Composite modified bitumen and preparation method thereof

A technology for compounding modified asphalt and asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of not taking into account the change of asphalt properties and asphalt properties, and achieve the improvement of high temperature and easy flow, good temperature sensitivity, and simple operation. Effect

CN101608069AActive Publication Date: 2009-12-23CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-12-23

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Abstract

The invention relates to composite modified bitumen and a preparation method thereof. The preparation method comprises the following steps: mixing 50 to 89.9 weight percent of bitumen, 10 to 49.9 weight percent of hard bitumen and 0.1 to 5 weight percent of polymer according to the proportion; and then shearing and stirring for 0.1 to 3 hours at a temperature between 80 and 240 DEG C so as to obtain the composite modified bitumen. The composite modified bitumen has the advantages of outstanding high-temperature and low-temperature performances, good temperature sensibility, wide use temperature range and PG grade reaching or exceeding PG 76-28; therefore, the bitumen can be widely used for road surface paving of roads, bridges, airfield runway, and the like.
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Description

technical field

[0001] The invention belongs to an asphalt material composition and a preparation method thereof, more specifically a composite modified asphalt and a preparation method thereof. Background technique

[0002] Asphalt, as a pavement material for roads, construction and water conservancy industries, develops very rapidly, but ordinary asphalt is highly sensitive to temperature, and there are problems of high temperature flow in summer and low temperature cracking in winter. Therefore, the application of modified asphalt is more and more popular. people's attention.

[0003] In recent years, the advantages of polymer modified asphalt as a road construction material have gradually been recognized by people, so its application is also increasing year by year. There are many types of polymers used for modification, which can be generally divided into three categories according to different modifiers:

[0004] 1. Thermoplastic rubber. That is, thermoplastic elast...

Examples

Embodiment Construction

[0037] The following examples will further illustrate the present invention, but do not limit the present invention thereby.

[0038] According to the method and steps described in this patent, 6 composite modified asphalt samples were prepared respectively. See Examples 1-6 for the specific formula and SHRP evaluation results; see Comparative Examples 1 and 2 for the evaluation results of matrix asphalt processed by the same method and steps. ; Refer to Comparative Examples 3 and 4 for the evaluation results of modified asphalt prepared with thermoplastic elastomer SBS as a modifier.

[0039] It can be seen from the above specific examples and SHRP evaluation results that the comprehensive performance of the composite modified asphalt prepared by the present invention is significantly better than that of the base asphalt, and also better than that of the SBS modified asphalt. Therefore, the composite modified asphalt prepared by the present invention can completely or partial...