Polymer bitumen waterproof coating laminated waterproof system, Wet construction method and application

Abstract

The application discloses a polymer asphalt waterproof coating laminated waterproof system, a wet-paving construction method and application. The laminated waterproof system is a waterproof system composed of polymer asphalt waterproof coating and self-adhesive modified asphalt waterproof coiled material bonding, the polymer asphalt waterproof coating is once thickly coated on the surface of a base layer, and the self-adhesive modified asphalt waterproof coiled material is laid on the surface of the wet coating. The application has higher construction efficiency than common asphalt coating and self-adhesive waterproof coiled material composite waterproof layer, lower-temperature construction than non-solidified and coiled material composite waterproof layer, and one more waterproof layer than the wet-paving process. Meanwhile, the two waterproof layers of the application and the base layer are fully bonded to form a full-interface closed mortise and tenon sealing structure, and the water channeling resistance is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waterproof coating, in particular to a polymer asphalt waterproof coating laminated waterproof system, wet laying construction method and application. BACKGROUND

[0002] In the current waterproof engineering, the waterproof layer composed of coating and roll material is widely used, which takes into account the advantages of both coating and roll material, has the effect of repairing and sealing the cracks and capillary pores of the base layer, and forms a two-way waterproof system with full adhesion to the base layer. The composite waterproof layer of asphalt coating and self-adhesive modified asphalt waterproof roll material using cold construction technology is safe and environmentally friendly, but it needs to wait for the asphalt coating to form a film before laying the roll material, and the asphalt coating needs to be applied multiple times, which takes a long time to dry and seriously affects the construction efficiency. The wet laying technology uses cement paste as the bonding layer, and lays the self-adhesive modified asphalt waterproof roll material on its surface, which has high construction efficiency but is only a single waterproof layer. The type and grade of cement paste are difficult to match with the base layer, and the drying process is greatly affected by environmental and construction factors, which may cause cracking and separation from the base layer, and the lap joint edge of the roll material is easily contaminated by the cement paste and cannot be sealed, which may eventually cause water leakage. The composite waterproof layer of non-solidified rubber asphalt waterproof coating and roll material using hot construction technology can be efficiently constructed, but it needs to heat the coating in advance, which consumes time and energy, produces harmful smoke during heating and construction, and there is a risk of scalding if the construction personnel are careless. Therefore, a new type of cold construction waterproof system with efficient construction and reliable waterproof performance will be a technological innovation. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a polymer asphalt waterproof coating laminated waterproof system, a wet laying construction method and application.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A polymer asphalt waterproof coating laminated waterproof system is a waterproof system composed of polymer asphalt waterproof coating and self-adhesive modified asphalt waterproof roll material, characterized in that the polymer asphalt waterproof coating is prepared by mixing and stirring liquid material and powder material, the liquid material contains polymer emulsion and emulsified asphalt, the powder material includes active filler, and the polymer asphalt waterproof coating laminated waterproof system is to apply the polymer asphalt waterproof coating to the surface of the base layer once, and then lay the self-adhesive modified asphalt waterproof roll material on the surface of the wet coating.

[0006] The wet coating in the present application is a coating that is not completely dried, that is, the coating before the actual drying or before the drying into a film falls into the category of wet coating. Among them, whether the coating is completely dried can be determined according to the test index of the actual drying time in GB / T1728-2020 Paint Film, Putty Film Drying Time Determination Method. According to the standard, the coating is generally dried for 4-10 hours according to the change of temperature and humidity of the environment.

[0007] The lamination in the present application is cold bonding, which means that the self-adhesive modified asphalt waterproof coiled material is laid on the surface of the wet coating.

[0008] The thickness of the first thick coating in the present application can be the conventional construction thickness in the art, preferably 0.5-4.5mm.

[0009] The polymer emulsion in the present application is at least one of styrene-butadiene emulsion, acrylic emulsion or modified polymer emulsion of any one of the two.

[0010] The preparation method of the modified polymer emulsion in the present application comprises the following steps:

[0011] S1, heating the styrene-butadiene emulsion and / or the acrylic emulsion under a nitrogen atmosphere, stirring to obtain a polymer emulsion 1;

[0012] S2, under the condition of stirring, adding an epoxy silane pre-dispersion liquid to the polymer emulsion 1 obtained in step S1, after the addition is completed, continuing to stir for 30-60min to obtain a modified polymer emulsion.

[0013] Preferably, the stirring condition in step S1 is that the stirring speed is 200-400rpm and the stirring temperature is 40-60℃.

[0014] Preferably, the preparation method of the epoxy silane pre-dispersion liquid in step S2 is that water is added dropwise to the epoxy silane, and ultrasonic dispersion is carried out for 10-30min to obtain the epoxy silane dispersion liquid.

[0015] Further preferably, the epoxy silane is one or several of trimethoxyl or triethoxyl capped epoxy silane.

[0016] Further preferably, the mass percentage of water in the epoxy silane dispersion liquid is 1-10%.

[0017] Further preferably, the addition amount of the epoxy silane is 0.1-10% of the mass of the polymer emulsion in step S1; more preferably 0.28-9.5%.

[0018] Preferably, the stirring speed in step S2 is 400-600rpm.

[0019] The emulsified asphalt in the present application is at least one of cationic emulsified asphalt, anionic emulsified asphalt and nonionic emulsified asphalt.

[0020] The active filler in the present application is at least one of Portland cement, ordinary Portland cement, slag Portland cement, pozzolanic Portland cement, fly ash Portland cement and composite Portland cement.

[0021] Preferably, the mass ratio of the liquid material and the powder material of the polymer asphalt waterproof coating in the present application is 1:0.5-5.

[0022] The liquid material of the polymer asphalt waterproof coating in the present application can further include at least one of wetting dispersant, thickening agent and defoaming agent.

[0023] Preferably, the wetting dispersant is at least one of polycarboxylic acid sodium salt type wetting dispersant, polyacrylic acid sodium salt type wetting dispersant and nonionic surfactant type wetting dispersant.

[0024] Preferably, the thickening agent is at least one of cellulose ether type thickening agent, associated type thickening agent and alkali swelling type thickening agent.

[0025] Preferably, the defoaming agent is at least one of polyether defoaming agent, silicone defoaming agent and mineral oil defoaming agent.

[0026] The powder material of the polymer asphalt waterproof coating in the present application can further include filler.

[0027] Preferably, the filler is at least one of calcium carbonate, barium sulfate, titanium dioxide, quartz powder, talc powder and bentonite.

[0028] Further preferably, the polymer asphalt waterproof coating in the present application is composed of the following components: the liquid material including, in terms of 100% mass percentage, 20-80% of polymer emulsion, 20-80% of emulsified asphalt, 0.1-1.0% of wetting dispersant, 0.1-1.0% of thickening agent and 0.1-1.0% of defoaming agent; and the powder material including, in terms of 100% mass percentage, 20-80wt% of active filler and 80-20wt% of filler.

[0029] The preparation method of the polymer asphalt waterproof coating in the present application is as follows: 10-20wt% of the powder material is added into the liquid material, stirring at 600-1000rpm for 5-10min, the remaining amount of the powder material is added, and the stirring is continued for 10-20min.

[0030] The preparation method of the liquid material includes the following steps:

[0031] L1, under the condition of stirring at 400-600 rpm, the formula amount of emulsified asphalt is added into the formula amount of wetting dispersant and defoaming agent to obtain an intermediate liquid material;

[0032] L2, the formula amount of modified polymer emulsion is added into the intermediate liquid material obtained in step (1) in 3-5 times, and stirring is continued at 400-600 rpm for 10-30 min, then the formula amount of thickening agent is added, and stirring is carried out at 600-1000 rpm for 30-60 min, to obtain the liquid material.

[0033] The preparation method of the powder material is as follows: the formula amount of active filler and filler is stirred and mixed, the stirring speed is 300-600 rpm, and the stirring time is 10-30 min.

[0034] The application further provides a wet laying construction method of the polymer asphalt waterproof coating lamination waterproof system.

[0035] (1) forming a wet coating layer on the surface of the base layer by using the polymer asphalt waterproof coating;

[0036] (2) directly laying the self-adhesive modified asphalt waterproof roll material on the surface of the wet coating layer obtained in step (1), performing air exhaust treatment and ensuring full adhesion, to obtain the polymer asphalt waterproof coating lamination waterproof system.

[0037] Preferably, the construction method of the wet coating layer in step (1) comprises spraying, rolling or scraping.

[0038] The application further provides an application of the composite waterproof layer or the polymer asphalt waterproof coating lamination waterproof system prepared by using the wet laying construction method in waterproof engineering.

[0039] The application has the following beneficial effects:

[0040] (1) the polymer asphalt waterproof coating of the polymer asphalt waterproof coating lamination waterproof system can be constructed on the surface of the base layer by using the cold construction (spraying, rolling or scraping) method, thick coating construction is formed at one time, then the self-adhesive modified asphalt waterproof roll material is laid on the surface of the wet coating, the construction efficiency of the composite waterproof layer of the ordinary asphalt coating and the self-adhesive waterproof roll material is higher, the low-temperature construction of the composite waterproof layer of the non-solidified and the roll material is lower, and one waterproof layer is added in the wet laying process.

[0041] (2) the polymer asphalt waterproof coating is constructed on the surface of the base layer by using the cold construction (spraying, rolling or scraping) method and has the permeability, two waterproof layers can be obtained by using the bidirectional interlayer bonding mode of the base layer and the self-adhesive modified asphalt waterproof roll material, the two waterproof layers of the application and the base layer are fully adhered to form a full-interface closed mortise and tenon sealing structure, and the water channeling resistance is better.

[0042] (3) The epoxy silane pre-dispersion prepared by the present application unexpectedly reacts more fully with the polymer emulsion after hydrolysis of part of the siloxane groups, and the two react through ring opening of the epoxy groups, thus obtaining a modified polymer emulsion asphalt coating with more excellent performance and higher peel strength and water immersion peel strength retention after being combined with a roll material.

[0043] (4) The polymer asphalt waterproof coating of the present application unexpectedly has more excellent performance and faster drying speed and higher water immersion peel strength retention after being combined with a roll material, and the hydrolyzed silane groups in the liquid material are fully connected with the powder material through the hydroxyl groups, which plays a beneficial role. DETAILED DESCRIPTION

[0044] The advantages and effects of the present application can be easily understood by those skilled in the art from the description of the present application. The present application can also be implemented or applied in other different specific embodiments, and the details in the description can be modified or changed based on different views and applications without departing from the spirit of the present application.

[0045] Before further describing the specific embodiments of the present application, it should be understood that the scope of protection of the present application is not limited to the following specific embodiments; it should also be understood that the terms used in the embodiments of the present application are for the purpose of describing the specific embodiments, and are not intended to limit the scope of protection of the present application.

[0046] When the embodiments give numerical ranges, it should be understood that, unless otherwise specified by the present application, both endpoints of each numerical range and any number between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0047] The present application does not limit the source of the raw materials used, and unless otherwise specified, the raw materials used in the present application are all commercially available in the technical field. The polymer asphalt waterproof coating used in the embodiments 1-3 of the present application can be replaced by the waterproof coating of JBA-260 polymer asphalt thick coating waterproof coating produced by Beijing Oriental Yuhong Waterproof Technology Co., Ltd., which will not have a different impact on the technical effects of the present application.

[0048] Embodiment 1

[0049] Preparation of modified polymer emulsion: (1) 196 g of styrene-butadiene emulsion was loaded into a reaction vessel, the air in the reaction vessel was replaced with nitrogen, the reaction vessel was kept sealed and no air entered, and nitrogen was slowly introduced to ensure that the reaction vessel was filled with nitrogen; (2) the reaction vessel was heated, the stirring speed was controlled at 250 rpm, and the temperature of the polymer emulsion was controlled at 50°C; (3) 4 g of epoxy silane was slowly added with 5 wt% of water, and immediately ultrasonic dispersion was performed for 25 min to obtain an epoxy silane pre-dispersion; (4) the stirring speed was increased to 600 rpm, the epoxy silane pre-dispersion was slowly added to the reaction vessel through a constant pressure funnel, and after the addition was completed, the stirring was continued for 35 min.

[0050] Preparation of liquid material of polymer asphalt waterproof coating: (1) 300 g of anionic emulsified asphalt was added to a stirring tank, and the stirring speed was controlled at 500 rpm; (2) 1.5 g of polyacrylic acid sodium salt wetting dispersant, 1 g of mineral oil defoaming agent and 1 g of silicone defoaming agent were added; (3) the modified polymer emulsion was added to the stirring tank in three batches, and after the addition was completed, the stirring was continued for 15 min; (4) 0.9 g of cellulose ether thickening agent and 0.6 g of alkali swelling thickening agent were slowly added, the stirring speed was increased to 800 rpm, and the stirring time was 40 min.

[0051] Preparation of powder material of polymer asphalt waterproof coating: 200 g of ordinary Portland cement, 150 g of barium sulfate, 100 g of quartz powder and 50 g of talc powder were mixed in a stirring tank, the stirring speed was 300 rpm, and the stirring time was 25 min.

[0052] Construction method of polymer asphalt waterproof coating and self-adhesive waterproof coiled material laminated waterproof system: (1) 78 g of powder was poured into the liquid material, and high-speed stirring was started for mixing, the stirring speed was 900 rpm, and the stirring time was 6 min; (2) the remaining 422 g of powder was poured in, and high-speed stirring was continued for 17 min; (3) the mixed polymer asphalt waterproof coating was immediately applied on the surface of the base layer by rolling, and then the self-adhesive modified asphalt waterproof coiled material was directly laid on the surface of the wet coating and was subjected to exhaust treatment, and two waterproof layers were obtained after the coating was dried.

[0053] Example 2

[0054] Preparation of modified polymer emulsion: (1) 100 g of styrene-butadiene emulsion and 220 g of acrylic emulsion were loaded into a reaction vessel, the air in the reaction vessel was replaced with nitrogen, the reaction vessel was kept sealed and air-free, and nitrogen was slowly introduced to ensure that the reaction vessel was filled with nitrogen; (2) the reaction vessel was heated, the stirring speed was controlled at 360 rpm, and the temperature of the polymer emulsion was controlled at 55°C; (3) 3wt% water was slowly added to 30 g of epoxy silane, and ultrasonic dispersion was immediately performed for 20 min to obtain an epoxy silane pre-dispersion; (4) the stirring speed was increased to 500 rpm, the epoxy silane pre-dispersion was slowly added to the reaction vessel through a constant pressure funnel, and stirring was continued for 40 min after the addition was completed.

[0055] Preparation of liquid material of polymer asphalt waterproof coating: (1) 150 g of non-ionic emulsified asphalt was added to a stirring tank, and the stirring speed was controlled at 470 rpm; (2) 1.2 g of sodium salt type polycarboxylic acid wetting dispersant, 0.8 g of non-ionic surfactant wetting dispersant, and 1.5 g of polyether defoaming agent were added; (3) the modified polymer emulsion was added to the stirring tank in five batches, and stirring was continued for 10-30 min after the addition was completed; (4) 0.8 g of associative thickener was slowly added, the stirring speed was increased to 900 rpm, and stirring was continued for 46 min.

[0056] Preparation of powder material of polymer asphalt waterproof coating: 110 g of composite portland cement, 40 g of slag portland cement, 330 g of calcium carbonate, 200 g of titanium dioxide, and 20 g of bentonite were mixed in a stirring tank at a stirring speed of 400 rpm for 19 min.

[0057] Construction method of polymer asphalt waterproof coating and self-adhesive waterproof coiled material laminated waterproof system: (1) 100 g of powder was poured into the liquid material, and high-speed stirring was started for mixing, the stirring speed was 860 rpm, and the stirring time was 8 min; (2) the remaining 600 g of powder was poured in, and high-speed stirring was continued for 20 min; (3) the mixed polymer asphalt waterproof coating was immediately applied on the surface of the base layer by the method of blade coating, and then the self-adhesive modified asphalt waterproof coiled material was directly laid on the surface of the wet coating and was subjected to exhaust treatment, and two waterproof layers were obtained after the coating was dried.

[0058] Example 3

[0059] Preparation of modified polymer emulsion: (1) 104.7 g of acrylic emulsion was loaded into a reaction vessel, the reaction vessel was replaced with nitrogen to replace the air in the reaction vessel, the reaction vessel was kept sealed and no air entered, and nitrogen was slowly introduced to ensure that the reaction vessel was filled with nitrogen; (2) the reaction vessel was heated, the stirring speed was controlled at 280 rpm, and the temperature of the polymer emulsion was controlled at 45°C; (3) 0.3 g of epoxy silane was slowly added with 8 wt% water, and immediately ultrasonic dispersion was carried out for 14 min to obtain an epoxy silane pre-dispersion; (4) the stirring speed was increased to 550 rpm, the epoxy silane pre-dispersion was slowly added into the reaction vessel through a constant pressure funnel, and after the addition was completed, the stirring was continued for 39 min.

[0060] Preparation of liquid material of polymer asphalt waterproof coating: (1) 295 g of anionic emulsified asphalt and 100 g of non-ionic emulsified asphalt were added into a stirring tank, and the stirring speed was controlled at 500 rpm; (2) 1 g of sodium salt type wetting dispersant and 2.5 g of mineral oil defoaming agent were added; (3) the modified polymer emulsion was added into the stirring tank in three batches, and after the addition was completed, the stirring was continued for 18 min; (4) 1 g of alkali swelling type thickening agent and 0.5 g of associated type thickening agent were slowly added, the stirring speed was increased to 700 rpm, and the stirring time was 50 min.

[0061] Preparation of powder material of polymer asphalt waterproof coating: 120 g of composite portland cement, 100 g of fly ash portland cement and 80 g of barium sulfate were mixed in a stirring tank, the stirring speed was 360 rpm, and the stirring time was 15 min.

[0062] Construction method of polymer asphalt waterproof coating and self-adhesive waterproof coiled material layering waterproof system: (1) when in use, 60 g of powder was poured into the liquid material, and high-speed stirring was started for mixing, the stirring speed was 700 rpm, and the stirring time was 8 min; (2) the remaining 240 g of powder was poured, and high-speed stirring was continued for 15 min; (3) the mixed polymer asphalt waterproof coating was immediately applied on the surface of the base layer by spraying, and then the self-adhesive modified asphalt waterproof coiled material was directly laid on the surface of the wet coating film and was subjected to exhaust treatment, and two waterproof layers were obtained after the coating was dried.

[0063] Comparative example 1

[0064] Preparation of liquid material of polymer asphalt waterproof coating: (1) 300 g of anionic emulsified asphalt was added into a stirring tank, and the stirring speed was controlled at 500 rpm; (2) 1.5 g of sodium salt type wetting dispersant, 1 g of mineral oil defoaming agent and 1 g of silicone defoaming agent were added; (3) 200 g of butyl benzene emulsion was added into the stirring tank, and after the addition was completed, the stirring was continued for 15 min; (4) 0.9 g of cellulose ether type thickening agent and 0.6 g of alkali swelling type thickening agent were slowly added, the stirring speed was increased to 800 rpm, and the stirring time was 40 min.

[0065] Preparation of powder of polymer modified asphalt waterproof coating: 200 g of ordinary Portland cement, 150 g of barium sulfate, 100 g of quartz powder, 50 g of talc powder were mixed in a stirring tank, stirring speed 300 rpm, stirring time 25 min.

[0066] Construction method of waterproof system of polymer modified asphalt waterproof coating and self-adhesive waterproof roll material: (1) 78 g of powder was poured into the liquid material, and mixing was carried out by starting high-speed stirring, stirring speed 900 rpm, stirring time 6 min; (2) pour the remaining 422 g of powder, continue high-speed stirring for 17 min; (3) the mixed polymer modified asphalt waterproof coating is immediately applied on the surface of the base layer by rolling, then the self-adhesive modified asphalt waterproof roll material is directly laid on the surface of the wet coating film and exhaust treatment is carried out, and two waterproof layers are obtained after the coating is dried.

[0067] Comparative example 2

[0068] Preparation of modified polymer emulsion: (1) 196 g of butyl rubber emulsion was loaded into a reaction vessel, nitrogen was used to replace the air in the reaction vessel, the reaction vessel was kept sealed and no air entered, and nitrogen was slowly introduced to ensure that the reaction vessel was filled with nitrogen; (2) heat the reaction vessel, control the stirring speed at 250 rpm, and control the temperature of the polymer emulsion at 50°C; (3) increase the stirring speed to 600 rpm, slowly drop 4 g of epoxy silane into the reaction vessel through a constant pressure funnel, and continue stirring for 35 min after dropping.

[0069] Preparation of liquid material of polymer modified asphalt waterproof coating: (1) 300 g of anionic emulsified asphalt was added to the stirring tank, and the stirring speed was controlled at 500 rpm; (2) add 1.5 g of polyacrylic acid sodium salt wetting dispersant, 1 g of mineral oil defoaming agent and 1 g of silicone defoaming agent; (3) add the modified polymer emulsion in 3 batches into the stirring tank, and continue stirring for 15 min after adding; (4) slowly add 0.9 g of cellulose ether thickening agent and 0.6 g of alkali swelling thickening agent, and increase the stirring speed to 800 rpm, stirring time 40 min.

[0070] Preparation of powder of polymer modified asphalt waterproof coating: 200 g of ordinary Portland cement, 150 g of barium sulfate, 100 g of quartz powder, 50 g of talc powder were mixed in a stirring tank, stirring speed 300 rpm, stirring time 25 min.

[0071] The construction method of the waterproof system of the polymer asphalt waterproof coating and the self-adhesive waterproof roll material is as follows: (1) pour 78 g of the powder into the liquid, start high-speed stirring for mixing, the stirring speed is 900 rpm, and the stirring time is 6 min; (2) pour the remaining 422 g of the powder, and continue high-speed stirring for 17 min; (3) immediately roll the mixed polymer asphalt waterproof coating on the surface of the base layer, then directly lay the self-adhesive modified asphalt waterproof roll material on the surface of the wet coating film and perform exhaust treatment, and the two waterproof layers are obtained after the coating is dried.

[0072] Comparative example 3

[0073] Preparation of the modified polymer emulsion: (1) 196 g of the butylphenyl emulsion is loaded into a reaction container, nitrogen is used to replace the air in the reaction container, the reaction container is kept sealed and air is prevented from entering, and nitrogen is slowly introduced to ensure that the reaction container is filled with nitrogen; (2) the reaction container is heated, the stirring speed is controlled to be 250 rpm, and the temperature of the polymer emulsion is controlled to be 50 DEG C; (3) 5wt% of water is slowly added to 4 g of the epoxy silane, and ultrasonic dispersion is immediately performed for 25 min to obtain an epoxy silane pre-dispersion liquid; (4) the stirring speed is increased to 600 rpm, the epoxy silane pre-dispersion liquid is slowly added to the reaction container through a constant pressure funnel, and stirring is continued for 35 min after the addition is completed.

[0074] Preparation of the liquid of the polymer asphalt waterproof coating: (1) 300 g of the anionic emulsified asphalt is added to a stirring tank, and the stirring speed is controlled to be 500 rpm; (2) 1.5 g of the polyacrylic acid sodium salt wetting dispersant, 1 g of the mineral oil defoaming agent and 1 g of the organic silicon defoaming agent are added; (3) the modified polymer emulsion is added to the stirring tank in three batches, and stirring is continued for 15 min after the addition is completed; (4) 0.9 g of the cellulose ether thickening agent and 0.6 g of the alkali swelling thickening agent are slowly added, the stirring speed is increased to 800 rpm, and the stirring time is 40 min.

[0075] Preparation of the powder of the polymer asphalt waterproof coating: 200 g of ordinary Portland cement, 150 g of barium sulfate, 100 g of quartz powder and 50 g of talc powder are mixed in a stirring tank, the stirring speed is 300 rpm, and the stirring time is 25 min.

[0076] The construction method of the waterproof system of the polymer asphalt waterproof coating and the self-adhesive waterproof roll material is as follows: (1) pour 78 g of the powder into the liquid, start high-speed stirring for mixing, the stirring speed is 900 rpm, and the stirring time is 6 min; (2) pour the remaining 422 g of the powder, and continue high-speed stirring for 17 min; (3) immediately roll the mixed polymer asphalt waterproof coating on the surface of the base layer, then directly lay the self-adhesive modified asphalt waterproof roll material on the surface of the wet coating film and perform exhaust treatment, and the two waterproof layers are obtained after the coating is dried.

[0077] Comparative example 4

[0078] Preparation of modified polymer emulsion: (1) 196 g of styrene-butadiene emulsion was loaded into a reaction vessel, and the reaction vessel was replaced with nitrogen to keep the reaction vessel sealed and air-free, and nitrogen was slowly introduced to ensure that the reaction vessel was filled with nitrogen; (2) the reaction vessel was heated, the stirring speed was controlled at 250 rpm, and the temperature of the polymer emulsion was controlled at 50°C; (3) 5wt% water was slowly added to 4 g of epoxy silane, and ultrasonic dispersion was immediately performed for 25 min to obtain an epoxy silane pre-dispersion; (4) the stirring speed was increased to 600 rpm, and the epoxy silane pre-dispersion was slowly added to the reaction vessel through a constant pressure funnel, and stirring was continued for 35 min after the addition was completed.

[0079] Preparation of liquid material of polymer asphalt waterproof coating: (1) 300 g of anionic emulsified asphalt was added to a stirring tank, and the stirring speed was controlled at 500 rpm; (2) 1.5 g of polyacrylic acid sodium salt wetting dispersant, 1 g of mineral oil defoaming agent, and 1 g of silicone defoaming agent were added; (3) the modified polymer emulsion was added to the stirring tank in three batches, and stirring was continued for 15 min after the addition was completed; (4) 0.9 g of cellulose ether thickening agent and 0.6 g of alkali swelling thickening agent were slowly added, the stirring speed was increased to 800 rpm, and stirring was performed for 40 min.

[0080] Preparation of powder material of polymer asphalt waterproof coating: 200 g of ordinary portland cement, 150 g of barium sulfate, 100 g of quartz powder, and 50 g of talc powder were mixed in a stirring tank at a stirring speed of 300 rpm for 25 min.

[0081] Construction method of waterproof system of polymer asphalt waterproof coating and self-adhesive waterproof roll material: (1) the powder was poured into the liquid material, and high-speed stirring was started for mixing, the stirring speed was 900 rpm, and the stirring time was 6 min; (2) the mixed polymer asphalt waterproof coating was immediately applied on the surface of the base layer by rolling; (3) after the coating was completely dried, the self-adhesive modified asphalt waterproof roll material was laid and exhaust treatment was performed, and two waterproof layers were obtained.

[0082] Comparative Example 5

[0083] A commercially available conventional water-based asphalt coating was applied on the surface of the base layer by rolling, and then the self-adhesive modified asphalt waterproof roll material was directly laid on the surface of the wet coating film and exhaust treatment was performed.

[0084] The asphalt coating and self-adhesive waterproof roll material obtained in the examples and comparative examples were tested for peel strength according to the standard of “High-adhesion and anti-slip water-based rubber asphalt waterproof coating Q / SY YHF 0135-2021”, and for water channeling resistance according to the standard of “Non-cured rubber asphalt waterproof coating JC / T 2428-2017”, and the results are shown in Table 1.

[0085] Table 1. Performance test results of polymer asphalt waterproof coating

[0086]

[0087] Note: 7-day immersion peel strength retention rate = (peel strength after 7-day immersion / peel strength without immersion) * 100%

[0088] As shown in Table 1, by using the polymer emulsion modified in the present application and mixing the liquid and powder materials in steps, the dry speed is faster and no cracks are generated, and the peel strength and 7-day immersion peel strength retention rate are higher compared to Comparative Examples 1-5. Although the same emulsified asphalt, polymer emulsion, powder material and additives are used in Comparative Examples 1-4, Comparative Example 1-3 lacks modification or insufficient modification of the polymer emulsion, and the construction method of the waterproof system in Comparative Example 4 is different, which cannot form the bidirectional interlayer adhesion of the asphalt coating and the self-adhesive waterproof roll material, thus the consistency effect of the present application cannot be obtained.

[0089] The above is a further description of the present application in combination with specific examples, but these examples are only exemplary and do not constitute any limitation on the scope of the present application. Those skilled in the art should understand that the details and forms of the technical solutions of the present application can be modified or replaced without deviating from the spirit and scope of the present application, but these modifications and replacements all fall within the protection scope of the present application.

Claims

1. A polymer bitumen waterproof coating laminated waterproof system, comprising a polymer bitumen waterproof coating and a self-adhesive modified bitumen waterproof membrane bonded together, characterized in that, The polymer asphalt waterproof coating is prepared by mixing liquid and powder. The liquid contains polymer emulsion and emulsified asphalt, and the powder contains active filler. The polymer asphalt waterproof coating laminated waterproof system involves applying a thick layer of polymer asphalt waterproof coating to the substrate surface in one go, and then laying a self-adhesive modified asphalt waterproof membrane on the surface of the damp coating. The polymer emulsion is a modified polymer emulsion, and the preparation method of the modified polymer emulsion includes the following steps: S1. Heat the styrene-butadiene emulsion and / or acrylic emulsion under a nitrogen atmosphere and stir to obtain polymer emulsion 1; S2. Under stirring conditions, epoxy silane pre-dispersion is added dropwise to the polymer emulsion 1 obtained in step S1. After the addition is complete, stirring is continued for 30-60 minutes to obtain the modified polymer emulsion. The preparation method of the epoxy silane pre-dispersion in step S2 is as follows: water is added dropwise to epoxy silane, and ultrasonic dispersion is carried out for 10-30 minutes to obtain the epoxy silane dispersion.

2. The polymer bitumen waterproof coating layered waterproofing system according to claim 1, characterized in that, The active filler is at least one of silicate cement, ordinary silicate cement, slag silicate cement, pozzolanic silicate cement, fly ash silicate cement, and composite silicate cement.

3. The polymer bitumen waterproof coating layered waterproofing system according to claim 1, characterized in that, The epoxy silane is one or more of trimethoxy or triethoxy-terminated epoxy silanes; the mass percentage of water in the epoxy silane dispersion is 1-10%.

4. The polymer bitumen waterproof coating layered waterproofing system according to claim 1, characterized in that, The mass ratio of the liquid to the powder is 1:0.5-5.

5. The polymer bitumen waterproof coating layered waterproofing system according to claim 1, characterized in that, The liquid material further includes a wetting and dispersing agent, a thickener, and an antifoaming agent; the powder material further includes a filler, wherein the filler is at least one selected from calcium carbonate, barium sulfate, titanium dioxide, quartz powder, talc powder, and bentonite.

6. The polymer bitumen waterproof coating layered waterproofing system according to claim 5, characterized in that, The liquid component comprises, by 100% by mass: 20-80% polymer emulsion, 20-80% emulsified asphalt, 0.1-1.0% wetting and dispersing agent, 0.1-1.0% thickener, and 0.1-1.0% defoamer; the powder component comprises, by 100% by mass: 20-80 wt% active filler and 80-20 wt% filler.

7. A wet-laying construction method for a polymer bitumen waterproof coating layered waterproofing system according to any one of claims 1-6, characterized in that, Includes the following steps: (1) Form a wet coating layer on the substrate surface using the polymer bitumen waterproof coating according to any one of claims 1-6; (2) The self-adhesive modified bitumen waterproof membrane is directly laid on the surface of the wet coating layer obtained in step (1), and the air is vented and full adhesion is ensured to obtain the polymer bitumen waterproof coating layer waterproof system.

8. The wet-laying construction method according to claim 7, characterized in that, The application methods for the wet coating layer in step (1) include spraying, rolling, or scraping.

9. The application of the polymer bitumen waterproof coating laminate waterproofing system according to any one of claims 1-6 or the polymer bitumen waterproof coating laminate waterproofing system prepared by the wet-laying construction method according to any one of claims 7-8 in waterproofing projects.

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