Steel slag asphalt mixture raw material composition, steel slag asphalt mixture and its preparation and application

Abstract

This invention discloses a steel slag asphalt mixture raw material composition, a steel slag asphalt mixture, and its preparation and application. The steel slag asphalt mixture raw material composition comprises the following components in parts by weight: 100 parts steel slag, 2-8 parts steel slag modifier, 20-40 parts modified emulsified asphalt, and 3-8 parts surfactant. The modified emulsified asphalt comprises the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.08-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer. The steel slag asphalt mixture of this invention significantly improves the workability time, reduces the curing time, and maintains the strength after curing.

Description

Technical Field

[0001] This invention relates to a steel slag asphalt mixture raw material composition, steel slag asphalt mixture, and its preparation and application. Background Technology

[0002] In recent years, road maintenance has gradually shifted from a construction-centric approach to a maintenance-centric approach. During road maintenance, localized elevation differences at locations such as bridge expansion joints, around manhole covers, and uneven settlement at bridge abutments seriously affect road safety and driving comfort, and also adversely impact the service life of vehicles, roads, and bridges. Furthermore, once elevation differences occur, the stress-strain response under vehicle loads becomes complex.

[0003] Currently, the traditional repair materials are mainly basalt asphalt mixtures. These materials are not only expensive, but also prone to secondary damage, causing repeated elevation differences and making them unsuitable for restoring road surface smoothness and ensuring driving safety.

[0004] Due to its unique chemical properties and excellent characteristics, steel slag is increasingly being used in road construction and maintenance. Currently, commercially available emulsified asphalt (such as BCR emulsified asphalt) has poor compatibility with steel slag. Problems include long demulsification and curing times without modifiers, resulting in insufficient strength after curing; and instant demulsification with modifiers, leading to insufficient workability. The main reason for this is that when commercially available modified emulsified asphalt is mixed with steel slag, the cationic emulsifier in the asphalt adsorbs the negative charge in the steel slag modifier (mainly cement), causing instant demulsification of the emulsified asphalt. However, the strength of the mixture of emulsified asphalt, steel slag, and cement has not yet been formed, requiring a considerable waiting time. Therefore, there is an urgent need for a modified emulsified asphalt suitable for steel slag aggregate, as well as a steel slag asphalt mixture that is low-cost, easy to construct (mainly reflected in a longer workability time and shorter curing time), and has excellent durability. Summary of the Invention

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

[0006] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0007] The present invention provides a modified emulsified asphalt raw material composition comprising the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.08-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer.

[0008] In this invention, the base asphalt can be a conventional base asphalt in the art, such as No. 70 road petroleum asphalt and / or No. 90 road petroleum asphalt.

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

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

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

[0012] In this invention, the weight-average molecular weight of the EVA is preferably 1000-3000, for example 2000, and the EVA is more preferably Tosoh 685.

[0013] In this invention, the emulsifier is preferably a medium-cracking cationic asphalt emulsifier. The medium-cracking cationic asphalt emulsifier is preferably stearamidopropyl dimethylamine, such as the whshuer emulsifier from Wuhan Shuer Biotechnology Co., Ltd.

[0014] In this invention, the stabilizer is an inorganic stabilizer and / or an organic stabilizer, wherein the inorganic stabilizer is preferably calcium chloride and / or ammonium chloride, and the organic stabilizer is preferably methylcellulose and / or polyacrylamide.

[0015] In this invention, the defoamer is preferably 1 to 1.5 parts, for example, 1 part or 1.5 parts.

[0016] In this invention, the defoamer is a conventional defoamer in the field, preferably a fluorinated nonionic surfactant with hydroxyl compound, such as DL-151 from Huizhou Huashengyuan Materials Co., Ltd. or B-331 from Guangdong Zhongke Hongtai New Materials Co., Ltd.

[0017] In this invention, the EVA is preferably 15 to 17 parts, for example 16 parts.

[0018] In this invention, the stabilizer is preferably 0.1 to 0.2 parts, for example, 0.1 parts or 0.2 parts.

[0019] In this invention, the emulsifier is preferably 2 to 3 parts, for example, 2 or 3 parts.

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

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

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

[0023] In this invention, the modified emulsified asphalt raw material composition may further include water.

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

[0025] In this invention, the modified emulsified asphalt raw material composition preferably consists of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer.

[0026] In this invention, the modified emulsified asphalt raw material composition preferably consists of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, and 40-70 parts water.

[0027] In this invention, the modified emulsified asphalt raw material composition is composed of the following components in parts by weight: 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 defoamer, 0.1-0.2 parts of pH adjuster, and 40-70 parts of water.

[0028] In this invention, the modified emulsified asphalt raw material composition comprises the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0029] In this invention, the modified emulsified asphalt raw material composition comprises the following components in parts by weight: 100 parts of 70# road petroleum asphalt, 16 parts of EVA, 0.2 parts of anhydrous calcium chloride, 3 parts of emulsifier, 1.5 parts of defoamer, 0.1 parts of phosphoric acid, and 50 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0030] In this invention, the modified emulsified asphalt raw material composition comprises the following components in parts by weight: 100 parts base asphalt, 16 parts EVA, 0.1 parts anhydrous calcium chloride, 3 parts emulsifier, 1 part defoamer, 0.15 parts phosphoric acid, and 50 parts deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0031] This invention provides a modified emulsified asphalt, comprising the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.08-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer;

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

[0033] In this invention, the pH of the modified emulsified asphalt is preferably 1 to 2.

[0034] In this invention, the modified emulsified asphalt may further include water. Preferably, the water content is 40-70 parts, for example, 50 or 60 parts.

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

[0036] In this invention, the Englar viscosity of the modified emulsified asphalt is preferably 3 to 30, more preferably 3 to 10, for example 5.8, 6.6 or 7.8.

[0037] In this invention, the modified emulsified asphalt is preferably composed of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer.

[0038] In this invention, the modified emulsified asphalt is preferably composed of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, and 40-70 parts water.

[0039] In this invention, the modified emulsified asphalt is preferably composed of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, 0.1-0.2 parts pH adjuster, and 40-70 parts water.

[0040] In this invention, the modified emulsified asphalt preferably consists of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, 0.1-0.2 parts pH adjuster, and 40-70 parts water; the modified emulsified asphalt preferably has a solid content of 60-70% and an Engler viscosity of 3-30.

[0041] In this invention, the modified emulsified asphalt is preferably composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0042] In this invention, the modified emulsified asphalt is preferably composed of the following components in parts by weight: 100 parts of 70# road petroleum asphalt, 16 parts of EVA, 0.2 parts of anhydrous calcium chloride, 3 parts of emulsifier, 1.5 parts of defoamer, 0.1 parts of phosphoric acid, and 50 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0043] In this invention, the modified emulsified asphalt is preferably composed of the following components in parts by weight: 100 parts base asphalt, 16 parts EVA, 0.1 parts anhydrous calcium chloride, 3 parts emulsifier, 1 part defoamer, 0.15 parts phosphoric acid, and 50 parts deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0044] The present invention also provides a method for preparing modified emulsified asphalt, which includes the following steps: mixing the raw material components in the aforementioned modified emulsified asphalt raw material composition to obtain modified emulsified asphalt.

[0045] In this invention, the method for preparing the modified emulsified asphalt preferably includes the following steps:

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

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

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

[0049] When the modified emulsified asphalt raw material composition also includes the aforementioned defoamer, in step (3), the defoamer and the modified asphalt are added to the soap solution simultaneously;

[0050] When the modified emulsified asphalt raw material composition also includes the aforementioned water, in step (2), the method for preparing the soap solution includes: mixing the water with the emulsifier to form an emulsifier solution, adjusting the pH value of the emulsifier solution to 1-2, and obtaining the soap solution.

[0051] In step (1), the method for preparing the modified asphalt may include the following steps: heating the base asphalt and mixing it with the EVA for a first swelling, and then mixing it with the stabilizer for a second swelling to obtain the modified asphalt.

[0052] The method for preparing the modified asphalt more preferably includes: heating the base asphalt to a certain temperature, adding the EVA for a first swelling, stirring at a certain speed and raising the temperature, increasing the speed to a second speed for a first shear when the temperature reaches a second temperature, adding a stabilizer for a second shear, stopping the shear and then performing a second swelling to obtain the modified asphalt.

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

[0054] The swelling time for one time is preferably 15 to 30 minutes, for example, 15 minutes, 20 minutes or 30 minutes.

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

[0056] The secondary swelling time is preferably 1.5 to 2.5 hours, for example, 2 hours.

[0057] The temperature of the aforementioned section is preferably 160–180°C, for example, 160°C.

[0058] The preferred rotational speed range is 1000–2000 r / min, for example, 1000 r / min, 1500 r / min or 2000 r / min.

[0059] The temperature of the two sections is preferably 180-200°C, for example, 180°C, 185°C or 190°C.

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

[0061] The time for a single shearing is preferably 20 to 60 minutes, for example, 20 minutes, 25 minutes or 30 minutes.

[0062] The time for the second shearing is preferably 20 to 30 minutes, for example, 15 minutes, 20 minutes or 30 minutes.

[0063] The stirring device can be conventional in the art, such as a high-speed shear apparatus.

[0064] In this invention, in step (3), the preparation method of the modified emulsified asphalt can be conventional in the art, preferably including: stirring the soap solution, adding the modified asphalt to the soap solution, performing three shearing operations, grinding the sheared mixture, and obtaining the modified emulsified asphalt.

[0065] The preferred method for stirring the soap solution includes: first stirring the soap solution at three speeds, and then increasing the speed to four speeds.

[0066] The three speed ranges are preferably 2000–3000 r / min, for example, 2000 r / min, 2500 r / min or 3000 r / min.

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

[0068] The four speed ranges are preferably 7000–8500 r / min, for example, 7000 r / min, 7500 r / min or 8500 r / min.

[0069] The time for the three shearing operations is preferably 5 to 10 minutes, for example, 5 minutes or 10 minutes.

[0070] The grinding temperature is preferably 50-70°C, for example 60°C.

[0071] The grinding speed is preferably 2000-4000 r / min, for example 3000 r / min, 3500 r / min or 4000 r / min.

[0072] The grinding time is preferably 30 to 45 seconds, for example, 35 seconds, 40 seconds or 45 seconds.

[0073] In this invention, when the modified emulsified asphalt raw material composition also includes water, in step (2), during the preparation of the soap solution, the mixing temperature is 50-60°C. Preferably, the method for mixing the water and the emulsifier includes: heating the water to 50-60°C before adding the emulsifier.

[0074] The present invention also provides modified emulsified asphalt prepared by the aforementioned method for preparing modified emulsified asphalt.

[0075] In this invention, the solid content of the modified emulsified asphalt is preferably 60-70%, for example 65%, 66% or 68%.

[0076] In this invention, the Englar viscosity of the modified emulsified asphalt is preferably 3 to 30, more preferably 3 to 10, for example 5.8, 6.6 or 7.8.

[0077] In this invention, the modified emulsified asphalt is preferably used as a mixing emulsified asphalt in cold-mixed steel slag asphalt mixtures.

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

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

[0080] In this invention, the surfactant is preferably a nonionic surfactant. The nonionic surfactant is preferably a polyoxyethylene ether-based nonionic surfactant or an amide-based nonionic surfactant.

[0081] Preferably, the polyoxyethylene ether nonionic surfactant is an alkylphenol polyoxyethylene ether or a fatty alcohol polyoxyethylene ether, such as OP-10, and such as AEO-9.

[0082] The amide-based nonionic surfactant is preferably coconut oil fatty acid diethanolamide, such as 6501.

[0083] In this invention, the surfactant is preferably 4 to 6 parts, for example 5 parts.

[0084] In this invention, the steel slag can be conventional in the art, such as one of electric furnace steel slag, blast furnace steel slag or converter steel slag.

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

[0086] In this invention, the steel slag modifier is preferably 3 to 5 parts, for example, 3 parts, 4 parts or 5 parts.

[0087] In this invention, the modified emulsified asphalt is preferably 25 to 30 parts, for example 25 parts, 27 parts or 30 parts.

[0088] In this invention, the steel slag modifier preferably includes a matrix and additives, wherein the matrix is ​​cement and / or lime, and the additives include retarder and / or rust inhibitor;

[0089] The cement is one or more of P.O42.5 cement, P·Ⅱ52.5 cement and R·SAC42.5 cement.

[0090] The mass fraction of the matrix is ​​preferably 90-92%, for example 91%, where the percentage refers to the mass ratio of the matrix to the mass of the steel slag modifier.

[0091] The matrix is ​​preferably 2 to 5 parts, for example 2.73 parts or 3.64 parts.

[0092] The mass fraction of the additive is preferably 7-12%, for example 9%, where the percentage refers to the mass ratio of the additive to the steel slag modifier.

[0093] The auxiliary agent is preferably 0.1 to 3 parts, more preferably 0.1 to 1 part, for example 0.27 parts or 0.36 parts.

[0094] The retarder is a conventional substance in the art that can improve the workability of steel slag asphalt mixture. The retarder may be sodium gluconate, for example, a retarder purchased from Shandong Qiansheng Chemical Co., Ltd.

[0095] The retarder has a preferred mass fraction of 2-4%, for example 3%, where the percentage refers to the mass ratio of the retarder to the steel slag modifier.

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

[0097] The rust inhibitor is a conventional substance in the art that can reduce the reaction between chloride ions, sulfate ions, etc. and metal ions in steel slag. It can be a composite amino alcohol rust inhibitor, such as Sika 901C.

[0098] The mass fraction of the rust inhibitor is preferably 2-4%, for example 3%, where the percentage refers to the mass ratio of the rust inhibitor to the steel slag modifier.

[0099] The rust inhibitor is preferably 0.05 to 0.2 parts, for example, 0.09 parts or 0.12 parts.

[0100] The additives may further include antifreeze. The antifreeze is a conventional substance in the art that enables steel slag asphalt mixtures to achieve the desired performance at low temperatures. The antifreeze may be sodium chloride, such as the antifreeze from Langfang Longke Energy Saving Technology Co., Ltd.

[0101] The mass fraction of the antifreeze is preferably 2-4%, for example 3%, where the percentage refers to the mass ratio of the antifreeze to the mass of the steel slag modifier.

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

[0103] In this invention, the steel slag asphalt mixture raw material composition may further include water.

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

[0105] In this invention, the steel slag asphalt mixture raw material composition preferably consists of the following components in parts by weight: 100 parts steel slag, 2-8 parts steel slag modifier, 20-40 parts modified emulsified asphalt, and 3-8 parts surfactant.

[0106] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer;

[0107] Alternatively, the mixture consists of 100 parts base bitumen, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, and 40-70 parts water.

[0108] Alternatively, the mixture consists of 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, 0.1-0.2 parts pH adjuster, and 40-70 parts water.

[0109] In this invention, the steel slag asphalt mixture raw material composition preferably consists of the following components in parts by weight: 100 parts steel slag, 2-8 parts steel slag modifier, 20-40 parts modified emulsified asphalt, 3-8 parts surfactant, and 4-8 parts water.

[0110] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer;

[0111] Alternatively, the mixture consists of 100 parts base bitumen, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, and 40-70 parts water.

[0112] Alternatively, the mixture consists of 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, 0.1-0.2 parts pH adjuster, and 40-70 parts water.

[0113] In this invention, the steel slag asphalt mixture raw material composition is preferably composed of the following components in parts by weight: 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.

[0114] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0115] In this invention, the steel slag asphalt mixture raw material composition is preferably composed of the following components in parts by weight: 100 parts blast furnace steel slag, 4 parts steel slag modifier, 30 parts modified emulsified asphalt, 5 parts surfactant OP-10, and 5 parts water.

[0116] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0117] In this invention, the steel slag asphalt mixture raw material composition is preferably composed of the following components in parts by weight: 100 parts of blast furnace steel slag, 3 parts of steel slag modifier, 25 parts of modified emulsified asphalt from 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 parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0119] In this invention, the steel slag asphalt mixture raw material composition is preferably composed of the following components in parts by weight: 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 parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of hydrochloric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0121] In this invention, the steel slag asphalt mixture raw material composition is preferably composed of the following components in parts by weight: 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 parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of hydrochloric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is B-331 from Guangdong Zhongke Hongtai New Materials Co., Ltd.

[0123] In this invention, the steel slag asphalt mixture raw material composition is preferably composed of the following components in parts by weight: 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 parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of hydrochloric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is B-331 from Guangdong Zhongke Hongtai New Materials Co., Ltd.

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

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

[0127] In this invention, the steel slag asphalt mixture may further include water. Preferably, the water content is 4 to 8 parts, for example, 5 parts.

[0128] In this invention, the initial abrasion resistance of the steel slag asphalt mixture can be 4700–6300 g / m³. -2 .

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

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

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

[0132] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer;

[0133] Alternatively, the mixture consists of 100 parts base bitumen, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, and 40-70 parts water.

[0134] Alternatively, the mixture consists of 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, 0.1-0.2 parts pH adjuster, and 40-70 parts water.

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

[0136] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, and 0.5-2 parts defoamer;

[0137] Alternatively, the mixture consists of 100 parts base bitumen, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, and 40-70 parts water.

[0138] Alternatively, the mixture consists of 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, 0.1-0.2 parts pH adjuster, and 40-70 parts water.

[0139] In this invention, the steel slag asphalt mixture preferably comprises the following components in parts by weight: 100 parts steel slag, 2-8 parts steel slag modifier, 20-40 parts modified emulsified asphalt, 3-8 parts surfactant, and 4-8 parts water; the modified emulsified asphalt comprises the following components in parts by weight: 100 parts base asphalt, 15-20 parts EVA, 0.1-0.5 parts stabilizer, 1.5-5 parts emulsifier, 0.5-2 parts defoamer, 0.1-0.2 parts pH adjuster, and 40-70 parts water; the initial abrasion resistance of the steel slag asphalt mixture is 4700-6300 g / m³. -2 The working time is ≥4 min, and the curing time is ≤33 min.

[0140] In this invention, the steel slag asphalt mixture is preferably composed of the following components in parts by weight: 100 parts blast furnace steel slag, 5 parts steel slag modifier, 27 parts modified emulsified asphalt, 5 parts surfactant OP-10, and 5 parts water.

[0141] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0142] In this invention, the steel slag asphalt mixture is preferably composed of the following components in parts by weight: 100 parts blast furnace steel slag, 4 parts steel slag modifier, 30 parts modified emulsified asphalt, 5 parts surfactant OP-10, and 5 parts water.

[0143] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0144] In this invention, the steel slag asphalt mixture is preferably composed of the following components in parts by weight: 100 parts blast furnace steel slag, 3 parts steel slag modifier, 25 parts modified emulsified asphalt of Example 1, 5 parts surfactant OP-10, and 5 parts water.

[0145] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0146] In this invention, the steel slag asphalt mixture is preferably composed of the following components in parts by weight: 100 parts blast furnace steel slag, 5 parts steel slag modifier, 27 parts modified emulsified asphalt, 5 parts surfactant OP-10, and 5 parts water.

[0147] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of hydrochloric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is DL-151 from Huizhou Huashengyuan Materials Co., Ltd.

[0148] In this invention, the steel slag asphalt mixture is preferably composed of the following components in parts by weight: 100 parts blast furnace steel slag, 5 parts steel slag modifier, 27 parts modified emulsified asphalt, 5 parts surfactant OP-10, and 5 parts water.

[0149] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of hydrochloric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is B-331 from Guangdong Zhongke Hongtai New Materials Co., Ltd.

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

[0151] The modified emulsified asphalt is composed of the following components in parts by weight: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 0.1 parts of anhydrous calcium chloride, 2 parts of emulsifier, 1 part of defoamer, 0.1 parts of hydrochloric acid, and 60 parts of deionized water; the EVA is Tosoh 685 from Japan, the emulsifier is whshuer from Wuhan Shuer Biotechnology Co., Ltd., and the defoamer is B-331 from Guangdong Zhongke Hongtai New Materials Co., Ltd.

[0152] The present invention also provides a method for preparing steel slag asphalt mixture, which includes the following steps: mixing the aforementioned steel slag, the steel slag modifier, the modified emulsified asphalt and the surfactant to obtain steel slag asphalt mixture.

[0153] In this invention, the preparation method of the steel slag asphalt mixture preferably includes: mixing the steel slag with 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] The mixing time between the steel slag and the surfactant is preferably 3 to 6 minutes.

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

[0156] The premixing time is preferably 3 to 6 minutes.

[0157] The premixing is preferably carried out under stirring. The stirring speed is preferably 50-80 r / min.

[0158] The mixing process is preferably slow to prevent the emulsified asphalt from breaking down during the mixing process.

[0159] The mixing speed is preferably no more than 50-60 r / min.

[0160] The mixing time should preferably not exceed 1 minute. Too short a mixing time will result in uneven mixing of the materials, while too long a mixing time will cause the emulsified asphalt to break down prematurely.

[0161] The present invention also discloses the steel slag asphalt mixture prepared by the aforementioned method for preparing steel slag asphalt mixture.

[0162] In this invention, the initial abrasion resistance of the steel slag asphalt mixture can be 4700–6300 g / m³. -2 .

[0163] In this invention, the workable time of the steel slag asphalt mixture is preferably ≥4 min, for example 4 to 6 min.

[0164] In this invention, the curing time of the steel slag asphalt mixture is preferably ≤33 min, for example 26 to 33 min.

[0165] The present invention also provides an application of steel slag asphalt mixture in thin-layer asphalt mixture or elevation difference repair material, wherein the steel slag asphalt mixture is the aforementioned steel slag asphalt mixture.

[0166] The positive and progressive effects of this invention are as follows:

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

[0168] (2) The steel slag asphalt mixture of the present invention can improve the phenomenon that instantaneous demulsification easily occurs after the existing steel slag and asphalt mixture is mixed; the working time of the steel slag asphalt mixture of the present invention is greatly improved, while the curing time is reduced and the strength after curing is maintained. Specifically, the various properties of the steel slag asphalt mixture of the present invention are basically equivalent to those of commercially available basalt asphalt mixture. Under the premise of shortening the curing time as much as possible, the working time is extended. The working time of the final product is about 5 minutes, the curing time is about 30 minutes, and the wear resistance is better than that of basalt asphalt mixture.

[0169] (3) Compared with commercially available basalt asphalt mixtures, the steel slag asphalt mixture of the present invention has a better price-performance ratio: based on the repair cost of 1m³ / day... 2 The price of the steel slag asphalt mixture of the present invention is 8.3-30.3% lower than that of basalt asphalt mixture, and its price advantage is more significant. Detailed Implementation

[0170] The present invention is further illustrated below by way of embodiments, but the invention is not limited to the scope of the embodiments described herein. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product instructions.

[0171] The raw materials used in the following examples are of the following types or sources:

[0172]

[0173] Example 1

[0174] This embodiment discloses a modified emulsified asphalt, the raw materials of which include the following components by mass fraction: 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 parts of anhydrous calcium chloride stabilizer, 0.1 parts of phosphoric acid, and 60 parts of deionized water; the designed solid content is 60%.

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

[0176] (1) Preparation of modified asphalt: After heating 90# road petroleum asphalt to 160℃, EVA was added to swell for 15min. The high-speed shearing machine was started and stirred at 2000r / min while heating. When the temperature reached 180℃, the speed was increased to 5000r / min and sheared for 30min. Then anhydrous calcium chloride was added and sheared for 20min. After stopping the shearing, the temperature was kept at 200℃ for 2h to swell, and the modified asphalt was obtained.

[0177] (2) Preparation of soap solution: After heating water to 50-60℃, add emulsifier and stir evenly, then adjust the pH value to 1-2 with phosphoric acid to obtain soap solution;

[0178] (3) Preparation of modified emulsified asphalt: Start the high-speed shearing machine and stir the soap solution at 2000 r / min for 60s, then increase it to 7000 r / min. Add the mixture of modified asphalt and defoamer from step (1) to the soap solution and shear for 5min. After shearing, quickly transfer it to a colloid mill preheated at 60℃ and grind for 40s at a grinding speed of 3500 r / min to obtain modified emulsified asphalt.

[0179] Example 2

[0180] This embodiment discloses a modified emulsified asphalt, the raw materials of which include 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 defoamer, 0.2 parts of anhydrous calcium chloride, 0.1 parts of phosphoric acid, and 50 parts of deionized water; the designed solid content is 61%.

[0181] The preparation method of the above-mentioned modified emulsified asphalt includes the following steps:

[0182] (1) Preparation of modified asphalt: After heating 70# road petroleum asphalt to 160℃, EVA was added to swell for 20min. The high-speed shearing machine was started and stirred at 1500r / min while heating. When the temperature reached 185℃, the speed was increased to 5500r / min and sheared for 25min. Then anhydrous calcium chloride was added and sheared for 25min. After stopping the shearing, the temperature was kept at 210℃ for 2h to swell, and the modified asphalt was obtained.

[0183] (2) Preparation of soap solution: After heating water to 50-60℃, add emulsifier and stir evenly, then adjust the pH value to 1-2 with phosphoric acid to obtain soap solution;

[0184] (3) Preparation of modified emulsified asphalt: Start the high-speed shearing machine and stir the soap solution at 2500 r / min for 60s, then increase it to 7500 r / min. Add the mixture of modified asphalt and defoamer from step (1) to the soap solution and shear for 5min. After shearing, quickly transfer it to a colloid mill preheated at 60℃ and grind for 45s at a grinding speed of 4000 r / min to obtain modified emulsified asphalt.

[0185] Example 3

[0186] This embodiment discloses a modified emulsified asphalt, the raw materials of which include the following components by mass fraction: 100 parts of 90# road petroleum asphalt, 16 parts of EVA, 3 parts of emulsifier, 2 parts of viscosity reducer, 1 part of defoamer, 0.1 parts of anhydrous calcium chloride, 0.15 parts of phosphoric acid, and 50 parts of deionized water; the designed solid content is 62%.

[0187] The preparation method of the above-mentioned modified emulsified asphalt includes the following steps:

[0188] (1) Preparation of modified asphalt: After heating 90# road petroleum asphalt to 160℃, add star-shaped EMS to swell for 30min. Start the high-speed shearing machine and stir at 1000r / min while heating. When the temperature rises to 190℃, increase the speed to 4000r / min and shear for 20min. Then add anhydrous calcium chloride and shear for 30min. After stopping the shearing, keep it at 190℃ for 2h to swell and obtain modified asphalt.

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

[0190] (3) Preparation of modified emulsified asphalt: Start the high-speed shearing machine and stir the soap solution at 3000 r / min for 60 s, then increase it to 8500 r / min, add the mixture of modified asphalt and defoamer to the soap solution and shear for 10 min. After shearing, quickly transfer it to a colloid mill preheated at 60℃ and grind for 35 s at a grinding speed of 3000 r / min to obtain modified emulsified asphalt.

[0191] Example 1

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

[0193] Storage stability was tested using T0655-1993, and the results showed that the storage stability was ≤1% for 1 day and ≤5% for 5 days.

[0194] The amount remaining on the sieve is mainly used to evaluate the sedimentation phenomenon of modified emulsified asphalt, and the test is conducted according to T0652-1993.

[0195] Table 1

[0196]

[0197] As can be seen from the test results in Table 1, the modified emulsified asphalt prepared in the above embodiments of the present invention has a high solid content, good storage stability, low viscosity (Engela less than 10), strong asphalt workability, good construction convenience, and excellent comprehensive performance.

[0198] Example 4

[0199] This embodiment discloses a steel slag asphalt mixture raw material composition, which includes the following components in parts by weight: 100 parts of blast furnace steel slag, 5 parts of steel slag modifier, 27 parts of modified emulsified asphalt from Example 1, 5 parts of surfactant OP-10, and 5 parts of water.

[0200] The steel slag has the following particle size composition: 8 parts of steel slag with a particle size of 0.15-1.18 mm, 24 parts of steel slag with a particle size of 1.18-2.36 mm, and 48 parts of steel slag with a particle size of 1-3 mm.

[0201] The steel slag modifier is a mixture of 4.55 parts P.O42.5 cement, 0.15 parts retarder, 0.15 parts rust inhibitor and 0.15 parts antifreeze.

[0202] The preparation method of the above-mentioned steel slag asphalt mixture includes the following steps:

[0203] (1) At room temperature, steel slag is mixed with water and surfactant OP-10 for 3 minutes and 70 r / min. Then steel slag modifier is added and mixed for 3 minutes and 70 r / min to obtain modified steel slag.

[0204] (2) The modified steel slag and modified emulsified asphalt are mixed by slow stirring, wherein the stirring speed is 55 r / min and the mixing time is 50 s to obtain steel slag asphalt mixture.

[0205] Example 5

[0206] This embodiment discloses a steel slag asphalt mixture raw material composition, which includes the following components in parts by weight: 100 parts of blast furnace steel slag, 4 parts of steel slag modifier, 30 parts of modified emulsified asphalt from Example 1, 5 parts of surfactant OP-10, and 5 parts of water.

[0207] The particle size composition of the steel slag is as follows: 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.

[0208] The steel slag modifier is a mixture of 3.64 parts of P·Ⅱ52.5 cement, 0.12 parts of retarder, 0.12 parts of rust inhibitor and 0.12 parts of antifreeze, wherein the rust inhibitor, retarder and antifreeze are the same as in Example 4.

[0209] The preparation method of the above-mentioned steel slag asphalt mixture includes the following steps:

[0210] (1) At room temperature, steel slag is mixed with water and surfactant for 3 minutes and 70 r / min. Then steel slag modifier is added and mixed for 4 minutes and 70 r / min to obtain modified steel slag.

[0211] (2) The modified steel slag and modified emulsified asphalt are mixed by slow stirring, wherein the stirring speed is 50 r / min and the mixing time is 55 s to obtain steel slag asphalt mixture.

[0212] Example 6

[0213] This embodiment discloses a steel slag asphalt mixture raw material composition, which includes the following components in parts by weight: 100 parts of blast furnace steel slag, 3 parts of steel slag modifier, 25 parts of modified emulsified asphalt from Example 1, 5 parts of surfactant OP-10, and 5 parts of water.

[0214] The steel slag has the following particle size composition: 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.

[0215] The steel slag modifier is a mixture of 2.73 parts R·SAC42.5 cement, 0.09 parts retarder, 0.09 parts rust inhibitor, and 0.09 parts antifreeze, wherein the rust inhibitor, retarder, and antifreeze are the same as in Example 4.

[0216] The preparation method of the above-mentioned steel slag asphalt mixture includes the following steps:

[0217] (1) At room temperature, steel slag is mixed with water and surfactant for 3 minutes and 70 r / min. Then steel slag modifier is added and mixed for 5 minutes and 70 r / min to obtain modified steel slag.

[0218] (2) The modified steel slag and modified emulsified asphalt are mixed by slow stirring, wherein the stirring speed is 52r / min and the mixing time is 57s, to obtain steel slag asphalt mixture.

[0219] Example 7

[0220] The only difference between this embodiment and Embodiment 4 is that the pH adjuster in this embodiment is 5% hydrochloric acid. All other raw materials, steps, and process parameters are the same.

[0221] Example 8

[0222] The difference between the steel slag asphalt mixture in this embodiment and that in Example 4 is that the defoamer in the modified emulsified asphalt is B-331 from Guangdong Zhongke Hongtai New Materials Co., Ltd.

[0223] Example 9

[0224] The only difference between this embodiment and Example 4 is that the surfactant in this embodiment is AEO-9. All other raw materials, steps, and process parameters are the same.

[0225] Comparative Example 1

[0226] The only difference between this comparative example and Example 4 is that EVA is replaced with SBS. All other raw materials, steps, and process parameters are the same.

[0227] Comparative Example 2

[0228] The only difference between this comparative example and Example 4 is that the modified emulsified asphalt in this comparative example does not contain defoamer. All other raw materials, steps, and process parameters are the same.

[0229] Comparative Example 3

[0230] The difference between this embodiment and embodiment 4 is that the steel slag asphalt mixture raw material composition does not contain OP-10.

[0231] Example 2

[0232] The workability, curing time, initial abrasion resistance, and flowability of the steel slag asphalt mixtures in Examples 4-8 and Comparative Examples 1-3 were tested. The results are shown in Table 2.

[0233] (1) The working time test method is ASTM D217-10 cone penetration test.

[0234] Test method: The standard cone is driven into the asphalt mixture for 5 seconds by its own weight, and the penetration depth is tested.

[0235] Results Characterization: The time required from the start of curing to the cone penetration reaching 250 (0.1 mm) is considered the workable time, corresponding to the time from the start of mixing emulsified asphalt and aggregate during construction until the mixture loses its fluidity. Currently, the workable time of commercially available products is approximately 2 to 5 minutes (temperature range 10℃ to 40℃).

[0236] (2) The curing time test method is the same as the ASTM D217-10 cone penetration test.

[0237] Test method: The standard cone is driven into the asphalt mixture for 5 seconds by its own weight, and the penetration depth is tested.

[0238] Results characterization: The time from the start of curing until the cone penetration drops to 100 (0.1 mm) is considered the curing time.

[0239] (3) The initial wear resistance test method is the wet wheel wear test.

[0240] Initial wear resistance test method: Prepare the sample at 20℃ and cure for 1 hour, and test its wear value to evaluate the initial wear resistance of the material.

[0241] Table 2

[0242] Group Operable time / min Curing time / min <![CDATA[Initial wear resistance / g / m -2 > Example 4 6 31 5300 Example 5 5 33 5200 Example 6 5 29 5100 Example 7 5 29 6300 Example 8 4 26 4700 Example 9 4 30 5000 Comparative Example 1 2 30 4100 Comparative Example 2 2 30 4800 Comparative Example 3 2 25 4600 .

Claims

1. A steel slag asphalt mixture, 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, and surfactant 3-8 parts; The steel slag modifier comprises a base and an auxiliary agent, the base is cement and / or lime, and the auxiliary agent comprises a retarder and / or a rust inhibitor; 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, and defoaming agent 0.5-2 parts; The surfactant is a non-ionic surfactant, and the emulsifier is a medium-split cationic asphalt emulsifier.

2. The steel slag asphalt mixture of claim 1, wherein, 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%; And / or, the weight average molecular weight of the EVA is 1000-3000; And / or, the medium-split cationic asphalt emulsifier is stearyl amidopropyl dimethylamine; And / or, the stabilizer is an inorganic stabilizer and / or an organic stabilizer; And / or, the defoaming agent is a fluorine-containing non-ionic surfactant combined with a hydroxyl compound; And / or, the EVA is 15-17 parts; And / or, the stabilizer is 0.1-0.2 parts; And / or, the emulsifier is 2-3 parts; And / or, the defoaming agent is 1-1.5 parts; And / or, the pH of the system formed after mixing of the components in the modified emulsified asphalt is 1-2, the pH value of the system is adjusted by a pH adjuster, the mass fraction of the pH adjuster is 0.1-0.2 parts; And / or, the modified emulsified asphalt further comprises water, and the mass fraction of the water is 40-70 parts.

3. The steel slag asphalt mixture as claimed in claim 2, wherein, The content of VA in the EVA is 26%; And / or, the weight average molecular weight of the EVA is 2000; And / or, the inorganic stabilizer is calcium chloride and / or ammonium chloride; And / or, the organic stabilizer is methyl cellulose and / or polyacrylamide; And / or, the EVA is 16 parts; And / or, the stabilizer is 0.1 parts or 0.2 parts; And / or, the emulsifier is 2 parts or 3 parts; And / or, the defoaming agent is 1 part or 1.5 parts; And / or, the mass fraction of the pH adjuster is 0.1 parts or 0.15 parts; And / or, the pH adjuster is phosphoric acid, and the concentration of the phosphoric acid is 3-7%; And / or, the mass fraction of the water is 50 parts or 60 parts.

4. The steel slag asphalt mixture as claimed in claim 3, wherein, The concentration of the phosphoric acid is 5%.

5. The steel slag asphalt mixture as claimed in claim 1, wherein, The non-ionic surfactant is a polyoxyethylene ether non-ionic surfactant or an amide non-ionic surfactant; And / or, the steel slag is one of electric furnace steel slag, blast furnace steel slag or converter steel slag; And / or, according to the mass percentage, the steel slag 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; And / or, the surfactant is 4-6 parts; And / or, the steel slag modifier is 3-5 parts; And / or, the modified emulsified asphalt is 25-30 parts; And / or, the cement is one or more of P.O 42.5 cement, P·Ⅱ 52.5 cement and R·SAC 42.5 cement; And / or, the base is 2-5 parts; And / or, the auxiliary agent is 0.1-3 parts; And / or, the retarder is sodium gluconate; And / or, the rust inhibitor is sodium chloride; And / or, the steel slag asphalt mixture further comprises water, and the water is 4-8 parts.

6. The steel slag asphalt mixture as claimed in claim 5, wherein, The polyoxyethylene ether nonionic surfactant is alkylphenol polyoxyethylene ether or fatty alcohol polyoxyethylene ether; And / or, the amide nonionic surfactant is coconut oil fatty acid diethanol amide; And / or, the steel slag comprises 10% steel slag with a particle size of 0.15-1.18 mm, 30% steel slag with a particle size of 1.18-2.36 mm and 60% steel slag with a particle size of 1-3 mm, according to mass percentage; And / or, the surfactant is 5 parts; And / or, the steel slag modifier is 3 parts, 4 parts or 5 parts; And / or, the modified emulsified asphalt is 25 parts, 27 parts or 30 parts; And / or, the base is 2.73 parts, 3.64 parts or 4.55 parts; And / or, the auxiliary agent is 0.27 parts, 0.36 parts or 0.45 parts; And / or, the water is 5 parts.

7. The steel slag asphalt mixture as claimed in claim 6, wherein, The alkylphenol polyoxyethylene ether is OP-10; And / or, the fatty alcohol polyoxyethylene ether is AEO-9.

8. The steel slag asphalt mixture as claimed in claim 1, wherein, The steel slag asphalt mixture is composed of the following components in mass parts: 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 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; Alternatively, the steel slag asphalt mixture is composed of the following components in mass parts: 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 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, water 40-70 parts; Alternatively, the steel slag asphalt mixture is composed of the following components in mass parts: 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 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, 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: 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; Or, the steel slag asphalt mixture 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; Or, the steel slag asphalt mixture 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; Or, the steel slag asphalt mixture 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; Or, the steel slag asphalt mixture 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; Or, the steel slag asphalt mixture 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 is 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; 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; Alternatively, the steel slag asphalt mixture is 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; 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; 9. The steel slag asphalt mixture as claimed in claim 1, wherein, 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. And / or, the curing time of the steel slag asphalt mixture is ≤33 min.

10. The steel slag asphalt mixture of claim 9, wherein the steel slag is present in an amount of 5 to 20% by weight of the total weight of the steel slag asphalt mixture. The workable time of the steel slag asphalt mixture is 4-6 min. And / or, the curing time of the steel slag asphalt mixture is 26-33 min.

11. A method of 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 according to any one of claims 1-10 to obtain a steel slag asphalt mixture.

12. The method for preparing steel slag asphalt mixture as described in claim 11, characterized in that, The preparation method of the steel slag asphalt mixture 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 and the modified emulsified asphalt to obtain the steel slag asphalt mixture.

13. The method for preparing steel slag asphalt mixture as described in claim 12, characterized in that, The mixing time of the steel slag and the surfactant is 3-6 min. And / or, the steel slag and the surfactant are mixed under stirring at a stirring speed of 50-80 r / min. And / or, the premixing is mixed under stirring at a stirring speed of 50-80 r / min. And / or, the premixing time is 3-6 min. And / or, the mixing speed is not more than 50-60 r / min.

14. 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 a steel slag asphalt mixture prepared by the preparation method of the steel slag asphalt mixture according to any one of claims 1-10 or any one of claims 11-13.

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