Modified asphalt for pouring asphalt concrete and preparation method thereof

A technology of asphalt concrete and modified asphalt, which is applied to building components, building insulation materials, buildings, etc., to achieve the effects of high strength and stiffness modulus, improved high temperature performance, high softening point and hardness

Inactive Publication Date: 2018-02-27
中石油燃料油有限责任公司研究院
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Problems solved by technology

[0003] The performance of cast asphalt concrete mainly depends on the properties of the modified asphalt used. The properties of traditional asphalt obtained directly from oil refineries cannot meet the needs of cast asphalt concrete, so asphalt must be properly modified. There are many types of permanent asphalt, but there is no polymer-modified asphalt for cast asphalt concrete

Method used

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  • Modified asphalt for pouring asphalt concrete and preparation method thereof
  • Modified asphalt for pouring asphalt concrete and preparation method thereof
  • Modified asphalt for pouring asphalt concrete and preparation method thereof

Examples

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preparation example Construction

[0038] The present invention also provides a method for preparing the above-mentioned modified asphalt, comprising: A) taking a reaction kettle, adding 70-93 parts by weight of base asphalt at a temperature of 140-190 ° C into the reaction kettle, adding 2-14 parts by weight Parts of modifying agent is added in the reaction kettle, and high shear is performed for 20-90 minutes at 1000-5000 rpm;

[0039]B) After the modifier is fully swollen, add 0.5-10 parts by weight of furfural extract oil into the reaction kettle, and continue shearing for 5-30 minutes at 1000-5000 rpm;

[0040] C) Add 0.05-0.3 parts by weight of a stabilizer to the reactor, cut at a speed of 1000-5000 rpm for 30 minutes, add 4-10 parts by weight of a viscosity accelerator to the reactor, and continue shearing The modified asphalt was obtained in 60 minutes.

[0041] Wherein, the base asphalt, modifier, viscosity accelerator, furfural extraction oil and stabilizer are all the same as above, and will not be...

Embodiment 1

[0045] Add 85.85 parts by weight of base asphalt at a temperature of 180-190° C. into the reactor, add 6 parts by weight of a modifier into the reactor, and perform high shear at 2500 rpm for 60 minutes;

[0046] After the modifier is fully swollen, the furfural extract oil of 4 parts by weight is added in the reaction kettle, and the shearing is continued for 15 minutes at 2500 rpm;

[0047] When the temperature of the base asphalt in the reaction kettle is 170-180°C, add 0.15 parts by weight of stabilizer into the reaction kettle, cut at a speed of 2500 rpm for 30 minutes, and add 4 parts by weight of a viscosity accelerator, and continue shearing for 60 minutes to obtain the modified asphalt.

[0048] The modified asphalt obtained in Example 1 was tested for performance, and the results are shown in Table 1.

[0049] Table 1

[0050]

Embodiment 2

[0052] Add 77.75 parts by weight of base asphalt at a temperature of 180-190° C. into the reactor, add 10 parts by weight of a modifier into the reactor, and perform high shear at 3500 rpm for 60 minutes;

[0053] After the modifying agent is fully swollen, the furfural extract oil of 7 parts by weight is added in the reaction kettle, and the shearing is continued for 25 minutes at 3500 rpm;

[0054] When the temperature of the base asphalt in the reaction kettle is 170-180°C, add 0.25 parts by weight of stabilizer into the reaction kettle, cut at a speed of 2500 rpm for 30 minutes, and add 5 parts by weight of a viscosity accelerator, and continue shearing for 60 minutes to obtain the modified asphalt.

[0055] The modified asphalt obtained in Example 2 was tested for performance, and the results are shown in Table 2.

[0056] Table 2

[0057]

[0058] From the results of Example 1 and Example 2, it can be seen that the modified asphalt for pouring asphalt concrete provi...

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Abstract

The invention discloses modified asphalt for pouring asphalt concrete and a preparation method thereof. The modified asphalt is prepared from substrate asphalt, a modifier viscosity promoter, furfuralextraction oil and a stabilizer. The pouring asphalt concrete provided by the application has the advantages of higher softening point, higher hardness, high elastic recovery and thermal aging performance and very high thermal storage stability. By adopting the high-performance high-viscosity asphalt provided by the invention, the high-temperature performance of the pouring modified asphalt concrete can be enhanced, the pouring modified asphalt concrete has high strength and stiffness moduli in a high-temperature state, the rut resistance is enhanced, the stress state of the whole pavement structure is improved, and the service life of a pouring asphalt concrete pavement is prolonged.

Description

technical field [0001] The invention relates to the technical field of asphalt preparation, in particular to a high-performance and high-viscosity modified asphalt for pouring asphalt concrete and a preparation method thereof. Background technique [0002] Pourable asphalt concrete is a special asphalt mixture with high asphalt content and high mineral powder content that is mixed at high temperature (about 220 ° C ~ 260 ° C), paved and shaped by its own fluidity, and does not need to be rolled. This material basically has no voids, is impermeable, has good corrosion resistance, and has strong freeze-thaw cycle resistance. It is the most durable asphalt mixture; it has excellent wear resistance; strong deformation ability, and is not easy to crack at low temperature; no need for construction. Rolling, construction can be carried out in low temperature environment. Therefore, this material is widely used in highway pavement, long-span bridge deck pavement, tunnel pavement an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L91/00C08L53/02C08L9/06
CPCC08L95/00C08L2201/08C08L2205/025C08L2205/035C08L91/00C08L53/02C08L9/06
Inventor 李剑新时敬涛赵磊袁野李玉环蒋福山刘瑾潼
Owner 中石油燃料油有限责任公司研究院
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