CN101876162B - Durability traceless repair method for road and bridge concrete - Google Patents

Durability traceless repair method for road and bridge concrete Download PDF

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Publication number
CN101876162B
CN101876162B CN 200910050438 CN200910050438A CN101876162B CN 101876162 B CN101876162 B CN 101876162B CN 200910050438 CN200910050438 CN 200910050438 CN 200910050438 A CN200910050438 A CN 200910050438A CN 101876162 B CN101876162 B CN 101876162B
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concrete
trimming
mortar
putty
color difference
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CN 200910050438
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CN101876162A (en
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陈嘉林
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SHANGHAI HUIBANG SPECIAL PAINT CO Ltd
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SHANGHAI HUIBANG SPECIAL PAINT CO Ltd
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Abstract

The invention relates to a durability traceless repair method for road and bridge concrete. The method comprises the following steps of: (1) repairing a base surface of the concrete with a surface defect by using a repairing material so as to trim and flatten the base surface, wherein the repairing material comprises polymer fine sand mortar and color difference trimming putty; (2) performing prime coat on the repairing material; (3) preparing a trimming material, wherein the structure and color of the trimming material are similar to those of the concrete, and the trimming material has a high adhesive property; (4) performing floating coat by adopting an organic silicon resin coating; and (5) performing top coat by adopting a coating prepared from a silicon resin accessory ingredient. The formulas of the color difference trimming putty and the trimming material are introduced. The method has the advantages of effectively repairing the surface defect of the concrete structure tracklessly, restoring the strength of the concrete structure and improving waterproof property and durability of the concrete structure.

Description

A kind of road and bridge concrete durability traceless repair method
Technical field
The present invention relates to a kind of concrete amending method; be specifically related to a kind of road and bridge concrete durability repairing and seamless modification technique, adopt extremely strong new material, the new technologies of specific aim such as high strength polymer fine sand mortar, color difference trimming putty, concrete protective coating to guarantee to repair the position endurance quality and be not less than this body concrete and appearance preservation concrete true qualities.
Background technology
The concrete structures such as the railway of China, highway, bridge, culvert are because the construction period is short, and super large is measured by the side, and the construction fund restriction is not generally done to decorate and paint, exposes in natural environment.
Concrete will be subject to the corrosion of acid rain, low temperature freeze thawing, snow melting agent (deicer salts), salinized soil, seawater salt fog, mould, algae bio inevitably as a kind of constructional materials of porous, makes concrete forfeiture durability, accelerated deterioration.Especially the defective such as the casting and compacting of concrete technique body structure surface crack that is difficult to avoid, hole, honeycomb, pitted skin has not only affected attractive in appearancely, has also destroyed to a certain extent reinforcement cover, and there is a crack to squeeze through to make the intrusion of various corrosive mediums.
In the concrete repair process, repair the surface-defect repairing that standard carries out according to present concrete work and often form obvious aberration, perhaps lower in mend new-to-old concrete interface adhesion strength, very fast again can cracking and come off.The repairing of concrete defect and reinforcement do not form again larger aberration simultaneously, are puzzlement construction of road and bridge person's a great problem all the time.Because the engineering side of construction of road and bridge amount is large and the restriction of construction fund, do not possess the condition of whole application, usually stay and repair the sorry of vestige, aberration.
Summary of the invention
The present invention is exactly in order to address the above problem, overcome mend new-to-old concrete interface adhesion strength lower, the very fast problem of again can cracking and coming off, and the final result surface-defect repairing often forms the difficult problem of obvious aberration, provides a kind of road and bridge concrete durability traceless repair method.
The present invention adopts the patch system of multiple working procedure, the polymer fine sand mortar that is higher than the original structure concrete strength comprising employing, mend with the color difference trimming putty embedding that the basal plane primary colors is basically identical, then adopt the special-purpose trimming material of concrete and specialist tools that the position that aberration appears in the concrete surface is repaired again, adopt at last translucent or little painted coatings with high weatherability to cover application.
This invention is applicable to concrete repairing of road and bridge, by finishing and the enhanced protection to concrete structure outward appearance defect, sets about from the weakness of structure, has eliminated the hidden danger of concrete deterioration, has guaranteed effective performance of concrete function within design period.
Because excellent material performance of the present invention, cooperatively interacting property is good between the material, therefore, can effectively realize concrete high-durability traceless repair, because applicable sectional repair partial painting, so this technology implementation cost is lower.
This is repaired modification technique and can select together or multiple working procedure according to on-site actual situations, both can the road and bridge concrete structure under the heavy corrosion environment not changed under the outward appearance true qualities condition according to designing requirement and has done the Global Macros application; Also can make traceless repair and local protective and decorative by the defective road and bridge concrete of effects on surface, because repairing position and large area concrete outward appearance are very nearly the same, 80%~90% cost is saved in more whole application.
The technical problem that will solve required for the present invention can be achieved through the following technical solutions:
A kind of road and bridge concrete durability traceless repair method, may further comprise the steps, referring to Fig. 1:
(1) concrete surface in surface blemishes adopts the repairing material to repair, and the mending concrete surface blemishes is repaired basal plane floating;
Described repairing material comprises polymer fine sand mortar and color difference trimming putty; Ratio by color difference trimming putty is regulated, be prepared into the color difference trimming putty very close with the concrete structure color, use color difference trimming putty that polymer fine sand mortar surface is split flat, described color difference trimming putty polymer fine sand mortar and primary coat all have good adhesive property;
(2) carry out primary coat at the repairing material, the zone that primary coat reaches the concrete infiltration reduces surface tension, stops passing through of moisture, prevents that hazardous substances is to concrete corrosion;
(3) after the primary coat, be prepared into the trimming material close with the concrete structure color, brushing trimming material in primary coat;
(4) adopt silicone resin coating, be coated with in carrying out, realize the difference in appearance that concrete durability refractive properties different from from basal plane trimming material bring;
(5) adopt organic siliconresin, organic fluorine or fluorine silicon are pieced together the coating that is prepared into resin and are coated with as face, realize that simultaneously effects on surface luminosity processes and coated inside is protected.
The described polymer fine sand of step (1) mortar adopts the favour D-102C of nation Polymer-Modified Mortar, 28 days rupture strength 〉=15MPa, 28 days compressive strength 〉=50MPa, 28 days adhesion strength 〉=2.0MPa, the shrinkage factor of mortar≤0.15%.
The described color difference trimming putty of step (1) is adjusted the color of material by the consumption of white portland cement and Portland cement, the intensity of regulating mortar by the ratio of breeze and quartz sand, and other auxiliary agents can improve outward appearance and the workability of mortar.
Described auxiliary agent comprises can be at dispersed latex powder, middle effect water reducing agent and defoamer.
Step (2) adopts solvent-borne type or aqueous silane complex emulsions as primary coat, can obviously reduce surface tension in the zone that the concrete infiltration reaches, and stops passing through of moisture, prevents that villaumite, sulfate, carbonate hazardous substances are to concrete corrosion.
Step (3) trimming material has the color effect of certain adjustment material, can produce the shade effect to the concrete surface crackle by the adjusting to the consumption of calcium carbonate and titanium dioxide, texture and the texture that can keep the concrete surface nature also have the outward appearance of improving mortar and the effect of workability.
Be coated with the composite coating that adopts organic siliconresin, organic fluorine etc. to be prepared in the step (4), in be coated with and have obvious water-proof function and can improve concrete durability, can adjust the difference in appearance that trimming material refractive properties different from basal plane bring simultaneously.
A kind of color difference trimming putty, color difference trimming putty are one pack system, mainly fill a prescription following (mass fraction, total amount are 100):
Portland cement 0~30
Breeze 0~10
Quartz sand (100 order) 30~40
Quartz sand (200 order) 25~45
Can be in dispersed latex powder 1~2
Middle effect water reducing agent 0.1~0.2
Defoamer 0.2~0.3.
Described portland cement comprises white portland cement and Portland cement, and the ratio of white portland cement and Portland cement is 1~30:1~30.
Color difference trimming putty is one pack system, optimization formula following (mass fraction, total amount are 100):
White portland cement 5~20
Portland cement 5~20
Breeze 5
Quartz sand (100 order) 35
Quartz sand (200 order) 40
Can be in dispersed latex powder 1.5
Middle effect water reducing agent 0.15
Defoamer 0.25.
A kind of trimming material, trimming material prescription (parts by weight, total amount are 1000)
Band epoxy radicals acrylic acid ester emulsion 200~400
Organic silicon emulsion 100~200
Silica sand 50~150
Micro-crystal powder 100~200
Titanium dioxide 0~150
Calcium carbonate 0~150
PH value stabilization agent 1~2
Hydroxyethylcellulose 1~2
Levelling agent 5~10
Defoamer 2~5
Water 100~200.
The optimization formula of trimming material (parts by weight, total amount are 1000)
Band epoxy radicals acrylic acid ester emulsion 300
Organic silicon emulsion 150
Silica sand 100
Micro-crystal powder 150
Titanium dioxide 25
Calcium carbonate 25
PH value stabilization agent 1.5
Hydroxyethylcellulose 1.5
Levelling agent 7.5
Defoamer 3.5
Water 146.
Job practices:
Repair material: the defective that at first checks basal plane, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating, maintenance to D-102C Polymer-Modified Mortar surface drying can carry out follow-up construction, according to ambient conditions, about 4 hours, construction should be adopted brushing or split the mode of scraping;
Aberration is adjusted material: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, and according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Primary coat: coating is permeable material, and after the construction, follow-up construction can be carried out without wet mark in the surface, and construction is adopted spraying or adopted the brushings such as brush, cylinder;
In be coated with: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Face is coated with: coating thickness 85~90 μ m, and about consumption 0.20kg/ ㎡, natural curing is to doing solid work, and construction is adopted spraying or is adopted the brushings such as brush, cylinder.
Fig. 2 is that different colour systems are repaired material in the concrete structural surface effect, the lower left corner is the concrete of light-colored surface defective, the upper left corner is the concrete of inclined to one side light-colored surface defective, and the upper right corner is the concrete of inclined to one side light-colored surface defective, and the lower right corner is the concrete of dark surface blemishes.
Beneficial effect of the present invention:
The present invention is a kind of skin patching and decoration technique of basic maintenance concrete appearance, mainly be applicable to the repairing of the surface damage parts such as honeycomb, pitted skin, breakage, corner angle breakage of the large-sized concrete structure such as road and bridge, can recover the intensity of concrete structure, and improve durability of concrete structures.
The present invention can effectively without the defective of vestige mending concrete body structure surface, solve the concrete surface defective and have a strong impact on concrete structure is ornamental.
Because solvent-borne type or aqueous silane complex emulsions are adopted in primary coat of the present invention, have preferably water resistance, therefore can behind skin patching, improve waterproof and the endurance quality of concrete structure.
Preparation method's material source of the present invention is simple, easy to operate, the saving cost.
Description of drawings
Further specify the present invention below in conjunction with the drawings and specific embodiments.
The schematic diagram of Fig. 1 coating process of the present invention.
The different colour systems of Fig. 2 are repaired material at the design sketch of concrete structural surface.
Fig. 3 repairs the concrete design sketch of rear light-colored surface defective.
Fig. 4 repairs the concrete design sketch that retrodeviates the light-colored surface defective.
Fig. 5 repairs the concrete design sketch that retrodeviates dark surface blemishes.
The specific embodiment
In order to make technological means of the present invention, creation characteristic, to reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Embodiment 1
The concrete of light-colored surface defective, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating;
By the color difference trimming putty very close with the concrete structure color, carry out the color finishing.
This color difference trimming putty is that one pack system is mainly filled a prescription following (mass fraction, total amount are 100):
White portland cement 25
Portland cement 3
Breeze 5
Quartz sand (100 order) 35
Quartz sand (200 order) 30
Can be in dispersed latex powder 1.6
Middle effect water reducing agent 0.2
Defoamer 0.2.
Adopt aqueous silane complex emulsions Wacker company BS43N can obviously reduce surface tension as primary coat in the zone that the concrete infiltration reaches, stop passing through of moisture, prevents that the hazardous substancess such as villaumite, sulfate, carbonate are to concrete corrosion.
Trimming material, trimming material prescription (parts by weight, total amount are 1000)
Band epoxy radicals acrylic acid ester emulsion 300
Organic silicon emulsion 100
Silica sand 125
Micro-crystal powder 200
Titanium dioxide 25
Calcium carbonate 125
PH value stabilization agent 1.5
Hydroxyethylcellulose 1
Levelling agent 7
Defoamer 3
Water 112.5.
The trimming material prescription adopts material as follows:
Acrylate TB-15(sunrise chemical industry with epoxide group)
Organic silicon emulsion BS43N(Wacker)
Micro-crystal powder SP-VS(Shanghai Daewoo is biochemical)
Titanium dioxide R-258(Dow)
Calcium carbonate CC2000(Shanghai Daewoo is biochemical)
Hydroxyethylcellulose HEC250HBR(Aqualon)
Levelling agent RM2020NPR(Roam﹠amp; Hass)
Defoamer NXZ(Nopco)
Adopt silicone resin coating, such as clear day POLYSOL AP-4765, realize the floating coat of system, realize the difference in appearance that concrete durability and adjustment color difference trimming layer refractive property different from basal plane bring;
Adopt the silicones compounding aid, the coating that is prepared into such as clear day POLYSOL AP-4765 is coated with as face.
Job practices:
Repair material: the defective that at first checks basal plane, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating, maintenance to D-102C Polymer-Modified Mortar surface drying can carry out follow-up construction, according to ambient conditions, about 4 hours, construction should be adopted brushing or split the mode of scraping;
Aberration is adjusted material: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, and according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Primary coat: coating is permeable material, and after the construction, follow-up construction can be carried out without wet mark in the surface, and construction is adopted spraying or adopted the brushings such as brush, cylinder;
In be coated with: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Face is coated with: coating thickness 85~90 μ m, and about consumption 0.20kg/ ㎡, natural curing is to doing solid work, and construction is adopted spraying or is adopted the brushings such as brush, cylinder.
As shown in Figure 3, repair the concrete of rear light-colored surface defective.
Embodiment 2
The concrete of dark surface blemishes, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating;
By the color difference trimming putty very close with the concrete structure color, carry out the color finishing.
This color difference trimming putty is that one pack system is mainly filled a prescription following (mass fraction, total amount are 100):
White portland cement 0
Portland cement 26
Breeze 7
Quartz sand (100 order) 33
Quartz sand (200 order) 30
Can be in dispersed latex powder 1.5
Middle effect water reducing agent 0.2
Defoamer 0.3.
The trimming material prescription adopts material with embodiment 1.
Adopt solvent-borne type silane complex emulsions Wacker company BS290 can obviously reduce surface tension as primary coat in the zone that the concrete infiltration reaches, stop passing through of moisture, prevents that the hazardous substancess such as villaumite, sulfate, carbonate are to concrete corrosion.
Trimming material, trimming material prescription (parts by weight, total amount are 1000)
Band epoxy radicals acrylic acid ester emulsion 280
Organic silicon emulsion 120
Silica sand 100
Micro-crystal powder 200
Titanium dioxide 150
Calcium carbonate 125
PH value stabilization agent 1.5
Hydroxyethylcellulose 1
Levelling agent 5
Defoamer 3
Water 114.5.
Adopt clear day POLYSOL AP-4765 of silicone resin coating, realize the floating coat of system, realize the difference in appearance that concrete durability and adjustment color difference trimming layer refractive property different from basal plane bring;
Adopting fluororesin to be equipped with the coating that the ZEFFLE SE-350 of auxiliary agent Daikin company is prepared into is coated with as face.
Job practices:
Repair material: the defective that at first checks basal plane, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating, maintenance to D-102C Polymer-Modified Mortar surface drying can carry out follow-up construction, according to ambient conditions, about 4 hours, construction should be adopted brushing or split the mode of scraping;
Aberration is adjusted material: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, and according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Primary coat: coating is permeable material, and after the construction, follow-up construction can be carried out without wet mark in the surface, and construction is adopted spraying or adopted the brushings such as brush, cylinder;
In be coated with: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Face is coated with: coating thickness 85~90 μ m, and about consumption 0.20kg/ ㎡, natural curing is to doing solid work, and construction is adopted spraying or is adopted the brushings such as brush, cylinder.
Embodiment 3
The concrete of inclined to one side light-colored surface defective, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating;
By the color difference trimming putty very close with the concrete structure color, carry out the color finishing.
This color difference trimming putty is that one pack system is mainly filled a prescription following (mass fraction, total amount are 100):
White portland cement 12
Portland cement 16
Breeze 5
Quartz sand (100 order) 35
Quartz sand (200 order) 30
Can be in dispersed latex powder 1.6
Middle effect water reducing agent 0.1
Defoamer 0.3.
The trimming material prescription adopts material with embodiment 1.
Adopt aqueous silane complex emulsions Wacker company BS43N can obviously reduce surface tension as primary coat in the zone that the concrete infiltration reaches, stop passing through of moisture, prevents that the hazardous substancess such as villaumite, sulfate, carbonate are to concrete corrosion.
Trimming material, trimming material prescription (parts by weight, total amount are 1000)
Band epoxy radicals acrylic acid ester emulsion 280
Organic silicon emulsion 120
Silica sand 150
Micro-crystal powder 200
Titanium dioxide 100
Calcium carbonate 125
PH value stabilization agent 1.5
Hydroxyethylcellulose 1
Levelling agent 5
Defoamer 3
Water 114.5.
The trimming material prescription adopts material with embodiment 1.
Adopt silicone resin coating, such as clear day POLYSOL AP-4765, realize the floating coat of system, realize the difference in appearance that concrete durability and adjustment color difference trimming layer refractive property different from basal plane bring;
Adopt fluorine silicon resin, be coated with as face according to the coating that the assembly of weight ratio 3:1 ratio is prepared into compounding aid such as clear day POLYSOL AP-4765 and the ZEFFLESE-350 of Daikin company.
Job practices:
Repair material: the defective that at first checks basal plane, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating, maintenance to D-102C Polymer-Modified Mortar surface drying can carry out follow-up construction, according to ambient conditions, about 4 hours, construction should be adopted brushing or split the mode of scraping;
Aberration is adjusted material: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, and according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Primary coat: coating is permeable material, and after the construction, follow-up construction can be carried out without wet mark in the surface, and construction is adopted spraying or adopted the brushings such as brush, cylinder;
In be coated with: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Face is coated with: coating thickness 85~90 μ m, and about consumption 0.20kg/ ㎡, natural curing is to doing solid work, and construction is adopted spraying or is adopted the brushings such as brush, cylinder.
As shown in Figure 4, repair the concrete that retrodeviates the light-colored surface defective.
Embodiment 4
The concrete of partially dark surface blemishes, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating;
By the color difference trimming putty very close with the concrete structure color, carry out the color finishing.
This color difference trimming putty is that one pack system is mainly filled a prescription following (mass fraction, total amount are 100):
White portland cement 10
Portland cement 20
Breeze 3
Quartz sand (100 order) 35
Quartz sand (200 order) 30
Can be in dispersed latex powder 1.6
Middle effect water reducing agent 0.2
Defoamer 0.2.
The trimming material prescription adopts material with embodiment 1.
Adopt the aqueous silane complex emulsions Daikin ZEFFLE SE-350 of company as primary coat, can in the zone that the concrete infiltration reaches, obviously reduce surface tension, stop passing through of moisture, prevent that the hazardous substancess such as villaumite, sulfate, carbonate are to concrete corrosion.
Trimming material, trimming material prescription (parts by weight, total amount are 1000)
Band epoxy radicals acrylic acid ester emulsion 300
Organic silicon emulsion 150
Silica sand 150
Micro-crystal powder 200
Titanium dioxide 25
Calcium carbonate 50
PH value stabilization agent 1.5
Hydroxyethylcellulose 1
Levelling agent 5
Defoamer 3
Water 114.5.
Adopt clear day POLYSOL AP-4765 of silicone resin coating, realize the floating coat of system, realize the difference in appearance that concrete durability and adjustment color difference trimming layer refractive property different from basal plane bring;
Adopting fluorine silicon to piece together with POLYSOL AP-4765 of clear day of resin and the ZEFFLESE-350 of Daikin company is coated with as face according to the coating that the assembly of weight ratio 3:1 ratio is prepared into compounding aid.
Job practices:
Repair material: the defective that at first checks basal plane, polymer fine sand mortar adopts can come the larger defective in mending concrete surface by the D-102C of the favour nation Polymer-Modified Mortar of high breaking strength, compressive strength and adhesion strength, basal plane is repaired floating, maintenance to D-102C Polymer-Modified Mortar surface drying can carry out follow-up construction, according to ambient conditions, about 4 hours, construction should be adopted brushing or split the mode of scraping;
Aberration is adjusted material: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, and according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Primary coat: coating is permeable material, and after the construction, follow-up construction can be carried out without wet mark in the surface, and construction is adopted spraying or adopted the brushings such as brush, cylinder;
In be coated with: coating thickness 40~50 μ m, about consumption 0.13kg/ ㎡, can carry out follow-up construction to surface drying, according to ambient conditions, construction in about 1 hour is adopted spraying or is adopted the brushings such as brush, cylinder;
Face is coated with: coating thickness 85~90 μ m, and about consumption 0.20kg/ ㎡, natural curing is to doing solid work, and construction is adopted spraying or is adopted the brushings such as brush, cylinder.
As shown in Figure 5, repair the concrete that retrodeviates dark surface blemishes.
Method of the present invention can determine the actual repairing method that uses according to concrete situation, can take wherein certain several step to carry out concrete repair or reach decorative effect.
Compared with the prior art, the present invention selects the fine sand polymer mortar, has higher intensity with respect to concrete, and is basically identical with concrete primary colors.
Color difference trimming putty of the present invention effectively without the defective of vestige mending concrete body structure surface, solves the concrete surface defective and has a strong impact on concrete structure is ornamental.
The present invention's protection has durability; select in the organic siliconresin conduct and be coated with; select organic fluorine to be coated with as face; organic siliconresin or organic fluorine have sealed concrete pore basically; hide concrete blind crack, and prevent that reinforcing bar from receiving corrosion, simultaneously organic siliconresin or the organic fluorine life-span in 15~20 years that guarantees to film; have preferably durability, can make building surface avoid for a long time Renovation.
The present invention adopts solvent-borne type or aqueous silane complex emulsions as primary coat, and primary coat has a kind of concrete water absorption rate that significantly lowers, and effectively stops external water to divide and enters inside concrete.
Owing to containing a large amount of alkaline matters in the composition in the concrete, easily and the acidic materials such as the oxysulfide in the atmosphere, oxycarbide carry out chemistry and electrochemical reaction, cause the concrete neutralisation; The passivating film of the reinforcing bar that concrete is built-in is good at the alkaline environment stability inferior, and along with the concrete neutralisation, passivating film can be damaged and cause reinforcing bar to be subject to corrosion destroying.The clear-water concrete system can intercept the entering of form of oxysulfide, oxycarbide and gas or acid rain to greatest extent, effectively protects concrete.
Primary coat of the present invention, in be coated with and face to be coated with all be transparent or semitransparent coating, can keep texture and the texture of concrete surface nature, can embody the architectural effect of the natural true qualities of concrete.
Above demonstration and described basic principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the manual just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (6)

  1. One kind road and bridge concrete durability traceless repair method, may further comprise the steps:
    (1) concrete surface in surface blemishes adopts the repairing material to repair, and the mending concrete surface blemishes is repaired basal plane floating;
    Described repairing material comprises polymer fine sand mortar and color difference trimming putty; Ratio by color difference trimming putty is regulated, be prepared into the color difference trimming putty with the concrete structure solid colour, use color difference trimming putty that polymer fine sand mortar surface is split flat, described color difference trimming putty polymer fine sand mortar and primary coat all have good adhesive property;
    (2) carry out primary coat at the repairing material, the zone that primary coat reaches the concrete infiltration reduces surface tension, stops passing through of moisture, prevents that hazardous substances is to concrete corrosion;
    (3) after the primary coat, be prepared into the trimming material close with the concrete structure color, brushing trimming material in primary coat; Trimming material prescription (parts by weight, total amount are 1000)
    Band epoxy radicals acrylic acid ester emulsion 200~400
    Organic silicon emulsion 100~200
    Silica sand 50~150
    Micro-crystal powder 100~200
    Titanium dioxide 0~150
    Calcium carbonate 0~150
    PH value stabilization agent 1~2
    Hydroxyethylcellulose 1~2
    Levelling agent 5~10
    Defoamer 2~5
    Water 100~200.
    (4) adopt silicone resin coating, in described trimming material is carried out, be coated with, realize the difference in appearance that concrete durability refractive properties different from from basal plane trimming material bring;
    (5) midway after, adopt organic siliconresin, organic fluorine or fluorine silicon are pieced together the coating that is prepared into resin and are coated with as face, realize that simultaneously effects on surface luminosity processes and coated inside is protected.
  2. A kind of road and bridge according to claim 1 concrete durability traceless repair method, it is characterized in that: the described polymer fine sand of step (1) mortar adopts the favour D-102C of nation Polymer-Modified Mortar, 28 days rupture strength 〉=15MPa, 28 days compressive strength 〉=50MPa, 28 days adhesion strength 〉=2.0MPa, the shrinkage factor of mortar≤0.15%.
  3. A kind of road and bridge according to claim 1 concrete durability traceless repair method, it is characterized in that: the described color difference trimming putty of step (1) is adjusted the color of material by the consumption of white portland cement and Portland cement, regulate the intensity of mortar by the ratio of breeze and quartz sand, other auxiliary agents can improve outward appearance and the workability of mortar, and described auxiliary agent comprises can be at dispersed latex powder, middle effect water reducing agent and defoamer.
  4. A kind of road and bridge according to claim 1 concrete durability traceless repair method, it is characterized in that: step (2) adopts solvent-borne type or aqueous silane complex emulsions as primary coat.
  5. A kind of road and bridge according to claim 1 concrete durability traceless repair method, it is characterized in that: be coated with the composite coating that adopts organic siliconresin, organic fluorine to be prepared in the step (4).
  6. A kind of road and bridge according to claim 1 concrete durability traceless repair method, it is characterized in that: trimming material prescription wherein (parts by weight, total amount are 1000)
    Band epoxy radicals acrylic acid ester emulsion 300
    Organic silicon emulsion 150
    Silica sand 100
    Micro-crystal powder 140
    Titanium dioxide 125
    Calcium carbonate 25
    PH value stabilization agent 1.5
    Hydroxyethylcellulose 1.5
    Levelling agent 7.5
    Defoamer 3.5
    Water 146.
CN 200910050438 2009-04-30 2009-04-30 Durability traceless repair method for road and bridge concrete Expired - Fee Related CN101876162B (en)

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