Hydraulic asphalt and preparation method thereof

Abstract

The invention relates to the field of petrochemical engineering, in particular to hydraulic asphalt and a preparation method thereof. According to the hydraulic asphalt provided by the invention, the petroleum asphalt, the SBS modifier, the SBR modifier, the ductility enhancer and the stabilizer are matched according to a certain proportion. The preparation method comprises the following steps: mixing an SBR modifier and a ductility enhancer, and carrying out certain treatment to prepare an SBR mother solution; the method comprises the following steps: preheating petroleum asphalt, mixing the preheated petroleum asphalt with an SBS modifier, heating, stirring for swelling, and shearing to obtain a shearing liquid; and mixing the shearing liquid with the SBR mother liquid, and performing certain treatment to obtain the hydraulic asphalt. The specific raw materials are matched according to a certain proportion, and the specific steps, the preparation sequence and certain process conditions are controlled in the preparation process, so that an asphalt product also has excellent low-temperature performance on the premise of ensuring high-temperature stability. Meanwhile, the viscosity is relatively low, so that the problems of high viscosity and high energy consumption in the production and use process of the hydraulic asphalt are solved.

Description

Technical Field

[0001] The invention relates to the field of petrochemical industry, and in particular to hydraulic asphalt and a preparation method thereof. Background Art

[0002] Pumped storage is an important energy storage technology, which is of great significance for realizing the large-scale application of renewable energy and the flexibility of energy system. In the future, pumped storage will be the key support for "building a new power system with new energy as the main body", complementing renewable energy systems (such as wind power, solar energy, etc.) to achieve the balance and stability of the power system, while optimizing the utilization rate of renewable energy, improving system reliability, and playing a more important role in energy transformation.

[0003] As pumped storage power station reservoirs have adopted asphalt concrete for anti-seepage, and pumped storage power stations have been developed and constructed in high-cold areas, the requirements for low-temperature crack resistance of asphalt concrete have become increasingly higher in order to meet the application of products in high-cold areas. Since hydraulic asphalt is an important raw material for asphalt concrete anti-seepage, in order to ensure the safety and durability of water conservancy projects and overcome the shortcomings of ordinary hydraulic asphalt, which has poor low-temperature resistance and easy cracking, very strict quality requirements are put forward for asphalt anti-seepage materials. Its low-temperature resistance technical index requirements are much stricter than those of heavy traffic road asphalt. Therefore, it is necessary to modify ordinary hydraulic asphalt to develop special hydraulic asphalt products for high-cold areas with excellent high-temperature stability and low-temperature crack resistance. Summary of the invention

[0004] In view of this, the present invention provides a hydraulic asphalt and a preparation method thereof. The hydraulic asphalt provided by the present invention not only meets the requirements of good high temperature performance but also has excellent low temperature crack resistance, ensuring the application performance of the hydraulic asphalt in special environments (such as high-cold areas).

[0005] The present invention provides a hydraulic asphalt, the raw materials for preparing the hydraulic asphalt include:

[0006] Petroleum asphalt;

[0007] SBS modifier, the amount of which is 5% to 15% of the petroleum asphalt;

[0008] SBR modifier, the amount of which is 1% to 3% of the petroleum asphalt;

[0009] A retarder, the dosage of which is 10% to 25% of the petroleum asphalt;

[0010] The stabilizer is used in an amount of 0.1% to 0.3% of the petroleum asphalt.

[0011] Preferably, the mass ratio of the styrene segment to the butadiene segment in the SBS modifier is 30:70, and the weight average molecular weight is 150,000 to 250,000.

[0012] Preferably, the SBS modifier is YH-791.

[0013] Preferably, the mass ratio of the styrene segment to the butadiene segment in the SBR modifier is 30:70, and the weight average molecular weight is 200,000 to 300,000.

[0014] Preferably, the retardant is Mantec modified asphalt special oil.

[0015] Preferably, the stabilizer is Boyue modified asphalt stabilizer.

[0016] Preferably, the petroleum asphalt is Haiyun A-grade road petroleum asphalt.

[0017] The present invention also provides a method for preparing the hydraulic asphalt described in the above technical solution, comprising the following steps:

[0018] A) mixing the SBR modifier and the extending agent, heating and stirring to obtain an SBR mother liquor;

[0019] B) mixing the preheated petroleum asphalt with the SBS modifier, heating, stirring, swelling, and shearing to obtain a shearing fluid;

[0020] C) mixing the shearing liquid with the SBR mother liquor and shearing them, then adding a stabilizer under stirring, heating and stirring to develop, and obtaining hydraulic asphalt;

[0021] There is no order restriction for step A) and step B).

[0022] Preferably, in step A), the heating temperature is 130-150° C.; the stirring rate is 200-300 rpm, and the time is 20-40 min.

[0023] Preferably, in step B), the preheating temperature of the preheated petroleum asphalt is 130-140°C; the heating temperature of the mixed heating is 175-180°C; the stirring rate of the stirring swelling is 200-300 rpm, and the stirring time is 40-60 min; the shearing speed is 3500-4500 rpm, the time is 30-45 min, and the shearing temperature is 175-180°C;

[0024] In step C), the shearing speed is 3500-4500 rpm for 20-30 min; the heating and stirring temperature is 180-185° C. for 5-10 h.

[0025] The hydraulic asphalt provided by the present invention is a mixture of petroleum asphalt, SBS modifier, SBR modifier, extender and stabilizer in a certain proportion. The preparation method of the present invention is to mix the SBR modifier with the extender and prepare the SBR mother liquor through a certain treatment; preheat the petroleum asphalt and mix the preheated petroleum asphalt with the SBS modifier, heat, stir, swell and shear to obtain a shear liquid; then mix the above-mentioned shear liquid with the SBR mother liquor and treat it to obtain the hydraulic asphalt. The present invention adopts specific raw materials in a certain proportion, controls the above-mentioned specific steps and preparation sequence and certain process conditions during the preparation process, and can make the asphalt product have excellent low-temperature performance under the premise of ensuring high-temperature stability. At the same time, it also has good uniformity, no particles are generated during use, and its viscosity is small, which reduces the problem of high viscosity and high energy consumption of hydraulic asphalt during production and use. In addition, in the above-mentioned preparation method, the raw materials are widely available and the preparation process is simple. That is, the present invention provides a hydraulic asphalt product with a simple production process and excellent high and low temperature performance, improves the quality of hydraulic asphalt, and ensures the application performance of hydraulic asphalt in special environments (such as high-cold areas).

[0026] Experimental results show that the hydraulic asphalt of the present invention has a softening point of above 79°C and a brittle point of below -33°C, and exhibits excellent low-temperature performance while ensuring high-temperature stability. DETAILED DESCRIPTION

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0029] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0030] Herein, when it comes to numerical ranges, unless otherwise specified, the numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0031] In this article, when referring to the unit of a data range, if there is a unit only after the right endpoint, it means that the units of the left and right endpoints are the same. For example, 130-150℃ means that the units of the left endpoint "130" and the right endpoint "150" are both ℃.

[0032] Only some numerical ranges are specifically disclosed herein. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, and likewise any upper limit can be combined with any other upper limit to form an unspecified range. In addition, each separately disclosed point or single value can itself be combined as a lower limit or upper limit with any other point or single value or with other lower limits or upper limits to form an unspecified range.

[0033] The present invention provides a hydraulic asphalt, the raw materials for preparing the hydraulic asphalt include:

[0034] Petroleum asphalt;

[0035] SBS modifier, the amount of which is 5% to 15% of the petroleum asphalt;

[0036] SBR modifier, the amount of which is 1% to 3% of the petroleum asphalt;

[0037] A retarder, the dosage of which is 10% to 25% of the petroleum asphalt;

[0038] The stabilizer is used in an amount of 0.1% to 0.3% of the petroleum asphalt.

[0039] In the present invention, the petroleum asphalt is preferably Haiyun A-grade road petroleum asphalt, with a needle penetration of 60 to 80 (1 / 10 mm) at 25° C. More preferably, it is Haiyun brand 70# A-grade road petroleum asphalt.

[0040] In the present invention, the SBS modifier (i.e., styrene-butadiene-styrene block copolymer) is preferably an SBS with a mass ratio of styrene segments to butadiene segments of 30:70 and a weight average molecular weight of 150,000 to 250,000; more preferably, it is an SBS with a model of YH-791, and further preferably, it is Yueyang Petrochemical YH-791. In the present invention, the amount of the SBS modifier is 5% to 15% of the mass of the petroleum asphalt, specifically 5%, 6%, 7%, 7.5%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%.

[0041] In the present invention, the SBR modifier (i.e. styrene-butadiene rubber, also known as polystyrene-butadiene copolymer) is preferably an SBR with a mass ratio of styrene segments to butadiene segments of 30:70 and a weight average molecular weight of 200,000 to 300,000, which is a styrene-butadiene latex anionic and cationic emulsified asphalt modifier, specifically the SBR asphalt modifier of Shandong Gaoshi Science and Technology Industry and Trade Co., Ltd. In the present invention, the amount of the SBR modifier is 1% to 3% of the petroleum asphalt, specifically 1%, 1.5%, 2%, 2.5%, 3%.

[0042] In the present invention, the retardant is preferably Mantek modified asphalt special oil, which is from Dongying Mantek Petrochemical Co., Ltd., and mainly contains surfactants, non-rubber oil, furfural extract oil additives, and its density is 0.95-1.05 g / cm 3 , the flash point is greater than 230°C, and the aromatic content of non-rubber oil is not less than 70%. The present invention adopts the above-mentioned retardant in combination with other components of the present invention, which can effectively improve the problem of poor low-temperature ductility of modified asphalt, increase the ductility of modified asphalt before and after aging, and improve its low-temperature performance. In the present invention, the amount of the retardant is preferably 10% to 25% of the petroleum asphalt, specifically 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%.

[0043] In the present invention, the stabilizer is preferably Boyue modified asphalt stabilizer (i.e. HMD modified asphalt stabilizer), which is derived from Dongying Runfeng Boyue Petroleum Technology Co., Ltd., and its main components are sulfur, butyl rubber, EPDM rubber, nitrile rubber and butadiene rubber, etc.; the present invention uses the above stabilizer to enable the modifier to undergo gelling in the asphalt, forming a network structure, increasing the thermal stability and toughness of the asphalt, making the penetration ratio of the asphalt larger after hot storage, the softening point change smaller, and the performance more stable. In the present invention, the amount of the stabilizer is preferably 0.1% to 0.3% of the petroleum asphalt, specifically 0.1%, 0.15%, 0.2%, 0.25%, 0.3%.

[0044] In one embodiment of the present invention, the raw materials for preparing hydraulic asphalt are as follows:

[0045] Petroleum asphalt;

[0046] SBS modifier, the dosage is 6% of petroleum asphalt;

[0047] SBR modifier, the dosage is 1% of petroleum asphalt;

[0048] Retardant, the dosage is 14% of petroleum asphalt;

[0049] Stabilizer, dosage is 0.15% of petroleum asphalt.

[0050] In another embodiment of the present invention, the raw materials for preparing hydraulic asphalt are as follows:

[0051] Petroleum asphalt;

[0052] SBS modifier, the dosage is 7.5% of petroleum asphalt;

[0053] SBR modifier, the dosage is 1% of petroleum asphalt;

[0054] Retardant, the dosage is 16% of petroleum asphalt;

[0055] Stabilizer, dosage is 0.2% of petroleum asphalt.

[0056] In another embodiment of the present invention, the raw materials for preparing hydraulic asphalt are as follows:

[0057] Petroleum asphalt;

[0058] SBS modifier, the dosage is 9% of petroleum asphalt;

[0059] SBR modifier, the dosage is 2% of petroleum asphalt;

[0060] Retardant, the dosage is 22% of petroleum asphalt;

[0061] Stabilizer, dosage is 0.2% of petroleum asphalt.

[0062] In another embodiment of the present invention, the raw materials for preparing hydraulic asphalt are as follows:

[0063] Petroleum asphalt;

[0064] SBS modifier, the dosage is 11% of petroleum asphalt;

[0065] SBR modifier, the dosage is 2% of petroleum asphalt;

[0066] Retardant, dosage is 25% of petroleum asphalt;

[0067] Stabilizer, dosage is 0.25% of petroleum asphalt.

[0068] The present invention also provides a method for preparing the hydraulic asphalt described in the above technical solution, comprising the following steps:

[0069] A) mixing the SBR modifier and the extending agent, heating and stirring to obtain an SBR mother liquor;

[0070] B) mixing the preheated petroleum asphalt with the SBS modifier, heating, stirring, swelling, and shearing to obtain a shearing fluid;

[0071] C) mixing the shearing liquid with the SBR mother liquor and shearing them, then adding a stabilizer under stirring, heating and stirring to develop, and obtaining hydraulic asphalt;

[0072] There is no order restriction for step A) and step B).

[0073] Among them, the types and amounts of the petroleum asphalt, SBS modifier, SBR modifier, retardant and stabilizer are consistent with those described in the previous technical solution and will not be repeated here.

[0074] [About Step A]:

[0075] In the present invention, the SBR modifier and the retardant are mixed and heated, and the heating temperature is preferably 130-150°C, specifically 130°C, 135°C, 140°C, 145°C, 150°C. Heated to the above temperature, stirred. The stirring speed is preferably 200-300rpm, specifically 200rpm, 210rpm, 220rpm, 230rpm, 240rpm, 250rpm, 260rpm, 270rpm, 280rpm, 290rpm, 300rpm. The stirring time is preferably 20-40min, specifically 20min, 25min, 30min, 35min, 40min. After the above heating and stirring treatment, a uniform and viscous SBR mother liquor is obtained.

[0076] [About step B]:

[0077] In the present invention, the preheated petroleum asphalt refers to the petroleum asphalt that is heated in advance to a flowable state and then mixed with other components. The preheating temperature is preferably heated to 130-140°C, specifically 130°C, 135°C, 140°C, and more preferably 135°C.

[0078] In the present invention, the preheated petroleum asphalt is mixed with the SBS modifier and heated, and the heating temperature is preferably 175-180°C, specifically 175°C, 176°C, 177°C, 178°C, 179°C, 180°C, and more preferably 175°C. The heating process is preferably accompanied by stirring, and the stirring rate is preferably 200-300rpm, specifically 200rpm, 250rpm, 300rpm. After stirring and heating to the above temperature, it is preferred to continue stirring to fully swell the SBS modifier, that is, after heating to the above temperature, continue stirring and swelling; the stirring rate in this stage is preferably 200-300rpm, specifically 200rpm, 250rpm, 300rpm; the stirring time is preferably 40-60min, specifically 40min, 45min, 50min, 55min, 60min, and more preferably 1h. After the above stirring and swelling, shearing is started; the shearing speed is preferably 3500-4500rpm, specifically 3500rpm, 3600rpm, 3700rpm, 3800rpm, 3900rpm, 4000rpm, 4100rpm, 4200rpm, 4300rpm, 4400rpm, 4500rpm, more preferably 4000rpm; the shearing time is preferably 30-45min, specifically 30min, 35min, 40min, 45min, more preferably 45min; the shearing temperature is preferably 175-180°C, specifically 175°C, 176°C, 177°C, 178°C, 179°C, 180°C. After the above treatment, a shearing liquid is obtained.

[0079] The present invention has no special restrictions on the order of step A) and step B). There is no special restriction on the order of preparing the preheated petroleum asphalt in step B) and step A), for example, the petroleum asphalt can be preheated first, and then step A).

[0080] [About Step C]:

[0081] In the present invention, after obtaining the SBR mother liquor in step A) and the shearing liquid in step B), the two are mixed and sheared. In actual operation, after obtaining the shearing liquid in step B), the SBR mother liquor can be directly added to the shearing liquid to continue shearing. The shearing speed is preferably 3500-4500rpm, specifically 3500rpm, 3600rpm, 3700rpm, 3800rpm, 3900rpm, 4000rpm, 4100rpm, 4200rpm, 4300rpm, 4400rpm, 4500rpm, more preferably the same as the shearing speed in step B); the shearing time is preferably 20-30min, specifically 20min, 25min, 30min, more preferably 20min.

[0082] In the present invention, after the above-mentioned shear treatment, stirring is carried out and a stabilizer is added under stirring, and heating and stirring are carried out for development. Wherein, the stirring rate is preferably 200-300rpm, specifically 200rpm, 250rpm, 300rpm. The heating temperature is preferably 180-185°C, specifically 180°C, 181°C, 182°C, 183°C, 184°C, 185°C, and more preferably 183°C. The stirring and development time is preferably 5-10h, specifically 5h, 6h, 7h, 8h, 9h, 10h, and more preferably 5h. The present invention adds a stabilizer at the end, so that the modifier undergoes a cross-linking reaction under the action of the stabilizer, and at the same time prevents the gel phenomenon from occurring, thereby obtaining a hydraulic asphalt sample with higher stability.

[0083] In some embodiments of the present invention, the preparation process is as follows:

[0084] A) Mix the SBR modifier and the extender, heat to 170°C, and stir at 200 rpm for 30 minutes to obtain a uniform and viscous SBR mother liquid.

[0085] B) Preheat the petroleum asphalt at 135°C until the sample is easy to flow, then add SBS modifier, heat the sample to 175°C while stirring (rotation speed is 300 rpm), and then continue to stir and swell at this temperature for 1 hour. After that, shear it with a high-speed shearing machine at 4000 rpm for 45 minutes, and the shearing temperature is 175-180°C to obtain a shearing liquid.

[0086] C) adding the SBR mother liquor obtained in step A) to the shearing liquid of step B), and continuing shearing at the same shearing speed for 20 minutes. After the shearing is completed, adding a stabilizer under stirring (speed of 300 rpm), and stirring and developing at 183° C. for 5 hours to obtain hydraulic asphalt.

[0087] The hydraulic asphalt provided by the present invention is a mixture of petroleum asphalt, SBS modifier, SBR modifier, extender and stabilizer in a certain proportion. The preparation method of the present invention is to mix the SBR modifier with the extender and prepare the SBR mother liquor through a certain treatment; preheat the petroleum asphalt and mix the preheated petroleum asphalt with the SBS modifier, heat, stir, swell and shear to obtain a shear liquid; then mix the above-mentioned shear liquid with the SBR mother liquor and treat it to obtain the hydraulic asphalt. The present invention adopts specific raw materials in a certain proportion, controls the above-mentioned specific steps and preparation sequence and certain process conditions during the preparation process, and can make the asphalt product have excellent low-temperature performance under the premise of ensuring high-temperature stability. At the same time, it also has good uniformity, no particles are generated during use, and its viscosity is small, which reduces the problem of high viscosity and high energy consumption of hydraulic asphalt during production and use. In addition, in the above-mentioned preparation method, the raw materials are widely available and the preparation process is simple. That is, the present invention provides a hydraulic asphalt product with a simple production process and excellent high and low temperature performance, improves the quality of hydraulic asphalt, and ensures the application performance of hydraulic asphalt in special environments (such as high-cold areas).

[0088] Experimental results show that the hydraulic asphalt of the present invention has a softening point of above 79°C and a brittle point of below -33°C, and exhibits excellent low-temperature performance while ensuring high-temperature stability.

[0089] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0090] Unless otherwise specified, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods. Among them, petroleum asphalt is Haiyun brand 70#A grade road petroleum asphalt; SBS modifier is Yueyang Petrochemical YH-791; SBR modifier is SBR asphalt modifier of Shandong Gaoshi Science and Technology Industry and Trade Co., Ltd.; retardant is Mantek modified asphalt special oil; stabilizer is Boyue modified asphalt stabilizer.

[0091] Example 1

[0092] 1. Raw materials:

[0093] Petroleum asphalt;

[0094] SBS modifier, the dosage is 6% of petroleum asphalt;

[0095] SBR modifier, the dosage is 1% of petroleum asphalt;

[0096] Retardant, the dosage is 14% of petroleum asphalt;

[0097] Stabilizer, dosage is 0.15% of petroleum asphalt.

[0098] 2. Preparation:

[0099] A) Mix the SBR modifier and the extender, heat to 150°C, and stir at 200 rpm for 30 minutes to obtain a uniform and viscous SBR mother liquid.

[0100] B) Preheat the petroleum asphalt at 135°C until the sample is easy to flow, then add SBS modifier, heat the sample to 175°C while stirring (rotation speed is 300 rpm), and then continue to stir and swell at this temperature for 1 hour. After that, shear it with a high-speed shearing machine at 4000 rpm for 45 minutes, and the shearing temperature is 175-180°C to obtain a shearing liquid.

[0101] C) adding the SBR mother liquor obtained in step A) to the shearing liquid of step B), and continuing shearing at the same shearing speed for 20 minutes. After the shearing is completed, adding a stabilizer under stirring (speed of 300 rpm), and stirring and developing at 183° C. for 5 hours to obtain hydraulic asphalt.

[0102] Example 2

[0103] 1. Raw materials:

[0104] Petroleum asphalt;

[0105] SBS modifier, the dosage is 7.5% of petroleum asphalt;

[0106] SBR modifier, the dosage is 1% of petroleum asphalt;

[0107] Retardant, the dosage is 16% of petroleum asphalt;

[0108] Stabilizer, dosage is 0.2% of petroleum asphalt.

[0109] 2. Preparation: Same as Example 1.

[0110] Example 3

[0111] 1. Raw materials:

[0112] Petroleum asphalt;

[0113] SBS modifier, the dosage is 9% of petroleum asphalt;

[0114] SBR modifier, the dosage is 2% of petroleum asphalt;

[0115] Retardant, the dosage is 22% of petroleum asphalt;

[0116] Stabilizer, dosage is 0.2% of petroleum asphalt.

[0117] 2. Preparation: Same as Example 1.

[0118] Example 4

[0119] 1. Raw materials:

[0120] Petroleum asphalt;

[0121] SBS modifier, the dosage is 11% of petroleum asphalt;

[0122] SBR modifier, the dosage is 2% of petroleum asphalt;

[0123] Retardant, the dosage is 25% of petroleum asphalt;

[0124] Stabilizer, dosage is 0.25% of petroleum asphalt.

[0125] 2. Preparation: Same as Example 1.

[0126] Sample testing:

[0127] Various tests were performed on the asphalt samples obtained in Examples 1-4, and the results are shown in Table 1.

[0128] Table 1: Test results of asphalt samples of Examples 1-4

[0129] Test items Example 1 Example 2 Example 3 Example 4 Needle penetration, 25℃, 0.1mm 113 110 115 110 Softening point, ℃ 79 82 85 86 Elongation, 5℃, cm 82 89 ＞100 ＞100 Viscosity at 135℃, pa·s 1.85 2.22 2.58 2.91 Brittle point, ℃ -33 -38 -42 -45 Separation, ℃ 0.6 0.8 0.1 0.2 Aging ductility, 5℃, cm 53 62 79 88 Asphalt concrete freezing temperature, ℃ -38 -42 -47 -49

[0130] It can be seen from the test results in Table 1 that the softening point of the hydraulic asphalt of the present invention is above 79°C, and its brittle point is below -33°C. It has a high softening point and a good low-temperature brittle point, indicating that the product has excellent high and low temperature performance and can effectively prevent low-temperature freezing and high-temperature flowing phenomena. At the same time, the viscosity of the hydraulic asphalt of the present invention is below 3Pa.s, indicating that the product has a lower viscosity, which can alleviate the problem of high viscosity and high energy consumption of hydraulic asphalt during production and use; in addition, the difference temperature of the separation softening point of the hydraulic asphalt of the present invention is below 0.8°C, indicating that the product has good storage stability. In addition, the ductility of the hydraulic asphalt of the present invention is above 82cm, and the ductility after aging is still above 53cm, indicating that the product has excellent ductility indicators before and after aging.

[0131] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A hydraulic asphalt, characterized in that: The raw materials for its preparation include: Petroleum asphalt; SBS modifier, the amount of which is 5% to 15% of the petroleum asphalt; SBR modifier, the amount of which is 1% to 3% of the petroleum asphalt; A retarder, the dosage of which is 10% to 25% of the petroleum asphalt; The stabilizer is used in an amount of 0.1% to 0.3% of the petroleum asphalt.

2. The hydraulic asphalt according to claim 1, characterized in that: The mass ratio of the styrene segment to the butadiene segment in the SBS modifier is 30:70, and the weight average molecular weight is 150,000 to 250,000.

3. The hydraulic asphalt according to claim 1 or 2, characterized in that: The SBS modifier is YH-791.

4. The hydraulic asphalt according to claim 1, characterized in that: The mass ratio of the styrene segment to the butadiene segment in the SBR modifier is 30:70, and the weight average molecular weight is 200,000 to 300,000.

5. The hydraulic asphalt according to claim 1, characterized in that: The retarder is Mantec modified asphalt special oil.

6. The hydraulic asphalt according to claim 1, characterized in that: The stabilizer is Boyue modified asphalt stabilizer.

7. The hydraulic asphalt according to claim 1, characterized in that: The petroleum asphalt is Haiyun A-grade road petroleum asphalt.

8. A method for preparing hydraulic asphalt according to any one of claims 1 to 7, characterized in that: The following steps are involved: A) mixing the SBR modifier and the extending agent, heating and stirring to obtain an SBR mother liquor; B) mixing the preheated petroleum asphalt with the SBS modifier, heating, stirring, swelling, and shearing to obtain a shearing fluid; C) mixing the shearing liquid with the SBR mother liquor and shearing them, then adding a stabilizer under stirring, heating and stirring to develop, and obtaining hydraulic asphalt; There is no order restriction for step A) and step B).

9. The preparation method according to claim 8, characterized in that: In step A), the heating temperature is 130-150° C.; the stirring rate is 200-300 rpm, and the stirring time is 20-40 min.

10. The preparation method according to claim 8, characterized in that: In step B), the preheating temperature of the preheated petroleum asphalt is 130-140°C; the heating temperature of the mixed heating is 175-180°C; the stirring rate of the stirring swelling is 200-300 rpm, and the stirring time is 40-60 min; the shearing speed is 3500-4500 rpm, the time is 30-45 min, and the shearing temperature is 175-180°C; In step C), the shearing speed is 3500-4500 rpm for 20-30 min; the heating and stirring temperature is 180-185° C. for 5-10 h.