A reactive non-stick wheel interlayer binder, its preparation method and application

Abstract

The present invention provides a reactive non-sticking wheel interlayer binder, its preparation method and application, which relate to the technical field of road engineering. The reactive non-sticking wheel interlayer binder provided by the present invention comprises separately packaged component A and component B; the mass ratio of component A to component B is 1 to 6:1; the solid content of component B is 5 to 40%; by mass fraction, component A comprises: matrix asphalt 40 to 60%, solid modifier 3 to 5%, liquid modifier 2 to 6%, emulsifier 0.7 to 1.5%, water 30 to 50%; by mass fraction, component B comprises: silicone-based emulsion 0 to 5%, polyethylene wax-based emulsion 5 to 10%, special monomer 0 to 5%, water 85 to 95%. The reactive non-sticking wheel interlayer binder provided by the present invention has good bonding performance, fast demulsification speed, non-sticking to the wheel after construction, good environmental protection performance, can improve construction efficiency, enhance interlayer bonding performance, and extend the service life of the road surface.

Description

Technical Field

[0001] The present invention relates to the technical field of road engineering, and particularly relates to a reactive non-sticking wheel interlayer binder, a preparation method thereof and an application thereof. Background Art

[0002] The quality of pavement interlayer bonding is one of the important factors affecting the service life of the pavement. Usually, bonding materials are set between pavement structural layers to form a complete stress structure between each layer of the pavement, which can avoid or reduce the slip or shear failure of the pavement interlayer structure caused by traffic loads and improve the durability of the pavement.

[0003] At present, emulsified asphalt or modified emulsified asphalt is mostly used as the bonding layer material between layers in China, which greatly improves the bonding performance between interfaces and extends the service life of the pavement. However, there are still the following deficiencies in terms of technology and construction: when adopting the asynchronous construction method, the phenomenon that the bonding material is taken away by the wheels of the asphalt mixture paving vehicle often occurs. Especially when the pavement temperature is above 60°C, the wheel sticking phenomenon is more obvious, resulting in the loss of tack coat oil in some layers and causing local defects between layers, increasing the risk of interlayer damage; at the same time, during asynchronous construction, due to the long demulsification and curing time of most emulsified asphalt, the implementation of subsequent paving processes is affected, the construction efficiency cannot be guaranteed, and there is also a possibility that the interlayer may be contaminated by dust and powder, affecting the interlayer bonding performance; when adopting synchronous construction, the emulsified asphalt is not completely demulsified and is covered by the asphalt mixture below, and the emulsified asphalt cannot be demulsified for a long time, greatly weakening the bonding performance of the emulsified asphalt between layers. Summary of the Invention

[0004] The purpose of the present invention is to provide a reactive non-sticking wheel interlayer binder, a preparation method thereof and an application thereof. The reactive non-sticking wheel interlayer binder provided by the present invention has good bonding performance, fast demulsification speed, non-sticking wheels after construction, good environmental protection performance, can improve construction efficiency, enhance interlayer bonding performance and extend the service life of the pavement.

[0005] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0006] The present invention provides a reactive non-sticking wheel interlayer binder, which includes independently packaged component A and component B; the mass ratio of component A to component B is 1-6:1; the solid content of component B is 5-40%;

[0007] By mass fraction, component A includes: matrix asphalt 40-60%, solid modifier 3-5%, liquid modifier 2-6%, emulsifier 0.7-1.5%, water 30-50%;

[0008] In terms of mass fraction, the component B includes: 0-5% of silicone emulsion, 5-10% of polyethylene wax emulsion, 0-5% of special monomer, and 85-95% of water.

[0009] Preferably, the solid modifier in the component A is a mixture of SBS modifier, petroleum resin and nano calcium carbonate; the mass ratio of the SBS modifier, petroleum resin and nano calcium carbonate is 40-70:15-35:25-40.

[0010] Preferably, the liquid modifier in the component A is one or two of SBR latex and modified polyurethane resin emulsion.

[0011] Preferably, the emulsifier in the component A is a cationic quick-breaking emulsifier.

[0012] Preferably, the silicone emulsion in the component B includes any one of modified silicone emulsion and silicone monomer emulsion.

[0013] Preferably, the polyethylene wax emulsion in the component B includes any one of oxidized polyethylene wax emulsion and polyethylene wax emulsion.

[0014] Preferably, the special monomer in the component B is silicone-modified styrene-acrylic emulsion.

[0015] The present invention provides a preparation method of the reactive non-stick wheel interlayer binder described in the above technical solution, including the following steps:

[0016] Heat the matrix asphalt to obtain molten asphalt;

[0017] Mix the molten asphalt and the solid modifier and carry out development to obtain modified asphalt;

[0018] Mix the modified asphalt with the liquid modifier, emulsifier and water to obtain component A;

[0019] Mix the silicone emulsion, polyethylene wax emulsion, special monomer and water to obtain component B.

[0020] The present invention provides the application of the reactive non-stick wheel interlayer binder described in the above technical solution or the reactive non-stick wheel interlayer binder prepared by the preparation method described in the above technical solution in the road surface interlayer.

[0021] Preferably, the application includes the following steps:

[0022] Spray the component A and component B on the road surface interlayer in sequence.

[0023] The present invention provides a reactive non-stick wheel interlayer binder, which comprises separately packaged component A and component B; the mass ratio of component A to component B is 1-6:1; the solid content of component B is 5-40%; by mass fraction, component A comprises: matrix asphalt 40-60%, solid modifier 3-5%, liquid modifier 2-6%, emulsifier 0.7-1.5%, water 30-50%; by mass fraction, component B comprises: silicone-based emulsion 0-5%, polyethylene wax-based emulsion 5-10%, special monomer 0-5%, water 85-95%. In the present invention, component A is the main body of the interlayer binder, playing the main bonding role. Component A and component B cooperate together to synergistically exhibit non-stick wheel property. The non-stick wheel mechanism is that due to the different acid-base properties of component A and component B, the stable state environments they are in are damaged, accelerating the occurrence of demulsification. The fine particles in component B exist on the surface layer of component A due to density reasons and the bonding effect of component A, achieving the non-stick wheel effect. And due to the special nature of the materials in component B, it can be softened at high temperature and fuse with component A to continue to play the bonding role.

[0024] Through the cooperative action of each component, the reactive non-stick wheel interlayer binder of the present invention can quickly demulsify and form a film during construction, has good anti-sticking property to wheels but does not affect its bonding function. The reactive non-stick wheel interlayer binder provided by the present invention has good bonding performance, fast demulsification speed, non-stick wheel after construction, good environmental protection performance, can improve construction efficiency, enhance interlayer bonding performance, and extend the service life of the road surface. In addition, the present invention does not need to additionally add stabilizers and acid-base regulators, making the preparation process simple, with high emulsification efficiency and production efficiency. Detailed implementation manners

[0025] The present invention provides a reactive non-stick wheel interlayer binder, which comprises separately packaged component A and component B; the mass ratio of component A to component B is 1-6:1; the solid content of component B is 5-40%;

[0026] By mass fraction, component A comprises: matrix asphalt 40-60%, solid modifier 3-5%, liquid modifier 2-6%, emulsifier 0.7-1.5%, water 30-50%;

[0027] By mass fraction, component B comprises: silicone-based emulsion 0-5%, polyethylene wax-based emulsion 5-10%, special monomer 0-5%, water 85-95%.

[0028] In the present invention, unless otherwise specified, the raw materials used are all commercially available products well-known to those skilled in the art.

[0029] The reactive non-stick wheel interlayer binder provided by the present invention includes component A. In the present invention, by mass fraction, component A includes: matrix asphalt 40-60%, solid modifier 3-5%, liquid modifier 2-6%, emulsifier 0.7-1.5%, and water 30-50%.

[0030] By mass fraction, component A includes matrix asphalt 40-60%, preferably 47-57%. In the present invention, the grade of the matrix asphalt is preferably 70# or 90#; the brand of the matrix asphalt is preferably one or more of SK matrix asphalt, Esso matrix asphalt, and Shell matrix asphalt.

[0031] By mass fraction, component A includes solid modifier 3-5%, preferably 3.5-4%. In the present invention, the solid modifier is preferably a mixture of SBS modifier, petroleum resin, and nano calcium carbonate; the mass ratio of SBS modifier, petroleum resin, and nano calcium carbonate is preferably 40-70:15-35:25-40. In the present invention, the SBS modifier preferably includes one or several of YH-791, YH-792, and SBS101. In the present invention, the petroleum resin preferably includes one or several of C5, C9, hydrogenated C5, and hydrogenated C9. In the present invention, the particle size of the nano calcium carbonate is preferably 3000-10000 mesh. The present invention uses the above solid modifier to improve the emulsification effect.

[0032] By mass fraction, component A includes liquid modifier 2-6%, preferably 3-5%. In the present invention, the liquid modifier is preferably one or two of SBR latex and modified polyurethane resin emulsion. In the present invention, when the liquid modifier is a mixture of SBR latex and modified polyurethane resin emulsion, the mass ratio of SBR latex and modified polyurethane resin emulsion is preferably 2:3-1. In the present invention, the solid content of the SBR latex is preferably 40-60%. In the present invention, the solid content of the modified polyurethane resin emulsion is preferably 40-50%. In the present invention, the modified polyurethane resin emulsion is preferably a polyether type polyurethane resin emulsion, an epoxy group silane modified waterborne polyurethane emulsion, or a silicone modified polyurethane emulsion. In the present invention, the liquid modifier can assist the solid modifier to jointly improve the performance of component A as a road material, and at the same time can cooperate with other components to exert the non-stick wheel property.

[0033] By mass fraction, the component A includes 0.7 - 1.5% of an emulsifier, preferably 1.0 - 1.2%. In the present invention, the emulsifier is preferably a cationic quick-breaking emulsifier, more preferably a cationic quick-breaking emulsifier dedicated to modified asphalt. In the present invention, the content of the active ingredient in the emulsifier is preferably ≥50 wt%, and the pH value of the 1 wt% aqueous solution of the emulsifier is preferably 3 - 7. In the present invention, the emulsifier has good emulsifying performance, and the emulsion after emulsification has high stability, and there is no need to additionally add a stabilizer and adjust the acidity.

[0034] By mass fraction, the component A includes 30 - 50% of water, preferably 40 - 45%.

[0035] By mass fraction, the component A preferably further includes 1.5 - 2% of extraction oil. In the present invention, the function of the extraction oil is to improve the dispersion of the solid modifier in the asphalt and improve the storage stability of the modified asphalt.

[0036] The reactive non-stick wheel interlayer binder provided by the present invention includes a component B. In the present invention, by mass fraction, the component B includes: 0 - 5% of an organosilicon-based emulsion, 5 - 10% of a polyethylene wax-based emulsion, 0 - 5% of a special monomer, and 85 - 95% of water. In the present invention, the solid content of the component B is 5 - 40%, preferably 10 - 30%.

[0037] By mass fraction, the component B includes 0 - 5% of an organosilicon-based emulsion, preferably 2.5 - 4%. In the present invention, the solid content of the organosilicon-based emulsion is preferably 35 - 40%. In the present invention, the organosilicon-based emulsion preferably includes any one of a modified organosilicon-based emulsion and an organosilicon monomer-based emulsion. In the present invention, the modified organosilicon-based emulsion is preferably an organosiloxane polymer emulsion; the organosilicon monomer-based emulsion preferably includes any one of a non-ionic organosilicon monomer emulsion and a cationic organosilicon monomer emulsion. In the present invention, the organosilicon-based emulsion can synergistically improve the wheel adhesion problem that occurs during the construction application of the binder, and has the properties of fast surface drying and film formation, good strength and water resistance.

[0038] By mass fraction, the component B includes 5-10% of polyethylene wax emulsion, preferably 6-7%. In the present invention, the solid content of the polyethylene wax emulsion is preferably 38-42%, more preferably 40%. In the present invention, the polyethylene wax emulsion preferably includes any one of oxidized polyethylene wax emulsion and polyethylene wax emulsion. In the present invention, the softening point of the polyethylene wax emulsion is preferably 90-110 °C; the melting point is preferably 120-125 °C. In the present invention, the polyethylene wax emulsion has excellent chemical resistance, wear resistance, and anti-adhesion performance. When laying hot asphalt mixture on the tack coat, as a modifier, it can melt at high temperature and quickly combine with asphalt. Due to its good compatibility with asphalt, it can significantly improve the performance of the tack coat.

[0039] By mass fraction, the component B includes 0-5% of special monomers, preferably 2-4%. In the present invention, the special monomers are preferably organosilicon-modified styrene-acrylic emulsions, specifically preferably organosilicon-modified self-crosslinking styrene-acrylic nano-emulsions. In the present invention, the solid content of the organosilicon-modified styrene-acrylic emulsion is preferably 40-45%. In the present invention, the special monomers are water-based self-drying film-forming emulsions, which will undergo self-crosslinking reaction with oxygen in the air, thereby locally reducing the adhesiveness and having good anti-sticking property to wheels.

[0040] By mass fraction, the component B includes 85-95% of water, preferably 90-92.5%.

[0041] The present invention provides a preparation method of the reactive non-sticking wheel interlayer binder according to the above technical scheme, including the following steps:

[0042] Heat the base asphalt to obtain molten asphalt;

[0043] Mix the molten asphalt and solid modifier and carry out development to obtain modified asphalt;

[0044] Mix the modified asphalt with liquid modifier, emulsifier and water to obtain component A;

[0045] Mix organosilicon emulsion, polyethylene wax emulsion, special monomers and water to obtain component B.

[0046] The preparation process of the present invention does not require complicated and complex processes, has no high requirements for equipment, is easy to implement, and saves time and economic costs.

[0047] The present invention heats the base asphalt to obtain molten asphalt. The present invention preferably heats the base asphalt to a flowing state and performs shear stirring. In the present invention, the heating temperature is preferably 145 °C. In the present invention, the shear stirring rate is preferably 3000-4000 r / min.

[0048] In the present invention, the temperature of the molten asphalt is preferably 180 °C.

[0049] After obtaining the molten asphalt, the present invention mixes the molten asphalt and a solid modifier and allows them to develop to obtain a modified asphalt. In a specific embodiment of the present invention, it is preferred to mix the molten asphalt, the solid modifier and the extraction oil. In the present invention, when the solid modifier is a mixture of an SBS modifier, a petroleum resin and nano-calcium carbonate, it is preferred to sequentially add the SBS modifier, nano-calcium carbonate, petroleum resin and extraction oil to the molten asphalt. In the present invention, the mixing is preferably carried out under shear stirring conditions, and the rate of the shear stirring is preferably 3000 - 4000 r / min, more preferably 3800 r / min; the time of the shear stirring is preferably 3.5 h. In the present invention, the temperature for development is preferably 160 - 165 °C, more preferably 165 °C; the time for development is preferably 1.5 - 2 h, more preferably 1.5 h.

[0050] After obtaining the modified asphalt, the present invention mixes the modified asphalt with a liquid modifier, an emulsifier and water to obtain Component A. In the present invention, the temperature of the mixing is preferably 55 - 65 °C. In the present invention, the mixing of the modified asphalt, the liquid modifier, the emulsifier and water preferably includes: adding the liquid modifier, the emulsifier and water to a colloid mill emulsifier to obtain a soap solution; controlling the temperature of the soap solution at 50 - 70 °C, circulating and shearing for 1 - 2 min, and then adding the modified asphalt for grinding and emulsification. In the present invention, the shear rate of the circulating shearing and the grinding and emulsification is independently preferably 3500 - 4000 r / min, more preferably 3900 r / min; the shear time of the grinding and emulsification is preferably 2 - 3 min.

[0051] The present invention mixes an organosilicon emulsion, a polyethylene wax emulsion, a special monomer and water to obtain Component B. In the present invention, the temperature of the mixing is preferably room temperature. In the present invention, the mixing is preferably carried out under stirring conditions; the rate of the stirring is preferably 200 - 500 r / min, more preferably 450 r / min; the time of the stirring is preferably 3 - 4 min.

[0052] The present invention provides the application of the reactive non-stick wheel interlayer binder described in the above technical solution or the reactive non-stick wheel interlayer binder prepared by the preparation method described in the above technical solution in the road surface interlayer.

[0053] In the present invention, the application preferably includes the following steps:

[0054] Spray Component A and Component B on the road surface interlayer in sequence.

[0055] In the present invention, the spraying amount of Component A is preferably 0.4 - 1 kg / m2 , more preferably 0.5 kg / m 2 ; the spraying amount of component B is preferably 0.12 - 0.4 kg / m 2 , more preferably 0.18 - 0.32 kg / m 2 . In the present invention, the spraying time interval between component A and component B is preferably less than 3 min. In the present invention, the temperature between the road surface layers is preferably 10 - 60 °C.

[0056] The present invention preferably cures for 10 - 30 min after the spraying. The present invention cures to make the reaction-type non-stick wheel interlayer binder break and become surface dry.

[0057] Using the binder of the present invention can obtain the effect of not bonding the wheels in the subsequent processes, ensure the quality of tack coat spraying, effectively prevent the shear failure between layers, and thus extend the service life of the road surface. Without heating, the construction process is simple and the construction efficiency is improved.

[0058] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] Example 1

[0060] Prepare component A modified asphalt emulsion with the following raw materials: 70# Shell base asphalt, SBS modifier, C9 petroleum resin, nano calcium carbonate, extracted oil, SBR latex, polyether-type polyurethane resin emulsion with a solid content of 40%, cationic quick-breaking emulsifier and water, where the solid content of SBR latex is 40%, and the mass percentages of the above components are shown in Table 1.

[0061] Prepare component B polymer composite emulsion with the following raw materials: non-ionic organosilicon monomer emulsion with a solid content of 40%, polyethylene wax emulsion with a solid content of 40% and water, and the mass percentages of the above components are shown in Table 2.

[0062] The specific preparation method of the reaction-type non-stick wheel interlayer binder is as follows:

[0063] S1. Prepare modified asphalt: First, heat the base asphalt to a flowing state and pour it into a stirring container, adjust the shear rate to 3800 r / min, then adjust the temperature to 180 °C, and sequentially add SBS modifier, nano calcium carbonate, C9 petroleum resin and extracted oil, shear and stir for 3.5 h in total, and keep it at a temperature of 165 °C for heat development for 1.5 h to obtain modified asphalt;

[0064] S2. Add the soap solution composed of a cationic quick-breaking emulsifier, SBR latex, polyether-type polyurethane resin emulsion and water in accordance with the ratio into a colloid mill emulsifier. Control the temperature of the soap solution at 60 °C. After circulating and shearing for 2 min, add the modified asphalt prepared in S1 according to a certain ratio and grind and emulsify it. The shearing rate of the colloid mill emulsifier is 3900 r / min, and the shearing time is 3 min to obtain the A-component modified asphalt emulsion;

[0065] S3. Prepare a polymer composite emulsion: Add a polyethylene wax emulsion and a non-ionic silicone monomer type emulsion into water and stir evenly. The stirring rate is 450 r / min, and the stirring time is 4 min to obtain the B-component polymer composite emulsion.

[0066] Example 2

[0067] Prepare the A-component modified asphalt emulsion with the following raw materials: 70# SK base asphalt, SBS modifier, C9 petroleum resin, nano calcium carbonate, extracted oil, SBR latex, cationic quick-breaking emulsifier and water. The solid content of the SBR latex is 60%. The mass percentages of the above components are shown in Table 1.

[0068] Prepare the B-component polymer composite emulsion with the following raw materials: a polyethylene wax emulsion with a solid content of 40%, an organosilicon-modified styrene-acrylic emulsion with a solid content of 42%, a silicone monomer type emulsion and water. The mass percentages of the above components are shown in Table 2.

[0069] The specific preparation method of the reactive non-stick wheel interlayer binder is as follows:

[0070] S1. Prepare modified asphalt: First, heat the base asphalt to a flowing state and pour it into a stirring container. Adjust the shearing rate to 3800 r / min, then adjust the temperature to 180 °C, and successively add the SBS modifier, nano calcium carbonate, C9 petroleum resin and extracted oil, shear and stir for 3.5 h in total, and keep it at a temperature of 165 °C for heat development for 1.5 h to obtain the modified asphalt;

[0071] S2. Add the soap solution composed of a cationic quick-breaking emulsifier, SBR latex and water in accordance with the ratio into a colloid mill emulsifier. Control the temperature of the soap solution at 60 °C. After circulating and shearing for 2 min, add the modified asphalt prepared in S1 according to a certain ratio and grind and emulsify it. The shearing rate of the colloid mill emulsifier is 3900 r / min, and the shearing time is 3 min to obtain the A-component modified asphalt emulsion;

[0072] S3. Prepare a polymer composite emulsion: Add a polyethylene wax emulsion, a silicone monomer type emulsion and an organosilicon-modified styrene-acrylic emulsion into water and stir evenly. The stirring rate is 450 r / min, and the stirring time is 4 min to obtain the B-component polymer composite emulsion.

[0073] Example 3

[0074] The A-component modified asphalt emulsion was prepared with the following raw materials: 70# SK base asphalt, SBS modifier, petroleum resin, nano-calcium carbonate, extracted oil, SBR latex, cationic quick-setting emulsifier, and water. The solid content of the SBR latex was 40%. The mass percentages of the above components are shown in Table 1.

[0075] The B-component polymer composite emulsion was prepared with the following raw materials: polyethylene wax emulsion with a solid content of 40%, organosilicon-modified styrene-acrylic emulsion with a solid content of 42%, and water. The mass percentages of the above components are shown in Table 2.

[0076] The specific preparation method of the reactive non-stick wheel interlayer binder is as follows:

[0077] S1. Prepare the modified asphalt: First, heat the base asphalt to a flowing state and pour it into a stirring container. Adjust the shear rate to 3800 r / min, then adjust the temperature to 180 °C, and sequentially add the SBS modifier, nano-calcium carbonate, petroleum resin, and extracted oil. Shear and stir for 3.5 h in total, and keep it at 165 °C for heat development for 1.5 h to obtain the modified asphalt.

[0078] S2. Add the soap solution composed of the cationic quick-setting emulsifier, SBR latex, and water to a colloid mill emulsifier. Control the temperature of the soap solution at 60 °C. After circulating and shearing for 2 min, then add the modified asphalt prepared in S1 in a certain proportion and grind and emulsify it. The shear rate of the colloid mill emulsifier is 3900 r / min, and the shear time is 3 min to obtain the A-component modified asphalt emulsion.

[0079] S3. Prepare the polymer composite emulsion: Add the polyethylene wax emulsion and the organosilicon-modified styrene-acrylic emulsion to water and stir evenly. The stirring rate is 450 r / min, and the stirring time is 4 min to obtain the B-component polymer composite emulsion.

[0080] Example 4

[0081] The A-component modified asphalt emulsion was prepared with the following raw materials: 70# Esso base asphalt, SBS modifier, C9 petroleum resin, nano-calcium carbonate, extracted oil, SBR latex, silicon-modified polyurethane emulsion with a solid content of 50%, cationic quick-setting emulsifier, and water. The solid content of the SBR latex was 60%. The mass percentages of the above components are shown in Table 1.

[0082] The B-component polymer composite emulsion was prepared with the following raw materials: polyethylene wax emulsion with a solid content of 40% and water. The mass percentages of the above components are shown in Table 2.

[0083] The specific preparation method of the reactive non-stick wheel interlayer binder is as follows:

[0084] S1. Preparation of modified asphalt: First, heat the base asphalt to a flowing state and pour it into a stirring container. Adjust the shear rate to 3800 r / min, then adjust the temperature to 180 °C, and sequentially add SBS modifier, nano calcium carbonate, C9 petroleum resin, and extracted oil. Shear and stir for 3.5 h in total, and keep it warm and develop for 1.5 h at a temperature of 165 °C to obtain modified asphalt;

[0085] S2. Add the soap solution composed of cationic quick-breaking emulsifier, SBR latex, silicone-modified polyurethane emulsion, and water in proportion to a colloid mill emulsifier. Control the temperature of the soap solution at 60 °C. After circulating and shearing for 2 min, add the modified asphalt prepared in S1 in a certain proportion and grind and emulsify it. The shear rate of the colloid mill emulsifier is 3900 r / min, and the shear time is 3 min to obtain Component A modified asphalt emulsion;

[0086] S3. Prepare polymer composite emulsion: Add polyethylene wax emulsion to water, stir evenly, with a stirring rate of 450 r / min and a stirring time of 4 min to obtain Component B polymer composite emulsion.

[0087] Table 1 Composition and mass percentage of each component of Component A modified asphalt emulsion

[0088]

[0089] Table 2 Composition and mass percentage of each component of Component B polymer composite emulsion

[0090]

[0091] Test Example 1

[0092] Perform non-stick wheel performance tests on the reactive non-stick wheel interlayer binder prepared in each of the above examples. The specific test steps are as follows: (1) Mold standard Marshall specimens with a grading of AC-13 (size: 101.6 mm × 63.5 mm). After it cools and forms, bond one side with an acrylic resin glue and a pull-out test indenter, and sprinkle the reactive non-stick wheel interlayer binder to be tested on the other side (spray the reactive non-stick wheel interlayer binder on the standard Marshall specimen, the spraying amount of Component A is 0.5 kg / m 2 , and the spraying amount of Component B is 0.18 kg / m 2; The surface drying time is 10 min), which will be used to simulate the road surface; (2) Another drawing test indenter and the rubber pad are bonded with acrylic resin, which will be used to simulate the tire; (3) After the reaction-type non-stick wheel interlayer binder breaks the emulsion and the acrylic resin glue cures, place the drawing test indenter and the attached specimen in (1) in an environment of 50 °C and keep it warm for 2 h; (4) Use a universal testing machine to combine the two drawing test indenters and their attached specimens into one specimen, apply a pressure of 0.8 MPa to the combined specimen, and perform a drawing test after pressure relief to separate the test indenter with the rubber pad and the test indenter with the Marshall specimen, and measure its drawing strength. Each group of specimens shall have no less than 3. In addition, to verify that when it is used as a tack coat, its bonding effect is not limited, select the reaction-type non-stick wheel interlayer binder prepared in Example 2 and a commercially available high-viscosity emulsified asphalt, use the same test method, keep it in an environment of 75 °C for 4 h, and measure its drawing strength. Each group of specimens shall have no less than 3.

[0093] Take 5 binders including those in Examples 1 to 4 and the high-viscosity emulsified asphalt in the comparative example, and conduct the non-stick wheel property test according to the above method. For the same specimen, at least 3 parallel tests are carried out. When the difference between the results of two tests is not more than 5%, take the average value as the test result. The results are shown in Table 3.

[0094] Table 3 Peak drawing strength of different binders

[0095]

[0096] As can be seen from Table 3, the binder added with the B-component polymer composite emulsion has a lower drawing strength compared with the specimen sprayed with the high-viscosity emulsified asphalt, indicating that only a small force is required to separate the two simulated specimens, that is, the reaction-type non-stick wheel interlayer binder prepared by the present invention has an excellent non-stick wheel effect. In addition, by testing its bonding effect by increasing the ambient temperature, it is found that its bonding strength can still be better exerted, and even the bonding performance is better than that of the high-viscosity emulsified asphalt.

[0097] Test Example 2

[0098] To verify the most recommended surface drying time of the reaction-type non-stick wheel interlayer binder during construction, select the reaction-type non-stick wheel interlayer binder prepared in Example 2, and the spraying amount of component A is determined to be 0.5 kg / m 2 , and the spraying amounts of component B are shown in Table 4. Adopt the construction method of spraying component A and component B evenly in sequence, and spray on the cement road surface at 45 °C, observe and record the surface drying time after breaking the emulsion, and the test results are shown in Table 4.

[0099] Table 4 Surface drying time and spraying amount on the cement road surface

[0100]

[0101] As can be seen from Table 4, with the reasonable combination of the spreading amounts of Component A and Component B, the reactive non-stick wheel interlayer binder can quickly reach the demulsification surface dry state in 10 minutes, play its non-stick role, and greatly improve the construction efficiency.

[0102] The present invention utilizes the different acid-base properties of the stable environments of the high molecular composite emulsion of Component B and the modified asphalt emulsion of Component A. After contact, the demulsification rate of the two-component emulsion will increase, and then an isolation interface will be formed. The interface barrier effect inhibits the sticking of the demulsified emulsified asphalt to the wheel at low temperature, normal temperature and medium temperature (below 60°C), while the interface barrier effect is eliminated when the construction temperature is above 110°C, which can improve the bonding performance and can be applied to the interlayer of road surfaces such as asphalt layer and asphalt layer, asphalt layer and cement pavement.

[0103] For the reactive non-stick wheel interlayer binder prepared by the present invention, from the results of the pull-out test, it can be seen that its bonding performance is stable and excellent. This is because the polyethylene wax emulsion after demulsification melts when paving hot asphalt mixture and quickly combines with asphalt. Due to its good compatibility with asphalt, it can significantly improve the performance of the tack coat; the preparation process is simple, there is no need to adjust the acid and add stabilizers during the preparation process, and the test equipment only involves a stirring shear machine and a colloid mill, and there are no high requirements for mechanical equipment; the construction method is efficient and convenient. By adopting the construction method of spraying Component A and Component B successively, its spraying equipment only needs to have the function of metering spraying, and there is no need for heating equipment, and the equipment combination is simple. Therefore, the reactive non-stick wheel interlayer binder prepared by the present invention is a new type of road material with good development prospects and high cost performance.

[0104] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A reactive non-stick wheel interlayer binder, which is independently packaged into component A and component B; the mass ratio of component A to component B is 1-6:1; the solid content of component B is 5-40%; By mass fraction, component A is: 40-60% of matrix asphalt, 3-5% of solid modifier, 2-6% of liquid modifier, 0.7-1.5% of emulsifier, 30-50% of water and 1.5-2% of extracted oil; By mass fraction, component B is: 0-5% of silicone-based emulsion, 5-10% of polyethylene wax-based emulsion, 0-5% of special monomer, 85-95% of water, and the mass fractions of silicone-based emulsion and special monomer are not 0; The reactive non-stick wheel interlayer binder does not include stabilizers and acid-base regulators; The solid modifier in component A is a mixture of SBS modifier, petroleum resin and nano calcium carbonate; the mass ratio of SBS modifier, petroleum resin and nano calcium carbonate is 40-70:15-35:25-40; The liquid modifier in component A is one or both of SBR latex and modified polyurethane resin-based emulsion; The emulsifier in component A is a cationic fast-breaking emulsifier; the pH value of the 1wt% aqueous solution of the emulsifier is 3-7; The silicone-based emulsion in component B includes any one of silicone ketone polymer emulsion and silicone monomer-based emulsion; The polyethylene wax-based emulsion in component B includes any one of oxidized polyethylene wax emulsion and polyethylene wax emulsion; The special monomer in component B is silicone-modified styrene-acrylic emulsion.

2. The preparation method of the reactive non-stick wheel interlayer binder according to claim 1, comprising the following steps: Heat the matrix asphalt to obtain molten asphalt; Mix the molten asphalt and the solid modifier and carry out development to obtain modified asphalt; Mix the modified asphalt with the liquid modifier, emulsifier, extracted oil and water to obtain component A; Mix the silicone-based emulsion, polyethylene wax-based emulsion, special monomer and water to obtain component B.

3. The application of the reactive non-stick wheel interlayer binder according to claim 1 or the reactive non-stick wheel interlayer binder prepared by the preparation method according to claim 2 in the road surface interlayer.

4. The application according to claim 3, characterized in that The application includes the following steps: sequentially spray component A and component B on the road surface interlayer.

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