Directly-mixed rubber asphalt mixture and production method thereof

A technology for rubberized asphalt and mixture, which is applied in the field of rubberized asphalt mixture and production of rubberized asphalt mixture, can solve the problems of poor performance, affecting the thermal storage of the mixture, and low quality.

Active Publication Date: 2010-08-11
四川盖瑞新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the short preparation time of the dry rubber asphalt mixture, which is only about 1 minute, the rubber particles in the dry rubber asphalt mixture cannot complete the process of desulfurization and degradation, and cannot perform material exchange with asphalt to modify the asphalt , can only be used as an aggregate, and has no obvious effect on improving the performance of asphalt pavement
Therefore, the performance of the existing dry-process rubber asphalt mixture is poorer than that of wet-process asphalt, especially the water stability is poor. During the production process, additives such as cement and salt lime are often added to improve water stability.
Due...

Method used

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  • Directly-mixed rubber asphalt mixture and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The direct mix rubber asphalt mixture listed in this example is an AC10 graded urban white plus black mixture, which is configured according to the following weight ratio components: stone material: petroleum base asphalt: rubber powder modifier = 89:6:5 , the rubber powder modifier is composed of components in the following weight ratio: waste tire rubber powder: hexanediol = 100:3.

[0017] The direct mixing rubber asphalt mixture of the present embodiment is prepared according to the following method:

[0018] (1) Preparation of rubber powder modifier: Mix hexanediol into rubber powder in the weight ratio of rubber powder: hexanediol=100:3, mix and wet to obtain rubber powder modifier, and modify the rubber powder The agent is loaded into the powder bin of the mixing building for standby;

[0019] (2) Preparation of rubber asphalt mixture: heat the graded stone to 210-220°C in the mixing bin, and heat the petroleum-based asphalt to 160-170°C, according to the extrem...

Embodiment 2

[0021] The direct-mix rubber asphalt mixture listed in this example is AC13 primary road surface mixture, which is configured according to the following weight ratio components: stone material: petroleum base asphalt: rubber powder modifier = 92:5:3, so The rubber powder modifier is composed of components in the following weight ratio: waste tire rubber powder: hexanediol = 100:5.

[0022] The direct mixing rubber asphalt mixture of the present embodiment is prepared according to the following method:

[0023] (1) Preparation of rubber powder modifier: mix hexanediol into rubber powder in the weight ratio of rubber powder: hexanediol=100:5, mix and wet to obtain rubber powder modifier, and modify the rubber powder The agent is loaded into the powder bin of the mixing building for standby;

[0024] (2) Preparation of rubber asphalt mixture: heat the graded stone to 210-220°C in the mixing bin, and heat the petroleum-based asphalt to 160-170°C, according to the extreme mix of s...

Embodiment 3

[0026] The direct-mix rubber asphalt mixture listed in this example is AC16 intermediate layer mixture, which is configured according to the following weight ratio: stone material: petroleum base asphalt: rubber powder modifier = 94:4:2, the rubber The powder modifier is composed of components in the following weight ratio: waste tire rubber powder: hexanediol=100:7.

[0027] The direct mixing rubber asphalt mixture of the present embodiment is prepared according to the following method:

[0028] (1) Preparation of rubber powder modifier: Mix hexanediol into rubber powder according to the weight ratio of rubber powder: hexanediol=100:7, mix and wet to obtain rubber powder modifier, and modify the rubber powder The agent is loaded into the powder bin of the mixing building for standby;

[0029] (2) Preparation of rubber asphalt mixture: heat the graded stone to 210-220°C in the mixing bin, and heat the petroleum-based asphalt to 160-170°C, according to the extreme mix of stone...

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Abstract

The invention relates to a rubber asphalt mixture and a preparation method thereof. The mixture is prepared with the following components in proportion by weight: gradation stone: petroleum matrix asphalt: rubber powder modifier= 89 to 94: 4 to 6: 2 to 5, and the rubber powder modifier comprises the following component in proportion by weight: rubber power: hexanediol= 100: 3 to 7. The preparation method of the mixture comprises the following steps that: the hexanediol is doped in waste tire powder according to the proportion to be mixed and moistened to obtain the rubber powder modifier; mineral aggregates are heated to the temperature of 210 to 220 DEG C, and then rubber powder modifier and petroleum matrix asphalt are added into the mineral aggregates at the same time to be mixed for 40 to 60 seconds to obtain the mixture. The method is free from pre-mixing the rubber powder and the stone, is simple, and can realize the transformation from rubber to oil, and the petroleum-stone ratio of the mixture can be reduced to 6 to 8. All technical indexes of the directly-mixed rubber asphalt mixture are higher than the industrial standard, and the directly-mixed rubber asphalt mixture can be used for the road construction and water prevention and leakage prevention of roof and tunnels.

Description

technical field [0001] The invention relates to a method for producing rubber asphalt mixture and the produced rubber asphalt mixture. Background technique [0002] Rubber asphalt is a product obtained by mixing rubber powder and asphalt in a certain proportion. It is a binder used in the construction of various types of flexible road surfaces. The mixture obtained by mixing rubber asphalt and mineral aggregates is called rubber asphalt mixture, and when it is paved and rolled, it is also called rubber asphalt concrete. At present, rubber asphalt pavement technology has formed a relatively complete wet process and dry process. The dry process is a production method in which rubber powder is added to mineral aggregates, put into the mixing building, and hot asphalt is added to mix to produce rubber asphalt mixture. The wet process is a production method in which rubber powder and asphalt are first mixed to form rubber asphalt and then mixed with mineral materials to produce...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/24
CPCC04B2111/0075C04B26/26Y02W30/91C04B14/06C04B18/22C04B24/02
Inventor 周其强
Owner 四川盖瑞新材料科技有限公司
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