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Vegetable oil modified asphalt composite and preparation method thereof

A technology for vegetable oil modification and asphalt composition, which is applied in building structures, building components, building insulation materials, etc., can solve the problems of restricting the application and promotion of natural asphalt, poor low temperature performance of modified asphalt, etc., and is convenient for large-scale production. , economical safety, simple process effect

Active Publication Date: 2014-01-08
RES INST OF HIGHWAY MINIST OF TRANSPORT
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Problems solved by technology

However, the disadvantage of natural asphalt-modified asphalt is that when the content of natural asphalt is high, the low-temperature performance of the modified asphalt is poor, which greatly limits the application and promotion of natural asphalt
[0004] In order to realize the wide application of natural asphalt, improving the low temperature performance of its modified asphalt has become the top priority. For this reason, certain polymer materials such as styrene-butadiene-styrene block copolymer (SBS) are added to the system , can improve the low-temperature performance of natural asphalt-modified asphalt to a certain extent, but its performance needs to be further improved
[0005] In addition, the performance of SBS modified asphalt can basically meet the requirements of road performance, but for some petroleum asphalt with high asphaltene content, the low temperature performance of SBS modified asphalt still needs to be improved

Method used

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  • Vegetable oil modified asphalt composite and preparation method thereof

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[0029] The invention provides a vegetable oil modified asphalt composition and a preparation method thereof.

[0030] The vegetable oil-modified asphalt composition provided by the present invention contains vegetable oil, petroleum asphalt, and at least one of natural asphalt or polymer materials, and based on the total weight of the vegetable oil-modified asphalt, the content of the vegetable oil is 5-30% by mass, The content of petroleum asphalt is 65-80% by mass, the content of natural asphalt or polymer material or both mixtures is 5-15% by mass, and in the mixture of the two, the mass ratio of natural asphalt and polymer material is 0.5: 1~4.5:1.

[0031] The vegetable oil used in the present invention is not particularly limited, such as tung oil, castor oil, corn oil, soybean oil, rapeseed oil, linseed oil, but not limited thereto. The vegetable oil described in the present invention may also include vegetable oil that has been utilized once or twice, for example, was...

Embodiment 1

[0074] Take 400g of 70# petroleum asphalt, heat it to 140°C, add 66g of rapeseed oil, stir for 5 minutes, add 22g of SBS, stir at 150°C for 10 minutes, the stirring speed is 400r / min, add 38g of rock asphalt after stirring, and stir at 150°C 10min, the stirring rate is 500r / min, the temperature is raised to 180°C, sheared for 30min, the shearing rate is 5000r / min, the sample is stirred at 160°C for 10min, and the stirring rate is 800r / min, thus obtaining the vegetable oil modified Sexual asphalt composition 1.

Embodiment 2

[0076] Take 400g of 70# petroleum asphalt, heat it to 140°C, add 40g of rapeseed oil, stir for 10min, add 24g of SBS, stir for 15min at 150°C, the stirring speed is 500r / min, after the stirring is completed, add 40g of rock asphalt, and stir at 150°C Stir for 10min at a stirring rate of 1000r / min, heat up to 170°C, shear for 30min at a shear rate of 5500r / min, stir the sample at 160°C for 10min at a stirring rate of 600r / min, thus obtaining the vegetable oil of the present invention Modified asphalt composition 2.

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Abstract

The invention provides a vegetable oil modified asphalt composite and a preparation method thereof. The vegetable oil modified asphalt composite comprises the following materials with content based on the total weight of vegetable oil modified asphalt in percentage by weight: 5%-30% of vegetable oil, 65%-80% of petroleum asphalt and 5%-15% at least one of natural asphalt and a high-molecular material or a mixture of the natural asphalt and the high-molecular material, wherein the mass ratio of the natural asphalt and the high-molecular material in the mixture of the natural asphalt and the high-molecular material is (0.5:1)-(4.5:1).

Description

technical field [0001] The invention belongs to the field of road building materials, and relates to a vegetable oil modified asphalt used in road construction. Background technique [0002] Petroleum asphalt is the end product of petroleum refining. Due to the current over-exploitation and use, petroleum resources are decreasing day by day and facing the danger of depletion. Scientists predict that by the middle of this century, around 2050, oil resources will be exhausted. The increasing scarcity of petroleum resources has led to rising prices of petroleum asphalt. [0003] my country is rich in natural asphalt reserves, facing the huge pressure of petroleum asphalt resources, natural asphalt is often used to replace part of petroleum asphalt to form natural asphalt modified asphalt. And natural asphalt contains organic chains that promote the cross-linking and polymerization of active groups (carboxyl, carbonyl, aldehyde, naphthalene, etc.) in petroleum asphalt, so that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L9/06C08L23/06C08L21/00C08K5/103
Inventor 曹东伟吴小维钟成雨张海燕赵立东张艳君
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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