Bulk granular colored pouring type asphalt mixture and preparation method thereof

Abstract

The invention provides a granular colored pouring type asphalt mixture and a preparation method thereof, and belongs to the technical field of road building materials. The granular colored pouring type asphalt mixture comprises the following components in parts by weight: 8-12 parts of toner particles, 2-4 parts of elastomer particles, 0.1-0.3 part of plastic particles, 0.1-0.4 part of solid epoxy resin particles and 84-90 parts of stone particles, wherein the toner particles comprise the following raw materials in parts by weight: 40-50 parts of resin, 30-40 parts of toner, 10-30 parts of first oil, 2-4 parts of a viscosity reducer, 1-3 parts of a first flame retardant and 0.05-0.15 part of a dispersing agent; the elastomer particles comprise the following raw materials in parts by weight: 20-40 parts of thermoplastic elastomer, 50-70 parts of second oil powder, 2-10 parts of curing agent and 5-15 parts of second flame retardant. The colored pouring asphalt mixture can become a flowing colored pouring asphalt mixture after being heated by mechanical equipment, and can be suitable for pavement paving of roadways.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of road construction materials, and particularly relates to a granular color paving asphalt mixture and a preparation method thereof. BACKGROUND

[0002] The paving asphalt mixture is a self-leveling asphalt mixture without rolling, which originated in Germany and has the following advantages: (1) no void, impermeable to water, protecting the safety of the bridge structure while preventing the effects of light, oxygen and water, and almost no aging and freeze-thaw problems; (2) the mixture temperature is above 200 DEG C, and there is no special requirement for the environmental conditions on site, plus no rolling is needed, so the performance in the laboratory can be fully exhibited in the entity engineering; (3) the asphalt content is high, the material has good toughness, good fatigue resistance and durability, and good follow-up of the deformation of the base layer, and the service life is expected to be more than 20 years. Therefore, the paving asphalt mixture is widely used in the vehicle lane and the sidewalk in the steel bridge deck pavement field. When the paving asphalt mixture is used in the sidewalk, due to the requirements of the current road landscape and functionality, a color thin layer pavement is often added on it, so that the black paving asphalt mixture becomes a color pavement. This method not only increases the construction process, but also increases the construction cost. SUMMARY

[0003] In view of the above problems, the present application provides a granular color paving asphalt mixture and a preparation method thereof. The granular color paving asphalt mixture has rich colors itself, and the granular mixture can become a flowable color paving asphalt mixture after being heated by mechanical equipment on site, has the corresponding advantages of the paving asphalt mixture, can expand the application scenarios of the paving asphalt mixture, and can be applied not only to the bridge deck pavement, but also to the color pavement in the fields of urban overpass, park road and landscape road.

[0004] One of the purposes of the present application is to provide a granular color paving asphalt mixture.

[0005] The second purpose of the present application is to provide a preparation method of the granular color paving asphalt mixture.

[0006] In order to achieve the above purposes of the present application, the following technical solutions are adopted:

[0007] In the first aspect, the present application provides a granular color paving asphalt mixture, which comprises the following components in parts by weight: color powder particles 8-12 parts, elastomer particles 2-4 parts, plastic particles 0.1-0.3 parts, solid epoxy resin particles 0.1-0.4 parts, and stone particles 84-90 parts.

[0008] The toner particles are prepared from the following raw materials by weight: resin 40-50 parts, toner 30-40 parts, first oil 10-30 parts, viscosity reducer 2-4 parts, first flame retardant 1-3 parts, dispersant 0.05-0.15 parts;

[0009] The elastomer particles are prepared from the following raw materials by weight: thermoplastic elastomer 20-40 parts, second oil 50-70 parts, curing agent 2-10 parts, second flame retardant 5-15 parts;

[0010] The solid epoxy resin particles are prepared from the following raw materials by weight: solid epoxy resin 50-70 parts, white oil paste 20-40 parts, glycerol fatty acid ester 5-15 parts.

[0011] The following components are described in detail:

[0012] Toner particles:

[0013] The toner particles are prepared from the following raw materials by weight: resin 40-50 parts, toner 30-40 parts, first oil 10-30 parts, viscosity reducer 2-4 parts, first flame retardant 1-3 parts, dispersant 0.05-0.15 parts.

[0014] Preferably, the resin is a solid resin, which is a mixture of one or more selected from petroleum resin, hydrogenated petroleum resin, phenolic resin, terpene resin, rosin modified maleic acid resin, coumarone resin, preferably a mixture of one or more selected from petroleum resin, coumarone resin and terpene resin.

[0015] Preferably, the toner is a mixture of one or more selected from red iron oxide, iron blue, iron green, iron black, iron yellow, medium chrome yellow, lemon yellow, titanium white.

[0016] Preferably, the first oil is a mixture of one or more selected from naphthenic oil, aromatic oil, extracted oil, reduced three-line oil, reduced two-line oil, preferably one selected from naphthenic oil, aromatic oil, extracted oil and reduced three-line oil.

[0017] Preferably, the viscosity reducer is one selected from fee wax, polyethylene wax, polypropylene wax and polyamide wax, preferably fee wax or polyethylene wax with a dropping point of 100-140°C.

[0018] Preferably, the first flame retardant is one or more mixture selected from aluminum dihydrogen phosphate, triphenyl phosphite, melamine, dipentaerythritol, ammonium polyphosphate.

[0019] Preferably, the dispersant is one selected from Solplus DP310, BYK966, Dispersogen 1728, BYK190, BYK1142, BYK Disperplast-1142, VOK-W 9010.

[0020] The toner particles are added in an amount of 8 to 12 parts, for example, 8 parts, 10 parts, 12 parts, but not limited thereto.

[0021] Elastomer particles:

[0022] The elastomer particles are prepared from the following raw materials in parts by weight: thermoplastic elastomer 20 to 40 parts, for example, 20, 22, 24, 25, 26, 28, 30, 32, 34, 35, 36, 38, 40 parts, etc.; second oil 50 to 70 parts, for example, 50, 52, 54, 55, 56, 58, 60, 62, 64, 65, 66, 68, 70 parts, etc.; curing agent 2 to 10 parts, for example, 2, 6, 8, 10 parts, etc.; second flame retardant 5 to 15 parts, for example, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15 parts, etc.

[0023] Preferably, the thermoplastic elastomer is a styrene-based elastomer, which is one or more mixture selected from SBS, SIS and SEBS, preferably one or two mixture selected from SBS and SEBS.

[0024] Preferably, the second oil is one or more mixture selected from naphthenic oil, reduced distillate oil, white oil and hydrocracking cycle oil, preferably one or two mixture selected from naphthenic oil and hydrocracking cycle oil.

[0025] Preferably, the curing agent is a long-chain amine curing agent, which is one or more mixture selected from oleic acid diethanolamide, dodecyl primary amine, octadecylamine, coconut alkyl primary amine.

[0026] Preferably, the second flame retardant is one or more mixture selected from aluminum dihydrogen phosphate, triphenyl phosphite, melamine, dipentaerythritol, ammonium polyphosphate.

[0027] The elastomer particles are added in an amount of 2 to 4 parts, for example, 2 parts, 3 parts, 4 parts, but not limited thereto.

[0028] Plastic particles:

[0029] The plastic particles are low density polyethylene, and are selected from one of linear low density polyethylene, high density polyethylene, polypropylene.

[0030] The amount of the plastic particles added is 0.1 to 0.3 parts, and for example, can be 0.1 part, 0.2 part, 0.3 part, but is not limited thereto.

[0031] The solid epoxy resin particles:

[0032] The solid epoxy resin particles are prepared from the following raw materials in parts by weight: solid epoxy resin 50 to 70 parts, for example, 50, 52, 54, 55, 56, 58, 60, 62, 65, 66, 68, 70 parts, etc.; white oil paste 20 to 40 parts, for example, 20, 22, 24, 25, 26, 28, 30, 32, 34, 35, 36, 38, 40 parts, etc.; glycerol fatty acid ester 5 to 15 parts, for example, 5, 6, 7, 8, 10, 12, 14, 15 parts, etc.

[0033] The solid epoxy resin is a solid epoxy resin having a softening point of 80°C or higher.

[0034] The glycerol fatty acid ester is selected from one of acetylated monoglycerol fatty acid ester, polyglycerol fatty acid ester, mono-diglycerol fatty acid.

[0035] The amount of the solid epoxy resin particles added is 0.1 to 0.4 parts.

[0036] The stone particles:

[0037] The stone particles are composed of stone particles having a maximum particle size of 13.2 mm or less, and the percentage of each particle size is as follows:

[0038] 9.5 (not included) to 13.2 mm (included) stone 0 to 22%, 4.75 (not included) to 9.5 mm (included) stone 17 to 20%, 2.36 (not included) to 4.75 mm (included) stone 15 to 18%, 1.18 (not included) to 2.36 mm (included) stone 10 to 12%, 0.6 (not included) to 1.18 mm (included) stone 5 to 7%, 0.3 (not included) to 0.6 mm (included) stone 5 to 7%, 0.15 (not included) to 0.3 mm (included) stone 3 to 5%, 0.075 (not included) to 0.15 mm (included) stone 4 to 7%, and stone powder of 0.075 mm or less 15 to 28%.

[0039] Preferably, the stone of 0.075 mm or more is selected from one of basalt, limestone, quartz sand, diabase, and calcined ceramic particles.

[0040] Preferably, the stone powder below 0.075 mm is one selected from limestone powder, heavy calcium carbonate, mica powder, and precipitated barium sulfate, and the particle size is greater than or equal to 0.023 mm.

[0041] The amount of the stone particles is 84-90 parts, for example, 84 parts, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, or 90 parts, but is not limited thereto.

[0042] The present application obtains the granular paving mixture by pre-preparing the toner particles, the elastomer particles, the plastic particles, and the solid epoxy resin particles; the toner and the elastomer particles are crosslinked in the molten state at high temperature to provide the basic bonding performance, high-temperature performance, and low-temperature performance; the addition of the plastic particles can further optimize the high-temperature resistance of the mixture; the solid epoxy resin particles react with the curing agent in the elastomer particles at high temperature to further improve the bonding capacity and high-temperature performance of the molten binder and the stone; the white oil paste in the epoxy resin particles can provide the plasticizing effect, and the free sulfur in the white oil paste can promote the vulcanization of the elastomer to further improve the strength of the binder; the graded stone particles provide the skeleton support capacity of the mixture; and the addition of the flame-retardant component can provide the flame-retardant performance of the mixture.

[0043] In the second aspect, the present application provides a preparation method of the above granular colored paving mixture, comprising the following steps:

[0044] 1) Preparation of toner particles:

[0045] The resin, the first oil, and the viscosity reducer are mixed uniformly at room temperature by a stirrer, and then the toner, the first flame retardant, and the dispersant are added and mixed uniformly; the uniformly mixed mixture is put into an extruding granulator, the heating temperature is controlled at 150-190°C, the extruding granulation is performed to form spherical particles, and the particles are dried for standby;

[0046] 2) Preparation of elastomer particles:

[0047] The thermoplastic elastomer, the curing agent, and the second oil are mixed uniformly at room temperature by a stirrer, and then the second flame retardant is added and mixed uniformly after standing for 1-3 hours; the uniformly mixed mixture is put into an extruding granulator, the heating temperature is controlled at 160-200°C, the extruding granulation is performed to form cylindrical particles, and the particles are dried for standby;

[0048] 3) Preparation of solid epoxy resin particles:

[0049] The solid epoxy resin, the white oil paste, and the glycerol fatty acid ester are mixed uniformly at room temperature by a stirrer, the heating temperature is controlled at 120-160°C, the extruding granulation is performed to form cylindrical particles, and the particles are dried for standby;

[0050] 4) Preparation of the granular colored paving mixture:

[0051] The water in the stone particles is dried and cooled for standby; at normal temperature, the color powder particles, elastomer particles, plastic particles and solid epoxy resin particles are mixed with the stone powder below 0.075 mm in the stone particles by a large dispersing machine, and then other stone particles are mixed uniformly; finally, the mixed granular color paving asphalt mixture is packed.

[0052] The granular color paving asphalt mixture can be packed into bags of 50 kg, 1 ton or other specifications according to needs.

[0053] When used, the granular color paving asphalt mixture with calculated weight is put into a stirring device, heated to 200-240℃, stirred uniformly, and then the construction can be started when the mixture is in a flowable state at high temperature.

[0054] Beneficial effects:

[0055] (1) The paving asphalt mixture of the present application has rich colors, realizing the colorization of the paving asphalt pavement;

[0056] (2) In the present application, the use of epoxy resin and curing agent, the addition of white oil paste and plastic particles can improve the strength of the mixture, so that the color paving mixture is not only suitable for the paving of pedestrian pavement, but also suitable for the paving of vehicle pavement;

[0057] (3) The color paving mixture of the present application is simple to construct, which is a granular material before heating, and does not need to add asphalt or stone when used, nor needs to design the mixture ratio, the material amount is calculated directly by the construction area and thickness, and then the corresponding material amount is put into a mechanical stirring device to prepare the color paving mixture by heating and stirring (heating temperature is 200-240℃);

[0058] (4) The color paving mixture of the present application contains a flame retardant, which can realize the flame retardant performance of the binder in the color paving asphalt mixture, and can also be used in the field of tunnel pavement with flame retardant requirements.

[0059] The present application has been described in detail in the foregoing, but the above-mentioned embodiments are only illustrative in nature and are not intended to limit the present application. In addition, the present application is not limited by any theory described in the foregoing prior art or summary of the invention or in the following examples. DETAILED DESCRIPTION

[0060] The present application will be further described below in conjunction with examples, and it should be noted that the following examples are provided only for illustrative purposes and do not constitute a limitation on the scope of protection of the present application.

[0061] Unless otherwise specified, the raw materials, reagents, methods and the like used in the examples are conventional raw materials, reagents and methods in the art.

[0062] C9 petroleum resin PR110-11 from Henghe Material Technology Co., Ltd., C5 petroleum resin YH-1288 from Henghe Material Technology Co., Ltd., C5 modified C9 petroleum resin G-120M from Shandong Qilong Chemical Co., Ltd., solid epoxy resin from Nanya NPES-902, NPES-904, coumarone resin from Shandong Jingshun Chemical Co., Ltd., terpene resin from Ganzhou Taipu Chemical Co., Ltd. TP1115, reduced three-line oil from Yunnan Petrochemical Co., Ltd., hydrogenated cracking cycle oil, extract oil from Foshan Gafu Petrochemical Co., Ltd., naphthenic oil from Karamay KN4010, oleic acid diethanolamide from Haian Petrochemical Factory, dodecyl primary amine from Nantong Runfeng Petrochemical Co., Ltd., triphenyl phosphite from Qingdao Changrong Chemical Co., Ltd., fee wax sasobit from Sasol Company of South Africa, fee wax YT110 from Inner Mongolia Yitai Coal Co., Ltd., SBS791-H from Sinopec Yueyang Petrochemical, SBS6302 from PetroChina Dushanzi Petrochemical, SEBS1652 from Kraton, linear low density polyethylene DFDA-7540 from Dow, high density polyethylene DMDA 8008 from PetroChina Dushanzi Petrochemical, polyethylene wax RF-1000 from Honeywell, VOK-W 9010 from Germany Voker, BYK1142 from Germany BYK, Dispersogen 1728 from Clariant, mono and diglycerol fatty acid ester from Calsil Additives (Haian) Co., Ltd., polyglycerol fatty acid ester from Zhengzhou Dahe Foodstuff Technology Co., Ltd., white oil paste from Guangzhou Liben Rubber Raw Material Co., Ltd., limestone and limestone powder from Chongqing Chongjiao Renewable Resources Development Co., Ltd., diabase stone from Dahuazonghai Diabase Stone Co., Ltd., quartz sand from Chongqing Rongshun Mineral Products Co., Ltd.

[0063] Example 1

[0064] 1) Preparation of toner particles:

[0065] Petroleum resin C9 PR110-11 35 parts, petroleum resin C5 YH-1288 14.4 parts, naphthenic oil 15 parts and fee wax sasobit 2.8 parts were mixed uniformly at room temperature with a stirrer, and then iron oxide red color powder 30.9 parts, triphenyl phosphite 1.9 parts and VOK-W 9010 0.1 part were added and mixed uniformly. The uniformly mixed mixture was put into an extrusion granulator, the heating temperature was controlled at 150-190°C, and the extruded and cooled mixture was cut into spherical particles, which were dried for standby use.

[0066] 8.6 parts of toner particles were taken for standby use.

[0067] 2) Preparation of elastomer particles:

[0068] SBS791-H 30.6 parts, oleic acid diethanolamide 3.5 parts, naphthenic oil 58.8 parts were mixed uniformly at room temperature with a mixer, and after standing for 1-3 h, triphenyl phosphite 7.1 parts was added and mixed uniformly. The uniformly mixed mixture was put into an extrusion granulator, the heating temperature was controlled at 160-200 °C, and the extruded and cooled mixture was cut into cylindrical particles, which were dried for later use.

[0069] Take 3.4 parts of elastomer particles for later use.

[0070] 3) Preparation of solid epoxy resin particles:

[0071] Solid epoxy resin NPES-904 50 parts, white oil paste 37.5 parts, and mono-diglyceride fatty acid ester 12.5 parts were mixed uniformly at room temperature with a mixer, the heating temperature was controlled at 120-160 °C, and the mixture was extruded and granulated into cylindrical particles, which were dried for later use.

[0072] Take 0.3 parts of solid epoxy resin particles for later use.

[0073] 4) Preparation of granular colored paving asphalt mixture:

[0074] The stone particles with a weight of 87.5 parts were dried and cooled for later use, wherein 9.5-13.2 mm stone 9.0 parts, 4.75-9.5 mm stone 16.8 parts, 2.36-4.75 mm stone 14.5 parts, 1.18-2.36 mm stone 9.3 parts, 0.6-1.18 mm stone 5.5 parts, 0.3-0.6 mm stone 5.0 parts, 0.15-0.3 mm stone 3.2 parts, 0.075-0.15 mm stone 4.5 parts, and 0.075 mm or less stone powder 19.7 parts. The stone with a size of 0.075 mm or more was limestone, and the stone powder with a size of 0.075 mm or less was limestone powder.

[0075] At room temperature, the above pigment particles 8.6 parts, elastomer particles 3.4 parts, linear low-density polyethylene DFDA-7540 0.2 parts, and solid epoxy resin particles 0.3 parts were mixed uniformly with the stone powder with a size of 0.075 mm or less 19.7 parts using a large disperser, and then the mixture was put into the other stone particles with a size of 0.075 mm or more 67.8 parts to mix uniformly. The mixed granular colored paving asphalt mixture was packed.

[0076] Example 2

[0077] 1) Preparation of pigment particles:

[0078] Mix petroleum resin C9PR110-1126 parts, C5 modified C9 petroleum resin G-120M 14 parts, VGO 10 parts, naphthenic oil 7 parts and Feituo wax YT110 3.0 parts uniformly at room temperature with a stirrer, then add iron oxide green powder 17 parts, titanium dioxide 20 parts, melamine 1.0 part, dipentaerythritol 1.0 part, ammonium polyphosphate 1.0 part and BYK1142 0.1 part and mix uniformly. Put the uniformly mixed mixture into an extrusion granulator, control the heating temperature at 150-190°C, extrude, cool and cut into spherical particles, and dry for standby.

[0079] Take 11.2 parts of toner particles for standby.

[0080] 2) Preparation of elastomer particles:

[0081] Mix SBS6302 27 parts, naphthenic oil 57.6 parts, hydrocracking cycle oil 1.9 parts and dodecyl primary amine 8.1 parts uniformly at room temperature with a stirrer, stand for 1-3 h, then add melamine 1.8 parts, dipentaerythritol 1.8 parts and ammonium polyphosphate 1.8 parts and mix uniformly. Put the uniformly mixed mixture into an extrusion granulator, control the heating temperature at 160-200°C, extrude, cool and cut into cylindrical particles, and dry for standby.

[0082] Take 3.1 parts of elastomer particles for standby.

[0083] 3) Preparation of solid epoxy resin particles:

[0084] Mix solid epoxy resin NPES-902 66.7 parts, white oil paste 26.6 parts and mono-diglyceride fatty acid ester 6.7 parts uniformly at room temperature with a stirrer, control the heating temperature at 120-160°C, extrude and granulate into cylindrical particles, and dry for standby.

[0085] Take 0.6 parts of solid epoxy resin particles for standby.

[0086] 4) Preparation of granular colored paving asphalt mixture

[0087] Dry and cool 85.0 parts of stone particles for standby, wherein 0 parts of 9.5-13.2 mm stone, 18.0 parts of 4.75-9.5 mm stone, 15.2 parts of 2.36-4.75 mm stone, 9.6 parts of 1.18-2.36 mm stone, 5.4 parts of 0.6-1.18 mm stone, 5.4 parts of 0.3-0.6 mm stone, 3.6 parts of 0.15-0.3 mm stone, 5.4 parts of 0.075-0.15 mm stone and 22.4 parts of stone powder below 0.075 mm. The stone above 0.075 mm is diabase, and the stone powder below 0.075 mm is heavy calcium carbonate.

[0088] At room temperature, the above color powder particles 11.2 parts, elastomer particles 3.1 parts, linear low density polyethylene DFDA-7540 0.1 parts, solid epoxy resin particles 0.6 parts, and stone powder below 0.075 mm 22.4 parts are mixed uniformly with the stone particles, and then the other stone particles with a total of 62.6 parts are mixed uniformly. The mixed granular colored paving asphalt mixture is packaged.

[0089] Example 3

[0090] 1) Preparation of color powder particles:

[0091] The petroleum resin C9PR110-11 24.3 parts, coumarone resin 10.0 parts, terpene resin 8 parts, naphthenic oil 20 parts, extract oil 3.1 parts, and polyethylene wax RF-1000 2.3 parts are mixed uniformly at room temperature with a stirrer, and then the middle chrome yellow powder 30.7 parts, triphenyl phosphite 1.5 parts, and Dispersogen 1728 0.1 parts are mixed uniformly. The mixed mixture is put into an extrusion granulator, the heating temperature is controlled at 150-190°C, and the extruded and cooled particles are cut into spherical particles, which are dried for standby.

[0092] Take 9.2 parts of color powder particles for standby.

[0093] 2) Preparation of elastomer particles:

[0094] The SBS6302 29.4 parts, SEBS1652 5.9 parts, naphthenic oil 28 parts, and hydrogenated cracked cycle oil 22 parts, oleic acid diethanol amide 0.5 parts, dodecyl primary amine 2.4 parts are mixed uniformly at room temperature with a stirrer, and then triphenyl phosphite 11.8 parts is added after standing for 1-3 h. The mixed mixture is put into an extrusion granulator, the heating temperature is controlled at 160-200°C, and the extruded and cooled particles are cut into cylindrical particles, which are dried for standby.

[0095] Take 2.4 parts of elastomer particles for standby.

[0096] 3) Preparation of solid epoxy resin particles:

[0097] The solid epoxy resin NPES-904 60.6 parts, white oil paste 30.3 parts, and polyglycerol fatty acid ester 9.1 parts are mixed uniformly at room temperature with a stirrer, and the heating temperature is controlled at 120-160°C, and the extruded and granulated particles are cut into cylindrical particles, which are dried for standby.

[0098] Take 0.2 parts of solid epoxy resin particles for standby.

[0099] 4) Preparation of granular colored paving asphalt mixture

[0100] The weight and 88.0 parts of stone particles are dried and cooled for standby use, wherein 9.5-13.2 mm stone 18.2 parts, 4.75-9.5 mm stone 15.5 parts, 2.36-4.75 mm stone 13.7 parts, 1.18-2.36 mm stone 9.1 parts, 0.6-1.18 mm stone 5.5 parts, 0.3-0.6 mm stone 4.6 parts, 0.15-0.3 mm stone 2.7 parts, 0.075-0.15 mm stone 3.7 parts, and 0.075 mm or less stone powder 15.0 parts. The stone of 0.075 mm or more is quartz sand, and the stone powder of 0.075 mm or less is precipitated barium sulfate.

[0101] At room temperature, the above color powder particles 9.2 parts, elastomer particles 2.4 parts, high-density polyethylene DMDA-8008 0.2 parts, solid epoxy resin particles 0.2 parts are first mixed with 15.0 parts of stone powder of 0.075 mm or less in the stone particle, and then 73.0 parts of other particle size stone particles are mixed uniformly, and the mixed granular colored paving asphalt mixture is packaged.

[0102] Comparative Example 1 is LT-70# decolorized asphalt produced by Shenzhen Lute New Material Technology Co., Ltd. The decolorized asphalt is heated to 170-180°C and added to the stone together with the mineral powder. The same stone as in Example 1 (plus 3% iron oxide red powder relative to the stone) is used to prepare the colored paving asphalt mixture.

[0103] Comparative Example 2 differs from Example 1 in that no solid epoxy resin particles are added.

[0104] Comparative Example 3 differs from Example 1 in that step 3) does not contain white oil paste.

[0105] The granular colored paving asphalt mixture prepared in Examples 1-3 and Comparative Examples 2-3 is tested for performance. The granular colored paving asphalt mixture is put into a stirring device and heated to 200-240°C, and then stirred uniformly for sampling and testing. The flowability, penetration, and penetration increment are tested according to the test methods in Appendix G and Appendix J of “Technical Specification for Design and Construction of Highway Steel Bridge Deck Pavement” (JTG T3364-02-2019); the low-temperature bending strain at -10°C is tested according to the test method in T0715 of “Standard Test Methods for Highway Engineering Asphalt and Concrete Mixture” (JTG E20-2011), and the test results are shown in Table 1.

[0106] Table 1 Performance of colored paving asphalt mixture

[0107]

[0108] The penetration and penetration increment of the colored cast asphalt mixture, and the low-temperature bending strain at-10℃ meet the performance requirements of cast asphalt mixture in JTGT3364-02-2019 (penetration 1-4mm, penetration increment ≤0.4mm, low-temperature bending strain at-10℃ ≥2.0×10 -3 ), which can be applied to the pavement paving of carriageway and sidewalk. The performance is also better than that of the colored cast asphalt mixture prepared by ordinary discolored asphalt.

[0109] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently, without departing from the spirit and essence defined in the claims of the present application.

Claims

1. A granular colored castable asphalt mixture, characterized in that, The following components are included by weight: 8-12 parts color powder particles, 2-4 parts elastomer particles, 0.1-0.3 parts plastic particles, 0.1-0.4 parts solid epoxy resin particles, and 84-90 parts stone particles. The pigment particles are prepared from the following raw materials in parts by weight: 40-50 parts resin, 30-40 parts pigment, 10-30 parts first oil, 2-4 parts viscosity reducer, 1-3 parts first flame retardant, and 0.05-0.15 parts dispersant. The elastomer particles are prepared from the following raw materials in parts by weight: 20-40 parts of thermoplastic elastomer, 50-70 parts of second oil, 2-10 parts of curing agent, and 5-15 parts of second flame retardant. The solid epoxy resin particles are prepared from the following raw materials in parts by weight: 50-70 parts solid epoxy resin, 20-40 parts white paste, and 5-15 parts glycerol fatty acid ester.

2. The granular colored castable asphalt mixture according to claim 1, characterized in that, The resin is a solid resin, selected from one or more of petroleum resin, hydrogenated petroleum resin, phenolic resin, terpene resin, rosin-modified marinic acid resin, and coumarone resin, preferably a mixture of one or more of petroleum resin, coumarone resin, and terpene resin.

3. The granular colored castable asphalt mixture according to claim 1, characterized in that, The pigment is selected from one or more of the following: iron oxide red, iron blue, iron green, iron black, iron yellow, medium chrome yellow, lemon yellow, and titanium dioxide. Preferably, the first oil is a mixture of one or more selected from naphthenic oil, aromatic oil, extracted oil, triple-oil oil, and double-oil oil, and more preferably selected from one of naphthenic oil, aromatic oil, extracted oil, and triple-oil oil.

4. The granular colored castable asphalt mixture according to claim 1, characterized in that, The viscosity reducer is selected from Fiedor wax, polyethylene wax, polypropylene wax and polyamide wax, preferably Fiedor wax or polyethylene wax with a dropping melting point of 100 to 140°C. Preferably, the first flame retardant is one or a mixture selected from aluminum dihydrogen phosphate, triphenyl phosphite, melamine, dipentaerythritol, and ammonium polyphosphate; Preferably, the dispersant is selected from Solplus DP310, BYK966, Dispersogen 1728, BYK190, BYK1142, BYK Disperplast-1142, and VOK-W 9010.

5. The granular colored castable asphalt mixture according to claim 1, characterized in that, The thermoplastic elastomer is a styrene-based elastomer, which is one or more mixtures selected from SBS, SIS and SEBS, preferably one or two mixtures selected from SBS and SEBS.

6. The granular colored castable asphalt mixture according to claim 1, characterized in that, The second oil component is one or more of naphthenic oil, reduced-pressure oil, white oil and hydrocracking cycle oil, preferably one or two of naphthenic oil and hydrocracking cycle oil. Preferably, the curing agent is a long-chain amine, and the curing agent is one or more mixtures selected from oleic acid diethanolamide, dodecyl primary amine, octadecyl amine, and cocoyl primary amine; Preferably, the second flame retardant is one or more mixtures selected from aluminum dihydrogen phosphate, triphenyl phosphite, melamine, dipentaerythritol, and ammonium polyphosphate.

7. The granular colored castable asphalt mixture according to claim 1, characterized in that, The plastic granules are low-density polyethylene, selected from linear low-density polyethylene, high-density polyethylene, and polypropylene.

8. The granular colored castable asphalt mixture according to claim 1, characterized in that, The solid epoxy resin is a solid epoxy resin with a softening point of 80°C or higher. The glycerol fatty acid ester is selected from acetylated monoglyceride fatty acid ester, polyglycerol fatty acid ester, and mono- and diglyceride fatty acids.

9. The granular colored castable asphalt mixture according to claim 1, characterized in that, The stone particles are composed of stone particles with a maximum particle size of 13.2 mm and below, with the following percentages for each particle size: 9.5–13.2 mm stone 0–22%, 4.75–9.5 mm stone 17–20%, 2.36–4.75 mm stone 15–18%, 1.18–2.36 mm stone 10–12%, 0.6–1.18 mm stone 5–7%, 0.3–0.6 mm stone 5–7%, 0.15–0.3 mm stone 3–5%, 0.075–0.15 mm stone 4–7%, and stone powder below 0.075 mm 15–28%. Preferably, the stone material with a diameter of 0.075 mm or larger is selected from one of basalt, limestone, quartz sand, diabase, and calcined ceramic particles; Preferably, the stone powder smaller than 0.075 mm is selected from limestone ore powder, heavy calcium carbonate, mica powder, and precipitated barium sulfate, with a particle size greater than or equal to 0.023 mm.

10. A method for preparing granular colored castable asphalt mixture according to any one of claims 1-9, characterized in that, Includes the following steps: 1) Preparation of pigment particles: The resin, first oil and viscosity reducer are mixed evenly at room temperature using a mixer. Then, the color powder, first flame retardant and dispersant are added and mixed evenly. The evenly mixed mixture is fed into an extrusion granulator, and the heating temperature is controlled at 150℃~190℃. The mixture is extruded and granulated into spherical particles, which are then dried for later use. 2) Preparation of elastomer particles: The thermoplastic elastomer, curing agent, and second oil are mixed evenly at room temperature using a mixer. After standing for 1 to 3 hours, the second flame retardant is added and mixed evenly. The evenly mixed mixture is fed into an extrusion granulator, and the heating temperature is controlled at 160℃ to 200℃. The mixture is extruded and granulated into cylindrical particles, which are then dried for later use. 3) Preparation of solid epoxy resin particles: Solid epoxy resin, white grease and glycerol fatty acid ester are mixed evenly at room temperature using a mixer. The heating temperature is controlled at 120℃~160℃. The mixture is then extruded and granulated into cylindrical particles, which are then dried for later use. 4) Preparation of granular colored cast-in-place asphalt mixtures: Dry and cool the stone particles to remove moisture and set aside. At room temperature, use a large disperser to mix the color powder particles, elastomer particles, plastic particles, and solid epoxy resin particles with the stone powder smaller than 0.075mm in the stone particles. Then add stone particles of other sizes and mix evenly. Finally, bag and package the mixed granular colored cast-in-place asphalt mixture.

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