A modified asphalt waterproofing membrane with repairing function and preparation method thereof

Abstract

The present invention discloses a modified asphalt waterproofing roll with a repairing function, which comprises in sequence: an upper surface isolation layer, a repairing layer, a waterproofing layer, a base layer, a bonding layer and a lower surface isolation layer. The waterproofing roll product of the present invention has a repairing layer, and the repairing layer has low viscosity and strong temperature sensitivity; when the base waterproofing layer is damaged by the outside world after construction or leaks occur with the freeze-thaw cycle, the product structure of the present invention is exposed to the ambient temperature or assisted by baking and melting, so that the repairing layer changes direction, and the waterproofing layer is self-repaired, which is cheap and durable; it can avoid the waste caused by the need to renovate the entire waterproofing layer when the waterproofing layer leaks due to minor defects, and can perform self-repair regionally according to the leakage location, avoiding unnecessary work caused by inappropriate query of the leaking point, saving energy and materials, and improving the happiness of people living on the top floor.

Description

Technical Field

[0001] The present invention belongs to the technical field of waterproofing coiled materials, and more specifically, relates to a modified asphalt waterproofing coiled material with a repairing function and a preparation method thereof. Background Art

[0002] As a measure material to protect the main body of building structures, the effective protection of modified asphalt waterproofing materials plays a vital role in the overall appearance of the building.

[0003] At present, the problem of house leakage has always been a "difficult" problem in the field of construction. In the past, the roofs of old-style houses all adopted a "large platform" structure, with a single waterproof treatment, and no corresponding protection treatment was done after the modified asphalt membrane was laid. However, with the passage of time, such houses gradually aged, and a large number of surface carbonization and various cracking problems appeared, which often caused a large amount of accumulated leakage and made it difficult to repair. In recent years, the architectural styles of houses have become more and more diverse and complex after design, and accordingly, the difficulty of waterproofing has continued to rise. In the current maintenance process, the main method used is to remove the old waterproof layer or to re-pave the new waterproof material on the roof of the old waterproof layer for maintenance. The former is very likely to generate a large amount of construction waste, and the latter is only to re-waterproof the old waterproof layer. The gap between the base layer and the old waterproof layer cannot be repaired. If water seepage occurs, it is very easy to form a large area of ​​leakage. Therefore, there is an urgent need for a more effective and reasonable waterproof membrane to maintain the entire structure. Summary of the invention

[0004] The purpose of the present invention is to provide a modified asphalt waterproofing membrane with a repair function and a preparation method thereof. By adding a repair layer on the surface of the waterproofing membrane, the waterproofing membrane product has the function of self-repairing in summer, and can be repaired by auxiliary heating repair in spring and autumn on the basis of protecting the original waterproof layer, so as to achieve self-repair without damaging the original waterproof layer, thereby achieving better waterproof protection of the entire structure by the waterproofing membrane.

[0005] In order to achieve the above object, one aspect of the present invention provides a modified asphalt waterproofing membrane with a repair function, the modified asphalt waterproofing membrane sequentially comprises: an upper surface isolation layer, a repair layer, a waterproof

[0006] Water layer, tread base layer, bonding layer and lower surface isolation layer.

[0007] According to the present invention, preferably, at least one end of the repair layer is further provided with an overlapping waterproof layer, and the overlapping waterproof layer is provided on the waterproof layer;

[0008] The upper surface isolation edge membrane is arranged on the overlapping waterproof layer, and the upper surface isolation edge membrane 0 is connected with the upper surface isolation layer;

[0009] Preferably, the overlapping waterproof layer is made of the same material as the waterproof layer.

[0010] According to the present invention, preferably, the material of the repair layer is a first modified asphalt, and the first modified asphalt comprises, by weight: 80-120 parts of a first asphalt, 10-45 parts of a first softener,

[0011] The first SBS is 5-15 parts, the first modifier is 10-20 parts, the viscosity reducer is 2-6 parts, the auxiliary agent is 0-1 part, the fifth antioxidant is 0.5-4 parts and the first filler is 30-60 parts.

[0012] According to the present invention, preferably, the first asphalt is 300#, 200#, 90#, 70# and 30#

[0013] At least one of petroleum asphalt;

[0014] The first softener is selected from naphthenic oil, second-line engine oil, third-line engine oil and aromatic oil.

[0015] At least one;

[0016] The first modifier is at least one of SBR, C9 hydrogenated petroleum resin and C5 hydrogenated petroleum resin.

[0017] One less;

[0018] The first filler is at least one of light calcium powder, heavy calcium powder, talcum powder and titanium dioxide;

[0019] The first SBS is preferably at least one of Yanhua 4402, Baling Petrochemical 803, LCF3411, Zhongli 3611 and LG501;

[0020] 5. The auxiliary agent is at least one of amino resin, polysiloxane and carbon black;

[0021] The first antioxidant is at least one of nano-TiO2, antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 1035 and magnesium oxide;

[0022] The viscosity reducer is preferably at least one of polyethylene wax, Heilan viscosity reducer FHC, lignin sulfonate and amorphous polyolefin (APAO).

[0023] In the present invention, the preparation method of the first modified asphalt is preferably: the first asphalt, the first softener, the first SBS, the first modifier, the viscosity reducer, the auxiliary agent, the anti-aging agent and the first filler are stirred, heated and blended to obtain the first modified asphalt. The heating temperature is preferably 180-200°C, and the stirring and mixing time is preferably controlled to be 5-6h.

[0024] In the present invention, the repair layer has waterproof ability, but more importantly, it has a repair function; the product has no slippage when tested at 70°C and is in a solid state; it is in a viscous flow state at 80°C and produces slippage; it is in a molten state at ≥90°C; cracks appear in the base waterproof layer due to sedimentation and freeze-thaw cycles. The high temperature in summer can make the repair layer in a viscous flow state for self-repair. The low temperature in spring can make the repair layer in a molten or viscous flow state for self-repair through auxiliary heating.

[0025] According to the present invention, preferably, the material of the waterproof layer is a second modified asphalt, and the second modified asphalt includes, by weight: 100-140 parts of a second asphalt, 0-15 parts of a second softener, 10-30 parts of a second SBS, 10-20 parts of a second modifier, 0-5 parts of a defoaming agent, 0-3 parts of a second antioxidant and 20-40 parts of a second filler.

[0026] According to the present invention, preferably, the second asphalt is at least one of 300#, 200#, 90#, 70# and 30# petroleum asphalt;

[0027] The second softener is selected from at least one of naphthenic oil, second-line oil, third-line oil and aromatic oil;

[0028] The second modifier is at least one of SBR, C9 petroleum resin and C5 petroleum resin;

[0029] The second filler is at least one of light calcium powder, heavy calcium powder, talcum powder and titanium dioxide;

[0030] The defoaming agent is at least one of dimethyl silicone oil, polysiloxane and carbon black;

[0031] The second antioxidant is at least one of nano-TiO2, antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 1035 and magnesium oxide;

[0032] The second SBS is preferably at least one of Yanhua 4402, Baling Petrochemical 803, LCF3411, Zhongli 3611 and LG501.

[0033] In the present invention, the preparation method of the second modified asphalt is preferably: the second asphalt, the second SBS, the second modifier, the defoamer, the second filler and the optional second softener are stirred, heated and blended to obtain the second modified asphalt. The heating temperature is preferably 180-200°C, and the stirring and mixing time is preferably controlled to be 5-6h.

[0034] The repair layer protects the waterproof layer. Due to the protective effect of the repair layer, the waterproof layer is in a relatively closed environment. At the same time, antioxidants are added to the waterproof layer. The product is tested at 80℃ for 240h. The product's low-temperature flexibility test attenuation is ≤2℃, which is ≤5℃ lower than the conventional product attenuation. The UV aging test is tested at 80℃ for 240h. The waterproof layer's low-temperature flexibility test attenuation is 0℃, which is ≤5℃ lower than the conventional product attenuation.

[0035] According to the present invention, preferably, the tire base layer is a reinforced tire base layer, and the material of the reinforced tire base layer is preferably a glass fiber reinforced copper-plated composite polyester tire base;

[0036] The material of the upper surface isolation layer is preferably at least one of shale, river sand, colored sand and PE film.

[0037] In the present invention, the material of the bonding layer is the third modified asphalt, and the third modified asphalt can be any conventional modified asphalt for bonding layers in the art.

[0038] In the present invention, when the material of the upper surface isolation layer is flaky shale, the waterproof roll material product using flaky shale as the isolation material can be exposed for use, forming a scaly inorganic protective layer to reduce the oxidation of the repair layer by ultraviolet rays, and the surface of the waterproof layer cannot be stepped on manually after construction; when the material of the upper surface isolation layer is 20-30 mesh sand, a protective layer needs to be added to the surface of the 20-30 mesh sand isolation material for protection, and the protective layer can be bonded to the repair layer under the action of its own weight, and the protective layer + repair layer + waterproof layer + base layer form a bonded whole, and the protective layer can be stepped on manually after hardening.

[0039] In the present invention, the product uses a reinforced tire base, and the material of the reinforced tire base is preferably a glass fiber reinforced copper-plated composite polyester tire base, and more preferably a reinforced copper-plated composite polyester tire base with glass fiber as a longitudinal reinforcement skeleton. Glass fiber is inserted into the tire base. Since glass fiber has high strength and no elongation, the product is not easily deformed when subjected to external forces after the structure is formed; at the same time, the copper-plated felt with conductive function is woven into the polyester tire base along the longitudinal width of the tire base through a needle-punching weaving method, thereby increasing the conductive heating function while strengthening the stable tire base.

[0040] In the present invention, the waterproof membrane product of the present invention has a tested softening point of ≤125°C, and under standard ambient temperature, the tensile strength is maintained at ≥80% after immersion in water for 14 days, and the tensile strength is maintained at ≥80% after curing in a heat aging box environment at 80°C for 28 days. There is no crack when bent at a low temperature of 25°C, and the product meets the requirements for asphalt membranes in the 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane" standard.

[0041] Another aspect of the present invention provides a method for preparing the modified asphalt waterproofing membrane with repair function, the method comprising:

[0042] (1) preparing modified asphalt for coating a waterproof layer, and then coating the modified asphalt on one side surface of the tread base layer to form the waterproof layer;

[0043] (2) preparing modified asphalt for coating the repair layer, and then coating the modified asphalt on the surface of the waterproof layer to form the repair layer;

[0044] (3) attaching the material of the upper surface isolation layer to the surface of the repair layer to form the upper surface isolation layer;

[0045] (4) preparing modified asphalt for coating a bonding layer, and then coating the modified asphalt on the other side surface of the tire base layer to form the bonding layer;

[0046] (5) The lower surface isolation layer is covered on the adhesive layer.

[0047] According to the present invention, preferably, at least one end of the repair layer is further provided with an overlapping waterproof layer, and the overlapping waterproof layer is provided on the waterproof layer; the upper surface isolation edge membrane is provided on the overlapping waterproof layer, and the upper surface isolation edge membrane is connected to the upper surface isolation layer; the preparation method further comprises:

[0048] In the step (1), the overlapping waterproof layer is applied to the overlapping parts of the waterproof coiled materials of the waterproof layer;

[0049] In the step (2), a repair layer is coated with modified asphalt on the surface of the non-overlapping part of the waterproof membrane of the waterproof layer to form the repair layer, the repair layer is in contact with the overlapping waterproof layer, and the repair layer and the overlapping waterproof layer have the same thickness; finally, the upper surface isolation edge membrane is covered on the overlapping waterproof layer.

[0050] According to the present invention, preferably, the overlapping waterproof layer has a width of 100-120 mm and a thickness of 0.3-0.5 mm;

[0051] The repair layer has a width of 880-900 mm and a thickness of 0.3-0.5 mm.

[0052] In the present invention, the width of the waterproof layer is preferably 1000-1200 mm, and the thickness is preferably 1.2-1.5 mm; the thickness of the waterproof layer after being composited with the repair layer is preferably 1.5 mm-2.0 mm.

[0053] The technical solution of the present invention has the following beneficial effects:

[0054] 1. The waterproofing membrane product of the present invention has a repair layer. Since the viscosity of the repair layer is low and the temperature sensitivity is strong, when the base waterproof layer is damaged by the outside world after the construction is completed or leaks occur due to the freeze-thaw cycle, the product structure of the present invention can be exposed to the sun at ambient temperature or assisted by baking and melting to make the repair layer change direction, so as to self-repair the waterproof layer, which is cheap and durable. It can avoid the waste caused by the need to renovate the entire waterproof layer when the waterproof layer leaks due to minor defects, and can perform self-repair in the region according to the leakage location, avoiding unnecessary work caused by the leakage point that is not suitable for query, saving energy and materials, and improving the happiness of people living on the top floor.

[0055] 2. Compared with common membranes, the repair layer of the present invention has a protective function for the waterproof layer, which is equivalent to sticking a layer of skin on the surface of the waterproof layer, preventing the influence of oxygen on the aging of the waterproof layer. Ultraviolet rays cannot penetrate the repair layer to oxidize the product, effectively avoiding ultraviolet rays and oxygen, two key factors for polymer aging, and greatly improving the life of the waterproof membrane, thereby achieving the same life as the building.

[0056] 3. The product performance of the present invention meets the requirements of the 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane" standard for asphalt membranes. The product is green, environmentally friendly, and more durable.

[0057] 4. The product of the present invention uses shale, sand and other materials as isolation materials. For people who do not often go to the roof structure, shale structure products are preferred, and repair is more convenient and quick; for people who often go to the roof structure, sand surface structure products are preferred. At the same time, a protective layer is added to protect the material. After leakage occurs, it only needs to auxiliary heat the protective layer to achieve repair.

[0058] 5. The present invention uses a reinforced tire base layer to effectively reduce the deformation effect of external forces on the tire base frame, and the product structure is more stable and reliable; the tire base itself has a conductive function, and if leakage occurs, it can be repaired by pre-melting the repair layer through electrical heating.

[0059] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0061] Figure 1 A schematic structural diagram of a modified asphalt waterproof membrane with repair function according to an embodiment of the present invention is shown.

[0062] Figure 2A schematic structural diagram of a glass fiber reinforced copper-plated composite polyester tire base according to an embodiment of the present invention is shown.

[0063] Description of reference numerals:

[0064] 1. Upper surface isolation edge membrane 2. Overlap waterproof layer 3. Waterproof layer 4. Tire base layer 5. Adhesive layer 6. Lower surface isolation layer 7. Repair layer 8. Upper surface isolation layer

[0065] 4.1. Copper-plated felt 4.2. Glass fiber 4.3. Polyester base DETAILED DESCRIPTION

[0066] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0067] The present invention is further described below by examples:

[0068] In the following embodiments: the material of the bonding layer is the third modified asphalt, which includes, by mass, 90 parts of 200# petroleum asphalt, 40 parts of 70# petroleum asphalt, 15 parts of SBS4402, 10 parts of SBR and 30 parts of talcum powder; wherein the SBR is Gaoshi Kegong powdered styrene-butadiene rubber; the SBS4402 is purchased from Yanshan Petrochemical with a brand number of 4402.

[0069] In the following embodiments, the weight of the tire base is 250g; the glass fiber reinforced copper-plated composite polyester tire base (such as Figure 2 ) is prepared as follows:

[0070] Preferably, a copper-plated felt with a thickness of 0.05 mm and a width of 90 mm and a copper ion content of 25±2 g / ㎡ is used as a conductive composite base material; glass fiber is used to composite and fix the copper-plated felt and then evenly spread on a 125g filament polyester cloth with a width of 1010 mm, 7 strips are evenly spread with a distance of 30 mm between each strip, the outermost strip on one side is 40 mm away from the edge of the filament polyester cloth, and the outermost strip on the other side is 160 mm away from the filament polyester cloth; after the uniform spreading is completed, 100g filament polyester cloth is evenly spread on the upper surface, and the composite tire base is obtained after hot needling, dipping and hot rolling.

[0071] In the following examples, the SBS (LCF 3411) used was Huizhou Li Changrong (LCF) 3411; SBS (Yanhua 4402) was purchased from Yanshan Petrochemical, with a grade of 4402; the SBR used was purchased from Gaoshi Kegong Powdered Styrene Butadiene Rubber;

[0072] The particle sizes of the first filler and the second filler used in the following examples are both 200 meshes.

[0073] In the following test examples, the layer structures of the standard samples used are the same as the layer structures and preparation processes of the corresponding embodiments.

[0074] Example 1

[0075] like Figure 1 As shown, this embodiment provides a modified asphalt waterproofing membrane with a repair function, which comprises: an upper surface isolation layer, a repair layer, a waterproof layer, a base layer, a bonding layer and a lower surface isolation layer in sequence; wherein, at least one end of the repair layer is also provided with an overlapping waterproof layer, and the overlapping waterproof layer is provided on the waterproof layer; the overlapping waterproof layer is provided with the upper surface isolation edge membrane, and the upper surface isolation edge membrane is connected to the upper surface isolation layer; the overlapping waterproof layer and the waterproof layer are made of the same material. wherein, the base layer is a reinforced base layer, and the material of the reinforced base layer is a glass fiber reinforced copper-plated composite polyester base; the material of the upper surface isolation layer is a PE film. The material of the upper surface isolation edge membrane is a PE film; the material of the lower surface isolation layer is a PE film.

[0076] The material of the repair layer is the first modified asphalt, which includes, by weight: 105 parts of 90# petroleum asphalt, 40 parts of second-tier engine oil, 10 parts of SBS (LCF 3411), 11 parts of modifier SBR, 5 parts of modifier C9 hydrogenated petroleum resin, 2.7 parts of viscosity reducer polyethylene wax, 0.7 parts of auxiliary carbon black, 2.3 parts of the first antioxidant nano-TiO2 and 45 parts of the first filler heavy calcium powder;

[0077] Among them, the material of the waterproof layer is the second modified asphalt. Calculated by mass, the second modified asphalt includes: 48 parts of 90# petroleum asphalt, 55 parts of 200# petroleum asphalt, 15 parts of three-line engine oil, 15 parts of SBS (Yanhua 4402), 13 parts of SBR, 2.3 parts of defoaming agent dimethyl silicone oil, 1.8 parts of the second antioxidant nano TiO2 and 35 parts of the second filler heavy calcium powder.

[0078] The preparation method of the modified asphalt waterproofing membrane with repair function is as follows:

[0079] (1) Stirring and heating the components contained in the second modified asphalt to obtain a modified asphalt for coating a waterproof layer; the heating temperature is 200°C, and the stirring and mixing time is controlled to be 6 hours. Then the modified asphalt is coated on one side of the tread base layer to form the waterproof layer; the overlapping waterproof layer is coated at the overlapping part of the waterproof roll of the waterproof layer;

[0080] (2) Stirring and heating the components contained in the first modified asphalt to obtain modified asphalt for coating the repair layer; the heating temperature is 180°C, and the stirring and mixing time is controlled to be 6 hours. Then the modified asphalt is coated on the surface of the non-overlapping part of the waterproofing membrane of the waterproof layer to form the repair layer; the repair layer is connected to the overlapping waterproof layer, and the thickness of the repair layer and the overlapping waterproof layer are the same; finally, the upper surface isolation edge membrane is covered on the overlapping waterproof layer;

[0081] (3) attaching the material of the upper surface isolation layer to the surface of the repair layer to form the upper surface isolation layer;

[0082] (4) Stirring and heating the components contained in the third modified asphalt to obtain a modified asphalt for coating a bonding layer; the heating temperature is 180°C, and the stirring and mixing time is controlled to be 6 hours. Then the modified asphalt is coated on the other side surface of the tread base layer to form the bonding layer;

[0083] (5) The lower surface isolation layer is covered on the adhesive layer.

[0084] Among them, the width of the overlapping waterproof layer is 110mm and the thickness is 0.3mm; the width of the repair layer is 890mm and the thickness is 0.3mm; the width of the waterproof layer is 1000mm and the thickness is 1.5mm; the width of the bonding layer is 1000mm and the thickness is 1mm.

[0085] Test Example 1

[0086] The modified asphalt for coating the waterproof layer in Example 1 was used, and the same base as in Example 1 was selected. The base was used as a skeleton to make a standard sample consisting of a waterproof layer and a base layer for testing and analysis. The test was carried out in accordance with the 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane" standard.

[0087] The test results are: the softening point of the modified asphalt used in the waterproof layer is 121℃, there is no slippage in the heat resistance test at 105℃, and there is no cracking at the low temperature of 25℃; at standard ambient temperature, the tensile strength is maintained at ≥80% after 14 days of immersion in water, and the tensile strength is maintained at ≥80% after 28 days of curing in a heat aging box environment at 80℃, and there is no cracking when bending at the low temperature of 25℃.

[0088] Using the modified asphalt used for coating the repair layer in Example 1, the same tire base as in Example 1 was selected, and the tire base was used as a skeleton to make a standard sample consisting of a repair layer and a tire base layer for testing and analysis. The test was conducted with reference to GB18242-2008 "Elastomer Modified Asphalt Waterproofing Membrane" 6.9 High Temperature Performance Test Method to examine the self-repairing ability of the product. The softening point test was conducted with reference to 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane", and the low temperature performance test was conducted with reference to GB18242-2008 "Elastomer Modified Asphalt Waterproofing Membrane". The specific test results are as follows:

[0089] The self-repairing ability test results are: no slippage in the 70℃ high temperature test, slippage in the 80℃ vertical test, slight slippage in the 80℃ 45° angle test; all slippage in the 90℃ 45° angle test, viscous flow state on the surface of the coil at 90℃ (the product liquid phase viscosity test was increased at 90℃, and the viscosity test was 360dpa·s), and the repair layer asphalt produced phase changes at 70℃-90℃, which has excellent self-repairing ability;

[0090] At the same time, the softening point performance of the product is specially tested in accordance with the above standards. The typical softening point test value is 82°C; it meets the 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane" ≤125°C requirement; the low temperature performance -25°C test shows no cracks, meeting the GB18242-2008 "Elastomer Modified Asphalt Waterproof Membrane" II product requirements.

[0091] The modified asphalt for coating the repair layer and the modified asphalt for the waterproof layer in Example 1 were used, and the same base as in Example 1 was selected. The base was used as a skeleton to make a standard sample consisting of a repair layer, a waterproof layer and a base layer according to the product structure. The antioxidant performance test was carried out with reference to the artificial accelerated aging test requirements of GB18242-2008 "Elastomer modified asphalt waterproof membrane", and the repair test analysis was carried out with reference to the nail rod watertightness test method of GB 23441-2009 "Self-adhesive polymer modified asphalt waterproof membrane".

[0092] The test results are: after 30 days of artificial accelerated aging with a xenon arc lamp of 1500MJ / ㎡, there is no slippage in the heat resistance test at 105℃; the tensile strength is maintained at 88%, and there is no crack when bent at a low temperature of 25℃;

[0093] The samples were prepared according to the nail rod water tightness test method of GB 23441-2009 "Self-adhesive polymer modified bitumen waterproof membrane". After being heated in a 90°C heat aging box for 6 hours, they were cooled to room temperature for a nail rod water tightness test. Nails were used to penetrate the membrane to achieve self-repair without water seepage.

[0094] Example 2

[0095] The difference between this embodiment and embodiment 1 is only the material of the repair layer, which is as follows:

[0096] The material of the repair layer is a first modified asphalt, which includes, by mass, 75 parts of 70# petroleum asphalt, 45 parts of 200# petroleum asphalt, 20 parts of three-line engine oil, 8.5 parts of SBS4402, 8 parts of modifier SBR, 8 parts of modifier C9 hydrogenated petroleum resin, 3.3 parts of viscosity reducer polyethylene wax, 1 part of auxiliary carbon black, 3.5 parts of first antioxidant nano-TiO2 and 55 parts of first filler talc;

[0097] The preparation method of this embodiment is the same as that of embodiment 1.

[0098] Test Example 2

[0099] Using the modified asphalt used for coating the repair layer in Example 2, the same tire base as in Example 2 was selected, and the tire base was used as a skeleton to make a standard sample consisting of a repair layer and a tire base layer for testing and analysis. The test was conducted with reference to GB18242-2008 "Elastomer Modified Asphalt Waterproofing Membrane" 6.9 High Temperature Performance Test Method to examine the self-repairing ability of the product. The softening point test was conducted with reference to 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane", and the ground stability performance test was conducted with reference to GB18242-2008 "Elastomer Modified Asphalt Waterproofing Membrane". The specific test results are as follows:

[0100] The self-repairing ability test results are: no slippage in the 70℃ high temperature test, slippage in the 80℃ vertical test, partial slippage in the 80℃ 45° angle test, all slippage in the 90℃ 45° angle test, viscous flow state in the 90℃ coil surface (the product liquid phase viscosity test was increased at 90℃, and the viscosity test was 310dpa·s), and the repair layer asphalt produced phase changes at 70℃-90℃, which has excellent self-repairing ability;

[0101] At the same time, the softening point performance of the product is specially tested in accordance with the above standards. The typical softening point test value is 78°C; it meets the 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane" ≤125°C requirement; the ground stability performance is tested at -25°C without cracks, meeting the GB18242-2008 "Elastomer Modified Asphalt Waterproof Membrane" II product requirements.

[0102] The modified asphalt for coating the repair layer and the modified asphalt for the waterproof layer in Example 2 were used, and the same base as in Example 2 was selected. The base was used as a skeleton to make a standard sample consisting of a repair layer, a waterproof layer and a base layer according to the product structure. The antioxidant performance test was carried out with reference to the artificial accelerated aging test requirements of GB18242-2008 "Elastomer modified asphalt waterproof membrane", and the repair test analysis was carried out with reference to the nail rod watertightness test method of GB 23441-2009 "Self-adhesive polymer modified asphalt waterproof membrane".

[0103] The test results are: after 30 days of artificial accelerated aging with a xenon arc lamp of 1500MJ / ㎡, there is no slippage in the heat resistance test at 105℃; the tensile strength is maintained at 87%, and there is no crack when bent at a low temperature of 25℃;

[0104] The samples were prepared according to the nail rod water tightness test method of GB 23441-2009 "Self-adhesive polymer modified bitumen waterproof membrane". After being heated in a 90°C heat aging box for 6 hours, they were cooled to room temperature for the nail rod water tightness test. The membrane was penetrated with nails to achieve self-repair without water seepage.

[0105] Example 3

[0106] The difference between this embodiment and embodiment 1 is only the material of the waterproof layer, which is as follows:

[0107] The material of the waterproof layer is the second modified asphalt, which includes, by mass: 50 parts of 90# petroleum asphalt, 65 parts of 200# petroleum asphalt, 19 parts of SBS (Yanhua 4402), 10 parts of SBR, 1.8 parts of defoaming agent dimethyl silicone oil, 0.6 parts of antioxidant nano-TiO2 and 35 parts of second filler heavy calcium powder.

[0108] The preparation method of this embodiment is the same as that of embodiment 1.

[0109] Test Example 3

[0110] The modified asphalt for coating the waterproof layer in Example 3 was used, and the same base as in Example 3 was selected. The base was used as a skeleton to make a standard sample consisting of a waterproof layer and a base layer for testing and analysis. The test was carried out in accordance with the 10038-2019 "Green Building Materials Evaluation-Waterproof Membrane" standard.

[0111] The test results are as follows: the softening point of the modified asphalt used in the waterproof layer is 115℃, there is no slippage in the heat resistance test at 105℃, and there is no cracking at the low temperature of 25℃; at standard ambient temperature, the tensile strength is maintained at 85% after 14 days of immersion in water, and at 83% after 28 days of curing in a heat aging box at 80℃, and there is no cracking when bending at the low temperature of 25℃.

[0112] The modified asphalt for coating the repair layer and the modified asphalt for the waterproof layer in Example 3 were used, and the same base as in Example 3 was selected. The base was used as a skeleton to make a standard sample consisting of a repair layer, a waterproof layer and a base layer according to the product structure. The antioxidant performance test was carried out with reference to the artificial accelerated aging test requirements of GB18242-2008 "Elastomer modified asphalt waterproof membrane", and the repair test analysis was carried out with reference to the nail rod watertightness test method of GB 23441-2009 "Self-adhesive polymer modified asphalt waterproof membrane".

[0113] The test results are: after 30 days of artificial accelerated aging with a xenon arc lamp of 1500MJ / ㎡, there is no slippage in the heat resistance test at 105℃; the tensile strength is maintained at 83%, and there is no crack when bent at a low temperature of 25℃;

[0114] The samples were prepared according to the nail rod water tightness test method of GB 23441-2009 "Self-adhesive polymer modified bitumen waterproof membrane". After being heated in a 90°C heat aging box for 6 hours, they were cooled to room temperature for a nail rod water tightness test. Nails were used to penetrate the membrane to achieve self-repair without water seepage.

[0115] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A modified asphalt waterproofing membrane with repair function, characterized in that: The modified asphalt waterproofing membrane comprises in sequence: an upper surface isolation layer, a repair layer, a waterproof layer, a base layer, a bonding layer and a lower surface isolation layer; The material of the repair layer is the first modified asphalt, which includes, by weight: 80-120 parts of the first asphalt, 10-45 parts of the first softener, 5-15 parts of the first SBS, 10-20 parts of the first modifier, 2-6 parts of the viscosity reducer, 0-1 part of the auxiliary agent, 0.5-4 parts of the first antioxidant and 30-60 parts of the first filler; The material of the waterproof layer is a second modified asphalt, which includes, by weight: 100-140 parts of a second asphalt, 0-15 parts of a second softener, 10-30 parts of a second SBS, 10-20 parts of a second modifier, 0-5 parts of a defoaming agent, 0-3 parts of a second antioxidant and 20-40 parts of a second filler.

2. The modified asphalt waterproofing membrane according to claim 1, wherein: At least one end of the repair layer is further provided with an overlapping waterproof layer, and the overlapping waterproof layer is provided on the waterproof layer; An upper surface isolation edge membrane is arranged on the overlapping waterproof layer, and the upper surface isolation edge membrane is connected to the upper surface isolation layer.

3. The modified asphalt waterproofing membrane according to claim 2, wherein: The overlapping waterproof layer is made of the same material as the waterproof layer.

4. The modified asphalt waterproofing membrane according to claim 1, wherein: The first asphalt is at least one of 300#, 200#, 90#, 70# and 30# petroleum asphalt; The first softener is selected from at least one of naphthenic oil, second-line oil, third-line oil and aromatic oil; The first modifier is at least one of SBR, C9 hydrogenated petroleum resin and C5 hydrogenated petroleum resin; The first filler is at least one of light calcium powder, heavy calcium powder, talcum powder and titanium dioxide; The auxiliary agent is at least one of amino resin, polysiloxane and carbon black; The first antioxidant is at least one of nano-TiO2, antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 1035 and magnesium oxide.

5. The modified asphalt waterproofing membrane according to claim 1, wherein: The first SBS is at least one of Yanhua 4402, Baling Petrochemical 803, LCF3411, Zhongli 3611 and LG501.

6. The modified asphalt waterproofing membrane according to claim 1, wherein: The viscosity reducer is at least one of polyethylene wax, Heilan viscosity reducer FHC, lignin sulfonate and amorphous polyolefin.

7. The modified asphalt waterproofing membrane according to claim 1, wherein: The second asphalt is at least one of 300#, 200#, 90#, 70# and 30# petroleum asphalt; The second softener is selected from at least one of naphthenic oil, second-line oil, third-line oil and aromatic oil; The second modifier is at least one of SBR, C9 petroleum resin and C5 petroleum resin; The second filler is at least one of light calcium powder, heavy calcium powder, talcum powder and titanium dioxide; The defoaming agent is at least one of dimethyl silicone oil, polysiloxane and carbon black; The second antioxidant is at least one of nano-TiO2, antioxidant 1010, antioxidant 168, antioxidant 1076, antioxidant 1035 and magnesium oxide.

8. The modified asphalt waterproofing membrane according to claim 1, wherein: The second SBS is at least one of Yanhua 4402, Baling Petrochemical 803, LCF3411, Zhongli 3611 and LG501.

9. The modified asphalt waterproofing membrane according to claim 1, wherein: The tread base layer is a reinforced tread base layer.

10. The modified asphalt waterproofing membrane according to claim 9, wherein: The material of the reinforced tire base layer is a glass fiber reinforced copper-plated composite polyester tire base.

11. The modified asphalt waterproofing membrane according to claim 1, wherein: The material of the upper surface isolation layer is at least one of shale, river sand, colored sand and PE film.

12. The method for preparing the modified asphalt waterproofing membrane with repair function according to any one of claims 1 to 11, characterized in that: The preparation method comprises: (1) preparing modified asphalt for coating a waterproof layer, and then coating the modified asphalt on one side surface of the tread base layer to form the waterproof layer; (2) preparing modified asphalt for coating the repair layer, and then coating the modified asphalt on the surface of the waterproof layer to form the repair layer; (3) attaching the material of the upper surface isolation layer to the surface of the repair layer to form the upper surface isolation layer; (4) preparing modified asphalt for coating a bonding layer, and then coating the modified asphalt on the other side surface of the tread base layer to form the bonding layer; (5) The lower surface isolation layer is covered on the adhesive layer.

13. The preparation method according to claim 12, wherein: At least one end of the repair layer is further provided with an overlapping waterproof layer, and the overlapping waterproof layer is provided on the waterproof layer; an upper surface isolation edge membrane is provided on the overlapping waterproof layer, and the upper surface isolation edge membrane is connected to the upper surface isolation layer; the preparation method further includes: In the step (1), the overlapping waterproof layer is applied to the overlapping parts of the waterproof roll material of the waterproof layer; In the step (2), a modified asphalt coating repair layer is applied to the surface of the non-overlapping portion of the waterproof membrane of the waterproof layer to form the repair layer, the repair layer is in contact with the overlapping waterproof layer, and the repair layer and the overlapping waterproof layer have the same thickness; finally, the upper surface isolation edge membrane is covered on the overlapping waterproof layer.

14. The preparation method according to claim 13, wherein: The overlapping waterproof layer has a width of 100-120 mm and a thickness of 0.3-0.5 mm; The repair layer has a width of 880-900 mm and a thickness of 0.3-0.5 mm.

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