Construction method for improving the adhesive property of water emulsion type rubber asphalt waterproofing compound

Abstract

The application relates to the technical field of building coating and discloses a construction method for improving the bonding performance of water emulsion type rubber asphalt waterproof glue, which comprises the following steps: step 1, polishing, drying and curing treatment are performed on the surface of a cement base layer; step 2, a solution of a silane coupling agent is sprayed on the surface of the cement base layer, and infrared lamp irradiation treatment is performed; and step 3, the water emulsion type rubber asphalt waterproof glue is coated on the surface of the cement base layer, a tire base material is attached, surface drying is performed, a second layer of the water emulsion type rubber asphalt waterproof glue is coated, and surface drying is performed. The water emulsion type rubber asphalt glue adopted by the application takes diatomite and SBR as main modified components to improve the high-temperature resistance and aging resistance of the glue, and the combination of the synergistic effect of the silane coupling agent layer after infrared treatment effectively improves the bonding strength of the glue and the cement base layer, obtains the water emulsion type rubber asphalt glue which is suitable for use in high-temperature areas and is high-temperature resistant and aging resistant, and is suitable for large-scale industrial production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building coatings, in particular to a construction method for improving the bonding performance of water emulsion type rubber asphalt waterproof material. BACKGROUND

[0002] Building waterproof coating is a waterproof material processed by mixing a proper amount of modified materials into high molecular materials, inorganic materials, asphalt, polymer modified asphalt and the like, and is of solvent-free type, water-soluble type, water emulsion type or powder type. The building waterproof coating is simple and convenient to construct and is suitable for various waterproof engineering.

[0003] Since asphalt is the main component of the water emulsion type rubber asphalt material, the technical properties of the raw materials have a great influence on the overall performance. Therefore, how to optimize the technical properties of asphalt is also a key problem. However, asphalt material has the characteristics of softening at high temperature and peeling off when encountering water, which makes it difficult to optimize the asphalt itself. Therefore, it is considered to improve the properties of asphalt by adding modifiers to improve the bonding performance of the water emulsion type rubber asphalt material and reduce the possibility of reducing the bonding performance under high temperature conditions, so that it can meet the building use requirements within the designed service life.

[0004] The asphalt modifier refers to a material that can be melted or dispersed in asphalt to improve the performance of asphalt. At present, the most commonly used method is to add organic modifiers (such as SBS, SBR and the like) to improve the performance of asphalt. However, the SBS elastomer has few polar groups, and the interface bonding effect with inorganic fillers and building materials such as concrete, plastic, metal, ceramic and the like is poor, and peeling and debonding occur. Moreover, SBS is expensive and the processing technology is complex. In order to reduce the use cost, a polymer SBR with a lower price than SBS can be added. SBR has outstanding low-temperature performance, and when added to the water emulsion type rubber asphalt material, it can improve the overall low-temperature performance of the material.

[0005] Secondly, with the development of mineral material technology, the application of some powder mineral materials in waterproof coating has been expanded from single structural filling to functional enhancement, playing the role of a modifier. For example, mineral fillers such as diatomite and bentonite, but due to reasons such as the source of mineral materials and economic benefits, they have not been widely applied.

[0006] Diatomite is a siliceous rock, mainly composed of the remains of diatoms (a kind of single-celled aquatic algae) and soft mud, and is a sedimentary mineral. It is mainly distributed in China, the United States, Japan, Denmark and other countries. The diatomite reserves in China are about 1 billion tons. The main components of diatomite are Al2O3, Fe2O3, CaO and the like, and it has the characteristics of multiple pore structure and strong surface adsorption capacity. According to previous research, it is found that diatomite powder can improve the high-temperature performance of asphalt material.

[0007] Based on this, it can be found that the debonding problem of waterproof coating is mostly caused by the insufficient performance of waterproof coating, and combined with the current use of modifiers, diatomite, as an inorganic modifier material with wide sources and low price, has large total area, high porosity and strong adsorption capacity per unit of matter, so as to be used as a modifier of water emulsion type rubber asphalt waterproof material, which can improve the high temperature performance and greatly reduce the modification cost.

[0008] CN103059593A discloses a diatomite compounded SBS modified asphalt and a preparation method thereof, which is prepared from the following raw materials in percentage by weight: base asphalt: 85-90%, thermoplastic styrene-butadiene rubber (SBS): 3-6%, diatomite: 1-6%, rubber oil: 1-5%, sulfur: 2%, and the sum of the percentage by weight of the above raw materials is 100%. After the base asphalt is heated to 180℃, the formula amount of SBS modifier, diatomite and rubber oil is added to obtain a mixture, the mixture is uniformly mixed, stirred at 170-175℃ for 6 hours, 2% sulfur is added, and then stirred for 1 hour to obtain the product. Compared with similar products, the modified asphalt prepared by the method of the application has a softening point of more than 10% higher, saves the production cost of high softening point modified asphalt, and is suitable for ideal road engineering pavement materials in high temperature areas.

[0009] However, for asphalt waterproof coating, the adhesion between the coating and the cement base material needs to be considered, so for high temperature areas, how to solve the problems of easy softening of asphalt and low adhesion still needs to be studied. SUMMARY

[0010] The present application aims at the poor adhesion of water emulsion type rubber asphalt waterproof coating in high temperature environment, and provides a construction method for improving the adhesion of water emulsion type rubber asphalt waterproof coating, which is a high temperature resistant rubber asphalt coating material modified by diatomite and SBR combined with an infrared curing coating method, which can greatly improve the adhesion between the asphalt coating material and the cement base layer, and is more suitable for the field of building waterproofing in high temperature areas.

[0011] To achieve the above object, the technical scheme adopted by the present application is:

[0012] A construction method for improving the adhesion of water emulsion type rubber asphalt waterproof coating material, characterized in that it comprises the following steps:

[0013] Step 1, polishing the surface of the cement base layer to be flat, drying and curing treatment;

[0014] Step 2, spraying a solution of silane coupling agent on the surface of the cement base layer, and treating with infrared lamp irradiation;

[0015] Step 3, the water emulsion type rubber asphalt waterproof material is coated on the surface of the cement base layer irradiated by the infrared lamp, the tire base material is attached, the surface is dried, and the second layer of the water emulsion type rubber asphalt waterproof material is coated, and the surface is dried;

[0016] The water emulsion type rubber asphalt waterproof material comprises the following raw material components in parts by weight:

[0017] Asphalt 40-50 parts, SBS 1-2 parts, SBR 1.5-2.5 parts, diatomite 4-6 parts, dehydrocarbintin 0.2-0.5 parts, CRL-50LK type cationic neoprene latex 15-25 parts, SD-ZL2 cationic medium crack emulsifier 3-6 parts, anhydrous calcium chloride 0.1-0.3 parts, polyvinyl alcohol 2-3 parts, tributyl phosphate 3-5 parts, and heavy calcium powder 10-15 parts.

[0018] In the application, the water emulsion type rubber asphalt waterproof material is modified by diatomite and SBR, so that the overall water emulsion type rubber asphalt material has good high-temperature resistance.

[0019] Meanwhile, the conventional interface treatment material cannot meet the demand for improving the adhesion and mechanical strength, and the key technology in the construction process is combined on the basis of the material formula, the silane coupling agent layer is formed by designing the interface of the vinyl-based silane coupling agent, and the temperature of the surface of the cement base layer is increased by using the infrared lamp heating mode. On the one hand, the silane coupling agent and the cement base layer produce chemical action, and on the other hand, the silane coupling agent and the modified material above are well compatible and are chemically bonded. The application makes a breakthrough in the construction technology performance and has great superiority in the water-based paint and the interface modification system.

[0020] More importantly, the application enhances the adhesion of the overall structure of the waterproof coating to the cement base material by cooperating with the following three interface ways:

[0021] (1) the hydrophobic end (unsaturated olefin group) in the silane coupling agent molecule is chemically bonded to SBR at high temperature to realize the close combination of the organic material component and the inorganic phase;

[0022] (2) the porous structure of diatomite can adsorb asphalt, and the hydroxyl group on the diatomite can be bonded to the silanol group after the hydrolysis of the silane coupling agent molecule, so that part of the stress transmission between the silane coupling agent and the asphalt can be carried out through the diatomite;

[0023] (3) the silanol group after the hydrolysis of the hydrophilic end of the silane coupling agent molecule is chemically bonded to the cement base material to enhance the adhesion of the material to the cement base material.

[0024] The asphalt comprises any one or more of 90# petroleum asphalt and 70# petroleum asphalt;

[0025] The SBS includes any one or more of SBS 791, SBS 791-H; SBS rubber is a block copolymer in the form of styrene-butadiene rubber produced by free radical polymerization. SBS is the most commonly used asphalt modifier, and the SBS modified compound prepared thereby has excellent high and low temperature performance, especially high temperature performance greatly improved over base asphalt; in addition, SBS is the most widely used modifier at present, and has excellent elastic recovery performance and very excellent viscoelasticity. The styrene-to-butadiene block ratio of the SBS 791 and SBS 791-H used above is 30:70.

[0026] The SBR includes any one or more of SBR 1500, SBR 1502. SBR rubber is a random copolymer of butadiene and styrene, and SBR modified compound is more commonly used in cold and strong ultraviolet regions because of its excellent low temperature performance and certain ultraviolet aging resistance. The SBR powder has good compatibility with asphalt, and the low temperature ductility of SBR modified asphalt is better than that of SBS latex modified asphalt; however, the high temperature performance of SBR modified asphalt is not outstanding, and in addition, research shows that SBR modified asphalt has insufficient toughness, and a crosslinking agent is often used to improve its toughness and flexibility.

[0027] The diatomite has a fineness of 500-600 mesh. If the particles are too large, agglomeration will occur, making the dispersibility of diatomite in emulsified asphalt poor. Diatomite has a relatively high content in the modifier, and can combine with SBR, asphalt, and SBS to increase the interface thickness between asphalt and aggregate, resist greater stress, and increase the viscosity of the modified compound, which has excellent high temperature performance. Compared with other mineral particles, diatomite has a larger specific surface area and stronger adsorption capacity for rubber asphalt, and the rough surface of diatomite particles has many protruding particles and forms interstitial pores, has an active adsorption capacity, and is beneficial to the entry of rubber asphalt molecules. Under the action of external force, the voids inside diatomite also play a buffering role for free asphalt, so that the asphalt oil film inside the waterproof coating is in a relatively stable state.

[0028] The surface of diatomite has wrinkles and protrusions, which can fully wet the surface of diatomite. The surface structure of the filler is an important factor affecting wettability, and the rougher the surface of the filler, the better the wettability of asphalt and rubber on the surface.

[0029] The diatomite is added in the present application to improve the adhesion of the asphalt and rubber, the asphalt and other fillers, overcome the misplacement and slip between the structural asphalt and the filler particles, transfer the uniaxial stress generated by the particles to other matrix, and the uniformly dispersed diatomite plays the anchoring and bridging role at the crack tip, delays the crack generation of the waterproof rubber material under high temperature, restrains the crack propagation, increases the cohesive stability of the whole rubber material, and thus improves the high temperature resistance of the whole rubber material.

[0030] The polyvinyl alcohol includes 17-88 type polyvinyl alcohol or 17-92 type polyvinyl alcohol; and / or, the heavy calcium powder fineness is 300-400 mesh.

[0031] Further preferably, considering the high temperature resistance and toughness of the rubber material, more preferably, the water emulsion type rubber asphalt waterproof rubber material includes the following raw material components in weight parts: 90# asphalt 43.5 parts, SBS 791-H 2.0 parts, SBR 1502 2.5 parts, diatomite 6 parts, dehydrocarbintin 0.3 parts, CRL-50LK type cationic neoprene latex 20 parts, SD-ZL2 cationic medium crack emulsifier 4.5 parts, anhydrous calcium chloride 0.2 parts, 17-88 polyvinyl alcohol 2.0 parts, tributyl phosphate 5.0 parts, and 400 mesh heavy calcium powder 14 parts, and the obtained emulsion is used to prepare the water emulsion type rubber asphalt waterproof rubber material, which has better comprehensive performance.

[0032] The preparation method of the water emulsion type rubber asphalt waterproof rubber material includes the following steps:

[0033] S1, heating the base asphalt to 170-180℃, adding SBS and SBR under shearing, and continuing to shear;

[0034] S2, stirring after adding the dehydrocarbintin, adding diatomite at the development temperature of 170-180℃, and then developing to obtain the modified asphalt emulsion;

[0035] S3, preparing a soap solution: adding the SD-ZL2 cationic medium crack emulsifier, the CRL-50LK type cationic neoprene latex, the anhydrous calcium chloride, the polyvinyl alcohol, and the heavy calcium powder in water, heating and keeping warm for standby;

[0036] S4, preheating the emulsified asphalt colloid mill, adding the soap solution first, then adding the preheated modified asphalt emulsion, adding the tributyl phosphate according to the generation of bubbles in the emulsification process, stirring and emulsifying, and cooling to obtain the water emulsion type rubber asphalt waterproof rubber material.

[0037] Further preferably, the preparation method of the water emulsion type rubber asphalt waterproof rubber material includes the following steps:

[0038] S1, the base pitch is heated to 170-180℃, the shearing machine is started, the rotating speed is 1000rpm, SBS, SBR are added, after the addition, the rotating speed is increased to 4000rpm, shearing for 40min.

[0039] S2, dehydrocarbividine is added within 25min, the stirring is changed, diatomite is added at the developing temperature of 170-180℃, stirring for 10min, then developing for 4h to prepare the modified pitch emulsion.

[0040] S3, preparing the soap solution: adding SD-ZL2 cationic emulsifier, CRL-50LK type cationic neoprene latex, anhydrous calcium chloride, 17-88 polyvinyl alcohol, 400 mesh heavy calcium powder in water, heating the soap solution to 60℃, stirring uniformly and keeping warm for standby.

[0041] S4, the modified pitch is heated to 160℃, the emulsified pitch colloid mill is preheated, the soap solution is added first at 60℃, then the modified pitch emulsion is added slowly and uniformly, the defoaming agent is added. After emulsifying for 180s at the rotating speed of 2800-2850rpm, the water emulsion type rubber pitch waterproof coating is prepared by cooling.

[0042] The soap solution obtained in S3 needs to be mixed by a high speed mixer, the rotating speed is above 2000rpm; in S4, in order to mix the latex and the soap solution uniformly, a static mixer is needed.

[0043] Preferably, the dehydrocarbividine is YHL-1 type stabilizer, the stabilizer can make the modified rubber material have obvious chemical reaction, when the content is 0.3 parts, the comprehensive performance of the whole rubber material is better.

[0044] Preferably, the tributyl phosphate is a defoaming agent, the weight fraction of the defoaming agent is 5.0 parts, the usage of the emulsified pitch defoaming agent is determined according to the specific situation, generally, the defoaming agent is added according to the situation of bubble generation.

[0045] In step 1, the pH of the solution of silane coupling agent is 4-5, the mass concentration of the silane coupling agent is 10-20%, the solvent includes methanol, ethanol, isopropyl alcohol, a mixture of methanol and water, a mixture of ethanol and water. Because the stability of silane coupling agent is poor, it is not suitable to be prepared into aqueous solution for use, and it is also not suitable to be prepared into alcohol aqueous solution for use because of the serious condensation reaction during the hydrolysis of silane. Therefore, acetic acid needs to be added as a hydrolysis catalyst to adjust the pH to 4-5, which is conducive to the full contact with the treated surface.

[0046] Further preferably, in step 1, a certain amount of water is first added to the container, stirring is started, the rotating speed is adjusted, then weak acid (acetic acid) is added dropwise to adjust the pH of the solution to 4-5, then the silane coupling agent and a certain amount of alcohol aqueous solution are weighed and added within 3-5min.

[0047] Further preferably, the solvent is methanol or a mixed solution of methanol and water. Methanol is inexpensive, has good volatility, and has a wide source of raw materials, and can quickly hydrolyze the silicic ether into silicic alcohol. The concentration of the methanol solution should be controlled at 70%-90% to be able to be basically dissolved.

[0048] Further preferably, the silane coupling agent alcohol solution is coated on the surface of the cement-based layer in a mist spraying manner. The use of mist spraying can make the silane coupling agent solution more uniformly dispersed and better bonded to the surface of the inorganic cement-based layer.

[0049] Preferably, the infrared lamp irradiation treatment in step 2 is 1-5 min, the infrared lamp irradiation height is 10-20 cm, and the power is 100-200 W.

[0050] The construction method of the present application uses infrared lamp irradiation method, which can uniformly disperse the silane coupling agent alcohol solution on the surface of the cement-based layer through heat treatment: the silane coupling agent alcohol solution is quantitatively mist sprayed on the surface of the cement-based layer in advance, and then the surface is irradiated with an infrared lamp at a set irradiation height and irradiation time, so that the surface temperature reaches 80-120℃, and then subsequent processing is performed.

[0051] Further preferably, the surface temperature of the irradiated cement-based layer reaches 100℃, and at this time the base layer modified by the silane coupling agent alcohol solution has better adhesion and durability with the diatomite / SBR composite modified waterproof rubber compound.

[0052] The curing treatment time in step 1 is 24-48 h; the surface drying time in step 3 is 12-24 h.

[0053] The silane coupling agent is a vinyl coupling agent.

[0054] The silane coupling agent includes one or more of vinyltrimethoxysilane, vinyltriethoxysilane, and vinyltrichlorosilane. Preferably, the silane coupling agent is vinyltrimethoxysilane.

[0055] Compared with the prior art, the present application has the following beneficial effects:

[0056] (1) The water emulsion type rubber asphalt compound of the present application contains diatomite and SBR. In order to cope with the damage of high temperature in tropical regions to the compound, diatomite and SBR composite modified compound are selected. Diatomite can improve the high temperature performance of the compound, and SBR has good mechanical properties after being compounded with SBS, which can meet the use requirements of the compound in high temperature regions.

[0057] (2) The silane coupling agent in the application has low addition amount, excellent adhesion performance, good durability and can maintain good mechanical strength, the surface temperature of the cement base layer is increased through infrared lamp irradiation (heat treatment), the silane is first hydrolyzed into silanol, then the silanol group dehydrates and condenses with the surface of the inorganic filler to form chemical bond connection, the application makes a breakthrough in construction technology performance and has great superiority in water-based paint and interface modification system, and effectively improves the bonding strength of the rubber compound and the surface of the cement base layer.

[0058] (3) The preparation method of the application is simple to operate, easy to control and high in production efficiency, and is suitable for industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 It is a schematic diagram of the combination of the water emulsion type rubber asphalt waterproof rubber compound and the cement base layer in the application.

[0060] Figure 2 It is a schematic diagram of the combination mechanism of the water emulsion type rubber asphalt waterproof rubber compound and the cement base layer in the application.

[0061] Figure 3 It is a SEM micrograph of the diatomite raw material used in Example 1.

[0062] Figure 4 It is an interface adhesion diagram of the modified water emulsion type rubber asphalt waterproof rubber compound and the cement base layer prepared in Example 1.

[0063] Figure 5 It is an interface adhesion diagram of the water emulsion type rubber asphalt waterproof rubber compound and the cement base layer prepared in Comparative Example 1. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the application more clear and explicit, the application will be further described in detail below in combination with examples. It should be understood that the specific examples described herein are only used to explain the application and not to limit the application. Those skilled in the art can modify or replace equivalently without departing from the spirit and scope of the technical scheme of the application, which should be covered within the protection scope of the application.

[0065] The raw materials used in the following specific embodiments are all purchased from the market, SBS rubber and SBR rubber are provided by China Petroleum Chemical Co., Ltd.; 500 mesh diatomite and heavy calcium powder are provided by Hebei Lingshou Dehang Mineral Products Co., Ltd.; dehydrocarbintine, CRL-50LK type cationic neoprene latex and SD-ZL2 cationic medium crack emulsifier are provided by Wuhan Desieler Biological Technology Co., Ltd.; anhydrous calcium chloride and polyvinyl alcohol are provided by Chongqing Bangding Chemical Raw Material Co., Ltd. All commercial chemicals, including methanol and epoxy resin adhesive, are not further purified.

[0066] 1. Cement sample preparation process

[0067] The cement mortar block with size (70x70x20) mm is prepared by using ordinary portland cement with strength grade 42.5, cement and ISO standard sand are stirred according to mass ratio 1:1, the water amount is determined according to the mortar consistency (70-90) mm, the mixture is poured into a mold, vibrated, leveled and smoothed, demolded after 24 h, placed in water for curing for 10 d, then dried in an oven at (50±2) ℃ for (12±0.5) h, taken out and placed under standard temperature (20±2) ℃ for standby, and the floating slurry, floating sand, dust and the like on the surface of the mortar block are removed to prepare five mortar blocks.

[0068] 2. Heat aging test-high temperature environment simulation

[0069] The sample is placed at (60±2) ℃ for 0, 1, 3, 5 and 7 d, then placed at room temperature 20-25 ℃ for 24 h, and the bonding strength test is performed, and the test result is the arithmetic average of the results of five test pieces. Each group has not less than 3 effective test pieces.

[0070] 3. The water emulsion type rubber asphalt compound in the examples and comparative examples is prepared according to the optimal components, and the specific formulation is as follows: 90# asphalt 43.5 parts, SBS 791-H 2.0 parts, SBR 1502 2.5 parts, diatomite 6 parts, dehydrocarveen 0.3 part, CRL-50LK type cationic neoprene latex 20 parts, SD-ZL2 cationic medium crack emulsifier 4.5 parts, anhydrous calcium chloride 0.2 part, 17-88 polyvinyl alcohol 2.0 parts, tributyl phosphate 5.0 parts, and 400-mesh heavy calcium powder 14 parts.

[0071] Example 1

[0072] Preparation of the water emulsion type rubber asphalt compound:

[0073] (1) The base asphalt is heated to 175 ℃, the shearing machine is started, the rotating speed is 1000 rpm, SBS 791-H and SBR 1502 are added, after the addition is completed, the rotating speed is increased to 4000 rpm, and shearing is performed for 40 min.

[0074] (2) The dehydrocarveen is added within 25 min, the stirring is changed, the 500-mesh diatomite is added at a development temperature of 175 ℃, stirring is performed for 10 min, and then the modified asphalt emulsion is prepared after development for 4 h.

[0075] (3) Preparation of the soap solution: the SD-ZL2 cationic medium crack emulsifier, the CRL-50LK type cationic neoprene latex, the anhydrous calcium chloride and the 17-88 polyvinyl alcohol are added to water, the soap solution is heated to 60 ℃, stirred uniformly, and preserved for standby.

[0076] (4) The modified asphalt is heated to 160℃, the emulsified asphalt colloid mill is preheated, the soap solution is first added at 60℃, then the modified asphalt emulsion is slowly and uniformly added, and the defoaming agent is added. After emulsification at 2800 rpm for 180 s, the water emulsion type rubber asphalt waterproof coating is prepared by cooling.

[0077] Water emulsion type rubber asphalt material construction method:

[0078] (1) The 15% concentration of vinyl trimethoxysilane alcohol solution is uniformly sprayed on the surface of the base layer by atomizing spraying, so that it is fully wetted and no standing water is accumulated.

[0079] (2) The surface of the cement base layer is irradiated by a 100W infrared lamp for 2 minutes and 30 seconds, the irradiation height is 10 cm, so that the surface temperature reaches 100℃, and at this time the surface of the base layer is dry.

[0080] (3) The water emulsion type rubber asphalt material is immediately coated on the surface of the modified cement base layer, the tire base material is attached, and the second layer of material is coated after curing for 12 h, and curing for 168 h.

[0081] The structure of the water emulsion type rubber asphalt material prepared on the surface of the cement base layer is shown in Figure 1 , and the schematic diagram of the connection mechanism of each component is shown in Figure 2 . The SEM morphology of the diatomite raw material is shown in Figure 3 .

[0082] Example 2

[0083] Preparation of water emulsion type rubber asphalt material:

[0084] (1) The base asphalt is heated to 175℃, the shearing machine is started, the speed is 1000 rpm, SBS 791-H and SBR1502 are added, after the addition is completed, the speed is increased to 4000 rpm, and shearing is carried out for 40 min.

[0085] (2) Dehydrocarvintin is added within 25 min, stirring is changed, 600 mesh diatomite is added at a development temperature of 175℃, stirring is carried out for 10 min, then the modified asphalt emulsion is prepared after development for 4 h.

[0086] (3) Preparation of soap solution: add SD-ZL2 cationic emulsifier, CRL-50LK type cationic neoprene latex, anhydrous calcium chloride, and polyvinyl alcohol in water, heat the soap solution to 60℃, stir uniformly, and keep warm for standby.

[0087] (4) The modified asphalt is heated to 160℃, the emulsified asphalt colloid mill is preheated, the soap solution is first added at 60℃, then the modified asphalt emulsion is slowly and uniformly added, and the defoaming agent is added. After emulsification at 2800 rpm for 180 s, the water emulsion type rubber asphalt waterproof coating is prepared by cooling.

[0088] The water emulsion type rubber asphalt compound construction method is consistent with the construction method of Example 1.

[0089] Example 3

[0090] Preparation of the water emulsion type rubber asphalt compound:

[0091] (1) The base asphalt is heated to 175°C, the shearing machine is started, the speed is 1000 rpm, SBS 791-H and SBR1500 are added, and after the addition is completed, the speed is increased to 4000 rpm, and shearing is performed for 40 min.

[0092] (2) The dehydrocarviten is added within 25 min, the stirring is changed, 500 mesh diatomite is added at a development temperature of 175°C, stirring is performed for 10 min, and then the modified asphalt emulsion is prepared after development for 4 h.

[0093] (3) Preparation of the soap solution: the SD-ZL2 cationic emulsifier, the CRL-50LK type cationic neoprene latex, anhydrous calcium chloride, and 17-88 polyvinyl alcohol are added to water, the soap solution is heated to 60°C, is uniformly stirred, and is preserved for standby.

[0094] (4) The modified asphalt is heated to 160°C, the emulsified asphalt colloid mill is preheated, the soap solution is first added at 60°C, and then the modified asphalt emulsion is slowly and uniformly added, and a defoaming agent is added. After emulsification for 180 s at a speed of 2800 rpm, the water emulsion type rubber asphalt waterproof coating is prepared after cooling.

[0095] The water emulsion type rubber asphalt compound construction method is consistent with the construction method of Example 1.

[0096] Example 4

[0097] Preparation of the water emulsion type rubber asphalt compound:

[0098] (1) The base asphalt is heated to 175°C, the shearing machine is started, the speed is 1000 rpm, SBS 791-H and SBR1500 are added, and after the addition is completed, the speed is increased to 4000 rpm, and shearing is performed for 40 min.

[0099] (2) The dehydrocarviten is added within 25 min, the stirring is changed, 600 mesh diatomite is added at a development temperature of 175°C, stirring is performed for 10 min, and then the modified asphalt emulsion is prepared after development for 4 h.

[0100] (3) Preparation of the soap solution: the SD-ZL2 cationic emulsifier, the CRL-50LK type cationic neoprene latex, anhydrous calcium chloride, and 17-88 polyvinyl alcohol are added to water, the soap solution is heated to 60°C, is uniformly stirred, and is preserved for standby.

[0101] (4) The modified asphalt is heated to 160°C, the emulsified asphalt colloid mill is preheated, the soap solution is first added at 60°C, then the modified asphalt emulsion is slowly and uniformly added, and the defoaming agent is added. After emulsification at 2800 rpm for 180 s, the water emulsion type rubber asphalt waterproof coating is prepared by cooling.

[0102] The construction method of the water emulsion type rubber asphalt compound is consistent with the construction method of Example 1.

[0103] Example 5

[0104] Preparation of the water emulsion type rubber asphalt compound:

[0105] (1) The base asphalt is heated to 175°C, the shearing machine is turned on, the speed is 1000 rpm, SBS 791-H and SBR 1502 are added, after the addition is completed, the speed is increased to 4000 rpm, and shearing is performed for 40 min.

[0106] (2) Dehydrocarviten is added within 25 min, the stirring is changed, 500 mesh diatomite is added at a development temperature of 175°C, stirring is performed for 10 min, and then the modified asphalt emulsion is prepared after development for 4 h.

[0107] (3) Preparation of the soap solution: the SD-ZL2 cationic emulsifier, the CRL-50LK type cationic neoprene latex, anhydrous calcium chloride, and 17-88 polyvinyl alcohol are added to water, the soap solution is heated to 60°C, is uniformly stirred, and is preserved for standby.

[0108] (4) The modified asphalt is heated to 160°C, the emulsified asphalt colloid mill is preheated, the soap solution is first added at 60°C, then the modified asphalt emulsion is slowly and uniformly added, and the defoaming agent is added. After emulsification at 2800 rpm for 180 s, the water emulsion type rubber asphalt waterproof coating is prepared by cooling.

[0109] Construction method of the water emulsion type rubber asphalt compound:

[0110] (1) The 10% concentration of the vinyl trimethoxysilane alcohol solution is uniformly sprayed on the surface of the base layer in a mist spraying manner, so that it is fully wetted and no standing water is accumulated.

[0111] (2) The surface of the cement base layer is irradiated for 2 minutes and 30 seconds by using a 100W infrared lamp at an irradiation height of 10 cm, so that the surface temperature reaches 100°C, and at this time, the surface of the base layer is dry.

[0112] (3) The water emulsion type rubber asphalt compound is immediately coated on the surface of the modified cement base layer, the tire base material is attached, curing is performed for 12 h, the second layer of the compound is coated, and curing is performed for 168 h.

[0113] Example 6

[0114] The rubber asphalt emulsion was prepared according to the method of Example 1.

[0115] The rubber asphalt emulsion was prepared according to the method of Example 1.

[0116] (1) The vinyltrichlorosilane solution with a concentration of 15% was uniformly sprayed on the surface of the base layer by atomizing spraying, so that it was fully wetted and no obvious water accumulated.

[0117] (2) The surface of the cement base layer was irradiated by a 100W infrared lamp for 2 minutes and 30 seconds, with an irradiation height of 10 cm, so that the surface temperature reached 100°C, and at this time the surface of the base layer was dry.

[0118] (3) The rubber asphalt emulsion was immediately coated on the surface of the modified cement base layer, and the tire base material was attached. After curing for 12 hours, the second layer of rubber asphalt emulsion was coated, and curing was performed for 168 hours.

[0119] Example 7

[0120] The rubber asphalt emulsion was prepared according to the method of Example 1.

[0121] The rubber asphalt emulsion was prepared according to the method of Example 1.

[0122] (1) The vinyltrichlorosilane solution with a concentration of 15% was uniformly sprayed on the surface of the base layer by atomizing spraying, so that it was fully wetted and no obvious water accumulated.

[0123] (2) The surface of the cement base layer was irradiated by a 100W infrared lamp for 2 minutes and 30 seconds, with an irradiation height of 10 cm, so that the surface temperature reached 100°C, and at this time the surface of the base layer was dry.

[0124] (3) The rubber asphalt emulsion was immediately coated on the surface of the modified cement base layer, and the tire base material was attached. After curing for 12 hours, the second layer of rubber asphalt emulsion was coated, and curing was performed for 168 hours.

[0125] Comparative Example 1

[0126] Note: No SBR, diatomite, silane coupling agent was added, and no infrared irradiation was performed.

[0127] Preparation of the rubber asphalt emulsion:

[0128] (1) The base asphalt was heated to 175°C, and the shearing machine was started with a speed of 1000 rpm. After the SBS791-H was added, the speed was increased to 4000 rpm, and shearing was performed for 40 minutes.

[0129] (2) The dehydrocarvicol was added within 25 minutes, and the stirring was changed. After 4 hours of development, the modified asphalt emulsion was prepared.

[0130] (3) Preparation of soap solution: add SD-ZL2 cationic middle- split emulsifier, CRL-50LK type cationic neoprene latex, anhydrous calcium chloride, 17-88 polyvinyl alcohol in water, heat the soap solution to 60°C, stir uniformly and keep warm for standby.

[0131] (4) Heat the modified asphalt to 160°C, preheat the emulsified asphalt colloid mill, first add the soap solution at 60°C, then slowly and uniformly add the modified asphalt emulsion, and add the defoaming agent. After emulsification at 2800 rpm for 180 s, the water emulsion type rubber asphalt waterproof coating is prepared by cooling.

[0132] Water emulsion type rubber asphalt material construction method: coat the first layer of water emulsion type rubber asphalt material on the surface of the cement base layer, attach the tire base material, maintain for 12 h, coat the second layer of material, and maintain for 168 h.

[0133] Comparative Example 2

[0134] Note: No diatomite is added, no silane coupling agent is added, and no infrared irradiation is performed.

[0135] Preparation of water emulsion type rubber asphalt material:

[0136] (1) Heat the base asphalt to 175°C, start the shear machine, rotate at 1000 rpm, add SBS 791-H and SBR1502, after adding, increase the rotation speed to 4000 rpm, and shear for 40 min.

[0137] (2) Add dehydrocarvicol within 25 min, change the stirring, and then develop for 4 h to prepare the modified asphalt emulsion.

[0138] (3) Preparation of soap solution: add SD-ZL2 cationic middle- split emulsifier, CRL-50LK type cationic neoprene latex, anhydrous calcium chloride, 17-88 polyvinyl alcohol in water, heat the soap solution to 60°C, stir uniformly and keep warm for standby.

[0139] (4) Heat the modified asphalt to 160°C, preheat the emulsified asphalt colloid mill, first add the soap solution at 60°C, then slowly and uniformly add the modified asphalt emulsion, and add the defoaming agent. After emulsification at 2800 rpm for 180 s, the water emulsion type rubber asphalt waterproof coating is prepared by cooling.

[0140] Water emulsion type rubber asphalt material construction method is consistent with Comparative Example 1

[0141] Comparative Example 3

[0142] Note: No SBR is added, no silane coupling agent is added, and no infrared irradiation is performed.

[0143] Preparation of water emulsion type rubber asphalt material:

[0144] (1) The base pitch is heated to 175°C, the shearing machine is started, the speed is 1000 rpm, SBS 791-H is added, after the addition, the speed is increased to 4000 rpm, and shearing is performed for 40 min.

[0145] (2) Dehydrocarvintine is added within 25 min, the stirring is changed, 500 mesh diatomite is added at the development temperature of 175°C, stirring is performed for 10 min, and then the modified pitch emulsion is prepared after development for 4 h.

[0146] (3) The soap solution is prepared: the cationic emulsifier SD-ZL2, the cationic neoprene latex CRL-50LK, anhydrous calcium chloride, and 17-88 polyvinyl alcohol are added in water, the soap solution is heated to 60°C, is uniformly stirred, and is preserved for standby.

[0147] (4) The modified pitch is heated to 160°C, the emulsified pitch colloid mill is preheated, the soap solution is added at 60°C, then the modified pitch emulsion is slowly and uniformly added, and the defoaming agent is added. After emulsification for 180 s at the speed of 2800 rpm, the water emulsion type rubber pitch waterproof coating is prepared after cooling.

[0148] The water emulsion type rubber pitch coating is prepared by the method consistent with that in Example 1.

[0149] Comparative Example 4

[0150] Note: SBR and diatomite are not added, the silane coupling agent is used, and infrared irradiation is used.

[0151] The water emulsion type rubber pitch coating is prepared by the method consistent with that in Example 1.

[0152] The water emulsion type rubber pitch coating is prepared by the method consistent with that in Example 1.

[0153] Comparative Example 5

[0154] Note: Diatomite is not added, the silane coupling agent is used, and infrared irradiation is used.

[0155] The water emulsion type rubber pitch coating is prepared by the method consistent with that in Example 1.

[0156] The water emulsion type rubber pitch coating is prepared by the method consistent with that in Example 1.

[0157] Comparative Example 6

[0158] Note: SBR is not added, the silane coupling agent is used, and infrared irradiation is used.

[0159] The water emulsion type rubber pitch coating is prepared by the method consistent with that in Example 1.

[0160] The water emulsion type rubber pitch coating is prepared by the method consistent with that in Example 1.

[0161] Performance test

[0162] The test pieces after construction of the water emulsion type rubber asphalt mastic prepared in Examples 1-7 were compared with the water emulsion type rubber asphalt mastic prepared in Comparative Examples 1-7 and the test pieces after construction thereof, and a heat aging environment simulation experiment was performed, and the adhesive strength was compared. The detection standard was in accordance with GB / T 16777-2008 "Building Waterproof Coating Test Method". The mortar block prepared before the test should be placed under standard test conditions for more than 24 hours. The test was stretched to the destruction of the test piece at a speed of (5±1) mm / min, and the maximum tensile force of the test piece was recorded. The test temperature was (23±2) °C. The test results are shown in Table 1.

[0163] The morphology of the interface bonding between the modified water emulsion type rubber asphalt waterproof mastic of Example 1 and the cement base layer (silane coupling agent was added in the middle of the interface) is shown in FIG. 1, and the morphology of the interface bonding between the unmodified water emulsion type rubber asphalt waterproof mastic of Comparative Example 1 and the cement base layer is shown in FIG. 2. As can be clearly seen therefrom, there are obvious defects between the mastic of Comparative Example 1 and the cement base layer, and the gaps are large. Since the mastic and the base layer cannot be completely tightly bonded, there are also smaller gaps in Example 1, but it can be observed from the figure that it has more bonding points, and therefore the adhesive strength is also higher. Figure 4 Figure 5 Figure 4

[0164] Table 1 Adhesive strength (MPa) of examples and comparative examples after different days of heat aging

[0165]

[0166]

[0167] [Note]: When the adhesive strength is higher than 0.75 MPa, it is determined that the bonding performance of the test piece is excellent.

[0168] From the performance test results obtained in Table 1, Examples 1-2 and Examples 3-4, the influence of the diatomite modified water emulsion type rubber asphalt mastic of different mesh sizes on the adhesive strength after construction was studied. From the results, it can be seen that when the same type of SBR is used in the modified mastic and the diatomite of 500 mesh is doped, the adhesive strength of the water emulsion type rubber asphalt mastic is higher under high temperature conditions and tends to be stable. This shows that the diatomite of 500 mesh has more excellent compatibility in the mastic, and the performance of resisting high temperature is maximized. From the performance test results of Examples 1 and 3, when the same mesh size of diatomite is doped in the modified mastic and different types of SBR are used, it can be seen that 1502 SBR is more advantageous, and the adhesive strength is higher.

[0169] ​​​From the performance test results of Examples 1, 5, it can be seen that the water emulsion type rubber asphalt compound is modified by using the same modifier (500 mesh diatomite, 1502 SBR), and the inorganic base layer surface is treated by using different concentrations of vinyl trimethoxysilane alcohol solution, and the bonding performance varies. When the concentration of the vinyl trimethoxysilane alcohol solution is 10%, the bonding performance tends to be stable under high temperature conditions, but the bonding strength is lower than that of Example 1 in which the concentration of the vinyl trimethoxysilane alcohol solution is 15%. The reason may be that when the content of the silane coupling agent is low, a monolayer cannot be formed on the interface layer, which reduces the interfacial adhesion between the compound and the inorganic base layer, and cannot effectively connect the SBR rubber in the water emulsion type rubber asphalt compound and the diatomite inorganic material.

[0170] From the performance test results of Examples 1, 6, 7, it can be seen that the water emulsion type rubber asphalt compound is modified by using the same modifier (500 mesh diatomite, 1502 SBR), and the inorganic base layer surface is treated by using different types of vinyl silane coupling agent alcohol solution, and the bonding strength is similar. The reason is that the vinyl in both of them has good affinity with SBR rubber, which is easy to combine with organic matter such as rubber, and the other side will hydrolyze to produce silicon hydroxyl, which will couple with the hydroxyl on the surface of the inorganic base layer. However, when vinyl trimethoxysilane is used, the bonding strength is the highest, and the reason may be that the methoxy group in the vinyl trimethoxysilane is more conducive to the hydrolysis and condensation reaction, which will promote the formation of chemical bonds with high strength, greatly improving the bonding strength.

[0171] From Comparative Examples 1-6, it can be seen that whether the water emulsion type rubber asphalt compound is modified by a single material or a composite material, diatomite is better than SBR in improving the bonding performance. For the inorganic base layer treated by the vinyl trimethoxysilane alcohol solution, the bonding strength is improved more, which shows that the silane coupling agent alcohol solution effectively performs a close chemical and physical combination between the base layer and the compound.

[0172] From the above, it can be seen that whether it is the addition of diatomite and SBR or the construction of the silane coupling agent layer on the surface of the inorganic base layer, both play an important role in the bonding performance of the overall compound under high temperature conditions, and improper or incorrect addition of components will lead to a decrease in the bonding performance of the product. The data in Table 1 shows that the water emulsion type rubber asphalt compound obtained in Examples 1-7 has a high bonding strength, and after being subjected to high temperature for 7 days, it still maintains a relatively stable and excellent bonding strength, which can be applied to building waterproof materials in tropical regions (relatively dry).

[0173] The present application, the combination of each component in the use amount range defined in the present application can obtain rubber asphalt material with good water emulsion type, such as different manufacturers of asphalt types, the change of diatomite fineness, etc. can obtain water emulsion type rubber asphalt material with high temperature resistance, some parameters such as stirring speed in the preparation process are not strictly present, and the stirring speed is suitable for uniform mixing of each component. The alcohol and water mixture of silane coupling agent on the surface of inorganic base layer needs to be mainly atomized, and the amount and proportion should be within the range defined in the present application, which is more conducive to the compatibility and binding force of silane coupling agent on the interface. Therefore, any combination within the use amount range defined in the present application is suitable for the present application. Here, no more description is made.

Claims

1. A construction method for improving the bonding performance of water-emulsion rubber asphalt waterproofing compound, characterized in that, Including the following steps: Step 1: Grind the cement base surface smooth, and then dry and cure it. Step 2: Spray the silane coupling agent solution onto the cement substrate surface and treat it with infrared lamp irradiation. Step 3: Apply the water-emulsion rubber asphalt waterproofing adhesive to the cement base surface irradiated by infrared lamps, cover with the base material, allow to dry to the surface, then apply a second layer of water-emulsion rubber asphalt waterproofing adhesive, and allow to dry to the surface. The water-emulsion type rubber asphalt waterproofing compound comprises the following raw material components by weight: 40-50 parts asphalt, 1-2 parts SBS, 1.5-2.5 parts SBR, 4-6 parts diatomaceous earth, 0.2-0.5 parts dehydrocarbetin, 15-25 parts CRL-50LK type cationic chloroprene latex, 3-6 parts SD-ZL2 cationic medium-crack emulsifier, 0.1-0.3 parts anhydrous calcium chloride, 2-3 parts polyvinyl alcohol, 3-5 parts tributyl phosphate, and 10-15 parts heavy calcium carbonate powder; In step 1, the pH of the silane coupling agent solution is 4-5, and the mass concentration of the silane coupling agent is 10-20%. The diatomaceous earth has a fineness of 500-600 mesh; the silane coupling agent is any one or more of vinyltrimethoxysilane and vinyltriethoxysilane.

2. The construction method for improving the bonding performance of water-emulsion rubber asphalt waterproofing compound according to claim 1, characterized in that, The asphalt includes any one or more of 90# petroleum asphalt and 70# petroleum asphalt; And / or, the SBS includes any one or more of SBS 791 and SBS 791-H; And / or, the SBR includes any one or more of SBR 1500 and SBR 1502.

3. The construction method for improving the bonding performance of water-emulsion rubber asphalt waterproofing compound according to claim 1, characterized in that, The polyvinyl alcohol includes type 17-88 polyvinyl alcohol or type 17-92 polyvinyl alcohol; and / or, the fineness of the heavy calcium carbonate powder is 300-400 mesh.

4. The construction method for improving the bonding performance of water-emulsion rubber asphalt waterproofing compound according to claim 1, characterized in that, The preparation method of the water-emulsion type rubber asphalt waterproofing compound includes the following steps: S1, heat the base bitumen to 170-180℃, add SBS and SBR under shearing, and continue shearing; S2, after adding dehydrocarbetin and stirring, diatomaceous earth is added at a development temperature of 170-180℃, stirred, and then developed to obtain modified asphalt emulsion; S3, Preparation of soap solution: Add SD-ZL2 cationic medium-crack emulsifier, CRL-50LK type cationic chloroprene latex, anhydrous calcium chloride, polyvinyl alcohol, and heavy calcium carbonate powder to water, mix and heat, and keep warm for later use; S4, after preheating the emulsified asphalt colloid mill, soap solution is added first, followed by preheated modified asphalt emulsion. Tributyl phosphate is added according to the amount of bubbles generated during emulsification, and the mixture is stirred and emulsified. After cooling, the water-emulsion type rubber asphalt waterproof compound is obtained.

5. The construction method for improving the bonding performance of water-emulsion rubber asphalt waterproofing compound according to claim 1, characterized in that, The solvents used in the silane coupling agent solution in step 1 include methanol, ethanol, isopropanol, a mixture of methanol and water, and a mixture of ethanol and water.

6. The construction method for improving the bonding performance of water-emulsion rubber asphalt waterproofing compound according to claim 1, characterized in that, In step 2, the infrared lamp is used for irradiation for 1-5 minutes. The infrared lamp is irradiated at a height of 10-20cm and has a power of 100-200W.

7. The construction method for improving the bonding performance of water-emulsion rubber asphalt waterproofing compound according to claim 1, characterized in that, The curing time in step 1 is 24-48 hours; the surface drying time in step 3 is 12-24 hours.

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