CN106810163B - A kind of cement-base infiltration crystallization material and its application in cement concrete bridge deck water-proof tack coat - Google Patents
A kind of cement-base infiltration crystallization material and its application in cement concrete bridge deck water-proof tack coat Download PDFInfo
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- CN106810163B CN106810163B CN201710056136.8A CN201710056136A CN106810163B CN 106810163 B CN106810163 B CN 106810163B CN 201710056136 A CN201710056136 A CN 201710056136A CN 106810163 B CN106810163 B CN 106810163B
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- 239000000463 material Substances 0.000 title claims abstract description 63
- 239000004568 cement Substances 0.000 title claims abstract description 50
- 230000008595 infiltration Effects 0.000 title claims abstract description 32
- 238000001764 infiltration Methods 0.000 title claims abstract description 32
- 238000002425 crystallisation Methods 0.000 title claims abstract description 31
- 230000008025 crystallization Effects 0.000 title claims abstract description 31
- 239000004567 concrete Substances 0.000 title claims abstract description 25
- 239000000839 emulsion Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000011398 Portland cement Substances 0.000 claims abstract description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims abstract description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims abstract description 4
- 150000007513 acids Chemical class 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 239000010426 asphalt Substances 0.000 claims description 13
- 230000001112 coagulating effect Effects 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000002178 crystalline material Substances 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 description 17
- 239000004593 Epoxy Substances 0.000 description 12
- 239000010410 layer Substances 0.000 description 12
- 238000004078 waterproofing Methods 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 238000007586 pull-out test Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of cement-base infiltration crystallization material and its application in cement concrete bridge deck water-proof tack coat, which includes following component: 1) component emulsion A, including pure water and acrylic acid, mass ratio 2:1；2) B component powder, including ordinary portland cement P.O42.5 and fines, mass ratio 1:1, the fines are the Machine-made Sand of partial size 0.3 ~ 2.36；3) component C additive, including fiber, polycarboxylic acids and anhydrous sodium sulfate, mass ratio 1:1:2；The mass ratio of the B component and component C is 20:1；The mass ratio of the mixture and component A of the B component and component C is 4:1.The cement-base infiltration crystallization material can improve the flexibility of traditional cement-base infiltration crystallization material, can suitable for the cement concrete bridge deck water-proof tack coat under the conditions of dynamic load, and have both conventional cement based penetrant crystalline material high temperature resistant, it is corrosion-resistant, ageing-resistant, environmentally friendly and cheap the advantages that.
Description
Technical field
The present invention relates to a kind of cement-base infiltration crystallization material and its answering in cement concrete bridge deck water-proof tack coat
With.
Background technique
Cementitious capillary waterproofing material (Cementitious Capillary Waterproofing
Materials abbreviation CCCW) it is by ordinary portland cement, quartz sand or silica sand, with the chemically composited of activity functional groups
Object composition.It has ageing-resistant, high temperature resistant, corrosion-resistant, environmentally friendly etc. excellent relative to pitch class, synthesis high score subclass waterproof material
Point, and its relative low price.But traditional cement-base infiltration crystallization waterproof material flexibility is poor, is generally all applied to water
In the static state waterproof such as dam, swimming pool, building construction, bridge, and in the cement concrete bridge deck water-proof binding for bearing vehicular load
Almost also no one's application in layer.It is therefore desirable to develop a kind of cement concrete bridge deck water-proof binding that can be applicable under moving load condition
Cement-base infiltration crystallization material in layer.
Sun Qi etc. has studied application of the cementitious capillary waterproofing material in reservoir engineering, to cement-based penetrant knot
Performance characteristics, the construction technology of crystal form waterproof material are studied.
Cai Guowei etc. has studied application of the cementitious capillary waterproofing material in treatment technology for tunnel seepage processing, first to tunnel
Road disease field investigation and the origin cause of formation are analyzed, then are summarized to the regulation principle of Tunnel Water Leakage and management measure,
Finally the construction technology to cement-base infiltration crystallization material in reservoir engineering and technical measures are studied.
Zhu Rui has studied the anti-water blocking of stickiness, the anti-water blocking cementitious capillary waterproofing material of elasticity in civil buildings
Using being analyzed its dosage, construction technology and economic benefit.
Imperial court is strong etc. the characteristics of describing cementitious capillary waterproofing material, classification and waterproof mechanism, and summarizes
The application and points for attention of its static waterproof in the engineerings such as underground, traffic, water conservancy.
Wearing just to wait selects bituminous epoxy as cement concrete bridge deck water-proof binding layer material, passes through viscosity and tests determining ring
The construction temperature of oxygen asphalt waterproofing bonding layer material is 130 DEG C；Spilling for bituminous epoxy is determined by shearing test and pull-out test
Cloth amount is 0.70L/m2；And show that cement concrete bridge deck uses bituminous epoxy as must be tight after water-proof binding layer material spread
Lattice control its curing time in 24-32h.
Zhang Zhengqi etc., as cement concrete bridge deck water-proof binding layer material, analyzes epoxy drip using bituminous epoxy respectively
Blueness uses composite plate simulation test to the adhesion strength of steel plate basal plane, cement plate basal plane, compares SBS modified pitch, changes
Property emulsified asphalt, certain waterproof material RB, several water-proof binding layer materials of bituminous epoxy and different basal planes and asphalt pavement interlayer
Shear strength and pull strength, health pull strength and initial value maintain like level to discovery bituminous epoxy at high temperature, and cut
Shearing stress can also further increase；Bituminous epoxy is to the high cement plate basal plane of the pull strength and shear strength of steel plate basal plane.
Wang Jie etc. selects domestic bituminous epoxy, SBS modified pitch as cement concrete bridge deck water-proof binding layer material, adopts
With under different temperatures shearing test and pull-out test evaluate the shear behavior and adhesive property of two kinds of water-proof binding layer materials,
And using the microstructure after both water-proof bond materials tearing of electron-microscope scanning experimental observation.It was found that domestic bituminous epoxy
Shear behavior and bond performance are superior to SBS modified pitch, pass through the result and simulation laboratory test result of microstructure observing
Unanimously.
Guo Jianbin selects AMP-100, SBS modified pitch, bituminous epoxy as cement concrete bridge deck water-proof tack coat material
Shearing test is respectively adopted in material, pull-out test evaluates the shear behavior and adhesive property of three kinds of water-proof binding layer materials.SBS changes
Property pitch and bituminous epoxy shear behavior and adhesive property it is suitable, be much higher than AMP-100 special-purpose water-proof binding material.
Money state equality selects SBS modified pitch as cement concrete bridge deck water-proof binding layer material, passes through shearing test
The factors such as different interface types, mormal stress, temperature, loading speed are had rated respectively to deck paving interlayer shear behavior
Affecting laws.It was found that the shearing strength of bridge floor plate surface increases with the increase of construction depth；Shearing strength is with normal direction normal pressure
Linear growth；When temperature be 60 DEG C when, shearing strength be 25 DEG C when 57.8%；With the increase of shear rate, shearing strength
Slightly reduce after first increasing.
In the application aspect of cement-base infiltration crystallization material, people are commonly utilized in the static state such as reservoir, building construction, bridge
In waterproofing work；And in the selection of cement concrete bridge deck water-proof binding layer material, people's general choice pitch class, synthesis are high
The organic waterproofs material such as molecule class.Traditional cement-base infiltration crystallization material has many advantages, such as high temperature resistant, corrosion-resistant, ageing-resistant,
And it is cheap, but its flexibility is poor, the water-proof tack coat not being suitable under moving load condition, and pitch class, synthesis macromolecule
The organic waterproofs material such as class is not only expensive, and not environmentally.Therefore, it is necessary to develop a kind of flexible preferable cement base infiltration
Saturating crystalline material is applied in cement concrete bridge deck water-proof tack coat.
Summary of the invention
To solve problems of the prior art, the present invention provides a kind of cement-base infiltration crystallization materials, including such as
Lower component:
1) component emulsion A, including pure water and acrylic acid, mass ratio 2:1；
2) B component powder, including ordinary portland cement P.O42.5 and fines, mass ratio 1:1, the fines are grain
The Machine-made Sand of diameter 0.3 ~ 2.36；
3) component C additive, including fiber, polycarboxylic acids and anhydrous sodium sulfate, mass ratio 1:1:2；
The mass ratio of the B component and component C is 20:1；The quality of the mixture and component A of the B component and component C
Than for 4:1.
The present invention also provides a kind of preparation methods of above-mentioned cement-base infiltration crystallization material, include the following steps:
1) pure water is stirred evenly with acrylic acid, obtains component emulsion A；
2) ordinary portland cement P.O42.5 is uniformly mixed with fines, obtains B component powder；
3) B component powder and component C additive are uniformly mixed；
4) it is slowly added to component emulsion A into B component powder and component C additive agent mixture, is stirred with pony mixer
2min stands 1min, is stirred for 3 ~ 5min.
The present invention also provides a kind of above-mentioned cement-base infiltration crystallization materials in cement concrete bridge deck water-proof tack coat
Application, include the following steps:
1) wet with component emulsion A on prefabricated C40 coagulating cement soil block, dosage is 100 ~ 300g/m2, room temperature
Stand 3 ~ 5 minutes；
2) the cement-base infiltration crystallization material is smeared on the coagulating cement soil block moistened, is scraped with cement flexible spatulas
Flat, thickness control is in 3 ~ 5mm；
3) it will smear coagulating cement soil block room temperature 3 ~ 6 hours of cement-base infiltration crystallization material；
4) asphalt is overlayed when cement-base infiltration crystallization material initial set state；
5) it will complete cement concrete composite samples room temperature health 14 days of asphalt.
Technical solution of the present invention can improve the flexibility of traditional cement-base infiltration crystallization material, can be applicable in
In cement concrete bridge deck water-proof tack coat under the conditions of dynamic load, and have both the resistance to of conventional cement based penetrant crystalline material
High temperature, it is corrosion-resistant, ageing-resistant, environmentally friendly and cheap the advantages that.Technical solution of the present invention has apparent economic and social benefit.
Detailed description of the invention
Fig. 1 is the shearing test figure of the composite samples of the embodiment of the present invention.
Fig. 2 is the pull-out test figure of the composite samples of the embodiment of the present invention.
Specific embodiment
Below in conjunction with specific example, the present invention will be further described, but the contents of the present invention be not limited solely to it is following
Embodiment.
Embodiment 1
Pure water is mixed with acrylic acid 2:1 in mass ratio, is stirred evenly with glass bar, component emulsion A is made；It 2) will be general
Logical portland cement P.O42.5 is uniformly mixed with fines 1:1 in mass ratio, and fines is the Machine-made Sand of partial size 0.3 ~ 2.36, and B is made
Component powder；3) fiber, polycarboxylic acids and anhydrous sodium sulfate 1:1:2 in mass ratio are uniformly mixed, component C additive is made；4)
B component powder and component C additive 20:1 in mass ratio are uniformly mixed；5) in B component powder and component C additive agent mixture
In be slowly added to component emulsion A, the mass ratio of the mixture and component emulsion A of the B component powder and component C additive is 4:
1；It is stirred 2 minutes with pony mixer, stands 1 minute, be stirred for 3 ~ 5 minutes, cement-base infiltration crystallization material is made；6) pre-
Wet with component emulsion A on the 300mm × 300mm made × 50mm C40 coagulating cement soil block, dosage is 100 ~ 300g/m2,
Room temperature stands 3 ~ 5 minutes；7) the cement-base infiltration crystallization material is smeared on the coagulating cement soil block moistened, with cement knife
It strikes off, thickness control is in 3 ~ 5mm；8) the coagulating cement soil block room temperature 3 ~ 6 of the cement-base infiltration crystallization material will be smeared
Hour, to its pre-hardening state；9) coagulating cement soil block is put into the double-deck track die trial, overlays AC-13 asphalt, makes whole
A composite samples with a thickness of 100mm；10) it by composite samples room temperature health 14 days, then demoulds.
(1) shearing test result
Composite samples are cut into 100mm × 100mm × 100mm small specimen, survey different temperatures (0,25,40,60 respectively
DEG C), under different shear rate (1,5,10,20,50mm/min) test specimen shearing strength, shearing inclination is 45 °.Different temperatures item
Shearing strength is as shown in table 1 under part, and the shearing strength under the conditions of different shear rate is as shown in table 2.
Shearing strength under 1 condition of different temperatures of table
Shearing strength under 2 different shear rate of table
By attached drawing 1 it can be seen that
Shear strength reduces rapidly as the temperature rises, at 25 DEG C shear strength relative to 0 DEG C when have dropped 37%, 60
DEG C when shear strength relative to 25 DEG C when have dropped 72%.But interface is destroyed in 0 DEG C and 25 DEG C and occurs from cement-based penetrant knot
Interface, which is destroyed, between brilliant waterproof material and cement concrete slab, at 40 DEG C and 60 DEG C occurs from cement-base infiltration crystallization waterproof material
Material asphalt between, this is because asphalt overlay in cement-base infiltration crystallization material embedded squeezing in cement matrix
In material, contact area is big, thus the cohesive force of cement-based material and asphalt is greater than and cement-based material and water when low temperature
The cohesive force of cement concrete plate；But asphalt anti-deformation is poor when high temperature, the physical space formed with cement-based material
It is destructurized, therefore shear strength when high temperature is relatively low.
Shear strength is linearly increased with the increase of shear rate, and shear strength when shear rate is 50mm/min is
1.8 times when 1mm/min, illustrate that shear rate has large effect to shear strength.
(2) pull-out test result
50mm depth is drilled into diameter 50mm core drilling machine；The drawing for surveying (0,25,40,60 DEG C) test specimen under different temperatures respectively is strong
Degree, rate of extension 10mm/min.Pull-out test the results are shown in Table 3.
Pull strength under 3 different temperatures of table
Pull strength reduces rapidly as the temperature rises it can be seen from attached drawing 2, pull strength at 60 DEG C relative to
73% is had dropped at 0 DEG C, illustrates that temperature has large effect to pull strength.Drawing destruction interface appears in anti-at 0 DEG C and 25 DEG C
Drawing destroys interface and appears in water-proof tack coat between water adhesive layer and cement concrete slab, at 40 DEG C and 60 DEG C mixes with pitch
Between material, the physical space formed this is mainly due to asphalt when high temperature and cement base is destructurized, causes to bond
Strength reduction.
(3) compound wheel tracking test result
Compound rut test piece is put into vehicle tracking test instrument, temperature is 60 DEG C, and heat preservation carried out compound track examination after 5 hours
It tests.Compound wheel tracking test the results are shown in Table 4.
The compound wheel tracking test result of table 4
As can be seen from Table 4, the dynamic stability of compound rut test piece has been more than 6000 times/mm, and deflection 2.220 is said
Bright cement-base infiltration crystallization material influences not the high-temperature behavior of its total as cement concrete bridge deck water-proof tack coat
Greatly.
Claims (1)
1. a kind of application of cement-base infiltration crystallization material in cement concrete bridge deck water-proof tack coat, it is characterised in that:
The cement-base infiltration crystallization material includes following component: component emulsion A, including pure water and acrylic acid, mass ratio are
2:1；B component powder, including ordinary portland cement P.O42.5 and fines, mass ratio 1:1, the fines be partial size 0.3 ~
2.36 Machine-made Sand；Component C additive, including fiber, polycarboxylic acids and anhydrous sodium sulfate, mass ratio 1:1:2；The B component
Mass ratio with component C is 20:1；The mass ratio of the mixture and component A of the B component and component C is 4:1；
The preparation method of the cement-base infiltration crystallization material includes the following steps: to stir evenly pure water and acrylic acid, obtains
To component emulsion A；Ordinary portland cement P.O42.5 is uniformly mixed with fines, obtains B component powder；By B component powder and
Component C additive is uniformly mixed；It is slowly added to component emulsion A into B component powder and component C additive agent mixture, use is small-sized
Blender stirs 2min, stands 1min, is stirred for 3 ~ 5min；
Application of the cement-base infiltration crystallization material in cement concrete bridge deck water-proof tack coat includes the following steps:
1) wet with component emulsion A on prefabricated C40 coagulating cement soil block, dosage is 100 ~ 300g/m2, room temperature standing 3 ~ 5
Minute；
2) the cement-base infiltration crystallization material is smeared on the coagulating cement soil block moistened, is struck off with cement flexible spatulas, it is thick
Degree control is in 3 ~ 5mm；
3) it will smear coagulating cement soil block room temperature 3 ~ 6 hours of cement-base infiltration crystallization material；
4) asphalt is overlayed when cement-base infiltration crystallization material initial set state；
5) it will complete cement concrete composite samples room temperature health 14 days of asphalt.
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| CN201710056136.8A CN106810163B (en) | 2017-01-25 | 2017-01-25 | A kind of cement-base infiltration crystallization material and its application in cement concrete bridge deck water-proof tack coat |
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| CN201710056136.8A CN106810163B (en) | 2017-01-25 | 2017-01-25 | A kind of cement-base infiltration crystallization material and its application in cement concrete bridge deck water-proof tack coat |
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| CN109336497B (en) * | 2018-10-18 | 2022-04-19 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Polymer cement mortar and repairable railway concrete bridge floor waterproof structure |
| CN112248575A (en) * | 2020-10-22 | 2021-01-22 | 河南蓝翎环科防水材料有限公司 | Root-resistant polymer siphon drainage and water storage sheet and production process thereof |
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| CN103482934B (en) * | 2013-09-13 | 2016-01-06 | 周建平 | A kind of cement-base waterproof coating |
| CN104003673B (en) * | 2014-05-19 | 2015-12-30 | 青岛天源伟业保温防水工程有限公司 | A kind of underground installation rigid-flexible composite waterproofing and leakage-stopping emulsion |
| CN105463990B (en) * | 2015-11-19 | 2017-03-22 | 东南大学 | steel bridge deck paving structure and method |
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