphalt concrete are to form at 1: 4.2: 67: 2 by component A, B component, aggregate and curing compound according to mass ratio.More preferably, the preparation method of lower floor's epoxy asphalt concrete and upper strata epoxy asphalt concrete is: component A, B component and aggregate are heated to respectively 71 DEG C, 167 DEG C, 130 DEG C, are then mixed in a kettle., and adds curing compound and stir and form.
Strength and stiffness is large, anti-fatigue performance and high-temperature stability are got well and have the epoxy asphalt concrete bridge floor of good bonding and water resistance to utilize construction method of the present invention to obtain.
Accompanying drawing explanation
Fig. 1 shows the sectional schematic diagram of epoxy asphalt concrete bridge floor of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can be combined mutually.
See accompanying drawing 1, which show the sectional schematic diagram of epoxy asphalt concrete bridge floor of the present invention.As shown in the figure, epoxy asphalt concrete deck paving, on steel bridge deck 1, comprises water-proof tack coat 2, lower floor's epoxy asphalt concrete 3, concrete conglutination layer 4 and the upper strata epoxy asphalt concrete 5 of from bottom to top mating formation successively.The step of mating formation of epoxy asphalt concrete bridge floor of the present invention is as follows:
One, the cleaning of steel bridge deck
Epoxy asphalt concrete that steel bridge deck is mated formation is typical layered composite structure, is that asphalt concrete pavement layer forms by water-proof tack coat and steel bridge deck body of combining closely.Because the modulus of elasticity of steel, coefficient of thermal conductivity and coefficient of thermal expansion all have larger difference with asphalt concrete pavement layer, therefore the compact siro spinning technology how realized between epoxy asphalt concrete and steel bridge deck is very important.In order to ensure compact siro spinning technology between the two, first thoroughly will clean the surface of steel bridge deck, preventing the bond effect between foreign materials away on steel bridge deck and lower floor's epoxy asphalt concrete.
For this reason, first by the dust on steel bridge deck, particle and oily waste degradation, and the crator protruded on surface, rusty stain sander polish flat.By clean for the cleaning of whole surface and after drying, steel bridge deck sprays epoxide modified laccol titanium anti-corrosive primer, and construction temperature is 20-35 DEG C.More generally, also epoxy zinc rich primer can be sprayed.The amount that first pass sprays epoxide modified laccol titanium anti-corrosive primer is every square meter 0.15-0.2 kilogram, is preferably 0.18 kilogram.Interval spraying in 24 hours second time epoxide modified laccol titanium anti-corrosive primer after first time has sprayed, the quantity for spray of second time epoxide modified laccol titanium anti-corrosive primer is every square meter 0.1-0.15 kilogram, is preferably 0.12 kilogram.Brushing water-proof tack coat after formation paint film done solid work by priming paint.
Two, the brushing of water-proof tack coat
Tack coat is the important component part of deck paving, and the bonds well between asphalt concrete pavement layer and steel bridge deck mainly relies on the cooperative work performance of tack coat.Meanwhile, in order to make, between tack coat and lower floor's epoxy asphalt concrete, there is better harmony and the water resistance strengthening tack coat, preferably adopt bituminous epoxy water-proof tack coat.
For bituminous epoxy water-proof tack coat of the present invention, technical requirements below demand fulfillment:
The material of the bituminous epoxy water-proof tack coat that the present invention adopts is made up of pitch, epoxy resin, polyacrylate, polyurethane polyol, silica, and the mass ratio that wherein each component is corresponding is 100: (250-270): (25-30): (15-18): (10-12).Preferably, the mass ratio of above-mentioned each component is 100: 265: 27: 16: 12.The preparation method of bituminous epoxy water-proof tack coat is: first epoxy resin, polyacrylate, polyurethane polyol mixed according to above-mentioned mass ratio and be heated to 90 ± 2 DEG C, then pours molten asphalt into and the formation that stirs after adding silica.
Bituminous epoxy water-proof tack coat is logical to be gone over brushing and completes, and during brushing construction, the temperature of mixed material is not less than 70 DEG C, and brushing amount is every square meter (1.76 ± 0.05) kilogram.
Three, the paving of lower floor's epoxy asphalt concrete
The epoxy asphalt concrete that the present invention adopts is made up of the mixed material comprising component A, B component, aggregate and curing compound.Wherein, component A is made up of epoxy resin, silicon rubber, polysulfide rubber and liquid acid anhydrides, and mass ratio corresponding to each component is 100: (16-20): (8-10): (5-8).Preferably, the mass ratio of above-mentioned each component is 100: 18: 10: 6.Silicon rubber in component A and polysulfide rubber can reinforced epoxy bituminous concrete toughness, reduce internal stress, thus improve its thermodynamic property.B component is made up of SBS modified bitumen, catalyzer and colorant, and catalyzer wherein can select highly basic such as NaOH or potassium hydroxide, or selects polyamide, and colorant can select such as particle diameter to be the carbon black etc. of 75-85 micron.The mass ratio that in B component, each component is corresponding is 100: (3-4): (0.3-0.5).Preferably, the mass ratio that in B component, each component is corresponding is 100: 3.6: 0.5.
Aggregate comprises basalt particle and breeze, and both mass ratioes are 100: (30-40).Wherein the diameter of basalt particle is 1.5-9.0mm, and its size grading preferably meets the following conditions:
Preferably, curing compound adopts epoxy curing agent.Epoxy curing agent and epoxy resin generation chemical reaction, form netted space polymers, composite material aggregate envelope among reticulate body, facilitates curing reaction.Such as, aliphatic diamine, polyamines, aromatic polyamine or dicyandiamide etc. can be adopted as curing compound.
In epoxy asphalt concrete of the present invention, the mass ratio of component A, B component, aggregate and curing compound is 1: (3.4-4.6): (63-80): (1.5-2.2), and preferred mass ratio is 1: 4.2: 67: 2.Its preparation method, for component A, B component and aggregate are heated to 71 DEG C, 167 DEG C, about 130 DEG C respectively, is then mixed in a kettle., and adds that to be transported to paving site after curing compound stirs stand-by.Finally, the drop temperature (that is, temperature when taking out for paving from reactor) of epoxy asphalt concrete remains on 120 ± 2 DEG C, to ensure the compacting temperature of compound, guarantees to roll quality.It should be noted that component A in epoxy asphalt concrete and B component can react to improve the intensity of compound upon mixing further, so compound can not pave immediately, preferably about 1 hour after being stirred just starts to pave.In order to prevent the decline of the temperature of compound in transportation excessive lower than required drop temperature, can at the outer setting attemperator of reactor and heater.When the temperature of the compound in reactor is lower than required drop temperature, opens heater and the temperature of compound is raised.
Epoxy asphalt concrete uses paver carry out paving and use rolling machine compacting.When the width of bridge floor is greater than the paving width of paver, can on bridge cross direction, use multiple stage paver to pave simultaneously.The speed paved remains on 4-4.8 m/min, and the thickness of lower floor's epoxy asphalt concrete paving layer is 36-40mm.After having paved, use rolling machine to roll, the mode that secondary rolls can have been adopted.When breakdown completes, the temperature of lower floor's epoxy asphalt concrete paving layer must not lower than 92 DEG C.Afterwards, be not less than before 70 DEG C in the temperature of paving layer, complete secondary and roll.
In addition, for the vertical and horizontal constuction joint occurred in work progress, the general mitre adopting 45 °, cuts with hand-held joint cutter.After cutting, also to the discarded object of cutting and cutting surfaces be cleaned clean.
Four, the construction of concrete setting course
Concrete setting course of the present invention is 1 by mass ratio: epoxy resin and the pitch of (2-2.5) are formed, and its preparation method is for being heated to about 80 DEG C respectively, mixing formation after about asphalt heating to 160 DEG C by epoxy resin.The half mobility compound formed is brushed equably on lower floor's epoxy asphalt concrete paving layer.The thickness of concrete setting course is 2-3mm.
Five, the paving of upper strata epoxy asphalt concrete
Component and the construction method of upper strata epoxy asphalt concrete and lower floor epoxy asphalt concrete are identical.Difference is, the paving thickness of upper strata epoxy asphalt concrete is 18-20mm.
Six, the maintenance of bridge floor
Treat upper strata epoxy asphalt concrete pave and roll complete after, maintenance can be open to traffic use for about 30 days.Natural curing mode is generally taked in the maintenance of epoxy asphalt concrete, as environment temperature is very low, hand propelled can be adopted to move infrared lamp or other firing equipments heating pave-load layer, until reach design solid state.
Although the embodiment disclosed by the present invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (7)
1. the construction method of an epoxy asphalt concrete bridge floor, described epoxy asphalt concrete deck paving is on steel bridge deck (1), comprise water-proof tack coat (2), lower floor's epoxy asphalt concrete (3), concrete conglutination layer (4) and the upper strata epoxy asphalt concrete (5) from bottom to top laid successively, it is characterized in that, described construction method comprises the following steps:
The cleaning of step one, steel bridge deck
By the dust on steel bridge deck, particle and oily waste degradation, and the crator protruded on surface, rusty stain sander polish flat; By clean for the cleaning of whole surface and after drying, steel bridge deck sprays epoxide modified laccol titanium anti-corrosive primer, and construction temperature is 20-35 DEG C, the amount that first pass sprays epoxide modified laccol titanium anti-corrosive primer is every square meter 0.15-0.2 kilogram; Interval spraying in 24 hours second time epoxide modified laccol titanium anti-corrosive primer after first time has sprayed, the quantity for spray of second time epoxide modified laccol titanium anti-corrosive primer is every square meter 0.1-0.15 kilogram, brushing water-proof tack coat after formation paint film done solid work by priming paint;
The brushing of step 2, water-proof tack coat
Adopt bituminous epoxy water-proof tack coat, described bituminous epoxy water-proof tack coat is 100: 250-270: 25-30: 15-18: 10-12 to be mixed by pitch, epoxy resin, polyacrylate, polyurethane polyol, silica according to mass ratio; Preparation method is: first epoxy resin, polyacrylate, polyurethane polyol are mixed and are heated to 90 ± 2 DEG C, then pours molten asphalt into and the formation that stirs after adding silica;
Described bituminous epoxy water-proof tack coat is logical to be gone over brushing and completes, and during brushing construction, the temperature of mixed material is not less than 70 DEG C, and brushing amount is every square meter 1.76 ± 0.05 kilograms;
Paving of step 3, lower floor's epoxy asphalt concrete
Described lower floor epoxy asphalt concrete is 1: 3.4-4.6: 63-80: 1.5-2.2 to be mixed by component A, B component, aggregate and curing compound according to mass ratio; Wherein, component A is 100: 16-20: 8-10: 5-8 by mass ratio epoxy resin, silicon rubber, polysulfide rubber and liquid acid anhydrides form; SBS modified bitumen, catalyzer and colorant that B component is 100: 3-4: 0.3-0.5 by mass ratio form; Aggregate comprises basalt particle and breeze, and both mass ratioes are 100: 30-40, and the particle diameter of basalt particle is 1.5-9.0mm; Described curing compound adopts epoxy curing agent; The drop temperature of described lower floor epoxy asphalt concrete remains on 120 ± 2 DEG C;
Described lower floor epoxy asphalt concrete uses paver carry out paving and use rolling machine compacting, and the speed paved is 4-4.8 m/min, thickness is 36-40mm; After having paved, use rolling machine to carry out rolling for twice, when breakdown completes, the temperature of lower floor's epoxy asphalt concrete paving layer is not less than 92 DEG C, is not less than before 70 DEG C in the temperature of paving layer, completes secondary and rolls;
The construction of step 4, concrete conglutination layer
Described concrete conglutination layer by mass ratio be 1: 2-2.5 epoxy resin and pitch formed, preparation method is: epoxy resin is heated to 80 DEG C, mixed by asphalt heating to 160 DEG C later and form, the thickness of described concrete conglutination layer is 2-3mm;
Paving of step 5, upper strata epoxy asphalt concrete
The paving thickness of described upper strata epoxy asphalt concrete is 18-20mm, and component and the construction method of described upper strata epoxy asphalt concrete and described lower floor epoxy asphalt concrete are identical;
Step 6, maintenance
Described upper strata epoxy asphalt concrete pave and roll complete after, natural curing 30 days.
2. construction method according to claim 1, is characterized in that, the amount that first pass sprays epoxide modified laccol titanium anti-corrosive primer is every square meter 0.18 kilogram, and the amount spraying epoxide modified laccol titanium anti-corrosive primer for second time is every square meter 0.12 kilogram.
3. construction method according to claim 1 and 2, is characterized in that, the mass ratio of described bituminous epoxy water-proof tack coat medium pitch, epoxy resin, polyacrylate, polyurethane polyol, silica is 100: 265: 27: 16: 12.
4. construction method according to claim 1 and 2, it is characterized in that, the mass ratio of described component A epoxy resin, silicon rubber, polysulfide rubber and liquid acid anhydrides is 100: 18: 10: 6, and in described B component, the mass ratio of SBS modified bitumen, catalyzer and colorant is 100: 3.6: 0.5.
5. construction method according to claim 1, is characterized in that, described catalyzer is NaOH or potassium hydroxide or polyamide, and described colorant is the carbon black of particle diameter 75-85 micron.
6. construction method according to claim 1, is characterized in that, described lower floor epoxy asphalt concrete and described upper strata epoxy asphalt concrete are to form at 1: 4.2: 67: 2 by component A, B component, aggregate and curing compound according to mass ratio.
7. construction method according to claim 1, it is characterized in that, the preparation method of described lower floor epoxy asphalt concrete and described upper strata epoxy asphalt concrete is: component A, B component and aggregate are heated to respectively 71 DEG C, 167 DEG C, 130 DEG C, then mixed in a kettle., and add curing compound and stir and form.
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| CN104652270B (en) * | 2015-02-11 | 2016-08-24 | 上海市政工程设计研究总院（集团）有限公司 | A kind of deck paving method of orthotropic plate |
| CN108252173A (en) * | 2016-12-29 | 2018-07-06 | 上海公路桥梁（集团）有限公司 | A kind of steel bridge tunneling boring paves construction method |
| US9783940B2 (en) * | 2017-04-05 | 2017-10-10 | Southeast University | Structure and method of pavement on steel deck bridge |
| CN109778697A (en) * | 2018-12-19 | 2019-05-21 | 苏州三品交通建设工程有限公司 | Hot mixed epoxy bitumen concrete construction process |
| CN109577497A (en) * | 2018-12-25 | 2019-04-05 | 重庆纳斯美科技发展有限公司 | A kind of construction technology of resinousness water-repellent paint |
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