Preparation method and product of modified asphalt

A technology of modified asphalt and matrix asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of affecting the softening point of asphalt, easily polluting the environment, etc. short time effect

Inactive Publication Date: 2016-08-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a preparation method and product of modified asphalt, the purpose of which is to modify the asphalt by electron beam irradiation, thereby solving the problem of using stabilizers in the prior art. The softening point of asphalt is a technical problem that is easy to pollute the environment

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  • Preparation method and product of modified asphalt
  • Preparation method and product of modified asphalt
  • Preparation method and product of modified asphalt

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preparation example Construction

[0027] The invention provides a kind of preparation method of modified asphalt, comprises the following steps:

[0028] (1) Heat the base asphalt to 160°C to 190°C, based on 100 parts by mass of the base asphalt, add 2 to 8 parts of styrene-butadiene-styrene block copolymer (SBS) , 0 to 9 parts of compatibilizer are mixed with base asphalt, and sheared at a speed of 4000rpm to 8000rpm for 0.5h to 3h to make them fully mixed;

[0029] (2) spreading the modified asphalt primary material with a thickness of 3 mm to 10 mm;

[0030] (3) Utilize the electron beam that the dosage is 30kGy~800kGy (that is, the electron beam energy that per kg modified asphalt raw material absorbs is 30kJoule~800kJoule) electron beam is irradiated to the modified asphalt primary material after spreading, obtains described modified asphalt.

[0031] Between the step (1) and the step (2), it is also possible to: stir and develop the modified asphalt primary material at a speed of 100rpm-300rpm for 2h-8...

Embodiment 1

[0037] A modified bitumen, including SBS 1301 and No. 50 base bitumen, prepared by electron beam irradiation. The SBS1301 is dispersed in the base asphalt, and its addition amount is 2.5 parts based on 100 parts by mass of the base asphalt. The SBS 1301 has a linear structure with a molecular weight of 80,000 to 110,000, an average polystyrene segment content of 30 wt%, and an irradiation dose of 60 kGy.

[0038] The preparation method of described modified asphalt specifically comprises the following steps:

[0039] (1) Heat 500g of base asphalt to 160°C, add 12.5g of SBS 1301 to the base asphalt, cut at 4000rpm for 0.5 hours, so that SBS is evenly dispersed in the base asphalt; raise and keep the temperature at 170°C, 150rpm Continue mechanical stirring for 3 hours to obtain the primary material of SBS modified asphalt;

[0040] (2) spreading the SBS modified asphalt primary material that step (1) obtains, obtaining the SBS modified asphalt spreading material that thicknes...

Embodiment 2

[0043] A modified bitumen, including SBS 1301-1 and No. 70 base bitumen, prepared by electron beam irradiation. The SBS 1301-1 is dispersed in the base asphalt, and its addition amount is 5.0 parts based on 100 parts by mass of the base asphalt. The SBS 1301-1 has a linear structure with a molecular weight of 100,000 to 130,000, an average content of polystyrene segments of 30 wt%, and a radiation dose of 390 kGy.

[0044] The preparation method of described modified asphalt specifically comprises the following steps:

[0045] (1) Heat 500g of base asphalt to 165°C, add 25.0g of SBS 1301-1 to the base asphalt, and cut at 4500rpm for 1.0 hour, so that SBS is evenly dispersed in the base asphalt, and the primary material of SBS modified asphalt is obtained;

[0046] (2) spreading the SBS modified asphalt primary material that step (1) obtains, obtaining the SBS modified asphalt spreading material that thickness is 4mm;

[0047] (3) The SBS modified asphalt spreading material o...

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Abstract

The invention discloses a preparation method and product of modified asphalt. The preparation method includes: by the total weight of matrix asphalt being 100 parts, evenly mixing 2-8 parts of styrene-butadiene-styrene segmented copolymer and 0-9 parts of compatibilizer with the matrix asphalt, and stirring for development for 0-8 hours to obtain primary modified asphalt material; spreading the primary modified asphalt material; irradiating the primary modified asphalt material with an electron beam with the dose rate being 30-800kGy to obtain the modified asphalt. The preparation method has the advantages that the asphalt is modified through electron beam irradiation instead of adding stabilizer, adverse effects on the other properties of the product are avoided, the problem that the stabilizer in the prior art easily pollutes environments is solved, and the prepared asphalt satisfy the requirements of I-D types polymer modified asphalt in JTG F40-2004 road asphalt pavement construction technical specifications.

Description

technical field [0001] The invention belongs to the field of modified asphalt, and more specifically relates to a preparation method and product of modified asphalt. Background technique [0002] Petroleum asphalt is widely used in road paving, waterproofing and sealing because of its excellent adhesion, water resistance and plasticity, as well as abundant resources and low price. However, due to the relatively low molecular weight of asphalt and its wide distribution, the mechanical properties show obvious temperature sensitivity—brittle at low temperature, easy to flow at high temperature, and almost inelastic and easy to age. The scope of use of petroleum asphalt. [0003] The modification of polymer materials is an effective way to reduce the temperature sensitivity of asphalt materials, enhance the mechanical properties and improve the anti-aging ability. The polymers used for the modification of petroleum asphalt mainly include three categories: thermoplastic rubber,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08L95/00C08L53/02
CPCC08J3/28C08J2395/00C08J2453/02C08L95/00C08L2201/08C08L2205/03C08L53/02
Inventor 解孝林文颖峰周兴平孙绍发李晓静施雪军陈超
Owner HUAZHONG UNIV OF SCI & TECH
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