Raw material composition for steel slag-asphalt mixture, and steel slag-asphalt mixture and preparation and use thereof

Abstract

Disclosed in the present invention are a raw material composition for a steel slag-asphalt mixture, and a steel slag-asphalt mixture and the preparation and use thereof. The raw material composition for a steel slag-asphalt mixture comprises the following components in parts by mass: 100 parts of steel slag, 2-8 parts of a steel slag modifier, 20-40 parts of modified emulsified asphalt, and 3-8 parts of a surfactant, wherein the modified emulsified asphalt comprises the following components in parts by mass: 100 parts of matrix asphalt, 15-20 parts of EVA, 0.08-0.5 parts of a stabilizer, 1.5-5 parts of an emulsifier, and 0.5-2 parts of a defoaming agent. The operable time of the steel slag-asphalt mixture of the present invention is greatly prolonged; moreover, the curing time is shortened, and the strength after curing is maintained.

Description

Steel slag asphalt mixture raw material composition, steel slag asphalt mixture and preparation and application thereof TECHNICAL FIELD

[0001] The present application relates to a steel slag asphalt mixture raw material composition, a steel slag asphalt mixture and preparation and application thereof. BACKGROUND

[0002] In recent years, the road has gradually changed from construction to maintenance, and in road maintenance, the local high difference phenomenon of the pavement at the bridge expansion joint, the well cover and the uneven settlement of the bridge head, seriously affects the road safety and driving comfort, and also has adverse effects on the service life of vehicles, roads and bridges. In addition, once the high difference disease site is formed, the stress and strain conditions are complex under the action of vehicle load.

[0003] At present, the traditional repair material is mainly basalt asphalt mixture, which not only has high cost, but also is easy to be damaged again, so that the high difference disease reappears, and it is difficult to restore the road flatness and ensure the driving safety.

[0004] Due to the special chemical properties and excellent properties of steel slag, it is gradually applied to road construction and maintenance. The matching of the currently marketed emulsified asphalt (such as emulsified asphalt BCR) and steel slag is poor, and there are problems such as long demulsification time without adding modifier, long curing time, no strength after curing, instantaneous demulsification with adding modifier, and no operable time. Analyzing the above reasons, the main reason is that the cationic emulsifier in the marketed modified emulsified asphalt and the negative charge in the steel slag modifier (mainly cement) in the steel slag are adsorbed after mixing the marketed modified emulsified asphalt with the steel slag, and the emulsified asphalt demulsifies instantaneously, but the strength of the emulsified asphalt mixed with the steel slag and cement has not been formed, and a long time is needed. Therefore, there is an urgent need for a modified emulsified asphalt suitable for steel slag aggregate, and a steel slag asphalt mixture with low cost, convenient construction (mainly long operable time and short curing time) and excellent durability. SUMMARY

[0005] The present application solves the problem of poor road performance of the asphalt mixture prepared by mixing the existing modified emulsified asphalt with steel slag, and further provides a steel slag asphalt mixture raw material composition, a steel slag asphalt mixture and preparation and application thereof. The modified emulsified asphalt of the present application has one or more of the following advantages: (1) good storage stability, (2) good operability, (3) greatly improved operable time after mixing with steel slag, and (4) reduced curing time of steel slag asphalt mixture.

[0006] The present application solves the above technical problems by the following technical solutions:

[0007] The application provides a modified emulsified asphalt raw material composition, which comprises the following components in mass fractions: 100 parts of base asphalt, 15-20 parts of EVA, 0.08-0.5 parts of a stabilizer, 1.5-5 parts of an emulsifier and 0.5-2 parts of an antifoaming agent.

[0008] In the application, the base asphalt can be a conventional base asphalt in the art, for example, No. 70 road petroleum asphalt and / or No. 90 road petroleum asphalt.

[0009] The No. 70 road petroleum asphalt has a penetration of 70 under 0.1 mm at 25 DEG C, a softening point of 45 DEG C and a ductility of 20 cm at 5 DEG C.

[0010] The No. 90 road petroleum asphalt has a penetration of 90 under 0.1 mm at 25 DEG C, a softening point of 45 DEG C and a ductility of 40 cm at 5 DEG C.

[0011] In the application, the content of VA (vinyl acetate) in the EVA (ethylene-vinyl acetate copolymer) is preferably 25-27%, for example, 26%.

[0012] In the application, the weight average molecular weight of the EVA is preferably 1000-3000, for example, 2000, and the EVA is more preferably Japanese Toaso 685.

[0013] In the application, the emulsifier is preferably a medium-split cationic asphalt emulsifier. The medium-split cationic asphalt emulsifier is preferably stearamidopropyl dimethylamine, for example, an emulsifier with model number whshuer of Wuhan Shuer Biological Technology Co., Ltd.

[0014] In the application, the stabilizer is an inorganic stabilizer and / or an organic stabilizer. The inorganic stabilizer is preferably calcium chloride and / or ammonium chloride, and the organic stabilizer is preferably methyl cellulose and / or polyacrylamide.

[0015] In the application, the content of the antifoaming agent is preferably 1-1.5 parts, for example, 1 part or 1.5 parts.

[0016] In the application, the antifoaming agent is a conventional antifoaming agent in the art, preferably a fluorine-containing non-ionic surfactant compound containing a hydroxyl compound, for example, DL-151 of Huizhou Huashengyuan Material Co., Ltd. or B-331 of Guangdong Zhongke Hongtai New Material Co., Ltd.

[0017] In the application, the content of the EVA is preferably 15-17 parts, for example, 16 parts.

[0018] In the application, the content of the stabilizer is preferably 0.1-0.2 parts, for example, 0.1 part or 0.2 part.

[0019] In the present application, the emulsifier is preferably 2-3 parts, for example 2 parts or 3 parts.

[0020] In the present application, the pH of the system formed after mixing of the components in the modified emulsified asphalt raw material composition is preferably 1-2.

[0021] The pH of the system can be adjusted by a pH adjuster. The pH adjuster is preferably 0.1-0.2 parts, for example 0.1 parts or 0.15 parts.

[0022] The pH adjuster is preferably phosphoric acid. The concentration of the phosphoric acid is preferably 3-7%, for example 5%.

[0023] In the present application, the modified emulsified asphalt raw material composition can further include water.

[0024] The water is preferably 40-70 parts, for example 50 parts or 60 parts.

[0025] In the present application, the modified emulsified asphalt raw material composition is preferably composed of the following components in mass parts: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, and 0.5-2 parts of defoaming agent.

[0026] In the present application, the modified emulsified asphalt raw material composition is preferably composed of the following components in mass parts: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, and 0.5-2 parts of defoaming agent.

[0027] In the present application, the modified emulsified asphalt raw material composition is composed of the following components in mass parts: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, and 0.5-2 parts of defoaming agent.

[0028] In the present application, the modified emulsified asphalt raw material composition is composed of the following components in mass parts: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, and 0.5-2 parts of defoaming agent.

[0029] In the present application, the modified emulsified asphalt raw material composition is composed of the following components in mass fraction: 70# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.2 parts, emulsifier 3 parts, defoaming agent 1.5 parts, phosphoric acid 0.1 part, deionized water 50 parts; EVA is Japan Toaso 685, emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0030] In the present application, the modified emulsified asphalt raw material composition is composed of the following components in mass fraction: 70# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.2 parts, emulsifier 3 parts, defoaming agent 1.5 parts, phosphoric acid 0.1 part, deionized water 50 parts; EVA is Japan Toaso 685, emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0031] The present application provides a modified emulsified asphalt, which comprises the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.08-0.5 parts, emulsifier 1.5-5 parts, and defoaming agent 0.5-2 parts.

[0032] The base asphalt, the EVA, the stabilizer, the emulsifier and the defoaming agent are the base asphalt, the EVA, the stabilizer, the emulsifier and the defoaming agent in the aforementioned modified emulsified asphalt raw material composition.

[0033] In the present application, the pH of the modified emulsified asphalt is preferably 1-2.

[0034] In the present application, the modified emulsified asphalt can further comprise water. Preferably, the water is 40-70 parts, for example 50 parts or 60 parts.

[0035] In the present application, the solid content of the modified emulsified asphalt is preferably 60-70%, for example 65%, 66% or 68%.

[0036] In the present application, the Engler viscosity of the modified emulsified asphalt is preferably 3-30, more preferably 3-10, for example 5.8, 6.6 or 7.8.

[0037] In the present application, the modified emulsified asphalt is preferably composed of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, and defoaming agent 0.5-2 parts.

[0038] In the present application, the modified emulsified asphalt is preferably composed of the following components in mass fraction: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, 40-70 parts of water.

[0039] In the present application, the modified emulsified asphalt is preferably composed of the following components in mass fraction: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, 40-70 parts of water.

[0040] In the present application, the modified emulsified asphalt is preferably composed of the following components in mass fraction: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, 40-70 parts of water.

[0041] In the present application, the modified emulsified asphalt is preferably composed of the following components in mass fraction: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, 40-70 parts of water.

[0042] In the present application, the modified emulsified asphalt is preferably composed of the following components in mass fraction: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, 40-70 parts of water.

[0043] In the present application, the modified emulsified asphalt is preferably composed of the following components in mass fraction: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, 40-70 parts of water.

[0044] The present application also provides a preparation method of the modified emulsified asphalt, which comprises the following steps: mixing each raw material component in the aforementioned modified emulsified asphalt raw material composition to obtain the modified emulsified asphalt.

[0045] In the present application, the preparation method of the modified emulsified asphalt preferably comprises the following steps:

[0046] (1) mixing the base asphalt, the EVA and the stabilizer to obtain modified asphalt;

[0047] (2) adjusting the pH value of the solution of the emulsifier to 1-2 to obtain a soap solution;

[0048] (3) mixing the modified asphalt with the soap solution to obtain modified emulsified asphalt;

[0049] When the modified emulsified asphalt raw material composition further comprises the aforementioned defoaming agent, in step (3), the defoaming agent is added into the soap solution at the same time as the modified asphalt;

[0050] When the modified emulsified asphalt raw material composition further comprises the aforementioned water, in step (2), the preparation method of the soap solution comprises: mixing the water with the emulsifier to form an emulsifier solution, adjusting the pH value of the emulsifier solution to 1-2 to obtain a soap solution.

[0051] In step (1), the preparation method of the modified asphalt can comprise the following steps: heating the base asphalt and mixing with the EVA for primary swelling, and then mixing with the stabilizer for secondary swelling to obtain the modified asphalt.

[0052] The preparation method of the modified asphalt more preferably comprises: after the base asphalt is heated to a first temperature, the EVA is added for primary swelling, a first stirring speed is adopted and the temperature is raised, when the temperature is raised to a second temperature, the first stirring speed is increased to a second stirring speed for primary shearing, then the stabilizer is added for secondary shearing, and after the shearing is stopped, secondary swelling is performed to obtain the modified asphalt.

[0053] The temperature of the primary swelling is preferably 160-180°C, for example 160°C.

[0054] The time of the primary swelling is preferably 15-30 min, for example 15 min, 20 min or 30 min.

[0055] The temperature of the secondary swelling is preferably 190-210°C, for example 190°C, 200°C or 210°C.

[0056] The time of the secondary swelling is preferably 1.5-2.5 h, for example 2 h.

[0057] The first temperature is preferably 160-180°C, for example 160°C.

[0058] The first-stage rotating speed is preferably 1000-2000 r / min, for example 1000 r / min, 1500 r / min or 2000 r / min.

[0059] The second-stage temperature is preferably 180-200℃, for example 180℃, 185℃ or 190℃.

[0060] The second-stage rotating speed is preferably 4000-6000 r / min, for example 4000 r / min, 5000 r / min or 5500 r / min.

[0061] The time of the first-stage shearing is preferably 20-60 min, for example 20 min, 25 min or 30 min.

[0062] The time of the second-stage shearing is preferably 20-30 min, for example 15 min, 20 min or 30 min.

[0063] The stirring device can be conventional in the art, for example a high-speed shearing instrument.

[0064] In the present application, in step (3), the preparation method of the modified emulsified asphalt can be conventional in the art, and preferably comprises: stirring the soap solution, adding the modified asphalt into the soap solution, shearing three times, grinding the mixture after shearing, and obtaining the modified emulsified asphalt.

[0065] Preferably, the method for stirring the soap solution comprises: first stirring the soap solution at three-stage rotating speeds, and then increasing to four-stage rotating speeds.

[0066] The three-stage rotating speed is preferably 2000-3000 r / min, for example 2000 r / min, 2500 r / min or 3000 r / min.

[0067] The time for stirring the soap solution is preferably 60-120 s, for example 60 s.

[0068] The four-stage rotating speed is preferably 7000-8500 r / min, for example 7000 r / min, 7500 r / min or 8500 r / min.

[0069] Preferably, the time for the three-stage shearing is 5-10 min, for example 5 min or 10 min.

[0070] Preferably, the grinding temperature is 50-70℃, for example 60℃.

[0071] Preferably, the grinding rotating speed is 2000-4000 r / min, for example 3000 r / min, 3500 r / min or 4000 r / min.

[0072] The grinding time is preferably 30-45s, such as 35s, 40s or 45s.

[0073] In the present application, when water is further included in the modified emulsified asphalt raw material composition, the temperature of the mixing in the preparation of the soap solution in step (2) is 50-60℃. The mixing method of the water and the emulsifier preferably comprises: heating the water to 50-60℃, and then adding the emulsifier.

[0074] The present application also provides the modified emulsified asphalt prepared by the preparation method of the modified emulsified asphalt.

[0075] In the present application, the solid content of the modified emulsified asphalt is preferably 60-70%, such as 65%, 66% or 68%.

[0076] In the present application, the Engler viscosity of the modified emulsified asphalt is preferably 3-30, more preferably 3-10, such as 5.8, 6.6 or 7.8.

[0077] In the present application, the modified emulsified asphalt is preferably used as a mixing emulsified asphalt for cold mixing of steel slag asphalt mixture.

[0078] The present application also provides an application of the modified emulsified asphalt in cold mixing of steel slag asphalt mixture, wherein the modified emulsified asphalt is the aforementioned modified emulsified asphalt.

[0079] The present application also provides a steel slag asphalt mixture raw material composition, which comprises the following components in mass fraction: 100 parts of steel slag, 2-8 parts of steel slag modifier, 20-40 parts of the aforementioned modified emulsified asphalt, and 3-8 parts of surfactant.

[0080] In the present application, the surfactant is preferably a non-ionic surfactant. The non-ionic surfactant is preferably a polyoxyethylene ether non-ionic surfactant or an amide non-ionic surfactant.

[0081] The polyoxyethylene ether non-ionic surfactant is preferably an alkyl phenol polyoxyethylene ether or a fatty alcohol polyoxyethylene ether, such as OP-10 or AEO-9.

[0082] The amide non-ionic surfactant is preferably coconut oil fatty acid diethanol amide, such as 6501.

[0083] In the present application, the surfactant is preferably 4-6 parts, such as 5 parts.

[0084] In the present application, the steel slag can be one of the conventional steel slags, such as electric furnace steel slag, blast furnace steel slag or converter steel slag.

[0085] In the present application, the steel slag preferably comprises 5-11% of steel slag with a particle size of 0.15-1.18 mm, 30-40% of steel slag with a particle size of 1.18-2.36 mm and 55-65% of steel slag with a particle size of 1-3 mm, for example, 10% of steel slag with a particle size of 0.15-1.18 mm, 30% of steel slag with a particle size of 1.18-2.36 mm and 60% of steel slag with a particle size of 1-3 mm.

[0086] In the present application, the steel slag modifier preferably comprises 3-5 parts, for example, 3 parts, 4 parts or 5 parts.

[0087] In the present application, the modified emulsified asphalt preferably comprises 25-30 parts, for example, 25 parts, 27 parts or 30 parts.

[0088] In the present application, the steel slag modifier preferably comprises a base and an auxiliary agent, wherein the base is cement and / or lime, and the auxiliary agent comprises a retarder and / or a rust inhibitor.

[0089] In the present application, the cement is one or more of P.O42.5 cement, P·Ⅱ52.5 cement and R·SAC42.5 cement.

[0090] In the present application, the mass fraction of the base is preferably 90-92%, for example, 91%, and the percentage refers to the mass ratio of the mass of the base to the mass of the steel slag modifier.

[0091] In the present application, the base is preferably 2-5 parts, for example, 2.73 parts or 3.64 parts.

[0092] In the present application, the mass fraction of the auxiliary agent is preferably 7-12%, for example, 9%, and the percentage refers to the mass ratio of the mass of the auxiliary agent to the mass of the steel slag modifier.

[0093] In the present application, the auxiliary agent is preferably 0.1-3 parts, more preferably 0.1-1 part, for example, 0.27 parts or 0.36 parts.

[0094] In the present application, the retarder is a substance capable of prolonging the workability time of the steel slag asphalt mixture, and the retarder can be sodium gluconate, for example, the retarder available from Shandong Qiansheng Chemical Co., Ltd.

[0095] In the present application, the mass fraction of the retarder is preferably 2-4%, for example, 3%, and the percentage refers to the mass ratio of the mass of the retarder to the mass of the steel slag modifier.

[0096] The retarder is preferably 0.05-0.2 parts, for example 0.09 parts or 0.12 parts.

[0097] The retarder is preferably 0.05-0.2 parts, for example 0.09 parts or 0.12 parts.

[0098] The retarder is preferably 0.05-0.2 parts, for example 0.09 parts or 0.12 parts.

[0099] The retarder is preferably 0.05-0.2 parts, for example 0.09 parts or 0.12 parts.

[0100] The retarder is preferably 0.05-0.2 parts, for example 0.09 parts or 0.12 parts.

[0101] The retarder is preferably 0.05-0.2 parts, for example 0.09 parts or 0.12 parts.

[0102] The retarder is preferably 0.05-0.2 parts, for example 0.09 parts or 0.12 parts.

[0103] The steel slag asphalt mixture raw material composition in the application can further include water.

[0104] The water is preferably 4-8 parts, for example 5 parts.

[0105] The steel slag asphalt mixture raw material composition in the application is preferably composed of the following components in the following mass fractions: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, surfactant 3-8 parts;

[0106] The modified emulsified asphalt is composed of the following components in the following mass fractions: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts;

[0107] Alternatively, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts;

[0108] Alternatively, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts.

[0109] The steel slag asphalt mixture raw material composition in the application preferably consists of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, and water 4-8 parts;

[0110] The modified emulsified asphalt consists of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, and defoaming agent 0.5-2 parts;

[0111] Alternatively, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, and water 40-70 parts;

[0112] Alternatively, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, and water 40-70 parts.

[0113] The steel slag asphalt mixture raw material composition in the application preferably consists of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 5 parts, modified emulsified asphalt 27 parts, surfactant OP-10 5 parts, and water 5 parts;

[0114] The modified emulsified asphalt consists of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, phosphoric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0115] The steel slag asphalt mixture raw material composition in the application preferably consists of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 4 parts, modified emulsified asphalt 30 parts, surfactant OP-10 5 parts, and water 5 parts;

[0116] The modified emulsified asphalt consists of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, phosphoric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0117] In the application, the raw material composition of the steel slag asphalt mixture is preferably composed of the following components in mass fraction: 100 parts of blast furnace steel slag, 3 parts of steel slag modifier, 25 parts of modified emulsified asphalt of Example 1, 5 parts of surfactant OP-10, and 5 parts of water.

[0118] The modified emulsified asphalt is composed of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of phosphoric acid, and 60 parts of deionized water; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0119] In the application, the raw material composition of the steel slag asphalt mixture is preferably composed of the following components in mass fraction: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt, 5 parts of surfactant OP-10, and 5 parts of water.

[0120] The modified emulsified asphalt is composed of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of hydrochloric acid, and 60 parts of deionized water; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0121] In the application, the raw material composition of the steel slag asphalt mixture is preferably composed of the following components in mass fraction: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt, 5 parts of surfactant OP-10, and 5 parts of water.

[0122] The modified emulsified asphalt is composed of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of hydrochloric acid, and 60 parts of deionized water; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331.

[0123] In the application, the raw material composition of the steel slag asphalt mixture is preferably composed of the following components in mass fraction: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt, 5 parts of surfactant AEO-9, and 5 parts of water.

[0124] The modified emulsified asphalt is composed of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of hydrochloric acid, and 60 parts of deionized water; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331.

[0125] The application also provides a steel slag asphalt mixture, which comprises the following components in mass fraction: 100 parts of steel slag, 2-8 parts of steel slag modifier, 20-40 parts of the aforementioned modified emulsified asphalt, and 3-8 parts of surfactant.

[0126] The steel slag, the steel slag modifier, and the modified emulsified asphalt are the steel slag, the steel slag modifier, and the modified emulsified asphalt in the aforementioned raw material composition of the steel slag asphalt mixture.

[0127] In the application, the steel slag asphalt mixture can further comprise water, preferably 4-8 parts, for example 5 parts.

[0128] In the application, the initial wear resistance of the steel slag asphalt mixture can be 4700-6300 g / m -2 .

[0129] In the application, the workable time of the steel slag asphalt mixture is preferably ≥4 min, for example 4-6 min.

[0130] In the application, the curing time of the steel slag asphalt mixture is preferably ≤33 min, for example 26-33 min.

[0131] In the application, the steel slag asphalt mixture is preferably composed of the following components in mass fraction: 100 parts of the steel slag, 2-8 parts of the steel slag modifier, 20-40 parts of the modified emulsified asphalt, and 3-8 parts of the surfactant.

[0132] The modified emulsified asphalt is composed of the following components in mass fraction: 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, and 0.5-2 parts of defoaming agent.

[0133] Alternatively, 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, and 40-70 parts of water.

[0134] Alternatively, 100 parts of base asphalt, 15-20 parts of EVA, 0.1-0.5 parts of stabilizer, 1.5-5 parts of emulsifier, 0.5-2 parts of defoaming agent, 0.1-0.2 parts of pH regulator, and 40-70 parts of water.

[0135] The steel slag asphalt mixture is preferably composed of the following components in mass fraction: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, and water 4-8 parts.

[0136] The modified emulsified asphalt is composed of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, and defoaming agent 0.5-2 parts.

[0137] Alternatively, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, and water 40-70 parts.

[0138] Alternatively, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, and water 40-70 parts.

[0139] The steel slag asphalt mixture is preferably composed of the following components in mass fraction: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, and water 4-8 parts; the modified emulsified asphalt is composed of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, and water 40-70 parts; and the initial wear resistance of the steel slag asphalt mixture is 4700-6300 g / m -2 , the operation time is greater than or equal to 4 min, and the curing time is less than or equal to 33 min.

[0140] The steel slag asphalt mixture is preferably composed of the following components in mass fraction: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, and water 4-8 parts.

[0141] The modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, phosphoric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0142] The steel slag asphalt mixture preferably consists of the following components in mass fraction: 100 parts of blast furnace steel slag, 4 parts of steel slag modifier, 30 parts of modified emulsified asphalt, 5 parts of surfactant OP-10, and 5 parts of water.

[0143] The modified emulsified asphalt consists of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of phosphoric acid, and 60 parts of deionized water; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0144] The steel slag asphalt mixture preferably consists of the following components in mass fraction: 100 parts of blast furnace steel slag, 3 parts of steel slag modifier, 25 parts of modified emulsified asphalt of Example 1, 5 parts of surfactant OP-10, and 5 parts of water.

[0145] The modified emulsified asphalt consists of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of phosphoric acid, and 60 parts of deionized water; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0146] The steel slag asphalt mixture preferably consists of the following components in mass fraction: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt, 5 parts of surfactant OP-10, and 5 parts of water.

[0147] The modified emulsified asphalt consists of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of hydrochloric acid, and 60 parts of deionized water; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151.

[0148] The steel slag asphalt mixture preferably consists of the following components in mass fraction: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt, 5 parts of surfactant OP-10, and 5 parts of water.

[0149] The modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, hydrochloric acid 0.1 part, deionized water 60 parts; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331.

[0150] In the present application, the steel slag asphalt mixture is preferably composed of the following components in mass fraction: blast furnace slag 100 parts, steel slag modifier 5 parts, modified emulsified asphalt 27 parts, surfactant AEO-9 5 parts, and water 5 parts.

[0151] The modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, hydrochloric acid 0.1 part, deionized water 60 parts; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331.

[0152] The present application also provides a preparation method of the steel slag asphalt mixture, which comprises the following steps: mixing the aforementioned steel slag, the steel slag modifier, the modified emulsified asphalt and the surfactant to obtain the steel slag asphalt mixture.

[0153] In the present application, the preparation method of the steel slag asphalt mixture preferably comprises: mixing the steel slag and the surfactant, then adding the steel slag modifier for premixing to obtain a premix, and then mixing the premix with the modified emulsified asphalt to obtain the steel slag asphalt mixture.

[0154] Preferably, the mixing time of the steel slag and the surfactant is 3-6 min.

[0155] Preferably, the steel slag and the surfactant are mixed under stirring. Preferably, the stirring speed is 50-80 r / min.

[0156] Preferably, the premixing time is 3-6 min.

[0157] Preferably, the premixing is mixed under stirring. Preferably, the stirring speed is 50-80 r / min.

[0158] Preferably, the mixing is slow stirring to prevent the emulsified asphalt from breaking during the mixing.

[0159] Preferably, the stirring speed of the mixing is not more than 50-60 r / min.

[0160] The mixing time is preferably no more than 1 min. Too short mixing time will result in uneven mixing of the materials, and too long mixing time will result in premature demulsification of the emulsified asphalt.

[0161] The application further discloses a steel slag asphalt mixture prepared by the preparation method of the steel slag asphalt mixture.

[0162] In the application, the initial wear resistance of the steel slag asphalt mixture can be 4700-6300 g / m -2 .

[0163] In the application, the workable time of the steel slag asphalt mixture is preferably greater than or equal to 4 min, for example, 4-6 min.

[0164] In the application, the curing time of the steel slag asphalt mixture is preferably less than or equal to 33 min, for example, 26-33 min.

[0165] The application further provides an application of the steel slag asphalt mixture in thin-layer asphalt mixture or high-difference repairing material, and the steel slag asphalt mixture is the aforementioned steel slag asphalt mixture.

[0166] The positive progress effect of the application is that:

[0167] (1) The modified emulsified asphalt has high solid content, good storage stability, low viscosity (Engler less than 10), strong asphalt workability, good construction convenience and excellent comprehensive performance.

[0168] (2) The steel slag asphalt mixture can improve the phenomenon that the existing steel slag and asphalt mixture are prone to instant demulsification; the workable time of the steel slag asphalt mixture is greatly improved, the curing time is reduced, and the strength after curing is maintained, specifically: the steel slag asphalt mixture has basically the same performance as the commercially available basalt asphalt mixture, the workable time is extended under the premise of shortening the curing time as much as possible, the workable time of the final product is about 5 min, the curing time is about 30 min, and the wear resistance is better than that of the basalt asphalt mixture.

[0169] (3) Compared with the commercially available basalt asphalt mixture, the steel slag asphalt mixture has a more favorable price ratio: according to the price of repairing 1 m 2 , the price of the steel slag asphalt mixture is reduced by 8.3-30.3% compared with the basalt asphalt mixture, and the price advantage is more significant. DETAILED DESCRIPTION

[0170] The application will be further described by way of examples, but the application is not limited to the examples. In the following examples, the experimental methods not specified in the examples are selected according to the conventional methods and conditions or the product instructions.

[0171] The raw material model or source in the following examples is as follows:

[0172] Emulsifier Wuhan Shuer Biological Technology Co., Ltd., model whshuer Defoamer Huizhou Huashengyuan Material Co., Ltd. DL-151; Guangdong Zhongke Hongtai New Material Co., Ltd. B-331 EVA Japan Toagosei 68590 # Road petroleum asphalt Zhenhai 90 asphalt, 25℃, 0.1mm penetration 90, softening point 45℃, 5℃ ductility 40 cm, purchased from Sinopec Zhenhai Refining and Chemical Co., Ltd. 70 # road petroleum asphalt Zhenhai 70 asphalt, 25℃, 0.1mm penetration 70, softening point 45℃, 5℃ ductility 20 cm, purchased from Sinopec Zhenhai Refining and Chemical Co., Ltd. OP-10 Nanjing Chemical Reagent Co., Ltd. Blast furnace slag Lingzhou County Chenyang Mineral Products Co., Ltd. Rust inhibitor Xica Co., Ltd. 901C Retarder Shandong Qiansheng Chemical Co., Ltd., main component sodium gluconate Antifreeze Langfang Longke Energy Saving Technology Co., Ltd., main component sodium chloride

[0173] Example 1

[0174] The modified emulsified asphalt disclosed in this embodiment, the raw material includes the following mass fraction of components: 100 parts of 90 # road petroleum asphalt, 16 parts of EVA, 2 parts of emulsifier, 1 part of viscosity reducer, 1 part of defoamer, 0.1 part of anhydrous calcium chloride, 0.1 part of phosphoric acid, 60 parts of deionized water; the design solid content is 60%;

[0175] The preparation method of the modified emulsified asphalt includes the following steps:

[0176] (1) Preparation of modified asphalt: 90 # road petroleum asphalt is heated to 160℃, then EVA is added and swelled for 15 min, a high-speed shear instrument is started to stir at a speed of 2000r / min and the temperature is raised, when the temperature rises to 180℃, the speed is increased to 5000r / min for shearing for 30 min, then anhydrous calcium chloride is added and sheared for 20 min, after stopping shearing, it is kept at 200℃ for 2h to obtain modified asphalt;

[0177] (2) Preparation of soap solution: water is heated to 50-60℃, then emulsifier is added and stirred uniformly, then phosphoric acid is used to adjust the pH value to 1-2 to obtain the soap solution;

[0178] (3) Preparation of modified emulsified asphalt: a high-speed shear instrument is started to stir the soap solution at a speed of 2000r / min for 60s, then it is increased to 7000r / min, the mixture of modified asphalt of step (1) and defoamer is added to the soap solution and sheared for 5 min, then it is quickly transferred to a preheated colloid mill at 60℃ for grinding for 40s at a grinding speed of 3500r / min to obtain the modified emulsified asphalt.

[0179] Example 2

[0180] The modified emulsified asphalt disclosed in the embodiment has the following components by mass fraction: 100 parts of 70# road petroleum asphalt, 16 parts of EVA, 3 parts of emulsifier, 1.5 parts of defoaming agent, 0.2 parts of anhydrous calcium chloride, 0.1 part of phosphoric acid, and 50 parts of deionized water; and the design solid content is 61%.

[0181] The preparation method of the modified emulsified asphalt comprises the following steps:

[0182] (1) Preparation of modified asphalt: 70# road petroleum asphalt is heated to 160℃, then EVA is added and swelled for 20 min, a high-speed shearing instrument is started to stir at a speed of 1500 r / min and heated, when the temperature rises to 185℃, the speed is increased to 5500 r / min for shearing for 25 min, then anhydrous calcium chloride is added and sheared for 25 min, after stopping shearing, the temperature is kept at 210℃ for 2 h to obtain modified asphalt;

[0183] (2) Preparation of soap solution: water is heated to 50-60℃, then the emulsifier is added and stirred uniformly, and then the pH value is adjusted to 1-2 by using phosphoric acid to obtain a soap solution;

[0184] (3) Preparation of modified emulsified asphalt: the soap solution is stirred at a speed of 2500 r / min for 60 s by starting the high-speed shearing instrument, then the speed is increased to 7500 r / min, the mixture of modified asphalt and defoaming agent in step (1) is added into the soap solution and sheared for 5 min, then the mixture is quickly transferred to a colloidal mill preheated at 60℃ for grinding for 45 s at a grinding speed of 4000 r / min to obtain modified emulsified asphalt.

[0185] Example 3

[0186] The modified emulsified asphalt disclosed in the embodiment has the following components by mass fraction: 100 parts of 70# road petroleum asphalt, 16 parts of EVA, 3 parts of emulsifier, 1.5 parts of defoaming agent, 0.2 parts of anhydrous calcium chloride, 0.1 part of phosphoric acid, and 50 parts of deionized water; and the design solid content is 61%.

[0187] The preparation method of the modified emulsified asphalt comprises the following steps:

[0188] (1) Preparation of modified asphalt: 70# road petroleum asphalt is heated to 160℃, then EVA is added and swelled for 20 min, a high-speed shearing instrument is started to stir at a speed of 1500 r / min and heated, when the temperature rises to 185℃, the speed is increased to 5500 r / min for shearing for 25 min, then anhydrous calcium chloride is added and sheared for 25 min, after stopping shearing, the temperature is kept at 210℃ for 2 h to obtain modified asphalt;

[0189] (2) Preparation of soap solution: after heating water to 50-60℃, add emulsifier and stir until uniform, then adjust pH to 1-2 with phosphoric acid to obtain soap solution;

[0190] (3) Preparation of modified emulsified asphalt: start high-speed shearing instrument, stir soap solution at 3000r / min for 60s, then increase to 8500r / min, add mixture of modified asphalt and defoaming agent to soap solution and shear for 10min, then quickly transfer to preheated colloid mill at 60℃ and grind for 35s at 3000r / min to obtain modified emulsified asphalt.

[0191] Example 1

[0192] The actual solid content, storage stability, sieve residue (1.18mm) and Engler viscosity of the modified emulsified asphalt in Examples 1-3 are tested, and the results are shown in Table 1.

[0193] The storage stability is tested by T0655-1993, which meets 1 day≤1%, 5 days≤5%, indicating that the storage stability is stable.

[0194] The sieve residue is mainly used to evaluate the precipitation phenomenon of the modified emulsified asphalt, which is tested by T0652-1993.

[0195] Group Actual solid content 1d storage stability 5d storage stability Sieve residue (1.18mm) Engler viscosity Example 1 6 stable stable 0.03 5.8 Example 2 8 stable stable 0.06 7.8 Example 3 5 stable stable 0.04 6.6

[0196] As can be seen from the test results in Table 1, the modified emulsified asphalt prepared in the above examples has high solid content, good storage stability, low viscosity (Engler less than 10), strong asphalt operability, good construction convenience and excellent comprehensive performance.

[0197] Example 4

[0198] The steel slag asphalt mixture raw material composition disclosed in this example comprises the following components in mass fraction: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt of Example 1, 5 parts of surfactant OP-10 and 5 parts of water.

[0199] The particle size composition of the steel slag is: 8 parts of steel slag with particle size of 0.15-1.18mm, 24 parts of steel slag with particle size of 1.18-2.36mm and 48 parts of steel slag with particle size of 1-3mm.

[0200] The steel slag modifier is a mixture of 4.55 parts of P.O42.5 cement, 0.15 parts of retarder, 0.15 parts of rust inhibitor and 0.15 parts of antifreeze.

[0201] The preparation method of the steel slag asphalt mixture comprises the following steps:

[0202] (1) at room temperature, the steel slag is mixed with water and a surfactant OP-10, the mixing time is 3 min, and the mixing speed is 70 r / min, then a steel slag modifier is added and mixed, the mixing time is 3 min, and the mixing speed is 70 r / min, to obtain modified steel slag;

[0203] (2) the modified steel slag is mixed with modified emulsified asphalt in a slow stirring manner, wherein the stirring speed is 55 r / min, and the mixing time is 50 s, to obtain the steel slag asphalt mixture.

[0204] Example 5

[0205] The steel slag asphalt mixture raw material composition disclosed in the embodiment comprises the following components in mass fractions: 100 parts of blast furnace steel slag, 4 parts of a steel slag modifier, 30 parts of the modified emulsified asphalt of Example 1, 5 parts of a surfactant OP-10, and 5 parts of water.

[0206] The particle size composition of the steel slag comprises 8 parts of steel slag with a particle size of 0.15-1.18 mm, 23 parts of steel slag with a particle size of 1.18-2.36 mm, and 44 parts of steel slag with a particle size of 1-3 mm.

[0207] The steel slag modifier is a mixture of 3.64 parts of P·Ⅱ5 2.5 cement, 0.12 parts of a retarder, 0.12 parts of a rust inhibitor, and 0.12 parts of an antifreeze agent, wherein the rust inhibitor, the retarder, and the antifreeze agent are the same as those in Example 4.

[0208] The preparation method of the steel slag asphalt mixture comprises the following steps:

[0209] (1) at room temperature, the steel slag is mixed with water and a surfactant, the mixing time is 3 min, and the mixing speed is 70 r / min, then a steel slag modifier is added and mixed, the mixing time is 4 min, and the mixing speed is 70 r / min, to obtain modified steel slag;

[0210] (2) the modified steel slag is mixed with modified emulsified asphalt in a slow stirring manner, wherein the stirring speed is 50 r / min, and the mixing time is 55 s, to obtain the steel slag asphalt mixture.

[0211] Example 6

[0212] The steel slag asphalt mixture raw material composition disclosed in the embodiment comprises the following components in mass fractions: 100 parts of blast furnace steel slag, 3 parts of a steel slag modifier, 25 parts of the modified emulsified asphalt of Example 1, 5 parts of a surfactant OP-10, and 5 parts of water.

[0213] The particle size composition of the steel slag is 7 parts of steel slag with a particle size of 0.15-1.18 mm, 21 parts of steel slag with a particle size of 1.18-2.36 mm, and 42 parts of steel slag with a particle size of 1-3 mm.

[0214] The steel slag modifier is a mixture of 2.73 parts of R·SAC 42.5 cement, 0.09 parts of a retarder, 0.09 parts of a rust inhibitor, and 0.09 parts of an anti-freezing agent, wherein the rust inhibitor, the retarder, and the anti-freezing agent are the same as in Example 4.

[0215] The preparation method of the steel slag asphalt mixture comprises the following steps:

[0216] (1) At room temperature, the steel slag is mixed with water and a surfactant at a mixing speed of 70 r / min for 3 min, and then a steel slag modifier is added and mixed at a mixing speed of 70 r / min for 5 min, to obtain modified steel slag;

[0217] (2) The modified steel slag is mixed with modified emulsified asphalt at a slow stirring speed of 52 r / min for 57 s, to obtain a steel slag asphalt mixture.

[0218] Example 7

[0219] The difference between this example and Example 4 is that the pH regulator in this example is 5% hydrochloric acid. The other raw materials, steps, and process parameters are the same.

[0220] Example 8

[0221] The steel slag asphalt mixture of this example differs from that of Example 4 in that the defoaming agent in the modified emulsified asphalt is B-331 from Guangdong Zhongke Hongtai New Material Co., Ltd.

[0222] Example 9

[0223] The difference between this example and Example 4 is that the surfactant in this example is AEO-9. The other raw materials, steps, and process parameters are the same.

[0224] Comparative Example 1

[0225] The difference between this comparative example and Example 4 is that EVA is replaced by SBS. The other raw materials, steps, and process parameters are the same.

[0226] Comparative Example 2

[0227] The difference between this comparative example and Example 4 is that there is no defoaming agent in the raw material components of the modified emulsified asphalt in this comparative example. The other raw materials, steps, and process parameters are the same.

[0228] Comparative Example 3

[0229] The difference between this embodiment and embodiment 4 is that there is no OP-10 in the raw material composition of the steel slag asphalt mixture.

[0230] Effect Example 2

[0231] The workability time, curing time, initial wear resistance and fluidity of the steel slag asphalt mixture in examples 4-8 and comparative examples 1-3 were tested. The results are shown in Table 2.

[0232] (1) The test method for workability time is ASTM D217-10 cone penetration test

[0233] Test method: Penetrate the asphalt mixture with the standard cone by its own gravity for 5 s, and test the penetration depth.

[0234] Result characterization: The time required from the start of curing to the penetration of 250 (0.1 mm) is considered as the workability time, which corresponds to the time from the start of mixing emulsified asphalt with stone to the loss of fluidity of the mixture during construction. At present, the workability time of commercially available products is about 2-5 min (temperature range 10-40°C).

[0235] (2) The test method for curing time is also ASTM D217-10 cone penetration test

[0236] Test method: Penetrate the asphalt mixture with the standard cone by its own gravity for 5 s, and test the penetration depth.

[0237] Result characterization: The time from the start of curing to the penetration of 100 (0.1 mm) is considered as the curing time.

[0238] (3) The test method for initial wear resistance is wet wheel abrasion test

[0239] Initial wear resistance test method: Prepare the sample at 20°C and cure for 1 h, and test the abrasion value to evaluate the initial wear resistance of the material.

[0240] Table 2

[0241] Group Workability time / min Curing time / min Initial wear resistance / g / m -2 Example 4 315300 Example 5 335200 Example 6 529100 Example 7 529300 Example 8 426700 Example 9 430500 Comparative Example 1 230100 Comparative Example 2 230800 Comparative Example 3 225460.

Claims

1. A steel slag asphalt mixture raw material composition, characterized by, It comprises the following components by mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, surfactant 3-8 parts; The modified emulsified asphalt comprises the following components by mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.08-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts.

2. The steel slag asphalt mixture raw material composition according to claim 1, characterized in that, The base asphalt is No. 70 road petroleum asphalt and / or No. 90 road petroleum asphalt; And / or, the content of VA in the EVA is 25-27%, for example, 26%; And / or, the weight average molecular weight of the EVA is 1000-3000, for example, 2000, and the EVA is preferably Japanese Toaso 685; And / or, the emulsifier is a medium-split cationic asphalt emulsifier, which is preferably stearyl amidopropyl dimethylamine, for example, emulsifier of Wuhan Shuer Biological Technology Co., Ltd. with model number whshuer; And / or, the stabilizer is an inorganic stabilizer and / or an organic stabilizer, the inorganic stabilizer is preferably calcium chloride and / or ammonium chloride, and the organic stabilizer is preferably methyl cellulose and / or polyacrylamide; And / or, the defoaming agent is a fluorine-containing non-ionic surfactant compound with a hydroxyl compound, for example, DL-151 of Huizhou Huashengyuan Material Co., Ltd. or B-331 of Guangdong Zhongke Hongtai New Material Co., Ltd.; And / or, the EVA is 15-17 parts, for example, 16 parts; And / or, the stabilizer is 0.1-0.2 parts, for example, 0.1 parts or 0.2 parts; And / or, the emulsifier is 2-3 parts, for example, 2 parts or 3 parts; And / or, the defoaming agent is 1-1.5 parts, for example, 1 part or 1.5 parts; And / or, the pH of the system formed after mixing of the components in the modified emulsified asphalt raw material composition is 1-2, and the pH value of the system is preferably adjusted by a pH adjuster, the pH adjuster is preferably 0.1-0.2 parts, for example, 0.1 parts or 0.15 parts; the pH adjuster is preferably phosphoric acid, and the concentration of the phosphoric acid is preferably 3-7%, for example, 5%; And / or, the modified emulsified asphalt raw material composition further comprises water, and the water is preferably 40-70 parts, for example, 50 parts or 60 parts.

3. The steel slag asphalt mixture raw material composition according to claim 1, wherein, The surfactant is a non-ionic surfactant, which is preferably a polyoxyethylene ether non-ionic surfactant or an amide non-ionic surfactant, the polyoxyethylene ether non-ionic surfactant is preferably an alkyl phenol polyoxyethylene ether or a fatty alcohol polyoxyethylene ether, for example, OP-10 or AEO-9, and the amide non-ionic surfactant is preferably coconut oil fatty acid diethanolamide, for example, 6501; And / or, the steel slag is one of electric furnace steel slag, blast furnace steel slag or converter steel slag. and / or, the steel slag includes 5-11% steel slag with particle size of 0.15-1.18mm, 30-40% steel slag with particle size of 1.18-2.36mm and 55-65% steel slag with particle size of 1-3mm in percentage of mass, for example, 10% steel slag with particle size of 0.15-1.18mm, 30% steel slag with particle size of 1.18-2.36mm and 60% steel slag with particle size of 1-3mm; and / or, the surfactant is 4-6 parts, for example, 5 parts; and / or, the steel slag modifier is 3-5 parts, for example, 3 parts, 4 parts or 5 parts; the modified emulsified asphalt is 25-30 parts, for example, 25 parts, 27 parts or 30 parts; and / or, the steel slag modifier includes a base and an auxiliary agent, the base is cement and / or lime, and the auxiliary agent includes a retarder and / or a rust inhibitor; wherein the cement is preferably one or more of P.O42.5 cement, P·Ⅱ52.5 cement and R·SAC42.5 cement, the base is preferably 2-5 parts, for example, 2.73 parts, 3.64 parts or 4.55 parts, and the auxiliary agent is preferably 0.1-3 parts, more preferably 0.1-1 parts, for example, 0.27 parts, 0.36 parts or 0.45 parts; the retarder is preferably sodium gluconate, and the rust inhibitor is preferably sodium chloride; and / or, the steel slag asphalt mixture raw material composition further includes water, and the water is preferably 4-8 parts, for example, 5 parts.

4. The steel slag asphalt mixture raw material composition according to claim 1, wherein, The steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, surfactant 3-8 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, surfactant 3-8 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, surfactant 3-8 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; wherein, the modified emulsified asphalt is composed of the following components in mass fraction: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; wherein, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; wherein, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; wherein, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; wherein, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 3 parts, modified emulsified asphalt 25 parts, surfactant OP-10 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, phosphoric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toosa 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 5 parts, modified emulsified asphalt 27 parts, surfactant OP-10 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, hydrochloric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toosa 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 5 parts, modified emulsified asphalt 27 parts, surfactant OP-10 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, hydrochloric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toosa 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331; Alternatively, the steel slag asphalt mixture raw material composition is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 5 parts, modified emulsified asphalt 27 parts, surfactant AEO-9 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, hydrochloric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toosa 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331.

5. A steel slag asphalt mixture, characterized by, It comprises the following components in mass fraction: steel slag 100 parts, steel slag modifier 2-8 parts, modified emulsified asphalt 20-40 parts, and surfactant 3-8 parts; The steel slag, the steel slag modifier, the modified emulsified asphalt, and the surfactant are the steel slag, the steel slag modifier, the modified emulsified asphalt, and the surfactant in the steel slag asphalt mixture raw material composition according to any one of claims 1-4.

6. The steel slag asphalt mixture as claimed in claim 5, wherein, The steel slag asphalt mixture also comprises water, preferably 4-8 parts, for example 5 parts; And / or, the initial abrasion resistance of the steel slag asphalt mixture is 4700-6300 g / m -2 ; And / or, the workable time of the steel slag asphalt mixture is ≥4 min, for example 4-6 min; And / or, the curing time of the steel slag asphalt mixture is ≤33 min, for example 26-33 min.

7. The steel slag asphalt mixture as claimed in claim 5, wherein, The steel slag asphalt mixture is composed of the following components in mass parts: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts; Wherein, the modified emulsified asphalt is composed of the following components in mass parts: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Or, the steel slag asphalt mixture is composed of the following components in mass parts: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; The modified emulsified asphalt is composed of the following components in mass parts: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Alternatively, the steel slag asphalt mixture is composed of the following components in parts by mass: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, and water 4-8 parts; the modified emulsified asphalt is composed of the following components in parts by mass: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, and water 40-70 parts; the initial wear resistance of the steel slag asphalt mixture is 4700-6300 g / m -2 The workable time is ≥4 min, and the curing time is ≤33 min. Or, the steel slag asphalt mixture is composed of the following components in mass parts: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; The modified emulsified asphalt is composed of the following components in mass parts: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Or, the steel slag asphalt mixture is composed of the following components in mass parts: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; The modified emulsified asphalt is composed of the following components in mass parts: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Or, the steel slag asphalt mixture is composed of the following components in mass parts: the steel slag 100 parts, the steel slag modifier 2-8 parts, the modified emulsified asphalt 20-40 parts, the surfactant 3-8 parts, water 4-8 parts; The modified emulsified asphalt is composed of the following components in mass parts: base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, water 40-70 parts; Or, base asphalt 100 parts, EVA 15-20 parts, stabilizer 0.1-0.5 parts, emulsifier 1.5-5 parts, defoaming agent 0.5-2 parts, pH regulator 0.1-0.2 parts, water 40-70 parts; Or, the steel slag asphalt mixture is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 4 parts, modified emulsified asphalt 30 parts, surfactant OP-10 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, phosphoric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151; Or, the steel slag asphalt mixture is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 3 parts, modified emulsified asphalt 25 parts, surfactant OP-10 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, phosphoric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Huizhou Huashengyuan Material Co., Ltd. DL-151; Or, the steel slag asphalt mixture is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 5 parts, modified emulsified asphalt 27 parts, surfactant OP-10 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, hydrochloric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331; Or, the steel slag asphalt mixture is composed of the following components in mass fraction: blast furnace steel slag 100 parts, steel slag modifier 5 parts, modified emulsified asphalt 27 parts, surfactant OP-10 5 parts, and water 5 parts; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 90# road petroleum asphalt 100 parts, EVA 16 parts, anhydrous calcium chloride 0.1 part, emulsifier 2 parts, defoaming agent 1 part, hydrochloric acid 0.1 part, and deionized water 60 parts; the EVA is Japan Toagosei 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331; Alternatively, the steel slag asphalt mixture is preferably composed of the following components in mass fraction: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt, 5 parts of surfactant AEO-9, and 5 parts of water; wherein the modified emulsified asphalt is composed of the following components in mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 part of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoaming agent, 0.1 part of hydrochloric acid, and 60 parts of deionized water; the EVA is Japan Toaso 685, the emulsifier is Wuhan Shuer Biological Technology Co., Ltd. whshuer, and the defoaming agent is Guangdong Zhongke Hongtai New Material Co., Ltd. B-331.

8. A method for preparing a steel slag asphalt mixture, characterized by, It comprises the following steps: mixing the steel slag, the steel slag modifier, the modified emulsified asphalt, and the surfactant in the steel slag asphalt mixture raw material composition of any one of claims 1-4 to obtain a steel slag asphalt mixture; The preparation method of the steel slag asphalt mixture preferably comprises: mixing the steel slag and the surfactant, then adding the steel slag modifier for premixing to obtain a premix, and then mixing the premix with the modified emulsified asphalt to obtain the steel slag asphalt mixture; Preferably, the mixing time of the steel slag and the surfactant is 3-6 min; Preferably, the steel slag and the surfactant are mixed under stirring, and the stirring speed is preferably 50-80 r / min; Preferably, the premixing is mixed under stirring, the stirring speed is 50-80 r / min, and the premixing time is preferably 3-6 min; The stirring speed of the mixing is preferably not more than 50-60 r / min.

9. A steel slag asphalt mixture prepared by the preparation method of the steel slag asphalt mixture according to claim 8.

10. The use of a steel slag asphalt mixture in thin layer asphalt mixtures or differential repair materials, characterized in that, The steel slag asphalt mixture is the steel slag asphalt mixture according to any one of claims 5-7 or the steel slag asphalt mixture according to claim 9.