CN113756605A - Construction method for waterproof renovation of railway concrete roof - Google Patents
Construction method for waterproof renovation of railway concrete roof Download PDFInfo
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- CN113756605A CN113756605A CN202111070432.6A CN202111070432A CN113756605A CN 113756605 A CN113756605 A CN 113756605A CN 202111070432 A CN202111070432 A CN 202111070432A CN 113756605 A CN113756605 A CN 113756605A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0281—Repairing or restoring roofing or roof covering
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D111/00—Coating compositions based on homopolymers or copolymers of chloroprene
- C09D111/02—Latex
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D121/00—Coating compositions based on unspecified rubbers
- C09D121/02—Latex
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D7/00—Roof covering exclusively consisting of sealing masses applied in situ; Gravelling of flat roofs
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention relates to the technical field of concrete roof waterproofing, in particular to a construction method for waterproofing and renovating a railway concrete roof. The invention removes the old waterproof layer; coating or spraying a water-based bottom coat on the cleaned concrete base surface, after the surface is dried, coating a liquid coiled material on the detail nodes, paving and pasting non-woven fabrics, then coating the liquid coiled material, and after the surface is dried, spraying a liquid coiled material on the whole concrete base surface; and spraying a quick-setting waterproof coating on the dried liquid coiled material, and drying to form a high-elastic weather-resistant waterproof layer. Through the interaction among the sand-fixing base coat, the water-based base coat, the liquid coiled material and the spraying quick-setting waterproof coating, the difficult problem of waterproof renovation of the railway concrete roof is thoroughly solved, the aging resistance life of the roof is prolonged, the service life of the roof is prolonged, and the maintenance cost is reduced.
Description
Technical Field
The invention relates to the technical field of water proofing of a hydraulic concrete roof, in particular to a construction method for water proofing and renovating a railway concrete roof.
Background
The waterproof layer of the existing railway concrete station room canopy roof is basically a modified asphalt waterproof coiled material, the original waterproof layer of the platform canopy roof is poor in aging resistance, and unstable factors such as hollowing, cracking and shelling appear in succession, and meanwhile, the aged coiled material also loses the waterproof performance, so that the risk of water leakage is caused at any time. Aiming at the failure state of the coiled material, the method relates to various factors such as proper materials, material quality, construction process, rainwater components and the like, and optimizes the maintenance construction scheme so as to ensure the construction quality and the service life of the waterproof coating and the operation safety of high-speed rails.
The spraying quick-setting rubber asphalt waterproof coating takes high-molecular rubber emulsion and superfine modified emulsified asphalt as main components, a special curing agent is added, the high-molecular rubber emulsion and the superfine modified emulsified asphalt are sprayed by a bi-component spray gun and then are mixed in a cross way in the air to reach a base surface instantly and be cured into a film, and the whole seamless high polymer film can be formed within 3 seconds. Due to excellent weather resistance, bonding performance and construction efficiency, the waterproof adhesive is very suitable for waterproof maintenance engineering of roofs.
For the coating, three-part products and seven-part construction are very important, the construction method is very important, a good construction process can well express the performance of a coating film, so that a good waterproof effect is ensured, the coating is particularly important for roof waterproof maintenance projects, various on-site environmental conditions are poorer than those of a newly-built project, especially the strength of a base surface is poorer, the working condition is complex, the selection and the method of various auxiliary materials are matched with those of the site, and the coatings of all the layers of structures are perfectly complementary, so that the project can achieve the watertight effect.
Therefore, how to provide a construction method for waterproof renovation of a railway concrete roof, which solves the difficult problem of waterproof renovation of the railway concrete roof, increases the aging-resistant life and the service life of the roof, and reduces the maintenance cost, is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a construction method for waterproof renovation of a railway concrete roof, which solves the problem of waterproof renovation of the railway concrete roof, prolongs the aging resistance of the roof, prolongs the service life of the roof and reduces the maintenance cost.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a construction method for waterproof renovation of a railway concrete roof, which comprises the following steps:
(1) removing the old waterproof layer, repairing cracks, holes and other defects of a concrete base surface which affect waterproof construction, wherein arc-wiping treatment is needed on the internal corner part; cleaning the sand-blown roof concrete, and then brushing or spraying a sand-fixing base coat;
(2) coating or spraying a water-based bottom coat on the cleaned concrete base surface, after the surface is dried, coating a liquid coiled material on the detail nodes, paving and pasting non-woven fabrics, then coating the liquid coiled material, and after the surface is dried, spraying a liquid coiled material on the concrete base surface integrally;
(3) and spraying a quick-setting waterproof coating on the dried liquid coiled material, and drying to form a high-elastic weather-resistant waterproof layer.
Preferably, the liquid coiled material of the step (2) is composed of the following components in parts by weight: 20-40 parts of water-based rubber emulsion, 30-40 parts of emulsified asphalt, 30-40 parts of filler and 1-5 parts of auxiliary agent.
Preferably, the aqueous rubber emulsion for the liquid coiled material comprises one or more of aqueous polyurethane dispersoid, neoprene latex and styrene-acrylic emulsion, the solid content is more than or equal to 50 percent, and the glass transition temperature is less than or equal to-20 ℃.
Preferably, the emulsified asphalt for the liquid coiled material is one or more of cationic emulsified asphalt, SBS modified cationic emulsified asphalt, nonionic emulsified asphalt and SBS modified nonionic emulsified asphalt, and the solid content is more than or equal to 60%.
Preferably, the quick-setting waterproof coating in the step (3) is composed of A, B two components according to a weight ratio of 10: 1-2; the component A is prepared from the following raw materials in parts by mass: 40-50 parts of anionic emulsified asphalt, 50-60 parts of water-based rubber emulsion, 5-10 parts of filler, 15-30 parts of flame retardant and 1-5 parts of auxiliary agent; the component B is a coagulant.
Preferably, the anionic emulsified asphalt for the quick-setting waterproof coating is quick-cracking emulsified asphalt and comprises one or more of common anionic emulsified asphalt, SBS modified anionic emulsified asphalt and latex modified anionic emulsified asphalt, the solid content is more than or equal to 60%, and the penetration degree is 70-90.
Preferably, the step (1) is to clean the sand-blown roof concrete and then brush or spray a sand-fixing base coat, so that the base surface is restored to be firm, flat and free of sand-blowing.
Preferably, the construction thickness of the liquid coiled material is 0.1-0.5 mm, the solid content is more than or equal to 65%, the viscosity is more than or equal to 3000cp, the low-temperature flexibility is less than or equal to-20 ℃, and the tensile strength is more than or equal to 0.5 MPa.
Preferably, the step (3) of spraying the quick-setting waterproof coating is to spray A, B two components of the quick-setting waterproof coating onto the liquid coiled material after the two components are crossly mixed outside a gun barrel of a spraying machine; the construction thickness of the spraying quick-setting waterproof coating is 1.5-5 mm, the tensile strength is more than or equal to 1.2MPa, the low-temperature flexibility is less than or equal to minus 30 ℃, and the flame retardant grade reaches B1 grade.
Preferably, the sand-fixing base coat in the step (1) is a water-based acrylic emulsion, and the glass transition temperature is more than 15 ℃.
Preferably, the water-based primer in the step (2) is a water-based epoxy primer, and the adhesion force with concrete is more than 3 MPa.
Preferably, the filler is one or more of calcium carbonate, talcum powder, mica powder and bentonite.
Preferably, the auxiliary agent is one or more of a defoaming agent, a dispersing agent, a wetting agent, a thickening agent, a reinforcing agent, a coupling agent and an adhesion promoter.
Preferably, the defoaming agent is one or more of organic silicon, polyether emulsion and mineral oil; the wetting agent is a silanol wetting agent; the thickener is one or more of cellulose, bentonite gas-phase silicon dioxide and polyurethane thickener; the reinforcing agent is one or more of modified silicon dioxide, sulfur and zinc oxide; the coupling agent is a silane coupling agent.
Preferably, the water-based finish coat can be applied after the sprayed quick-setting waterproof coat is completely dried, and the spraying, brushing or rolling method is adopted for construction, so that the effects of weather resistance, reflection heat insulation and heat preservation are achieved, and the durability of the waterproof layer is improved.
Preferably, the water-based finish paint layer is constructed twice, and the next time can be constructed after the surface of the former time is dried.
Preferably, the finish coat is one or more of a water-based pure acrylic acid high-elasticity waterproof coating, a water-based organic silicon high-elasticity waterproof coating and a water-based polyurethane high-elasticity waterproof coating.
Preferably, the construction thickness of the finish coat is 0.1-1 mm, the elongation is more than or equal to 500%, and no crack is generated when the artificial accelerated aging is more than or equal to 2000 h.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. by using the sand consolidation primer, the problem of treatment of the base surface of the sand-raised concrete is solved, the cost of base surface treatment is reduced, and the construction efficiency and the waterproof effect are improved;
2. the use of the water-based base coat improves the adhesive force of the waterproof coating, can ensure that the coating does not fall off or bulge, and prolongs the service life;
3. the use of the liquid coiled material prolongs the curing time, improves the permeability of the whole waterproof coating to a base surface, plays a role in isolating the B component coagulant of the sprayed quick-setting waterproof coating, prevents the inorganic salt component from permeating a concrete structure, and improves the endurance life of the structure. Meanwhile, the liquid coiled material formula contains components capable of reacting with concrete components, so that the adhesive force of the sprayed quick-setting waterproof coating and the base layer is increased, the situations that a waterproof layer is in a pinhole and is separated from the base layer are avoided, particularly the phenomenon that a coating film is separated from the base layer due to high-temperature exposure is avoided, and the waterproof layer is ensured to be attached to the base layer all the time;
4. the use of the spraying quick-setting waterproof coating improves the defects of poor aging resistance, non-flame retardance and easy lifting of the conventional waterproof coiled material, which influence the driving safety, and prolongs the service life of the coating;
5. the use of the water-based finish paint can improve the color of the sprayed quick-setting waterproof coating, protect the sprayed quick-setting coating and enhance the aging resistance of the whole waterproof coating.
Detailed Description
The invention provides a construction method for waterproof renovation of a railway concrete roof, which comprises the following steps:
(1) removing the old waterproof layer, repairing cracks, holes and other defects of a concrete base surface which affect waterproof construction, wherein arc-wiping treatment is needed on the internal corner part; cleaning the sand-blown roof concrete, and then brushing or spraying a sand-fixing base coat;
(2) coating or spraying a water-based bottom coat on the cleaned concrete base surface, after the surface is dried, coating a liquid coiled material on the detail nodes, paving and pasting non-woven fabrics, then coating the liquid coiled material, and after the surface is dried, spraying a liquid coiled material on the whole concrete base surface;
(3) and spraying a quick-setting waterproof coating on the dried liquid coiled material, and drying to form a high-elastic weather-resistant waterproof layer.
Preferably, the liquid coiled material in the step (2) is composed of the following components in parts by weight: 20-40 parts of water-based rubber emulsion, 30-40 parts of emulsified asphalt, 30-40 parts of filler and 1-5 parts of auxiliary agent; more preferably: 30 parts of water-based rubber emulsion, 35 parts of emulsified asphalt, 35 parts of filler and 3 parts of auxiliary agent.
Preferably, the aqueous rubber emulsion for the liquid coiled material comprises one or more of aqueous polyurethane dispersoid, neoprene latex and styrene-acrylic emulsion, the solid content is more than or equal to 50 percent, and the glass transition temperature is less than or equal to-20 ℃; more preferably, the aqueous rubber emulsion for liquid coiled material is styrene-acrylic emulsion.
Preferably, the emulsified asphalt for the liquid coiled material is one or more of cationic emulsified asphalt, SBS modified cationic emulsified asphalt, nonionic emulsified asphalt and SBS modified nonionic emulsified asphalt, and the solid content is more than or equal to 60 percent; more preferably, the emulsified asphalt for the liquid coiled material is SBS modified cation emulsified asphalt.
Preferably, the quick-setting waterproof coating in the step (3) is composed of A, B two components according to the weight ratio of 10: 1-2; the component A is prepared from the following raw materials in parts by mass: 40-50 parts of anionic emulsified asphalt, 50-60 parts of water-based rubber emulsion, 5-10 parts of filler, 15-30 parts of flame retardant and 1-5 parts of auxiliary agent; the component B is a coagulant.
Preferably, the anionic emulsified asphalt for the quick-setting waterproof coating is quick-cracking emulsified asphalt which comprises one or more of common anionic emulsified asphalt, SBS modified anionic emulsified asphalt and latex modified anionic emulsified asphalt, the solid content is more than or equal to 60 percent, and the penetration degree is 70-90; more preferably, the anionic emulsified asphalt for the quick-setting waterproof coating is SBS modified anionic emulsified asphalt.
Preferably, step (1) is to clean the sand-blown roof concrete and then brush or spray a sand-fixing base coat, so that the base surface is restored to be firm and flat without sand-blowing.
Preferably, the construction thickness of the liquid coiled material is 0.1-0.5 mm, the solid content is more than or equal to 65%, the viscosity is more than or equal to 3000cp, the low-temperature flexibility is less than or equal to-20 ℃, and the tensile strength is more than or equal to 0.5 MPa; further preferably, the construction thickness of the liquid coiled material is 0.3-0.5 mm
Preferably, the step (3) of spraying the quick-setting waterproof coating is to spray A, B two components of the quick-setting waterproof coating onto the liquid coiled material after the two components are mixed in a crossed manner outside a gun barrel of a spraying machine; the construction thickness of the sprayed quick-setting waterproof coating is 1.5-5 mm, the tensile strength is more than or equal to 1.2MPa, the low-temperature flexibility is less than or equal to minus 30 ℃, and the flame retardant grade reaches B1 grade; further preferably, the construction thickness of the sprayed rapid-hardening waterproof coating is 3-4 mm.
Preferably, the sand-fixing base coat in the step (1) is a water-based acrylic emulsion, and the glass transition temperature is more than 15 ℃.
Preferably, the water-based primer in the step (2) is a water-based epoxy primer, and the adhesion force with concrete is more than 3 MPa.
Preferably, the water-based base coat in the step (2) is a water-based epoxy base coat, and is prepared from liquid epoxy resin, a water-based curing agent and water according to the ratio of 1:1: 1.
Preferably, the filler is one or more of calcium carbonate, talcum powder, mica powder and bentonite.
Preferably, the auxiliary agent is one or more of a defoaming agent, a dispersing agent, a wetting agent, a thickening agent, a reinforcing agent, a coupling agent and an adhesion promoter.
Preferably, the defoaming agent is one or more of organic silicon, polyether emulsion and mineral oil; the wetting agent is a silanol wetting agent; the thickener is one or more of cellulose, bentonite gas-phase silicon dioxide and polyurethane thickener; the reinforcing agent is one or more of modified silicon dioxide, sulfur and zinc oxide; the coupling agent is a silane coupling agent.
Preferably, the water-based finish coat can be applied after the sprayed quick-setting waterproof coat is completely dried, and the spraying, brushing or rolling method is adopted for construction, so that the effects of weather resistance, reflection heat insulation and heat preservation are achieved, and the durability of the waterproof layer is improved.
Preferably, the water-based finish paint layer is constructed twice, and the next time can be constructed after the surface of the former time is dried.
Preferably, the finish coat is one or more of a water-based pure acrylic acid high-elasticity waterproof coating, a water-based organic silicon high-elasticity waterproof coating and a water-based polyurethane high-elasticity waterproof coating.
Preferably, the construction thickness of the finish coat is 0.1-1 mm, the elongation is more than or equal to 500%, and no crack is generated when the artificial accelerated aging is more than or equal to 2000 h; further preferably, the construction thickness of the finish coating is 0.5-0.8 mm.
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A construction method for waterproof renovation of a railway concrete roof comprises the following steps:
(1) removing the old waterproof layer, repairing cracks, holes and other defects of a concrete base surface which affect waterproof construction, wherein arc-wiping treatment is needed on the internal corner part; cleaning the sand-blown roof concrete, and then brushing or spraying the water-based acrylic emulsion;
(2) coating the cleaned concrete base surface with a water-based epoxy bottom coat, after the surface is dried, coating a liquid coiled material on a detail node, paving a non-woven fabric, then coating the liquid coiled material, and after the surface is dried, integrally spraying the liquid coiled material on the concrete base surface;
(3) and spraying a quick-setting waterproof coating on the dried liquid coiled material, wherein the construction thickness is 1.5mm, and a high-elastic weather-resistant waterproof layer can be formed after drying.
In the embodiment, the water-based epoxy primer coating is prepared from liquid epoxy resin, a water-based curing agent and water according to the ratio of 1:1: 1;
the construction thickness of each time of the liquid coiled material is 0.1mm, and the specification of the non-woven fabric is 60g/m2(ii) a The liquid coiled material comprises the following components in parts by weight: 20 parts of aqueous polyurethane dispersoid, 30 parts of cationic emulsified asphalt, 20 parts of calcium carbonate, 10 parts of talcum powder, 0.5 part of ammonium polyacrylate dispersant and 0.5 part of SURFYNOL-104E wetting agent;
the quick-setting waterproof coating is composed of A, B two components according to the weight ratio of 10:1, and the quick-setting waterproof coating component A is composed of: 40 parts of common anionic emulsified asphalt, 60 parts of water-based rubber emulsion, 3 parts of calcium carbonate, 2 parts of talcum powder, 3 parts of mica powder, 2 parts of bentonite, 15 parts of alkyl phosphate flame retardant, 0.3 part of polydimethylsiloxane, 0.4 part of polyurethane thickener and 0.3 part of silane coupling agent.
Example 2
A construction method for waterproof renovation of a railway concrete roof comprises the following steps:
(1) removing the old waterproof layer, repairing cracks, holes and other defects of a concrete base surface which affect waterproof construction, wherein arc-wiping treatment is needed on the internal corner part; cleaning the sand-blown roof concrete, and then brushing or spraying the water-based acrylic emulsion;
(2) spraying a water-based epoxy bottom coat on the cleaned concrete base surface, after the surface is dried, firstly coating a liquid coiled material on a detail node, then paving a non-woven fabric, then coating the liquid coiled material, and after the surface is dried, integrally spraying a liquid coiled material on the concrete base surface;
(3) spraying quick-setting waterproof paint on the dried liquid coiled material, wherein the construction thickness is 3mm, and a high-elastic weather-resistant waterproof layer can be formed after drying;
(4) and after the surface of the water-based organic silicon high-elastic waterproof paint is sprayed and dried, the water-based organic silicon high-elastic waterproof paint is sprayed, wherein the total construction thickness of the finish paint is 0.7 mm.
In the embodiment, the water-based epoxy primer coating is prepared from liquid epoxy resin, a water-based curing agent and water according to the ratio of 1:1: 1;
the construction thickness of each time of the liquid coiled material is 0.3mm, and the specification of the non-woven fabric is 70g/m2(ii) a The liquid coiled material comprises the following components in parts by weight: 30 parts of styrene-acrylic emulsion, 30-40 parts of SBS modified cationic emulsified asphalt, 25 parts of calcium carbonate, 5 parts of talcum powder, 5 parts of mica powder, 1 part of sodium polyacrylate dispersant, 1 part of SURFYNOL-104A wetting agent, 1 part of polyurethane thickener and 1 part of silane coupling agent;
the quick-setting waterproof coating consists of A, B components in a weight ratio of 10:1.5, wherein the quick-setting waterproof coating component A comprises the following components: 50 parts of SBS modified anionic emulsified asphalt, 50 parts of water-based rubber emulsion, 2 parts of calcium carbonate, 1 part of talcum powder, 1 part of mica powder, 1 part of bentonite, 30 parts of decabromodiphenyl ether flame retardant, 1 part of polydimethylsiloxane, 1 part of zinc oxide and 1 part of silane coupling agent.
Example 3
A construction method for waterproof renovation of a railway concrete roof comprises the following steps:
(1) removing the old waterproof layer, repairing cracks, holes and other defects of a concrete base surface which affect waterproof construction, wherein arc-wiping treatment is needed on the internal corner part; cleaning the sand-blown roof concrete, and then brushing or spraying the water-based acrylic emulsion;
(2) coating the cleaned concrete base surface with a water-based epoxy bottom coat, after the surface is dried, coating a liquid coiled material on a detail node, paving a non-woven fabric, then coating the liquid coiled material, and after the surface is dried, integrally spraying the liquid coiled material on the concrete base surface;
(3) spraying quick-setting waterproof paint on the dried liquid coiled material, wherein the construction thickness is 5mm, and a high-elastic weather-resistant waterproof layer can be formed after drying;
(4) and after the surface of the water-based organic silicon high-elastic waterproof paint is sprayed and dried, the water-based organic silicon high-elastic waterproof paint is sprayed, wherein the construction thickness of the finish paint is 1mm in total.
In the embodiment, the water-based epoxy primer coating is prepared from liquid epoxy resin, a water-based curing agent and water;
the construction thickness of each time of the liquid coiled material is 0.5mm, and the specification of the non-woven fabric is 80g/m2(ii) a The liquid coiled material comprises the following components in parts by weight: 40 parts of neoprene latex, 40 parts of SBS modified nonionic emulsified asphalt, 10 parts of calcium carbonate, 10 parts of talcum powder, 10 parts of mica powder, 10 parts of bentonite, 0.5 part of polyacrylic acid sodium salt dispersing agent, 0.5 part of SURFYNOL-104H wetting agent, 2 parts of polyurethane thickening agent, 1 part of zinc oxide and 1 part of silane coupling agent;
the quick-setting waterproof coating is composed of A, B two components according to the weight ratio of 10:2, and the quick-setting waterproof coating component A is composed of: 45 parts of latex modified anionic emulsified asphalt, 55 parts of water-based rubber emulsion, 3 parts of calcium carbonate, 2 parts of talcum powder, 2 parts of mica powder, 1 part of bentonite, 20 parts of decabromodiphenyl ether flame retardant, 3 parts of polydimethylsiloxane, 1 part of polyurethane thickener and 1 part of silane coupling agent.
The concrete roof samples of the embodiments 1-3 are respectively detected according to the technical index requirements of spraying rubber asphalt on the 2 nd part of the sprayed film waterproof material of the Q/CR517.2-2016 railway engineering, and the detection structures all meet the requirements of related performance indexes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A construction method for waterproof renovation of a railway concrete roof is characterized by comprising the following steps:
(1) removing the old waterproof layer, repairing cracks, holes and other defects of a concrete base surface which affect waterproof construction, wherein arc-wiping treatment is needed on the internal corner part; cleaning the sand-blown roof concrete, and then brushing or spraying a sand-fixing base coat;
(2) coating or spraying a water-based bottom coat on the cleaned concrete base surface, after the surface is dried, coating a liquid coiled material on the detail nodes, paving and pasting non-woven fabrics, then coating the liquid coiled material, and after the surface is dried, spraying a liquid coiled material on the concrete base surface integrally;
(3) and spraying a quick-setting waterproof coating on the dried liquid coiled material, and drying to form a high-elastic weather-resistant waterproof layer.
2. The construction method for waterproof renovation of the railway concrete roof as claimed in claim 1, wherein the liquid coiled material of the step (2) comprises the following components in parts by weight: 20-40 parts of water-based rubber emulsion, 30-40 parts of emulsified asphalt, 30-40 parts of filler and 1-5 parts of auxiliary agent.
3. The construction method for waterproof renovation of the railway concrete roof as claimed in claim 1, wherein the quick-setting waterproof coating of the step (3) is composed of A, B two components according to the weight ratio of 10: 1-2; the component A is prepared from the following raw materials in parts by mass: 40-50 parts of anionic emulsified asphalt, 50-60 parts of water-based rubber emulsion, 5-10 parts of filler, 15-30 parts of flame retardant and 1-5 parts of auxiliary agent; the component B is a coagulant.
4. The construction method for waterproof renovation of the railway concrete roof as claimed in claim 1 or 2, characterized in that the construction thickness of the liquid coiled material is 0.1-0.5 mm, the solid content is more than or equal to 65%, the viscosity is more than or equal to 3000cp, the low-temperature flexibility is less than or equal to-20 ℃, and the tensile strength is more than or equal to 0.5 MPa.
5. The method for waterproofing and renovating the concrete roof of the railway according to the claim 1 or 3, characterized in that the step (3) of spraying the quick-setting waterproof paint is that A, B two components of the quick-setting waterproof paint are sprayed on the liquid coiled material after being mixed in a crossed way outside the gun barrel of the spraying machine; the construction thickness of the spraying quick-setting waterproof coating is 1.5-5 mm, the tensile strength is more than or equal to 1.2MPa, and the low-temperature flexibility is less than or equal to minus 30 ℃.
6. The method for constructing the railway concrete roof for water-proofing and renovation as claimed in claim 1, wherein the sand-fixing primer in the step (1) is a water-based acrylic emulsion, and the glass transition temperature is more than 15 ℃.
7. The construction method for waterproof renovation of the railway concrete roof as claimed in claim 1, wherein the water-based primer in the step (2) is a water-based epoxy primer, and the adhesion with concrete is more than 3 MPa.
8. The construction method for waterproof renovation of the railway concrete roof as claimed in any one of claims 1 to 3, wherein the auxiliary agent is one or more of a defoaming agent, a dispersing agent, a wetting agent, a thickening agent, a reinforcing agent, a coupling agent and an adhesion promoter.
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Cited By (1)
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| CN115160913A (en) * | 2022-06-24 | 2022-10-11 | 重庆科顺新材料科技有限公司 | Liquid waterproof coiled material and preparation method and use method thereof |
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