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A kind of high melt index high modulus asphalt mixture additive and its preparation method and application

A kind of asphalt mixture, high modulus technology, applied in the direction of building insulation materials, building components, construction, etc., can solve the problems of unstable source of raw materials, poor product performance stability, high application cost, etc., achieve excellent melt dispersion, improve resistance Rutting performance, effect of improving low-temperature performance

Active Publication Date: 2022-04-12
南京兴佑交通科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many reports on high modulus modifiers. Among them, the French product PR PLASTS and the German product Domix can improve the anti-rutting performance of asphalt pavement, but the price is relatively expensive and the application cost is relatively high.
In China, there are some high modulus agent products with waste PE and PP plastics as the main raw materials. The price is relatively cheap, but the source of raw materials is unstable and the stability of product performance is poor.

Method used

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  • A kind of high melt index high modulus asphalt mixture additive and its preparation method and application
  • A kind of high melt index high modulus asphalt mixture additive and its preparation method and application
  • A kind of high melt index high modulus asphalt mixture additive and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) First weigh 1000g of anti-rutting masterbatch, 100g of Xinjiang rock asphalt, 100g of high-melting index POE VM8380, 100g of high-density polyethylene HDPE, 1g of lubricant oleic acid amide, 2,5-dimethyl-2,5 Put 1 g of di-tert-butyl peroxide hexane into a high-speed mixer to stir the mixture rapidly, and release it after stirring for 5 minutes.

[0032] (2) Add the mixed materials in step (1) into the feeding hopper of the twin-screw extruder for extrusion and granulation. The temperature of the feed port is 80°C, the melting temperature is 200°C, and the die temperature is 140°C , the speed of the host machine is 200r / min, and the cutting speed is 1500r / min. After underwater granulation, the high-melting index and high modulus asphalt mixture additive 1 is obtained.

[0033] Application of high melting point high modulus asphalt mixture additive:

[0034] S1. Heat the base asphalt to 140°C, according to the EME-14 gradation, weigh a certain mass of aggregates in a...

Embodiment 2

[0043] (1) First weigh 1000g of anti-rutting masterbatch, 150g of Xinjiang rock asphalt, 200g of high-melting index POE VM8780, 200g of high-density polyethylene HDPE, 2g of lubricant oleic acid amide, 2,5-dimethyl-2,5 3g of di-tert-butyl peroxide hexane is put into a high-speed mixer to stir the mixed material rapidly, and release after stirring for 5min.

[0044] (2) Add the mixed materials in step (1) into the feeding hopper of the twin-screw extruder for extrusion and granulation. The inlet temperature is 50°C, the melting temperature is 260°C, and the die temperature is 130°C. The rotation speed of the host machine is 300r / min, and the cutting speed is 2000r / min. After underwater granulation, the high-melt index and high modulus asphalt mixture additive 2 is obtained.

[0045] Application of high melting point high modulus asphalt mixture additive:

[0046] S1. Heat the base asphalt to 150°C, according to the EME-14 gradation, weigh a certain mass of aggregates in an exo...

Embodiment 3

[0053] (1) First weigh 1000g of anti-rutting masterbatch, 200g of North American rock asphalt, 150g of high-melting index POE VM8880, 150g of high-density polyethylene HDPE, 2g of lubricant erucamide, 2,5-dimethyl-2,5 Put 2 g of di-tert-butyl peroxide hexane into a high-speed mixer to stir the mixture rapidly, and release it after stirring for 5 minutes.

[0054] (2) Add the mixed materials in step (1) into the feeding hopper of the twin-screw extruder for extrusion and granulation. The inlet temperature is 70°C, the melting temperature is 240°C, and the die temperature is 120°C. The rotation speed of the host machine is 300r / min, and the cutting speed is 2500r / min. After underwater granulation, the high-melt index and high modulus asphalt mixture additive 3 is obtained.

[0055] Application of high melting point high modulus asphalt mixture additive:

[0056] S1. Heat the SBS modified asphalt to 150°C, according to the EME-14 gradation, weigh a certain quality of aggregate a...

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Abstract

The invention discloses a high-melt-index high-modulus asphalt mixture additive, which includes high-molecular polymers, asphalt, lubricants and catalysts, and also includes anti-rutting masterbatches. The high-molecular polymers include high-melt index polyolefins and High-density polyethylene; the asphalt is natural rock asphalt. After each component is mixed by a high-speed mixer, it enters a twin-screw extruder for melt extrusion, and after extrusion, it is pelletized by an underwater pelletizer to obtain a high-melt index high-modulus asphalt mixture additive. The additive of the present invention has a large melting index (140°C, 2.16kg) > 80g / 10min, which can reduce the porosity of the asphalt mixture, so that the prepared asphalt mixture has excellent high and low temperature performance and fatigue resistance, and can improve the service life of the road surface sex.

Description

technical field [0001] The invention relates to a mixture additive, in particular to a high-melting-index high-modulus asphalt mixture additive and its preparation method and application. Background technique [0002] The idea of ​​high modulus asphalt concrete (High Modulus Asphalt Concrete, French abbreviation EME) originated in France. In the application of high modulus asphalt concrete technology, it aims to improve and solve the problems of insufficient rutting resistance of the surface layer and insufficient stiffness of the base layer during the use of asphalt pavement, and has been successfully used in France for more than 30 years. The compactness, durability, anti-rutting ability and anti-fatigue ability of French EME are obviously better than traditional densely graded asphalt mixture. The principle is to increase the modulus of asphalt concrete, reduce the deformation of asphalt concrete under the action of vehicle load, reduce the unrecoverable residual deforma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L23/08C08L23/06C08K5/20C08K5/14C04B26/26
CPCC08L95/00C04B26/26C08L2205/035C08L2205/025C08L2207/066C08L23/0815C08L23/06C08K5/20C08K5/14C04B14/02C04B24/2611C04B16/04C04B2103/0068C04B14/00
Inventor 魏唐中王晓燕李佩宁夏新杰鲁万华
Owner 南京兴佑交通科技有限公司
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