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Durable rubber asphalt and preparation method thereof

A rubber asphalt, durable technology, applied in the composition and preparation of rubber powder modified asphalt, can solve the problems of poor low temperature crack resistance and shortened service life of modified asphalt, achieve excellent low temperature crack resistance, reduce product Cost, Pollution Reduction Effect

Inactive Publication Date: 2010-10-27
上海道柯特沥青科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technologies have solved the problem of high temperature storage stability of rubber powder modified asphalt to a certain extent, the low temperature crack resistance of these modified asphalt is not good
Especially in the cold northern regions, low-temperature shrinkage cracking of asphalt mixture is one of the main causes of cracks in asphalt pavement. Due to the infiltration of rainwater, the overall strength of the cracked pavement will decrease sharply, resulting in a sharp shortening of the service life.

Method used

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  • Durable rubber asphalt and preparation method thereof
  • Durable rubber asphalt and preparation method thereof
  • Durable rubber asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Taking the production of about 10 tons of rubber powder modified asphalt products of the present invention as an example, the asphalt in the formula is No. 90 heavy traffic road petroleum asphalt produced by Liaohe Petrochemical, with a penetration of 90; the rubber powder is 30 mesh.

[0027] Components and weight percentages contained in the formula are:

[0028] Asphalt 8t

[0029] Rubber powder 2t

[0030] Take Liaohe No. 90 petroleum asphalt, heat it to 180°C in the reaction kettle, then slowly add 30 mesh waste tire rubber powder, stir at low speed (300-1000 rpm) for 20 minutes, raise the temperature to 190°C, and then use high-speed shear The cutting machine shears and grinds once to obtain the product of the present invention.

Embodiment 2

[0032] Taking the production of about 10 tons of rubber powder modified asphalt products of the present invention as an example, the asphalt in the formula is No. 90 heavy traffic road petroleum asphalt produced by Liaohe Petrochemical, and the penetration is 90; the rubber powder is 30 mesh; 420 heat setting motor oil produced by Tunghsu Chemical Factory.

[0033] Components and weight percentages contained in the formula are:

[0034] Asphalt 8t

[0035] Rubber powder 2t

[0036] Activator 4kg

[0037] Take Liaohe No. 90 petroleum asphalt, heat it to 180°C in the reaction kettle, then slowly add 30 mesh waste tire rubber powder in sequence, stir the activator at a low speed (300-1500 rpm) for 20 minutes, raise the temperature to 190°C, and then Cut and grind once with a high-speed shearing machine to obtain the product of the present invention.

Embodiment 3

[0039] Taking the production of about 10 tons of rubber powder modified asphalt products of the present invention as an example, the asphalt in the formula is No. 90 heavy traffic road petroleum asphalt produced by Liaohe Petrochemical, with a penetration of 90; rubber powder is 30 mesh; the activator is the same as in Example 2.

[0040] Components and weight percentages contained in the formula are:

[0041] Asphalt 8t

[0042] Rubber powder 2t

[0043] Activator 4kg

[0044] DTDM 6kg

[0045]Take Liaohe No. 90 petroleum asphalt and heat it to 180°C in the reaction kettle, then slowly add 20 mesh waste tire rubber powder and activator, stir at low speed (300-1500 rpm) for 15 minutes, raise the temperature to 190°C, and then use high-speed The shearing machine is ground once, then the anti-reversion agent is added, and the product is pumped into the storage tank to obtain the product of the present invention.

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Abstract

The invention provides durable rubber asphalt, which is characterized by: comprising the raw materials of asphalt and rubber powder, wherein the amount of the asphalt is 75 to 85 percent based on the total weight of the asphalt and the rubber powder and the amount of the rubber powder is 15 to 25 percent based on the total weight of the asphalt and the rubber powder; and also comprising an activator and an anti-reversion agent, wherein the amount of the activator is 0.1 to 1 percent based on the weight of the rubber powder, and the amount of the anti-reversion agent is 0.1 to 0.5 percent based on the weight of the rubber powder. The durable rubber asphalt provided by the invention solves the instability problem of rubber powder modified asphalt stored at high temperature by using the synergistic effect of the anti-reversion agent and the activator, and has the characteristic of resisting softening point attenuation during high-temperature storage. When used in a mixed asphalt material, the durable rubber asphalt has the characteristics of low oil amount and high low-temperature anticracking performance. The durable rubber asphalt can be used in road construction and maintenance materials for making bridge surface waterproof layers, stress absorbing layers, asphalt synchronous chip sealing layers and the like.

Description

technical field [0001] The invention relates to a road construction material, in particular to a composition of rubber powder modified asphalt resistant to high temperature storage and its preparation method and application. Background technique [0002] As a continuous pavement, asphalt pavement has the characteristics of comfortable driving and easy maintenance, and has become the main form of pavement. However, asphalt pavement has insufficient high temperature stability, low temperature crack resistance, and water damage resistance, which easily cause rutting, cracks, and potholes. In order to reduce the premature appearance of diseases, modified asphalt materials are mostly used now. At present, SBS modified asphalt is widely used as the modified asphalt material, but this kind of asphalt modifier has the problem of high price, and the modification process is relatively complicated. The addition of waste rubber powder can make the asphalt achieve the effect of modific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08K5/43
Inventor 李小军
Owner 上海道柯特沥青科技有限公司
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