Method for producing compound modified bitumen

A technology of composite modified asphalt and a production method, applied in the production field of composite modified asphalt, can solve the problems of strong adhesion, poor aging resistance and oxidation resistance, low temperature sensing performance, etc., so as to improve the anti-aging and paving performance. Good and stable effect

Active Publication Date: 2008-02-27
JIANGSU BAOLI INT INVESTMENT CO LTD
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Problems solved by technology

[0005] It is generally believed that SBS modified asphalt is the asphalt with better performance of polymer modified asphalt. It has better high temperature performance, low temperature performance and water stability, and has small temperature sensitivity, strong adhesion and strong water peeling resistance. , Anti-rutting, good anti-shrinkage cracking, also has strong anti-slip and noise-absorbing functions, but it has the problem of poor aging resistance and anti-oxidation

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  • Method for producing compound modified bitumen

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Embodiment Construction

[0023] Referring to Fig. 1, the production method of composite modified asphalt of the present invention, it mainly comprises following processing steps:

[0024] Step 1. Add a certain amount of base petroleum asphalt into the stirring reactor, and form a closed circuit system with colloid mill and agitator. When the temperature of base petroleum asphalt is heated to 180°C±5°C, add SBS modifier, furfural Add the extracted oil and furfural extracted oil into the stirring reaction kettle, and add the SBS modifier while shearing, so that the SBS modifier is fully dissolved, and the mixed solution I is obtained.

[0025] Step 2, when the mixed solution I swells and can pass through the 40 mesh, pump the swollen mixed solution I into the finished product development tank.

[0026] Step 3: Keep the finished product development tank at a temperature of 175°C±5°C, add a stabilizer while stirring, and stir for 2 hours±0.5 hours after adding the stabilizer to obtain a mixed solution II....

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Abstract

The invention discloses a preparing method of composite modified pitch, which comprises the following steps: adding base material mineral oil pitch into stirred autoclave; building up closed-circuit system with colloidal mill and stirrer; adding SBS modifier and furfural extract oil into stirred autoclave; getting miscible liquids I; adding into end product growth pot; adding into stabilizator; getting miscible liquids II; sending into heated mixed tank with jacket; adding into natural pitch; stirring; getting the product. This product combines the advantages of SBS modified pitch and natural pitch, which possesses good stability and durability.

Description

technical field [0001] The invention relates to a production method of modified asphalt, in particular to a production method of composite modified asphalt suitable for harsh working conditions. Background technique [0002] With the continuous improvement of traffic and road construction, the performance requirements of asphalt materials are getting higher and higher, especially in some locations with harsh conditions (bridge decks, airports, runways, heavy-duty roads). [0003] Most of the asphalt used in harsh conditions is SBS modified asphalt. SBS modified asphalt is ideal as a road construction material for expressways, but there are some deficiencies in the aging and oxidation resistance of SBS modified asphalt, resulting in the service life of bridge decks and heavy-duty roads paved with SBS modified asphalt generally less than 6 years (the actual design is 10-15 years). [0004] In order to prolong the service life of bridge decks, airport roads, heavy-duty roads ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K5/07C08L53/02
Inventor 汪红兵朱亚琴
Owner JIANGSU BAOLI INT INVESTMENT CO LTD
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