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System and method for preparing rubber-modified asphalt

A rubber modification and production system technology, applied in building components, building insulation materials, construction, etc., can solve the problems of high temperature of base asphalt, long mixing time, low production efficiency, etc.

Inactive Publication Date: 2012-06-27
陕西长大博源公路养护科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: (1) The heating speed of the base asphalt using the heat conduction oil pipe alone is slow, and the heat utilization rate is not high; (2) The mixed swelling tank alone needs to be stirred for a long time, the production efficiency is low, and the production cycle is long; (3) The one-way production process makes it difficult to control the quality, and the quality of each batch varies greatly, making it difficult to guarantee the quality requirements of road construction
In particular, the production of rubber-modified asphalt requires a high temperature of the base asphalt (190°C to 200°C), longer heating and stirring time for the mixing and swelling tank, lower production efficiency, and the base asphalt is prone to aging

Method used

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  • System and method for preparing rubber-modified asphalt
  • System and method for preparing rubber-modified asphalt
  • System and method for preparing rubber-modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Heat the base asphalt in the base asphalt tank from normal temperature to 130°C to make it flow, then pump it into the primary heating tank, raise the temperature (primary heating) to 165°C in 30 minutes, and then pump it into the secondary heating tank, 15 minutes (secondary temperature rise) to 200 ° C, and finally pumped into the mixing swelling tank;

[0040] (2) Put the inner tire rubber powder with a fineness of 30 mesh to 60 mesh into the mixing and swelling tank, wherein the rubber powder input amount is 25% of the pumped amount of matrix asphalt;

[0041] (3) In the mixing and swelling tank, mix the matrix asphalt and rubber powder at 200°C for 5 minutes, then pass through the rubber mill and then pass it into the development storage tank. After mixing for 1 hour at 200°C, the modified rubber is obtained. asphalt.

Embodiment 2

[0043] (1) Heat the base asphalt in the base asphalt tank from normal temperature to 110°C, then pump it into the primary heating tank, raise the temperature (primary heating) to 135°C in 20 minutes, then pump it into the secondary heating tank, 15 minutes (secondary heating) ) to 170°C, and finally pumped into the mixing swelling tank;

[0044] (2) Putting the outer tire rubber powder with a fineness of 30 mesh to 60 mesh into the mixing and swelling tank, wherein the rubber powder input amount is 25% of the base asphalt amount;

[0045] (3) In the mixing and swelling tank, mix the matrix asphalt and rubber powder at 170°C for 10 minutes, then pass through the rubber mill and then pass it into the development storage tank. After 3 hours of stirring and mixing at 170°C, the modified rubber is obtained. asphalt.

Embodiment 3

[0047](1) Heat the base asphalt in the base asphalt tank from normal temperature to 120°C, then pump it into the primary heating tank, raise the temperature to 150°C in 25 minutes (primary heating), then pump it into the secondary heating tank, 13 minutes (secondary heating) ) to 185°C, and finally pumped into the mixing swelling tank;

[0048] (2) Putting the outer tire rubber powder with a fineness of 30 mesh to 60 mesh and the inner tire rubber powder in a mass ratio of 1:1 into the mixing and swelling tank, wherein the rubber powder input amount is 20% of the pumped amount of matrix asphalt;

[0049] (3) In the mixing and swelling tank, mix the base asphalt and rubber powder at 185°C for 7 minutes, then pass through the rubber mill and then pass it into the development storage tank, and mix it at 185°C for 2 hours to obtain the modified rubber asphalt.

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Abstract

The invention discloses a system and a method for preparing rubber-modified asphalt. The system comprises a substrate asphalt tank, a first asphalt pump, a primary heating tank, a second asphalt pump, a secondary heating tank, a mixing and swelling tank, a third asphalt pump, a rubber grinder, a development and storage tank, a fourth asphalt pump and a first discharge control valve which are communicated with one another sequentially by a pipeline, wherein the swelling tank is communicated with a feeder by the pipeline. The preparation method comprises the following steps of: (1) heating substrate asphalt to 110 to 130 DEG C, and rising temperature twice to 170 to 200 DEG C in a way that the temperature rising speed of the second time is more than the temperature rising speed of the firsttime; (2) feeding rubber powder in an amount which is 15 to 25 percent of that of the substrate asphalt by using the feeder; and (3) in the mixing and swelling tank, preserving the heat at 170 to 200DEG C, performing mixing under stirring for 5 to 10 minutes, introducing the mixture into the development and storage tank by using the rubber grinder, preserving the heat at 170 to 200 DEG C, and performing mixing under stirring for 1 to 3 hours to obtain the rubber-modified asphalt.

Description

technical field [0001] The invention relates to the production field of highway pavement modified asphalt, in particular to a production system and preparation method of rubber modified asphalt. Background technique [0002] With the rapid development of the economy and the increasing traffic volume, the performance requirements of the road are getting higher and higher, saving resources and protecting the environment, reducing the traffic noise of road driving, prolonging the service life of the road surface, improving the anti-rutting ability of the road surface, reducing Response to cracking, increase the skid resistance of rainy pavement, reduce maintenance costs, improve driving comfort, and reduce the thickness of pavement pavement. These performance requirements provide a direction for research on the modification of asphalt materials. Rubber-modified asphalt has high-temperature stability, low-temperature flexibility, aging resistance, fatigue resistance, and water d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00E01C19/02E01C19/08E01C19/10
Inventor 徐培华陈际江商博明王安玲蔡乾东贾晓放
Owner 陕西长大博源公路养护科技有限公司
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