CN104878743B - A kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material and construction method thereof - Google Patents
A kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material and construction method thereof Download PDFInfo
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- CN104878743B CN104878743B CN201510132000.1A CN201510132000A CN104878743B CN 104878743 B CN104878743 B CN 104878743B CN 201510132000 A CN201510132000 A CN 201510132000A CN 104878743 B CN104878743 B CN 104878743B
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- 238000005260 corrosion Methods 0.000 title claims abstract description 67
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- 239000011347 resin Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 13
- 239000003999 initiator Substances 0.000 claims abstract description 6
- 239000000049 pigment Substances 0.000 claims abstract description 6
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 6
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 6
- 230000007797 corrosion Effects 0.000 claims description 17
- 239000010941 cobalt Substances 0.000 claims description 11
- 229910017052 cobalt Inorganic materials 0.000 claims description 11
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 11
- 229920006241 epoxy vinyl ester resin Polymers 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical group CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 238000005253 cladding Methods 0.000 claims description 9
- 239000013521 mastic Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 8
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
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- 229910002012 Aerosil® Inorganic materials 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 8
- 230000002421 anti-septic effect Effects 0.000 abstract description 5
- 239000011152 fibreglass Substances 0.000 description 31
- 238000009792 diffusion process Methods 0.000 description 22
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- 238000000576 coating method Methods 0.000 description 18
- 239000010410 layer Substances 0.000 description 18
- 239000011248 coating agent Substances 0.000 description 17
- 239000013535 sea water Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 239000004567 concrete Substances 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 8
- 241000370738 Chlorion Species 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 229930185605 Bisphenol Natural products 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- 229910000831 Steel Inorganic materials 0.000 description 3
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- 238000000205 computational method Methods 0.000 description 3
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- 238000002474 experimental method Methods 0.000 description 3
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- 239000010959 steel Substances 0.000 description 3
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- 238000010998 test method Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
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- 239000011780 sodium chloride Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HEJCZAMFVMNFLC-UHFFFAOYSA-N 10-oxo-10-(2,2,6,6-tetramethylpiperidin-4-yl)oxydecanoic acid Chemical class CC1(C)CC(OC(=O)CCCCCCCCC(O)=O)CC(C)(C)N1 HEJCZAMFVMNFLC-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The present invention provides a kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material, by weight percentage, including following component: resin 40 ~ 60%；Pigment 0.3 ~ 1%；Thixotropic agent 1 ~ 3%；Ultra-violet absorber 0.3 ~ 0.7%；Initiator 1 ~ 2.5%；Accelerator 0.1 ~ 1.5%；Glass fabric 35 ~ 55%.The present invention still further provides the construction method of this kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material.A kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material that the present invention provides, easy construction, once construct and i.e. can reach the required thickness of ocean engineering pile foundation anticorrosive coat design, short construction period, environmentally friendly；High with pile foundation surface adhesion strength, difficult drop-off, antiseptic property is excellent, has high-durability, ensure that pile foundation can meet the requirement in 50 years chloride-penetration resistance life-spans in marine environment.
Description
Technical field
The invention belongs to ocean engineering pile foundation technical field of anticorrosion, relate to a kind of ocean engineering pile foundation anti-corrosion material and construction thereof
Method, is specifically related to a kind of high-durability ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material and construction method thereof.
Background technology
At present, conventional in ocean engineering prestressed reinforced concrete pile foundation mainly has Big Pipe Pile and PHC pile tube.Due to,
The problem that pile foundation durability that in seawater, Chloride Attack causes declines, pile foundation shortens service life is in ocean engineering circle extremely
Concern.It is known that the chlorion in seawater is strong corrosive material, the prestressed reinforced concrete being directly exposed in seawater
Big Pipe Pile and PHC pile tube, when salinity penetrate into concrete reach rebar surface when, can cause steel bar corrosion, reinforcing bar volumetric expansion,
Make concrete spalling, peel off, cause structural deterioration.Being particularly in the pile foundation of tidal range section, to be directly in seawater corrosion the tightest
The region of weight, is the position that total subjects to erosion damage most, and pile foundation durability also becomes restriction large ocean engineering knot
The Pinch technology in structure service life.
Prior art generally uses high performance concrete, corrosion inhibitor and increase protective layer thickness etc. from concrete body material
Measure improves the durability of Big Pipe Pile and PHC pile tube.Use the above-mentioned technical measures from concrete material body, can guarantee that
The service life of prestressed reinforced concrete pile foundation reaches 50 years.But with improving constantly that construction quality requires, some are large-scale
The design of ocean engineering proposes the even higher requirement of 100 years design reference periods, only from concrete body material, for
Improve the durability limited use of pile foundation structure, it is impossible to meet high-durability design and require.In order to ensure pile foundation 100 years
Service life, it is necessary to use additional anti-corrosion mode, and additional anti-corrosion mode should not be sent out in being on active service in marine environment 50 years
Raw chloride permeability.Wherein, improve the durability of prestressed reinforced concrete pile foundation, extend service life the most frequently used, effective
Additional anti-corrosion mode be at pile foundation external coating anticorrosive coating, form certain thickness corrosion-inhibiting coating, by pile foundation with sea
Water segregation comes, from chloride ion corrosion.
The conventional anticorrosive paint of pre existing stress steel bar concrete pile plinth mainly has acrylic coating, polyurethanes coating and changes
Property epoxy resin coating etc..According to the regulation of China's relevant criterion and specification, the chloride-penetration resistance longevity of these coatings of 500 μ m-thick
Life generally 10～20 years, it is impossible to meet high-durability requirement for anticorrosion.And face coat is it is generally required to primer coating, intermediate coat
With the step such as finish paint, and next layer of coating construction, construction complexity can be carried out after requiring every layer of dry solidification；Coating one simultaneously
Road construction thinner thickness, needs multiple tracks construction can reach design and requires by about 50～100 μm, long construction period；Resisting of coating
Ultraviolet ageing performance and poor mechanical property, easily produce stress cracking and cause coating shedding, lose protection effect.
Therefore, for the pile foundation anti-corrosion measure having 50 years and above chloride-penetration resistance requires, if using anticorrosion to apply
The protection method of layer, needs repeatedly to keep in repair in pile foundation during one's term of military service, and guarantee pile foundation is not destroyed by seawater corrosion.Coating
Maintenance more complicated, and maintenance cost is high, and the maintenance step of coating includes former cated rooting out, the surface of pile foundation
Process, apply the coating etc. refreshing.During maintenance, coating can not be with contact with sea water before dry solidification, and otherwise coating cannot be dried
Solidification, is required for greatly multiple tracks construction due to coating, and field maintenance almost becomes impossible mission.
So, now desire to propose a kind of new high-durability ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material and
Construction method, it is desirable to short construction period, mechanical strength are high, resistance to corrosion seawater is good, it is ensured that pile foundation do not occur in 50 years chlorine from
Son infiltration.
Content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of ocean engineering prestressed reinforced concrete
Pile foundation anti-corrosion material and construction method thereof, prevented by using a kind of high-durability ocean engineering prestressed reinforced concrete pile foundation
Rotten material and construction method thereof, be used for solving the defect of prior art floating coat anti-corrosion measure, and can realize ocean engineering 100 years
The technology of projected life requires.
For achieving the above object and other related purposes, one aspect of the present invention provides a kind of ocean engineering prestressed reinforced concrete stake
Basis anti-corrosion material, by weight percentage, including following component:
Preferably, described resin is epoxy vinyl ester resin.
It is highly preferred that described epoxy vinyl ester resin is selected from bisphenol type epoxy vinyl ester resin MFE-2, bisphenol A-type ring
Any one in oxyethylene group ester resin M FE-711.Described epoxy vinyl ester resin can use methyl ethyl ketone peroxide and different pungent
Acid cobalt reacts solidification at normal temperatures, and wherein, methyl ethyl ketone peroxide and cobalt iso-octoate can occur redox reaction, produce free radical,
And then cause resin to carry out Raolical polymerizable.
Preferably, described pigment is selected from copper-chrome black, carbon black, any one in iron oxide black.
Preferably, described thixotropic agent is selected from aerosil, polyamide wax, any one in organobentonite.
Preferably, described ultra-violet absorber is just pungent selected from double (2,2,6,6-tetramethyl-4-piperidyl) sebacates, 2-hydroxyl-4-
Any one in epoxide benzophenone.
Preferably, described initiator is methyl ethyl ketone peroxide.
It is highly preferred that the active o content of described methyl ethyl ketone peroxide is 8.0～9.0wt%.
Preferably, described accelerator is cobalt iso-octoate.
It is highly preferred that the available cobalt of described cobalt iso-octoate is 0.5～1.0wt%.
Preferably, described glass fabric is in medium alkali fiber cloth CWR400D, alkali-free glass fiber cloth EWR400
Any one.
It is highly preferred that described glass fabric possesses following feature: grammes per square metre is not less than 350g/m2, warp-wise ultimate strength is not less than
1400N/2.5cm, broadwise ultimate strength is not less than 1200N/2.5cm.
Second aspect present invention provides a kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material in ocean engineering pile foundation
Application in anticorrosion.
Third aspect present invention provides the construction method of a kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material, including
Following steps:
1) removing surface of stake: remove the spot on prestressed reinforced concrete stake surface, uses resin-bonded mastic to apply on stake surface
Solidify after smearing, stand-by；
Preferably, described spot be prestressed reinforced concrete stake surface need to be coated with the greasy dirt in district and other fouls, bleeding cement and
Other loose materials.
Preferably, each component and the weight portion of described resin-bonded mastic is: epoxy vinyl ester resin 100 parts, methyl ethyl ketone peroxide
1.5 parts, cobalt iso-octoate 0.5 part, cement 100 parts.
It is highly preferred that described epoxy vinyl ester resin is selected from bisphenol type epoxy vinyl ester resin MFE-2, bisphenol A-type ring
Any one in oxyethylene group ester resin M FE-711.
It is highly preferred that the active o content of described methyl ethyl ketone peroxide is 8.0～9.0wt%.
It is highly preferred that the available cobalt of described cobalt iso-octoate is 0.5～1.0wt%.
It is highly preferred that described cement is strength grade is the Portland cement of 42.5 grades.
Preferably, described resin-bonded mastic stake surface smear refer to use resin-bonded mastic fill up, floating stake surface defect, make a table
Face is smooth.
Preferably, described hardening time is 12-24h.It is highly preferred that described hardening time is 24h.
2) preparation of resin adhesive liquid: by proportioning take pigment, thixotropic agent, ultra-violet absorber, accelerator are sequentially added into resin
In stir, then add initiator while stirring, to be mixed uniformly after stand；
Preferably, described mixing time is respectively 1-2min.
Preferably, in whole glue process for preparation, described stir speed (S.S.) is 800～1000r/min.
Preferably, described time of repose is 3-5min.It is highly preferred that described time of repose is 5min.
3) cladding of Corrosion Protection of Fiber Reinforced Plastics floor: in step 1) stake surface after cleaning need to be coated with district and uniformly brush a floor step
2) resin adhesive liquid prepared, then it is wound around layer of glass cloth, repeatedly after above-mentioned steps, at outermost layer
Uniformly brush one layer of step 2 again) resin adhesive liquid prepared, outside this layer, it is then wound around a strata ester film；
Preferably, should strain when described glass fabric is wound, and use scraper plate to strike off glass fabric, winding completes
After, use froth breaking roller to carry out roll-in.Can effectively get rid of the visible bubble in bubble between glass fabric and resin boundary surface.
Preferably, the number of times of described repetition step is 4 times.
Preferably, after described polyester film is wound, scraper plate is used to strike off polyester film.Can effectively get rid of polyester film
And the visible bubble in bubble between resin boundary surface.
4) by surface through step 3) cladding after prestressed reinforced concrete stake place a period of time, can use.
Preferably, step 4) in, described prestressed reinforced concrete stake carries out carrying operation after placing 12-24h.
It is highly preferred that described prestressed reinforced concrete stake carries out carrying operation after placing 24h.
Preferably, step 4) in, described prestressed reinforced concrete stake carries out piling work after placing more than or equal to 7 days.
It is highly preferred that described prestressed reinforced concrete stake carries out piling work after placing 7 days.
As described above, a kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material of the present invention and construction method thereof, first
First, by using optimal component formula, and use the construction method of optimal conditions, molding mode flexibly, construction simple, one
Secondary construction i.e. can reach the thickness that design requires, cladding thickness reaches 2.0mm, and short construction period is environmentally friendly.Secondly,
The mechanical strength of this anti-corrosion material is high, is not likely to produce stress cracking, and its bending strength is not less than 450MPa；With pile foundation surface
Adhesion strength is high, difficult drop-off, is not less than 3.3MPa as the hardness Ageing that interface binding intensity characterizes.Finally, this preserving timber
The antiseptic property of material is excellent, and chloride diffusion coefficient reaches 2.50 × 10-11cm2/ below s, and 50 can be met in marine environment
The requirement in year above chloride-penetration resistance life-span, has high-durability, ensure that pile foundation in 50 years not by seawater corrosion.
Therefore, the present invention proposes high-durability ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material and construction method and painting
Layer anti-corrosion measure is compared has huge advantage, is with a wide range of applications at ocean engineering pile foundation corrosion-resistant field.
Brief description
The construction technology process of a kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material that Fig. 1 is shown as the present invention shows
It is intended to.
Fig. 2 is shown as the one side diffusion matter of a kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material sample of the present invention
Quantitative change rate and the relation schematic diagram of time.
Fig. 3 is shown as the mass change of a kind of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material sample of the present invention
With time relationship schematic diagram.
Detailed description of the invention
The present invention is expanded on further below in conjunction with specific embodiment, it should be appreciated that these embodiments are merely to illustrate the present invention and need not
In limiting the scope of the invention.
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by disclosed by this specification
Content understand other advantages and effect of the present invention easily.The present invention can also be added by additionally different detailed description of the invention
To implement or to apply, the every details in this specification also can be based on different viewpoints and application, in the essence without departing from the present invention
Carry out various modification or change under Shen.
The experiment material using in following example all can be bought on market.
Embodiment 1～embodiment 3
1st, experimental technique
Remove clean prestressed reinforced concrete pipe pile surface and need to be coated with the greasy dirt in district and other fouls, bleeding cement and other are loose
Thing.Then, use resin-bonded mastic fill up, floating stake surface defect, make a surfacing.Wherein, each component of resin-bonded mastic
And weight portion is: epoxy vinyl ester resin 100 parts, methyl ethyl ketone peroxide 1.5 parts, cobalt iso-octoate 0.5 part, cement 100 parts.
After the resin-bonded mastic solidification preferred 24h of 12-24h, start coated with glass fibre reinforced plastics.Meanwhile, by proportioning take pigment, thixotropic agent,
Ultra-violet absorber, accelerator are sequentially added in resin and stir, then add initiator while stirring, to be mixed uniformly rear quiet
Put the preferred 5min of 3-5min, obtain resin adhesive liquid.In whole glue process for preparation, mixing time is respectively 1-2min, described
Stir speed (S.S.) is 800～1000r/min.
According to hand pasting forming mode, first need to be coated with district on the stake surface after cleaning and uniformly brush a floor resin adhesive liquid, then be wound around one
Layer glass fabric, should strain when being wound around glass fabric, and use scraper plate to strike off glass fabric, is wound around after completing, makes
Carry out roll-in with froth breaking roller, can effectively get rid of the visible bubble in bubble between glass fabric and resin boundary surface.Repeatedly above-mentioned step
After Zhou, uniformly brush one layer of resin adhesive liquid again at outermost layer, outside this layer, be then wound around a strata ester film, and strike off with scraper plate,
Effectively get rid of the visible bubble in bubble between polyester film and resin boundary surface.Wherein, the number of times repeating step is 4 times, thus forms five
The Corrosion Protection of Fiber Reinforced Plastics layer of layer resin four-layer glass fiber cloth.
Carrying operation can be carried out after the preferred 24h of 12-24h is placed in prestressed reinforced concrete stake after coated for surface process,
Piling work can be carried out after placing the prestressed reinforced concrete stake after coated for surface process more than or equal to 7 days.Wherein, shape
The composition and the percentage by weight that become the raw material components of the anti-corrosion material of Corrosion Protection of Fiber Reinforced Plastics layer are as shown in table 1.
Ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material formula table in table 1 embodiment 1-3
2nd, chloride-penetration resistance life test and computational methods
2.1 fiberglass chloride-penetration resistance Life Calculating Methods
The anti-corrosion material proposing in the present invention is the excellent glass fiber reinforced plastics composite material of antiseptic property.Chlorion in seawater is to fiberglass
The diffusion of composite inner meets Fick the second diffusion law:
In formula, C dispersive medium concentration；
T diffusion time；
By the concentration gradient in surface along orthogonal surface direction；
D diffusion coefficient.
It when D is unrelated with C, is preferable disperse state:
We assume that the thickness of fiberglass protective layer is infinity, then primary condition and boundary condition are:
C (x, t)=C0,；
C (0, t)=Cs；
C (∞, t)=C0；
In formula, the thickness of x fiberglass, dispersal direction is positive direction, x >=0；
T diffusion time, s；
C0The initial concentration of the internal chlorion of fiberglass, %；
Cs glass fiber reinforced plastic surface chlorine ion concentration, %；
According to Boundary Condition for Solving partial differential equation, result is:
In formula, the chlorine ion concentration at the internal x of fiberglass, % during C time t；
For Gauss error function.
Being a Normalized Ratio, its span is [0,1], and the mean value 1/2 that can round a diffusion process is retouched
State the average diffusion process occurring in whole diffusion process, namely:
According to the character of Gauss error function, as η 0.6:
η≈erfη (1-5)
So,
That is:
This formula is being assumed to obtain under conditions of fiberglass coating thickness is infinite thickness, actually fiberglass clad
Thickness is not unlimited, but for the chlorion in diffusion, the thickness of clad has no effect on the dispersal behavior of chlorion,
The chlorion of diffusion in the fiberglass in infinite thickness is taken out in a certain concrete thickness, and the dispersal behavior of chlorion is not by shadow
Ring.It is to say, this formula also applies to the fiberglass clad of finite thickness.
Diffusion coefficient can be calculated as follows by fiberglass mass change in the seawater:
In formula, x is the thickness of fiberglass sample；
M∞For the biggest quality rate of change of fiberglass sample, %；
M1For fiberglass sample t1The mass change of time, %；
M2For fiberglass sample t2The mass change of time, %.
For mass change linear fit slope of a curve, by calculated diffusion coefficient, can according to formula (1-7)
Calculate the chloride-penetration resistance life-span of fiberglass.
2.2 chloride diffusion coefficient computational methods
Be coated on the Corrosion Protection of Fiber Reinforced Plastics layer on pile foundation surface under arms during, only outer surface and contact with sea water, inner surface and drying
Pile foundation face seal bonding, seawater is unidirectional to the diffusion within fiberglass.For by fiberglass matter in the seawater
Quantitative change rate calculates one direction diffusion coefficient, needs to carry out the mass change test that fiberglass sample one side in the seawater soaks.
2.2.1 test method
" fiberglass reinforced plastics water absorbing properties is real by standard GB/T/T1462-2005 for the test of fiberglass sample mass rate of change
Proved recipe method " carry out, test(ing) medium is 3.5% mass fraction NaCl solution, and test temperature is 25 DEG C.Mass change WtPress
Following formula calculates:
In formula, M0For the initial mass of fiberglass sample, MtThe quality of fiberglass sample is tried when being t for soak time.
Fiberglass sample one side diffusing qualities rate of change is tested: by remaining 5 face in addition to upper surface of fiberglass sample with water-fast
Carry out soak test after epoxy resin cladding.
Fiberglass sample biggest quality rate of change is tested: 6 faces of fiberglass sample are not all coated with water-fast epoxy resin and are directly placed into molten
Liquid soaks, rendering quality rate of change and time (s1/2) relation curve, curve peak is the change of the fiberglass sample biggest quality
Rate.
2.2.2 water absorption rate result
As a example by the anti-corrosion material of embodiment 3 preparation in table 1, fiberglass sample one side in 3.5% mass fraction NaCl solution
Diffusing qualities rate of change and time (s1/2) relation as in figure 2 it is shown, biggest quality change rate curve and time (s1/2) relation such as Fig. 3
Shown in.
2.3 chloride-penetration resistance life-spans calculated
By the biggest quality rate of change data of curve shown in slope of a curve shown in Fig. 2, Fig. 3, according to above-mentioned formula (1-8)
Calculate the diffusion coefficient of anti-corrosion material in embodiment 3, bring above-mentioned formula (1-7) into, calculate the anti-chlorine of anti-corrosion material in embodiment 3
Ion permeates the life-span, and uses vernier caliper measurement cladding thickness；Concrete data result is shown in Table 2.
The diffusion coefficient of table 2 anti-corrosion material and theoretical service life
From table 2, in the present invention, in embodiment 3, the chloride-penetration resistance life-span of anti-corrosion material, more than 50 years, has higher
Durability, disclosure satisfy that the requirement to 50 years chloride-penetration resistance life-spans of anti-corrosion material for the offshore engineering structure, in high-durability ocean
Engineering prestressed reinforced concrete pile foundation corrosion-resistant field is with a wide range of applications.
3rd, the performance test results
By embodiment 1-3 proportioning in table 1, the ocean engineering prestressed reinforced concrete stake preparing respectively according to above-mentioned construction procedure
Basis anti-corrosion material, after solidifying 7 days, strips aliquot and carries out performance test.According to standard GB/T/T 1449-2005
The bending strength of " fibre reinforced plastics bending property test method " test sample；According to standard GB/T/T 50367-2006
The hardness Ageing of annex F test sample in " concrete structure reinforcement design specification "；Use vernier caliper measurement cladding thickness；
And according to the chloride-penetration resistance life-span (Fick the second diffusion law) providing computational methods to calculate sample in aforesaid clause 2 and chlorine
Ionic diffusion coefficient；Correlated performance data the results are shown in Table 3.
The performance of table 3 anti-corrosion material and chloride-penetration resistance life-span
It is simple that the high-durability anti-corrosion material being proposed from table 3, the present invention and construction method thereof have construction, and once construction is
Can reach the cladding thickness 2.0mm that design requires.The mechanical strength of this anti-corrosion material is high, and bending strength is not less than 450MPa；
High with pile foundation surface adhesion strength, it is not less than 3.3MPa as the hardness Ageing that interface binding intensity characterizes.This anti-corrosion material
Antiseptic property is excellent, and chloride diffusion coefficient reaches 2.50 × 10-11cm2/ below s, the chloride-penetration resistance life-span all more than 50 years,
Having higher durability, disclosure satisfy that the performance requirement to anti-corrosion material for the offshore engineering structure, high-durability ocean engineering in advance should
Power steel bar concrete pile plinth corrosion-resistant field is with a wide range of applications.
Embodiment 4～embodiment 6
Use such as experimental technique identical in above-described embodiment 1～embodiment 3, wherein, form the anti-corrosion material of Corrosion Protection of Fiber Reinforced Plastics layer
The composition of raw material components and percentage by weight as shown in table 4.
Ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material formula table in table 4 embodiment 4-6
The ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material that in employing table 4 prepared by compositing formula, has and embodiment
The results of property that in 1～embodiment 3, table 3 is close, it may have it is excellent that mechanical strength is high, interface binding intensity high, antiseptic property is good
Point, the chloride-penetration resistance life-span of anti-corrosion material, more than 50 years, has higher durability, disclosure satisfy that offshore engineering structure pair
The performance requirement of anti-corrosion material.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for the restriction present invention.It any is familiar with this skill
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage of art.Therefore, such as
All that in art, tool usually intellectual is completed under without departing from disclosed spirit and technological thought etc.
Effect is modified or changes, and must be covered by the claim of the present invention.
Claims (6)
1. an ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material, by weight percentage, including following component:
Described resin is epoxy vinyl ester resin；Described pigment is selected from copper-chrome black, carbon black, any one in iron oxide black；
Described thixotropic agent is selected from aerosil, polyamide wax, any one in organobentonite；Described ultra-violet absorber selects
Any one in bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate, UV-531；Described
Initiator is methyl ethyl ketone peroxide；Described accelerator is cobalt iso-octoate.
2. ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material according to claim 1, it is characterised in that described
Glass fabric is selected from any one in medium alkali fiber cloth CWR400D, alkali-free glass fiber cloth EWR400.
3. the ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material according to claim 1-2 is arbitrary is in ocean engineering stake
Application in the anticorrosion of basis.
4. the construction method of the ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material according to claim 1-2 is arbitrary,
Comprise the steps:
1) removing surface of stake: remove the spot on prestressed reinforced concrete stake surface, uses resin-bonded mastic after stake surface smear
Solidification, stand-by；
2) preparation of resin adhesive liquid: by proportioning take pigment, thixotropic agent, ultra-violet absorber, accelerator are sequentially added in resin and stir
Mix uniformly, then add initiator while stirring, uniformly rear standing to be mixed；
3) cladding of Corrosion Protection of Fiber Reinforced Plastics floor: in step 1) stake surface after cleaning need to be coated with district and uniformly brush a floor step 2)
The resin adhesive liquid of preparation, then it is wound around layer of glass cloth, repeatedly after above-mentioned steps, uniformly apply again at outermost layer
One layer of step 2 of brush) resin adhesive liquid prepared, outside this layer, it is then wound around a strata ester film；
4) by surface through step 3) cladding after prestressed reinforced concrete stake place a period of time, can use.
5. the construction method of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material according to claim 4, its feature
It is, step 1) in, each component of described resin-bonded mastic and weight portion be: epoxy vinyl ester resin 100 parts, mistake
MEKP 1.5 parts, cobalt iso-octoate 0.5 part, cement 100 parts.
6. the construction method of ocean engineering prestressed reinforced concrete pile foundation anti-corrosion material according to claim 4, its feature
It is, step 2) in, described mixing time is 1-2min；Described stir speed (S.S.) is 800～1000r/min；Described standing
Time is 3-5min.
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| CN105203403B (en) * | 2015-09-16 | 2018-01-12 | 中交上海三航科学研究院有限公司 | A kind of detection method of glass fiber reinforced plastics composite material Frost Resistance energy |
| CN105862723B (en) * | 2016-04-01 | 2018-03-02 | 江苏东浦管桩有限公司 | Water conservancy construction prestressed concrete plate stake |
| CN106832794A (en) * | 2016-12-29 | 2017-06-13 | 浙江诺比高分子材料有限公司 | A kind of vinylite being easy to concrete binding |
| CN106948327A (en) * | 2017-05-02 | 2017-07-14 | 江苏慧天新能源科技有限公司 | A kind of steel construction ocean coats the preparation method of anti-corrosion glass fiber reinforced plastic protective cover |
| CN113337148A (en) * | 2021-06-09 | 2021-09-03 | 黄山钛可磨工业介质有限公司 | Environment-friendly water-based anticorrosive coating for autoclaved aerated concrete slab steel bars |
| CN114396292A (en) * | 2021-12-21 | 2022-04-26 | 中交上海三航科学研究院有限公司 | Concrete anticorrosion material for suspended tunnel pipe section and anticorrosion method |
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