CN207974002U - Quantification can reversed application concrete functional coating - Google Patents

Abstract

The utility model is related to a kind of quantification can reversed application concrete functional coating, can have the function of quantification display concrete cracks width with Quantitative design cracking resistance.This coat system can positive application can also reversed application.The coat system is from outward appearance to inner essence to be followed successively by face coat based on the physical model of a ladder elastic coating structure, provides weather resistant protection or other functions；Middle low elasticity coating plays important transitional function of forming a connecting link；High resiliency inter coat undertakes the Major Function that can resist concrete cracking crack；Concrete enclosing primary coat coating.The elasticity of the wherein above three layer coating of sealing bottom coating is successively successively decreased upwards, from large to small.It can be applied to the protection, crack improvement or the other features coatings of concrete surface of concrete works.

Description

Quantification can reversed application concrete functional coating

Technical field

The utility model is related to it is a kind of can with Quantitative design, with quantification display function, can be with positive and negative two-way painting The concrete functional coating technology and implementation of dress.It is renovated for the protection of concrete structural surface, repairing concrete crack And other features coatings.Belong to special functional coating and coating project field.

Background technology

Armored concrete is always by it is believed that be securely durable material.Age in last century 70-80 American-European-Japanese equal countries Start to recognize the existing seriousness corroded with carbonization problem of concrete structure, propose simultaneously using epoxy resin, polyurethane etc. The means of defence that organic coating coats concrete surface.It can reduce or prevent in this way carbon dioxide, sulfur dioxide, vapor Equal pernicious gases invade concrete.Ensure the durability of the concrete structures such as bridge.

Coastal area of china and the corrosion of interior ground concrete-bridge are extremely serious.It concern to concrete surface coating protection and answers At the beginning of starting from 21 century.Transportation industry professional standard JT/T695-2007 has been promulgated in 2007《Concrete bridge structure surface Coating antiseptic loses application techniques condition》.Coating protection work is proceeded by emphasis concrete-bridge engineering.Existing concrete table Surface protection technique is usually using epoxy resin or polyurethane primary coat as sealing bottom coating, and epoxy-mica aoxidizes iron-dope, epoxy glass Glass flake paint etc. is inter coat, and aliphatic polyurethane coating applies for face.Construction of Hangzhou Bay Cross-sea Bridge from Ningbo to Shanghai is The bridge concrete structure organic protection coating that a series of important bridges of main representative are implemented mostly uses this coating system. But these coatings belong to rigid coating.

Almost without the concrete not split.In Practical Project, the raw material types that concrete structure uses are more, work progress Again very long cumbersome, structure type is various, withstands forces complex shape, and use environment condition is changeable.These factors may all cause to mix Solidifying soil cracking seam.It can cause crack under load action.Indirectly-acting under non-load can also cause crack, as forced deformation tension is answered Become lower fault and fissures, concrete setting contraction fissure, restraint stress crack caused by the temperature difference is forced to constrain caused by displacement and be answered Become crack, crack caused by defect of designing and constructing.Under durability environmental activity, concrete can gradually be carbonized or neutralisation. Carbonization causes the reduction of concrete alkalinity.When pH value is less than 12, reinforcing bar can take off passivation.And then electrochemical corrosion occurs, cause steel Muscle corrosion, volume expansion cause being split up for concrete.

The carbonization of concrete.It is the master for causing carbonization that carbon dioxide generates calcium carbonate with the calcium hydroxide reaction in concrete Want reason.Chlorion, sulfur dioxide, nitrogen oxides, sulfate ion in air not only can all be reduced with calcium hydroxide reaction PH values, and these media itself are all the factors for causing reinforcement corrosion.

Concrete must crack, and rigid coating is to be difficult to resist the cracking crack of concrete.

The use of Epoxy Resin Coated Steel Bars is another anti-corrosion method in armored concrete.

North America region has begun to the R＆D work of Epoxy Resin Reinforcement early in five sixties of 20th century, and obtains Application effect.China starts coated reinforcement in latter stage in last century and is studied with corresponding powder and application techniques, has formulated related coating Reinforcing bar《Epoxy Resin Coated Steel Bars》(JG3042-1997) professional standard.Being intended to can be all kinds of to China by this technology transfer In Larger Engineering Projects.

Currently, epoxy coating is mainly used for the spiral anti-corrosion in reinforced concrete structures.A kind of approach is to use On assembly line in electrostatic spraying to the reinforcing bar of preheating, epoxy-coated reinforcement is made after curing water cooling in epoxide powder coating.Due to Epoxy Resin Coated Steel Bars are on the high side, and from factory to casting concrete before to undergo transport and (easily lead to flexural fatigue Destroy), it cuts and (forms new fracture) and tie up multiple working procedures such as (coating friction destructions), these processes can coat reinforcing bar Layer has adverse effect on, and the epoxide resin material surface after in addition more importantly hardening is more smooth, and surface energy substantially reduces, Bond stress between the concrete with after-pouring is poor, and bond strength can not become more difficult compared with ordinary reinforced concrete The difficult problem gone beyond.In addition reinforcing bar coating epoxy coating can't resolve the carbonization and corrosion of concrete itself.So while system Several standards are determined, but the precoating coating technique that batch production is carried out using organic materials such as this based epoxy resins fails to obtain always It is extensive to promote and apply.

Concrete surface protects the conventional urethane coating used, epoxy coating only to have limited flexibility.These Rigid coating can be when concrete surface cracks crack, and coating is also followed by fracture cracking.Vapor, carbon dioxide, chlorion, Sulfur dioxide, sulfate ion, nitrogen oxides can all invade crack, cause the erosion to concrete crack, and corruption is formed to reinforcing bar Erosion threatens.And this corrosion is exactly the accelerated corrosion under big cathode primary anode, is to local threat bigger once occurring Corrosion.Therefore rigid coating is difficult to fully and effectively concrete protection structure.

In the 1970s, there is spray polyurethane elastic body (SPU), but in force, system is easy and surrounding ring Moisture, moisture reaction in border, generate carbon dioxide bubble.Coating material mechanical properties decrease, it is unstable.Later in resin group It is added Amino End Group compound in point, i.e. spraying polyurethane urea elastomers (SPU (A)), the polyurea structure of this half polyurethane/half can be with Reduce or ignore under certain drying condition isocyanates and moisture, moisture reacts.Coating material mechanical property obtains centainly Improve.But polyurethane-urea uses in the high environment of relative humidity, gathers still without the foaming problems for fundamentally solving system Urethane urea is still susceptible to coating quality issues.Spray Polyurea Elastomer (SPUA) technology 1986 is by Texaco companies of the U.S. It succeeds in developing, pure polyureas elastic coating has broken away from the influence of moisture and moisture, has outstanding mechanical property.

Publication in 2009《The provisional technical conditions of Beijing-Shanghai High-Speed Railway bridge concrete bridge floor spray polyurea waterproof coating》 With《The provisional technical conditions of passenger dedicated railway line bridge concrete bridge floor spray polyurea waterproof coating》It proposes and uses 1.8mm-2mm It is micro- to be then coated with 200 as overhead bridge floor waterproof coating for the Spray Polyurea Elastomer coating or polyurethane-urea elastic coating of thickness Elongation at break >=200% of rice film thickness, the method for the aliphatic elastic polyurethane coating of tensile strength >=4.0MPa.It is this poly- Urea elastomers coating has the characteristics that >=400% elongation at break and fast solidification.With the property for resisting concrete bridge deck cracking Energy.There are some coating ill-conditioning problems in use in this coat system.Stop in state-owned railroads authorities notice in 2014 Use spray polyurea.

The problem of high ferro spray polyurea waterproof coating is to combine force difference first.The gel time of spray polyurea is too short at present, Only several seconds to more than ten seconds or so, polyurea liquid particle, which has little time fully to soak on by painting matrix, to lose flowability, and coating exists Interface is readily generated gas-solid phase, i.e. air void, affects the binding force of coating.This is that high ferro polyurea water-proof coating is caused to send out It is raw be bubbled, remove, the disease that falls off the main reason for one of.And technically gel is fast, quick solidifying is that this material is solid for pure polyureas There is feature, and to realize slow hardening glue and slow solidification has larger technical difficulty.

Secondly in order to protect aromatic spray polyurea not by illumination ageing, high untouchable painting uses aliphatic polyurethane bullet Property coating.The guarantor of aliphatic polyurethane coating is typically 5 years or so in the light service life.The specification of various aircraft skin coatings is almost The overhaul of five Nian Houhui factories of aircraft flight is all defined, old polyurethane paint is removed, japanning is this reason again.Elastic polyurethane Strand is elongated, sacrifices certain weatherability while having elastic again.After high ferro circuit runs 5 or six years, face coat starts always Change, polyurea layer is difficult to obtain intact effective protection.Light aging will occur for polyureas, xanthochromia, dusting occur.

Furthermore although current high ferro polyurea water-proof coating has high resiliency, concrete new life crack can be resisted, is played Prevent water from penetrating into the effect of concrete.But this elastic coating, which can cover concrete road bed and sleeper generation under coating, is more than The phenomenon that standard criterion defined fracture width so that the exceeded crack of high-speed rail bridge cannot get timely grouting reinforcing finishing, exist Security risk.

High ferro is once run, and repair can only be carried out in night very short time window, this brings very disaster to maintenance maintenance Degree.After opening operation, service personnel has found several high-speed railways, and " disease " occurs in bridge floor polyurea water-proof layer, some waterproof layers Xanthochromia, cracking, breakage, stripping, some bridge floors even large area is damaged, and monoblock starts, this makes the safe operation of bullet train At threat.The problem of existing high ferro polyurea coating binding force and durability of coating, brings trouble to later maintenance repair.

The crack of existing Rail Highway concrete-bridge needs repairing reparation.Such as to 0.2-0.3mm or more width crack office Portion's perfusion, closing are a kind of method for normalizing.To existing 0.2mm crackles below in most cases, covering comprehensively is closed not only Crackle can be closed effectively, and concrete can be prevented further to be carbonized.But rigid coating mixes after cannot resisting covering The crack of solidifying soil kainogenesis.To undertaking the Rail Highway bridge of Heavy-haul Freight, if with elastic coatings such as polyureas to Bridge Crack Covering comprehensively, and it is possible to cover the large fracture hidden danger of concrete kainogenesis under coating without being found.Lose timely fracture The chance of perfusion bonding, repairing reinforcement, may cause peril.Technical restriction limits all standing elastic coating Close administering method.

Fluorine carbon flexible coating has been tried out in Qinghai-Tibet Railway, and repairing coating is carried out to beam body crackle.Scheme is on sealing bottom coating Individually use 60 microns of thick coatings of fluorine carbon flexible paint of elongation at break >=150%.Experiment proves this coating at normal temperatures all It can crack with concrete cracking.In Qinghai-Tibet low temperature environment with less cracking resistance.And it is flexible to obtain, utilize bullet Property curing agent increases strand, under the intensive ultraviolet radiation of plateau, reduces the flexible fluorine carbon of preventing ultraviolet ageing properties Coating life is reduced.

The performance of building roof waterproof coating is also not satisfactory at present, and roof seepy question often occurs.Its reason One of be elastic polyurethane coating, modified pitch type coating weatherability is not good enough, coating aging quickly.Second is that modified pitch type coating Crack resistance is bad, and when distress in concrete is larger, coating also cracks therewith.As troubling problem.

The problem of pond antiseep coating is there is also similar to weatherability, crack resistance.

In ocean engineering, islands and reefs construction, Wharf Construction, other than using precast concrete, cast-in-place concrete is often It is still indispensable.In the cast-in-place concrete of the areas Lang Jian, it is faced with the moment in form removal, i.e., the wave leaching that can be splashed It is wet.The media such as chlorion, sulfate radical in seawater can cause concrete dealkalize, corrosion, the passivation of bar list emaciated face, reinforcement corrosion. Reinforcement corrosion expands, and aggravates the cracking crack of concrete.Building cofferdam prevents wave of high cost, and many situations do not have condition Build cofferdam.Because the invasion of moment wave can cause etching medium to cover, the concrete surface chlorine ion concentration of splash zone can be with Think to reach its maximum value from the beginning, difficulty is brought to the construction of the areas Lang Jian protective coating.And air salt fog-zone then needs to be permitted Maximum value can be just built up for many years.So the coating protection of the areas Lang Jian cast-in-place concrete, is solved relatively more tired by normal process It is difficult..

In conclusion during concrete protection is repaired with distress in concrete regulation at present, there are various technical problems And difficulty.Concrete works protective coating should high durable, long-life, anti-concrete cracking crack again, but also cannot cover Newborn concrete crack width is more than the range of permissible value under lid coating, causes the hidden trouble of concrete works.This is just needed New approaches, new technology and method are proposed on coating material, the theory of coating structure and coating process.

The utility model is directed to many concrete protection coatings stated in above-mentioned background technology and distress in concrete reparation The technical problem in material is renovated, proposes a set of completely new coating theory and technology.

Utility model content

The utility model proposes one kind showing concrete crack width with Quantitative design cracking resistance, with quantification Function, the concrete functional coating system of ladder elastic construction.This coat system positive application or can reversely apply Dress.

The utility model is related to coat system be the physical model based on a ladder elastic coating structure, from outward appearance to inner essence It is followed successively by first layer function of surface coating, can be anti-ultraviolet and weather-resistance coating, sunlight reflective insulation coating, static conductive painting Layer etc..The second layer is middle low elasticity coating, plays important transitional function of forming a connecting link so that third layer high resiliency coating occurs The first level painting can keep adhesive force to fall off without removing when larger tensile deformation.Third layer is with solvent-free polyureas or polyurethane Urea coating undertakes the Major Function that can resist concrete cracking crack as high resiliency inter coat, anti-concrete itself is opened Crack performance can be from 1 millimeter to more than ten millimeter.Epoxy resin primary coat or polyurethane primary coat as the 4th layer of sealing bottom coating layer, The elasticity of the wherein above three layer coating of sealing bottom coating is successively successively decreased upwards, from large to small.

Below just the utility model is related to the principle of ladder spring function coat system, method, technical characterstic do into One step illustrates.

Quantitative design

The coagulations such as concrete-bridge protective coating, high ferro and Line for Passenger Transportation waterproof coating, port engineering, ocean engineering at present The protective coating of geotechnological journey designs all without reference to the quantitative analysis and Quantitative design for resisting distress in concrete.

The utility model proposes the new concept of the Quantitative design of concrete elastic protective coating, new methods to quantify in advance Design coat system resists the performance indicator of concrete foundation fracture width.

Select and determine first kind, elasticity and the thickness of first, second and third layer of coating.Coating has been applied successively It covers on the concrete slab of sealing bottom coating, ladder elastic composite coat system model is prepared into, as physical model.In certain temperature Under, composite coating model is fixed on dynamic cracking resistance tester and is tested.After concrete slab stress cracking, operation instrument Device slowly makes concrete slab crack gradually broaden, when originating raw cracking point when outermost level is spreadable, and gradually forming blind crack, Stop instrument movement.It is measured with reading microscope and records concrete model fracture width data.High resiliency inter coat at this time It is intact, tensile deformation only occurs.

Wherein the elasticity of high resiliency inter coat and thickness are the major regulatory means of Quantitative design, elongation at break Selection in 350%-600%.The higher material of selection elasticity, the thickness of coating is thicker, and entire coat system cracking resistance is just It is stronger.According to the test data of the utility model underlying coating layer structure physical model, when elastic midcoat thickness is in 0.3mm- When 4mm ranges, inter coat itself can resist the fracture width range of concrete from 1mm-20mm without cracking.Inter coat When high elastic and strength makes face apply cracking, inter coat is still still intact, can continue that concrete structure is protected not to be harmful to Medium invades.The solvent-free slow hardening glue polyureas of material selection or no-solvent polyurethane urea, it is preferential to select slow hardening glue polyureas, gel time - 120 seconds 40 seconds, elongation at break 450%-600%, thickness 0.3mm-3mm, tensile strength 10-20MPa.

The elasticity of low elasticity transition zone and thickness also have an impact entire coat system cracking resistance in the second layer, Ke Yizuo For the control measures of secondary coat system cracking resistance.The main function of this layer of coating is to form a connecting link to complete to apply in high resiliency The smooth transition that coating is applied with low elasticity or nonelastic face, when concrete cracking crack, high resiliency inter coat tensile deformation Face, which applies, still has corresponding adhesive force, will not peel off.The full ether fluorine carbon elastic coating of middle low elasticity tie coat material selection or Polytetrahy-drofuran.Preferentially select full ether fluorine carbon elastic coating, elongation at break 80%-180%.Dry film coating thickness 40-100 microns, tensile strength 16MPa or more.

The first level coating layer Major Function is the entire coat system of protection or realization features.As antiultraviolet When weatherability protective coating, full ether fluorine carbon face is preferentially selected to apply, makes entire coat system that there is best weatherability, light aging resisting Property.Elongation at break 0%-60%, tensile strength are more than 16MPa, 40-100 microns of dry film coating thickness.

Full ether fluorine carbon face applies the cooperation with the full ether fluorine carbon elasticity primary coat of high intensity, ensure that ladder elastic coating system is excellent The combination of weatherability and crack resistance.The integrity of coat system when ensure that reversed application mode dismantling concrete template simultaneously.

It is according to different temperatures, unlike material, different elasticity, the tables of data of different coating thickness classification establishment, database The core foundation of the utility model Quantitative design.The kind of coat system can be selected according to tables of data or database, it is quantitative Design the parameters such as elasticity and the thickness for every layer of the coat system for resisting concrete cracking for meeting concreter's range request.

Different types of face is applied according to this method, the second layer third layer coating of different elastic properties and tensile strength The concrete ladder elastic coating system model manufactured is combined, at a certain temperature, corresponding concrete slab fracture is carried out, stretches And face coat cracking is tested and quantitative analysis, establishes tables of data, the database of variety classes coatings combine coat system.According to Tables of data, the data of database can carry out Quantitative design.Varying environment, the concrete of different field can be met in this way Structure coating is required resisting the different of distress in concrete.

Quantitative design makes the design of the anti-distress in concrete composite coating of concrete surface protective coating or functional coating Work, from the design of shortages number concept that in the past can only be broadly be transformed into can be quantitatively, accurately, can make to measure Design level.This is to high-speed rail bridge, bridge spanning the sea, bridge on highway and common railway, highway bridge, beacon, harbour, water power The important concrete works protection such as dam, treatment tank, building roof and concrete cracks are administered all with very important Meaning.Technical guarantee is provided for concrete a century engineering.

Quantitative design can also reduce unnecessary painting thickness compared with the concrete protection design that thick lines are generally changed Degree saves material cost.

Quantification is shown

Quantification shows after high resiliency coating can be made to cover concrete surface, newly-generated distress in concrete reach and As defined in being above standard when width, real conditions will not be blanked, and existing hidden danger timely can be found and be handled.

Specific method is at a certain temperature, to be mixed to concrete sheath coat model using dynamic cracking resistance tester When concrete board fracture, face apply cracking test, cracking takes place with outermost layer coating when measuring concrete model fracture width After related data, it is continuing with Material Testing Machine and concrete composite coating system model is stretched, the recording surface when stretching The related data of coating layer crack width and concrete slab crack width.Until last intermediate high resiliency coating cracking.It will The related data that the fracture width of whole process concrete model cracks with Surface Coating Cracks width, inter coat, typing number According to table, database.

Elongation at break, tensile strength and binding force etc. of the same method to variety classes, different elastic property coatings Data carry out quantitative analysis, establish tables of data, database.Cracking Resistance of Coating can be related to temperature.Tables of data and database are roots It is formulated according to test data at different temperatures.The cracking resistance Quantitative design and display function of concrete structure protective coating can be with Fiducial temperature is determined according to specific environment and engineering demand.To adapt to the engineering of different regions.

The ladder elastic concrete functional coating of the utility model is being on active service in use, just becoming a kind of having display function Coating.When coating covering concrete surface kainogenesis crack meet or exceed standard, specification setting must repair benefit When strong fracture width, face applies the prompt that can crack.Coat system is isotropic, therefore face applies the trend and concrete of crackle The trend in crack is consistent.The cracking width and trend applied according to surface face, control reference same type coating cracking test data table Or database, it is possible to determine that the overproof developed width of distress in concrete.Maintenance and repair personnel can according to fracture width and Trend is resorted to live correct treatment measures.Face coating colour and the color of high resiliency inter coat have larger contrast, carry Show that the effect with warning can be more eye-catching.

Quantification display function can be such that the important concrete works such as railway, highway bridge, water resources dam courageously make With weatherability spring protective coating, exempting elastic coating, may to cover that concrete under coating is above standard, specification limits crack wide The phenomenon that dangerous hidden danger of degree, in time prompt engineering maintenance personnel's concerned issue, accurate judgement Concrete Engineering Cracks width and Trend, makes correct Disposal Measures.So that Concrete Engineering Cracks obtain timely slip casting repairing reinforcement, accident is avoided.

Reversed coating decoration

Reversed application is useful in the ocean areas Lang Jian cast-in-place concrete.

The method of reversed application is the template surface in cast-in-place concrete, by interface unbound agent --- full ether fluorine carbon face Apply --- full ether fluorine carbon elasticity primary coat --- high elastic and strength inter coat --- order of sealing bottom coating, reversed application.So Afterwards in sealing bottom coating coating surface cast-in-place concrete.After the completion of waiting for concrete curing, form removal, entire protective coating system is Fully it is covered in concrete surface.When wave splashing comes, adhesional wetting is that there is the full ether fluorine carbon face of safeguard function to apply surface. The seawater of the corrosive mediums such as chloride ion-containing, sulfate ion will not corrode concrete.

The specific technical solution of the utility model is：

It is a kind of can quantification show distress in concrete concrete functional coating system, it is characterized in that being made of four layers of coating Ladder elastic coating structure, be from outward appearance to inner essence followed successively by first layer be function of surface coating, the second layer be middle low elasticity transition zone, Third layer be high resiliency polyureas or polyurethane-urea inter coat, the 4th layer be epoxy resin primary coat or polyurethane primary coat as coagulation The bottom-up elasticity of native seal coat, wherein three layer coating more than seal coat, which is successively successively decreased, to become smaller.

As primary variables, concrete cracking can be resisted by, which undertaking, splits for the high resiliency polyureas or polyurethane-urea inter coat The Major Function of seam, second layer coating play important transitional function of forming a connecting link so that third layer is high-elastic as secondary variable Property coating occur larger tensile deformation when the first level painting can keep adhesive force without remove fall off, by using different bullets Property, different-thickness coating can regulate and control the cracking resistance of entire coat system.

Further, according to the cracking width and trend of first layer function of surface coating, control reference same type coating is opened Split test data table or database, it is possible to determine that the trend of distress in concrete and overproof developed width.

Further, first layer is function of surface coating, elongation at break in 0%-60%, tensile strength 16MPa with On, 40-100 microns of thickness of dry film.

Further, middle low elasticity transition zone coats the coating formed for full ether fluorine carbon elastic coating, and coating failure is stretched Long rate is 80% -180%, and tensile strength is in 16MPa or more, 40-100 microns of thickness of dry film.

Further, polyureas or polyurethane urea coating are as third layer high resiliency inter coat, elongation at break 450%- 600%, tensile strength 10MPa-20MPa, 500-3000 microns of thickness.

Further, function of surface coating can be ultraviolet-proof or sunlight reflective insulation coating or static conductive Coating.

The utility model realizes reversed application, and there are three key techniques.

First, the utility model ladder elastic coating has higher intensity and elasticity.Full ether fluorine carbon face coating layer, full ether The tensile strength of fluorine carbon elastic coating and intermediate high resiliency polyurea coating is in 16MPa or more.Preferentially applied using full ether fluorine carbon face Coating failure elongation 40%, full ether fluorine carbon elastic coating elongation at break 100%, high resiliency polyureas elongation at break 500%.

Second, the utility model uses dedicated epoxy resin primary coat at the interface of epoxy primary coat and cast-in-place concrete and applies Material and special construction technology.The formula of special epoxy primer is weight percentage E51 epoxy resin 35%-38%, epoxy Propane butyl ether 4%-5%, 650 Versamid 52%-55%, propylene glycol monomethyl ether 2%-5%.Special epoxy coating ingredient In contain hydroxyl, ether, amide groups all have certain hydrophily.The method that coating process takes casting concrete in advance. I.e. special epoxy primary coat is hardened after application implementation in coating substantially, before being not yet fully cured, early excise cast-in-place concrete. The binding force at the interface of epoxy coating and cast-in-place concrete is set to be further improved.Preferential selection is fully cured 1-3 hours first Cast-in-place concrete.Such two key measures so that the numerical value of last concrete sheath coat adhesive force hubbing detection reaches 3.5MPa-5.0MPa.The standard requirement of remote super 2.5MPa.

Third, contact angle >=120 ° that full ether fluorine carbon face applies.Full ether fluorine carbon face is applied uses interface unbound with the interface of template Agent is a kind of low-surface-energy siloxanes remover, or uses other releasing agents.Preferentially using dimethyl silicone polymer, poly- diethyl The emulsion-type or solvent release agent of radical siloxane.Template surface is uniformly coated on when use, then extra with clean cotton erasing Releasing agent.

Reversed application is very great to the coating protection construction meaning of ocean splash zones cast-in-place concrete, it is solved The seawater splash pickup that is difficult to avoid that when positive application after usual cast-in-place concrete, the erosion problem to armored concrete.For sea The implementation of foreign engineering, islands and reefs construction, the concrete protection coating of sea port dock engineering provides effective new method New Measure.

Description of the drawings

Figure of description is the sectional view of the shape, structure of the utility model ladder elastic construction coat system.Wherein Ah Arabic numbers mark coating and material be respectively：1, function of surface coating；2, middle low elasticity coating；3, it is applied among high resiliency Layer；4, sealing bottom coating coating；5, concrete.

Specific implementation mode

Embodiment 1.

Coating is non-maintaining in 15 years, and coating resists distress in concrete performance and is not less than 3.0mm at normal temperatures.

According to existing data table data library, design face, which applies, uses complete 60 microns of thickness of ether fluororine-carbon coating, elongation at break 30%.The second layer is full ether fluorine carbon elastic coating, 60 microns of thickness, elongation at break 120%.Middle spring coating is poly- for slow hardening glue Urea coating, gel time 40 seconds, elongation at break 550%, tensile strength 16MPa, coating layer thickness 1.9mm.

Verification test at 25 DEG C is when as a result, concrete sheath coat test piece splits, width average value reaches 3.0mm, full ether fluorine The painting of carbon elastic surface starts to crack.And the cracking resistance of intermediate polyurea coating reaches 12mm or more.This anti-distress in concrete performance Strong coating can be used for the working environment of the high cracking resistance of requirement.Such as earthquake, the frequent generating region concrete construction of tsunami, concrete roof The antiseep coating of waterproof coating and concrete basin inner surface.

Embodiment 2.

On the basis of 5 DEG C, when concrete generation crackle reaches 0.4mm width, face applies display cracking.

According to database data, design flexibility inter coat is the slow hardening glue spray polyurea coating of elongation at break 500%, Thickness 1.5mm.Full ether fluorine carbon elastic coating is elongation at break 100%, 50 microns of thickness of dry film.Full ether fluorine carbon face coating layer is dry 50 microns of film thickness, elongation at break 20%.

In fracture, the tension test of concrete sheath coat plate are verified, face is coated in when concrete crack width reaches 0.4mm and opens Begin cracking.Concrete slab continues to stretch, and fracture width is made to continue to widen, and the crack that the face of micrometering apparatus measures applies is wide Degree will accordingly show corresponding concrete crack width numerical value.

Embodiment 3.

The reversed application in the areas Lang Jian.

The steel form inner surface of the concrete steel formwork inner surface and capping that combine is cleaned out respectively, is used Clear water or solvent scouring are clean.After to be dried, the very thin layered low-surface energy polysiloxanes release agent of even application.With clean cotton yarn Wipe out extra release agent.Then again with carefully twice of wiping of clean cotton yarn.Release agent can influence full ether fluorine carbon face and apply too much Attachment.

XF-01 full ether fluorocarbon coatings diluent adjusts viscosity to applying -4 glasss 15-22 seconds, is sprayed to punching block plate surface It applies.40 microns of thickness of dry film.After face coat solidification, in kind continue to spray the full ether fluorine carbon elastic coatings of XF-100 one Road, 60 microns of thickness of dry film.After full ether fluorine carbon elastic coating solidification, sprayed at 65 DEG C with high pressure airless spraying machine solvent-free Slow hardening glue XP-01 spray polyurea coatings, gel time 40 seconds, 1500 microns of thickness, elongation at break 545%.After 2 hours, apply Cover special epoxy resin primary coat together, 30 microns of thickness.Special epoxy resin primary coat is coated with after solidification together, thickness 20 is micro- Rice, in the state that the primary coat of second special epoxy resin is fully cured for also poor 2 hours, the concrete mortar stirred evenly is poured It casts onto and has applied in the punching block sheet frame case installed, after concrete surface and four frame edges are made even, by capping steel form coat side It is covered on concrete downward, pressurization fastening makes capping be fitted closely with four frame templates.The concrete curing phase then, can be with Template easily is removed, coat system is integrally covered in cast-in-place concrete surface.

Surface, which is applied, in fluorine carbon face does drawing binding force measured value with adhering with epoxy resin aluminium ingot：3.9MPa, the plane of disruption are Concrete layer.DeFlsko companies of measuring instrument U.S. PosiTest AT (PosiTest Pull-off Adhesion Tester)。

Claims (7)

1. a kind of quantification can reversed application concrete functional coating, it is characterized in that being applied by four layers of coat composed ladder elasticity Layer structure, is from outward appearance to inner essence followed successively by that first layer is function of surface coating, the second layer is middle low elasticity transition zone, third layer is high-elastic Property polyureas or polyurethane-urea inter coat, the 4th layer be epoxy resin primary coat or polyurethane primary coat as concrete enclosing coating, The bottom-up elasticity of three layer coating wherein more than seal coat, which is successively successively decreased, to become smaller.

2. a kind of quantification described in claim 1 can reversed application concrete functional coating, it is characterized in that high resiliency polyureas Or polyurethane-urea inter coat undertakes the Major Function that can resist concrete cracking crack as primary variables, the second layer applies Layer is used as secondary variable, plays important transitional function of forming a connecting link so that larger stretching shape occurs for third layer high resiliency coating The first level painting can keep adhesive force to fall off without removing when change, can be adjusted by using different elasticity, different-thickness coating Control the cracking resistance of entire coat system.

3. a kind of quantification described in claim 1 can reversed application concrete functional coating, it is characterised in that applying series of strata During system is on active service, according to the cracking width and trend of first layer function of surface coating, control reference same type coating cracking tests number According to table or database, it is possible to determine that the trend of distress in concrete and overproof developed width.

4. a kind of quantification described in claim 1 can reversed application concrete functional coating, it is characterized in that first layer is table Face functional coating, elongation at break is in 0%-60%, and tensile strength is in 16MPa or more, 40-100 microns of thickness of dry film.

5. a kind of quantification described in claim 1 can reversed application concrete functional coating, it is characterized in that middle low elasticity mistake It crosses layer and coats the coating formed for full ether fluorine carbon elastic coating, coating failure elongation exists in 80%-180%, tensile strength 16MPa or more, 40-100 microns of thickness of dry film.

6. a kind of quantification described in claim 1 can reversed application concrete functional coating, it is characterized in that polyureas or poly- ammonia For ester urea coating as third layer high resiliency inter coat, elongation at break 450%-600%, tensile strength 10MPa-20MPa are thick 500-3000 microns of degree.

7. a kind of quantification described in claim 1 can reversed application concrete functional coating, it is characterized in that function of surface applies Layer can be ultraviolet-proof or sunlight reflective insulation coating or static conductive coating.