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Solvated SBS rubber powder composite modified asphalt mixture and preparation method thereof

A technology of composite modified asphalt and modified asphalt, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problem of poor water damage resistance and poor performance of modified asphalt pavement Lifting, poor anti-rutting ability and other problems, to achieve the effect of low preparation temperature, remarkable road performance and reduce energy consumption

Pending Publication Date: 2022-04-26
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the deepening of research, rubber-modified asphalt has been widely used: However, in the actual application process, the rubber-modified asphalt pavement has poor water damage resistance and poor rutting resistance, which urgently needs to be improved.
In order to further improve the performance of rubber-modified asphalt mixture, the researchers simply compounded SBS and waste tire rubber powder, and added them to the base asphalt to make waste tire rubber powder / SBS modified asphalt, but ordinary waste tire rubber powder Most tire rubber powder / SBS modified asphalt is improved by adding stabilizers or single additives to improve its miscibility, and the modifier and asphalt cannot be combined to form a stable network structure. The road use of modified asphalt No significant improvement in performance

Method used

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  • Solvated SBS rubber powder composite modified asphalt mixture and preparation method thereof

Examples

Experimental program
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Effect test

preparation example

[0024] The modified asphalt is made of raw materials including the following parts by weight: 83 parts of base asphalt and 17 parts of composite modifier, wherein the composite modifier is made of raw materials including the following parts by weight: 15 parts of rubber powder, 5 parts of SBS, 100 parts of toluene share.

[0025] Modified bitumen is made by the following methods:

[0026] (1) Mix 5 parts of SBS and 100 parts of toluene solution at room temperature, add 15 parts of rubber powder after mixing thoroughly, stir and develop at room temperature for 4 hours, and then recover the liquefaction solvent through a vacuum distillation device to obtain solvated SBS rubber powder Composite modifier.

[0027] (2) Take 83 parts by mass of base asphalt and heat it to 140-160°C, add the solvated SBS rubber powder composite modifier to the hot base asphalt, stir and heat up to 170-180°C, and develop for two hours to obtain the solvent Chemical SBS rubber powder compound modifie...

Embodiment 1

[0030] A composite modified asphalt mixture containing solvated SBS rubber powder, made of the following components by weight: 4.8 parts of modified asphalt in the preparation example, 98 parts of aggregate, 2 parts of mineral powder, and 0.2 part of fiber.

[0031] The preparation method of solvated SBS rubber powder composite modified asphalt mixture comprises the following steps:

[0032] S1. Weigh the aggregate and mineral powder according to the above ratio, put them into an oven and heat them to 220°C; preheat the modified asphalt to 170°C.

[0033] S2. Add the preheated aggregates and solvated SBS rubber powder composite modified asphalt into the mixing pot at 180°C in sequence, stop stirring after stirring for 90s, add mineral powder and fiber and continue stirring for 90s to obtain the solvated SBS rubber powder composite modified asphalt. permanent asphalt mixture.

Embodiment 2

[0035] A composite modified asphalt mixture containing solvated SBS rubber powder, made of the following components by weight: 5.3 parts of modified asphalt in the preparation example, 92 parts of aggregate, 4 parts of mineral powder, and 0.5 part of fiber.

[0036] The preparation method of solvated SBS rubber powder composite modified asphalt mixture comprises the following steps:

[0037] S1. Weigh the aggregate and mineral powder according to the above ratio, put them into an oven and heat them to 210°C; preheat the modified asphalt to 170°C.

[0038] S2. Add the preheated aggregates and solvated SBS rubber powder composite modified asphalt into the mixing pot at 185°C in sequence, stop stirring after stirring for 90s, add mineral powder and fiber and continue stirring for 90s to obtain the solvated SBS rubber powder composite modified asphalt. permanent asphalt mixture.

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Abstract

The invention discloses a solvated SBS rubber powder composite modified asphalt mixture and a preparation method thereof. The solvated SBS rubber powder modified asphalt mixture is prepared from the following components in parts by weight: 93 to 98 parts of aggregate, 4.5 to 6 parts of modified asphalt, 2 to 5 parts of mineral powder and 0.2 to 0.6 part of fiber. The solvated SBS rubber powder is adopted to replace an expensive SBS modifier, so that the prepared composite modified asphalt mixture is good in performance and low in cost, the rubber powder formed by grinding the waste tires is added, economic benefits and environmental benefits are good, meanwhile, the solvated SBS rubber powder composite modified asphalt mixture has good high-temperature stability, and the service life of the composite modified asphalt mixture is prolonged. The low-temperature anti-cracking performance and the durability are realized.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt, and more specifically relates to a modified asphalt mixture and a preparation method thereof. Background technique [0002] The development of road traffic directly affects the lifeline of the national economy and social development, because the expressway is mainly paved with asphalt mixture. With the continuous development of expressways, the use of asphalt mixture is also increasing, but the asphalt pavement is affected by factors such as climate conditions, traffic conditions, and raw material quality, which will damage the asphalt pavement and improve the road performance of the asphalt pavement. It has become an important problem to be faced at present. With the development of the automobile industry, waste tire rubber has caused serious solid waste pollution. With the deepening of research, rubber-modified asphalt has been widely used; however, in the actual application process,...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B18/22C04B24/26C04B111/20C04B111/34
CPCC04B26/26C04B18/22C04B24/2688C04B2201/50C04B2111/0075C04B2111/20C04B2111/343C04B2111/00017C04B24/00C04B14/02C04B20/0048Y02W30/91
Inventor 涂恒源廖国胜王朝吴振杨威
Owner WUHAN UNIV OF SCI & TECH