CN113107102A - Building waterproof structure - Google Patents
Building waterproof structure Download PDFInfo
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- CN113107102A CN113107102A CN202110279539.5A CN202110279539A CN113107102A CN 113107102 A CN113107102 A CN 113107102A CN 202110279539 A CN202110279539 A CN 202110279539A CN 113107102 A CN113107102 A CN 113107102A
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- Prior art keywords
- asphalt
- waterproof coating
- waterproof
- asphalt waterproof
- layer
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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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
- C09D115/00—Coating compositions based on rubber derivatives
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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
-
- 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
- C09D7/63—Additives non-macromolecular organic
Abstract
The invention discloses a building waterproof structure, which comprises a concrete base material layer, an asphalt waterproof coating layer covered on the concrete base material layer, and a waterproof coil material layer covered on the concrete base material layer, wherein the asphalt waterproof coating layer is formed by asphalt waterproof coating, and the raw material formula of the asphalt waterproof coating comprises 20-50% of low-polarity polyol, 1-10% of silane coupling agent containing isocyanate groups, 10-30% of petroleum asphalt, 20-50% of filler, 0.1-1% of catalyst and 1-10% of auxiliary agent according to the total mass of the asphalt waterproof coating. The building waterproof structure can be constructed at normal temperature, avoids the use of organic solvents during construction, and is safer and more environment-friendly; the building waterproof structure has high reliability, and the waterproof coating layer has good elasticity and extensibility, good bonding performance to a concrete base layer and a waterproof coiled material, and wide application prospect.
Description
Technical Field
The invention particularly relates to a building waterproof structure.
Background
In order to improve the waterproof performance of a waterproof structure of a building, a concrete substrate layer is usually compounded with a waterproof coiled material, at present, in order to improve the reliability of the waterproof structure of the building, a layer of PU coating is usually coated on the concrete substrate layer, and then an asphalt waterproof coiled material is coated on the PU coating, but the bonding performance of the existing PU coating to the concrete substrate layer and the asphalt waterproof coiled material is not good, the problem of delamination and the like is easy to occur, the waterproof performance is influenced, and the price of the PU coating is high. The asphalt has excellent corrosion and water resistance, wide sources and low price, and the asphalt waterproof coating is more and more widely applied in the field of building waterproofing.
The traditional asphalt-based waterproof coating is prepared by adding elastic rubbers such as SBS, SBR, SIS and the like to improve the high and low temperature resistance and elasticity of asphalt, so that the viscosity of the asphalt-based waterproof coating is obviously increased, high-temperature hot melting construction or addition of a large amount of plasticizer and organic solvent is required for reducing the viscosity to facilitate construction, the potential safety hazard of production and construction can be increased due to the existence of the solvent, and the environment can be polluted. And the addition of the plasticizers such as engine oil, naphthenic oil, aromatic oil and the like can cause the plasticizers to easily migrate out, so that the base surface is polluted, the asphalt coating is hardened and delaminated from the base layer, and the service life of the asphalt waterproof coating is shortened.
Disclosure of Invention
The invention aims to solve the technical problem of providing a building waterproof structure which can be constructed at normal temperature and has safety and high reliability.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a building waterproof structure, which comprises a concrete base material layer, an asphalt waterproof coating layer covered on the concrete base material layer, and a waterproof roll material layer covered on the concrete base material layer, wherein the asphalt waterproof coating layer is formed by asphalt waterproof coating, and the raw material formula of the asphalt waterproof coating comprises 20-50% of low-polarity polyol, 1-10% of silane coupling agent containing isocyanate groups, 10-30% of petroleum asphalt, 20-50% of filler, 0.1-1% of catalyst and 1-10% of auxiliary agent according to the total mass of the asphalt waterproof coating.
Preferably, the raw material formula of the asphalt waterproof coating does not contain organic solvents and plasticizers.
According to one embodiment, the raw materials of the asphalt waterproofing paint consist of the low polarity polyol, the silane coupling agent containing isocyanate groups, the petroleum asphalt, the filler, the catalyst and the auxiliary.
Wherein, the low polarity polyol is a polyol compound which contains hydroxyl groups at both ends of a molecular chain and does not contain a polar group on a main chain.
Preferably, the low polarity polyol is one having a viscosity (40 ℃) of < 10Pa.s, polyol having a number average molecular weight of 1000 to 6000 and a hydroxyl value of 0.4 to 1 mmol/g.
According to a particular and preferred embodiment, the low polarity polyol is a hydroxyl terminated polybutadiene. Preferably, the hydroxyl-terminated polybutadiene has a number average molecular weight of 1000 to 6000, and more preferably 2500 to 4500.
Preferably, the hydroxyl-terminated polybutadiene has an average functionality of 2 to 3.
The hydroxyl-terminated polybutadiene is also called HTPB polymer in the chemical industry, and finished products of the hydroxyl-terminated polybutadiene can be purchased from chemical markets, and are preferably HTPB-IV, HTPB-I, HTPB-II, HTPB-III and the like which are products of Yingkou Tianyuan chemical research institute, Inc.
Further preferably, the silane coupling agent containing an isocyanate group is 3-isocyanatopropylmethyldimethoxysilane and/or 3-isocyanatopropyltrimethoxysilane.
Preferably, the feeding mass ratio of the low-polarity polyol to the silane coupling agent containing isocyanate groups is 5-12: 1.
The petroleum asphalt is petroleum asphalt meeting various indexes of the technical standard (GB/T15180).
Preferably, the petroleum asphalt is one or a combination of more of petroleum asphalt AH-70, AH-90, AH-110 and AH-130.
Preferably, the filler is one or a combination of several of talcum powder, kaolin, mica powder and calcium carbonate, wherein the calcium carbonate is superfine light calcium carbonate and/or heavy calcium carbonate.
Preferably, the catalyst is an organotin catalyst and/or a carboxylate catalyst.
Specifically, the catalyst includes, but is not limited to, one or a combination of several of dibutyl tin dilaurate, stannous octoate, or lead isooctanoate.
Preferably, the raw material formula of the asphalt waterproof coating also comprises an auxiliary agent with the feeding mass of 1-10% of the total mass of the raw material formula of the asphalt waterproof coating, wherein the auxiliary agent is one or more of an antioxidant, a dehydrating agent, an adhesion promoter and an anti-sagging agent.
Further preferably, the feeding mass of the antioxidant is 0.1-1% of the total mass of the raw material formula of the asphalt waterproof coating.
Further preferably, the feeding mass of the dehydrating agent is 0.1-1% of the total mass of the raw material formula of the asphalt waterproof coating;
further preferably, the feeding mass of the adhesion promoter is 0.5-2% of the total mass of the raw material formula of the asphalt waterproof coating;
further preferably, the feeding mass of the anti-sagging agent is 0.5-2% of the total mass of the raw material formula of the asphalt waterproof coating.
Further preferably, the antioxidant is one or a combination of several of a peroxide decomposition type antioxidant, a free radical scavenging type antioxidant and a metal deactivation type antioxidant.
Specifically, the antioxidant includes, but is not limited to, zinc dialkyl dithiophosphate, zinc dialkyl dithiocarbamate, N-phenyl-a-naphthylamine, alkyl thiophene oxazine, benzotriazole derivative, and mercaptobenzothiazole derivative.
Further preferably, the dehydrating agent is one or a combination of several of a molecular sieve, a silane coupling agent with vinyl, an aldimine moisture scavenger, a ketimine moisture scavenger and an oxazolidine moisture scavenger.
Specifically, the vinyl silane coupling agent is preferably vinyl trimethoxysilane, which undergoes a hydrolysis reaction.
Further preferably, the adhesion promoter is one or a combination of N- (2-aminoethyl) -3-aminopropyldimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldiethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and N- (2-aminoethyl) -3-aminopropyltriethoxysilane.
Further preferably, the anti-sagging agent is a macromolecular compound containing a polyurea structure.
Specifically, the finished product of the macromolecular compound containing the polyurea structure can be purchased from chemical markets, and is preferably RHEOBYK-410 or RHEOBYK-7410ET which are products of Bike chemical Co., Ltd.
According to one embodiment, the raw material formulation of the asphalt waterproof coating is as follows by mass percent:
further preferably: the asphalt waterproof coating comprises the following raw materials in percentage by mass:
specifically, the preparation method of the asphalt waterproof coating comprises the following steps:
adding the petroleum asphalt, the low-polarity polyol and the filler into a reaction container, mixing, heating to 130-140 ℃, and dehydrating a material system;
cooling to 70-90 ℃, and adding the silane coupling agent and the catalyst into the dehydrated material system for reaction to obtain a reacted mixture;
and cooling to 60 ℃ or below, adding an auxiliary agent into the reacted mixture, and uniformly mixing to obtain the asphalt waterproof coating.
Preferably, the thickness of the asphalt waterproof coating layer is 1-2 mm, more preferably 1.2-1.8 mm, and still more preferably 1.5 mm.
Preferably, the waterproof coiled material layer is an asphalt waterproof coiled material or a high-molecular waterproof coiled material.
The second aspect of the invention also provides a preparation method of the building waterproof structure, wherein the waterproof coiled material is pasted on the concrete substrate by using the asphalt waterproof coating at room temperature.
In particular, the building is a house, a tunnel, a dam or a bridge.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the building waterproof structure can be constructed at normal temperature, avoids the use of organic solvents during construction, and is safer and more environment-friendly; the building waterproof structure has high reliability, and the waterproof coating layer has good elasticity and extensibility, good bonding performance to a concrete base layer and a waterproof coiled material, and wide application prospect.
Detailed Description
The asphalt waterproof coating used in the invention is formed into a siloxane-terminated siloxane compound by condensing low-polarity polyol and a silane coupling agent containing isocyanate groups and siloxane groups, and on one hand, the siloxane compound is cured by moisture in the air when the coating is applied, so that the coating system is endowed with good elasticity and extensibility; on the other hand, the adopted low-polarity polyol, such as hydroxyl-terminated polybutadiene (the number average molecular weight is 1000-6000), has proper viscosity at normal temperature, has good compatibility with asphalt, can control the viscosity of a system and the dispersibility of the asphalt under the condition of not adding any solvent and plasticizer, can be directly constructed at normal temperature, and has a simpler and more convenient construction mode, and is more environment-friendly and safer. In addition, the asphalt waterproof coating used in the invention does not contain plasticizer, has good product stability and durability, has good cohesiveness to low-polarity asphalt waterproof coiled materials, can combine a concrete substrate and the asphalt coiled materials into an organic whole, and can greatly improve the reliability, durability and waterproof effect of a waterproof structure when used in the waterproof structure. Furthermore, the asphalt waterproof coating used in the invention is a single-component product, the raw materials are easy to obtain, the preparation method is simple, the asphalt waterproof coating is suitable for industrial large-scale production, and the packaging and transportation are convenient.
The present invention will be further described with reference to the following examples. However, the present invention is not limited to the following examples. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions not mentioned are conventional conditions in the industry. The technical features of the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides an asphalt waterproof coating and a preparation method thereof.
The asphalt waterproof coating comprises the following raw materials in parts by weight: 40 parts of low-polarity polyol (brand HTPB-IV, number average molecular weight 3000, Yingkou Tianyuan chemical research institute Co., Ltd.), 15 parts of petroleum asphalt 90 parts, 6 parts of silane coupling agent containing isocyanate group (3-isocyanate propyl methyl dimethoxy silane, brand T-02, Huaian Hongmeng new material Co., Ltd.), 36 parts of talcum powder (brand HS218, Haichi New Guangyuan powder material Co., Ltd.), 0.3 part of antioxidant (brand 1010, Beijing Yinghua chemical Co., Ltd.), 0.2 part of catalyst (T-12, Jiangsu Mingtai chemical Co., Ltd.), 0.5 part of dehydrating agent (SCA-V71T vinyl methyl dimethoxy silane, Nanjing Nengnengde New material technology Co., Ltd.), 1 part of adhesion promoter (SCA-A20T, Nanjing Nenene De technology Co., Ltd.), anti-sagging agent (RHEYEOK-410, german byk chemical) 1 part.
The preparation process of the asphalt waterproof coating comprises the following steps:
the first step is as follows: heating the jacket oil in the reaction kettle to 130 ℃, and adding the hot-melt petroleum asphalt, the low-polarity polyol and the talcum powder into the reaction kettle;
the second step is that: at the pressure of minus 0.08MPa, the temperature is controlled at 140 ℃, and the dehydration and the stirring are carried out for 2 hours;
the third step: introducing nitrogen, relieving negative pressure, cooling to 80 ℃, adding a silane coupling agent containing isocyanate groups and a catalyst, and stirring and mixing for 2 hours at 80-85 ℃;
the fourth step: cooling to 60 deg.C, adding dehydrating agent, adhesion promoter and anti-sagging agent, stirring for 20min, discharging and packaging.
Example 2
The embodiment provides an asphalt waterproof coating and a preparation method thereof.
The asphalt waterproof coating comprises the following raw materials in parts by weight: 40 parts of low-polarity polyol (brand HTPB-IV, number average molecular weight 3000, Yingkou Tianyuan chemical research institute Co., Ltd.), 15 parts of petroleum asphalt 90 parts, 6.5 parts of silane coupling agent containing isocyanate group (3-isocyanate propyl trimethoxy silane, brand T-03, Huaian Hongtian New Material Co., Ltd.), 35.5 parts of calcium carbonate (brand GY-216, Haichi New Guangyuan powder Material Co., Ltd.), 0.3 part of antioxidant (brand 618, Beijing Yingyi chemical Co., Ltd.), 0.2 part of catalyst (T-12, Jiangsu Tai chemical Co., Ltd.), 0.5 part of dehydrating agent (SCA-V71T vinyl methyl dimethoxy silane, Nanjing Nengnengde New Material technology Co., Ltd.), 1 part of adhesion promoter (SCA-A20T, Nanjing Nengnene De technology Co., Ltd.), anti-sticking agent (EOBYK-430, german byk chemical) 1 part.
The preparation process of the asphalt waterproofing paint is the same as that of example 1.
Example 3
The embodiment provides an asphalt waterproof coating and a preparation method thereof.
The asphalt waterproof coating comprises the following raw materials in parts by weight: 40 parts of low-polarity polyol (brand HTPB-I, the number average molecular weight of 4200, Yingkou Tianyuan chemical research institute Co., Ltd.), 15 parts of 100 parts of petroleum asphalt, 4 parts of silane coupling agent containing isocyanate groups (3-isocyanate propyl methyl dimethoxy silane, brand T-02, Huai 'an Hongmeng new material Co., Ltd.), 38 parts of talcum powder (brand HS218, Haichi's new widely sourced powder material Co., Ltd.), and 0.3 part of antioxidant (brand 1010, Beijing extremely easy chemical Co., Ltd.), 0.2 part of catalyst (T-12, Jiangsu famous Tai chemical Co., Ltd.), 0.5 part of dehydrating agent (LH-103 oxazolidine, Suzhou non-brother new material science and technology Co., Ltd.), 1 part of adhesion promoter (SCA-A20M, Nanjing Neede new material technology Co., Ltd.), and 1 part of anti-sagging agent (RHEOBYK-410, Germany Pickery chemical).
The preparation process of the asphalt waterproofing paint is the same as that of example 1.
Comparative example 1
The comparative example provides a non-cured rubber asphalt waterproof coating meeting JC/T2428-2017 index and a preparation method thereof.
The non-cured rubber asphalt waterproof coating comprises the following raw materials in parts by weight: 30 parts of No. 90 petroleum asphalt, 32 parts of No. 5 naphthenic oil, 2 parts of SBS, 6 parts of SBR, 2 parts of asphalt high-temperature modifier (high-temperature wax) and 28 parts of stone powder.
The preparation process of the non-cured rubber asphalt waterproof coating comprises the following steps:
the first step is as follows: heating the sleeve oil in the reaction kettle to raise the temperature to 140 ℃, and adding the hot-melt petroleum asphalt and the naphthenic oil into the reaction kettle;
the second step is that: adding SBS and SBR, continuing heating, controlling the temperature at 190 ℃ and stirring for 3 hours;
the third step: adding an asphalt high-temperature modifier, and stirring and mixing for 1 hour at 180-190 ℃;
the fourth step: adding stone powder, stirring and mixing for 1 hour at 180-190 ℃, discharging and packaging.
Example 4
The present embodiment provides a waterproof structure for buildings: the waterproof coating comprises a concrete base material layer (concrete with the strength of C25 grade according to GB50010-2010 concrete structure design specification), an asphalt waterproof coating layer (with the thickness of 1.5mm) coated on the concrete base material layer, and an elastomer modified asphalt waterproof coiled material (according to SBS I PY PE 3GB 18242 one 2008, the manufacturer is Jiuding Hongtai waterproof science and technology Co., Ltd. of Liaoning), wherein the asphalt waterproof coating layer is formed by the asphalt waterproof coating of the embodiment 1.
The construction process of the building waterproof structure comprises the following steps:
the first step is as follows: cleaning a concrete base layer, and keeping the base surface free of laitance, dust and clear water;
the second step is that: brushing asphalt waterproof paint, wherein the thickness of one construction reaches 1.5 mm;
the third step: and tearing off the PE film on the lower surface of the elastomer modified asphalt waterproof coiled material, and directly paving the asphalt coiled material on the asphalt coating.
Example 5
The present embodiment provides a waterproof structure for buildings: the waterproof coating comprises a concrete base material layer (concrete with the strength of C25 grade according to GB50010-2010 concrete structure design specification), an asphalt waterproof coating layer (with the thickness of 1.5mm) coated on the concrete base material layer, and an elastomer modified asphalt waterproof coiled material (according to SBS I PY PE 3GB 18242 one 2008, the manufacturer is Jiuding Hongtai waterproof science and technology Co., Ltd. of Liaoning), wherein the asphalt waterproof coating layer is formed by the asphalt waterproof coating of the embodiment 2.
The construction process of the waterproof structure of the building is the same as that of example 1.
Example 6
The present embodiment provides a waterproof structure for buildings: the waterproof coating comprises a concrete base material layer (concrete with the strength of C25 grade according to GB50010-2010 concrete structure design specification), an asphalt waterproof coating layer (with the thickness of 1.5mm) coated on the concrete base material layer, and an elastomer modified asphalt waterproof coiled material (according to SBS I PY PE 3GB 18242 one 2008, the manufacturer is Jiuding Hongtai waterproof science and technology Co., Ltd. of Liaoning), wherein the asphalt waterproof coating layer is formed by the asphalt waterproof coating of the embodiment 3.
The construction process of the waterproof structure of the building is the same as that of example 1.
Comparative example 2
The present embodiment provides a waterproof structure for buildings: the asphalt waterproof coating comprises a concrete base material layer (concrete with the strength of C25 grade according to GB50010-2010 concrete structure design specification), an asphalt waterproof coating layer (with the thickness of 1.5mm) coated on the concrete base material layer, and an elastomer modified asphalt waterproof coiled material (according to SBS I PY PE 3GB 18242 one 2008, the manufacturer is Jiuding Hongtai waterproof technology Co., Ltd. of Liaoning), wherein the asphalt waterproof coating layer is formed by the asphalt waterproof coating of the comparative example 1.
The construction process of the building waterproof structure comprises the following steps: basically the same as example 1, except that the non-curing rubber asphalt waterproof coating needs to be hot-melted at a temperature of 130 ℃ and 140 ℃ during construction.
The main performance indexes of the asphalt waterproof coatings of the examples 1 to 3 and the comparative example 1 were tested, and after the modified asphalt waterproof coatings of the examples 1 to 3 and the comparative example 1 were coated on a TPO waterproof roll and a modified asphalt waterproof roll respectively to form an asphalt waterproof coating layer (1.5mm), the peel strength of the asphalt waterproof coating layer, the TPO waterproof roll and the modified asphalt waterproof roll was tested, and the test results are shown in table 1. The heat aging treatment conditions were: the sample was placed in a constant temperature oven at 70 ℃ for 336 h.
TABLE 1
The building waterproof structures of the above examples 4 to 6 and comparative example 2 were subjected to performance tests, and the test methods and test results are shown in table 2. The high-low temperature circulating treatment conditions are as follows: the sample is placed in a constant temperature oven at 70 ℃ for 24h, is taken out and is placed in a standard test environment (the temperature is 23 +/-2 ℃, and the humidity is 50 +/-10 percent) for 2h, then is placed in a low temperature box at-20 ℃ for 24h, is taken out and is placed in the standard test environment for 2h, namely high-low temperature circulating treatment is carried out, and the high-low temperature circulating treatment is carried out for 7 times in total.
TABLE 2
Note: initial data are test results after 7 days of maintenance under standard test conditions.
Under different test conditions, the paint layers of examples 4-6 and comparative example 2 did not delaminate from the concrete layer.
As can be seen from tables 1 and 2: the building waterproof structure can be constructed at normal temperature, the construction safety is high, and the hot melting temperature of the coating in the comparative example 1 exceeds 100 ℃, so that potential safety hazards exist in the construction process; the building waterproof structure has high reliability, the asphalt waterproof coating layer of the building waterproof structure has large extension, the bonding performance with a waterproof coiled material is obviously superior to that of a comparative example 1, the building waterproof structure has better aging resistance and high and low temperature cycle resistance, and the comparative example 1 and the comparative example 2 are added with a large amount of plasticizer naphthenic oil in order to reduce the viscosity of the product, so that the plasticizer is easy to migrate and the service life of the product is shortened.
The present invention has been described in detail in order to enable those skilled in the art to understand the invention and to practice it, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.
Claims (10)
1. A waterproof structure for a building, characterized in that: the building waterproof structure comprises a concrete base material layer, an asphalt waterproof coating layer covered on the concrete base material layer, and a waterproof roll material layer covered on the concrete base material layer, wherein the asphalt waterproof coating layer is formed by asphalt waterproof coating, and the raw material formula of the asphalt waterproof coating comprises 20-50% of low-polarity polyol, 1-10% of silane coupling agent containing isocyanate groups, 10-30% of petroleum asphalt, 20-50% of filler, 0.1-1% of catalyst and 1-10% of auxiliary agent according to the total mass of the asphalt waterproof coating.
2. The waterproof construction for buildings according to claim 1, characterized in that: the raw material formula of the asphalt waterproof coating does not contain an organic solvent and a plasticizer.
3. The waterproof construction for buildings according to claim 1 or 2, characterized in that: the low-polarity polyol is hydroxyl-terminated polybutadiene, the number average molecular weight of the hydroxyl-terminated polybutadiene is 1000-6000, and the average functionality is 2-3.
4. The waterproof construction for buildings according to claim 1 or 2, characterized in that: the silane coupling agent containing isocyanate groups is 3-isocyanatopropyl methyl dimethoxy silane and/or 3-isocyanatopropyl trimethoxy silane.
5. The waterproof construction for buildings according to claim 1 or 2, characterized in that: the feeding mass ratio of the low-polarity polyol to the silane coupling agent containing isocyanate groups is 5-12: 1.
6. The waterproof construction for buildings according to claim 1 or 2, characterized in that: the petroleum asphalt is one or a combination of more of petroleum asphalt No. 70, No. 90, No. 100, No. 150 and No. 200; the filler is one or a combination of more of talcum powder, kaolin, mica powder and calcium carbonate; the catalyst is an organic tin catalyst and/or a carboxylate catalyst; the auxiliary agent is one or more of an antioxidant, a dehydrating agent, an adhesion promoter and an anti-sagging agent.
7. The waterproof construction for buildings according to claim 1 or 2, characterized in that: the feeding mass of the antioxidant is 0.1-1% of the total mass of the raw material formula of the asphalt waterproof coating; the feeding mass of the dehydrating agent is 0.1-1% of the total mass of the raw material formula of the asphalt waterproof coating; the feeding mass of the adhesion promoter is 0.5-2% of the total mass of the raw material formula of the asphalt waterproof coating; the feeding mass of the anti-sagging agent is 0.5-2% of the total mass of the raw material formula of the asphalt waterproof coating.
8. The waterproof construction for buildings according to claim 1 or 2, characterized in that: the preparation method of the asphalt waterproof coating comprises the following steps:
adding the petroleum asphalt, the low-polarity polyol and the filler into a reaction container, mixing, heating to 130-140 ℃, and dehydrating a material system;
cooling to 70-90 ℃, and adding the silane coupling agent and the catalyst into the dehydrated material system for reaction to obtain a reacted mixture;
and cooling to 60 ℃ or below, adding an auxiliary agent into the reacted mixture, and uniformly mixing to obtain the asphalt waterproof coating.
9. The waterproof construction for buildings according to claim 1 or 2, characterized in that: the thickness of pitch waterproof coating layer is 1 ~ 2mm, waterproofing membrane layer is pitch waterproofing membrane or polymer waterproofing membrane.
10. A method of producing a waterproof construction for buildings according to any one of claims 1 to 9, characterized in that: and (3) pasting the waterproof coiled material on the concrete substrate by using the asphalt waterproof coating at room temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113897137A (en) * | 2021-10-14 | 2022-01-07 | 南通科顺建筑新材料有限公司 | Rubber asphalt waterproof coating composition, preparation method thereof and building material |
| CN113897110A (en) * | 2021-03-16 | 2022-01-07 | 苏州中材非金属矿工业设计研究院有限公司 | Asphalt waterproof coating capable of being constructed at normal temperature and construction method thereof |
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| CN113897137A (en) * | 2021-10-14 | 2022-01-07 | 南通科顺建筑新材料有限公司 | Rubber asphalt waterproof coating composition, preparation method thereof and building material |
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| CN113107102B (en) | 2023-01-24 |
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