Composite modified asphalt for high-grade high road and preparation thereof

A composite modified asphalt, high-grade technology, applied in the field of petroleum asphalt, can solve the problems of short service life, short service life and frequent maintenance of pavement, and achieve easy implementation, long service life, low temperature crack resistance and heavy load bearing The effect of good ability

Inactive Publication Date: 2009-08-19
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the road asphalt produced in China has the disadvantages of being brittle at low temperature, easy to soften at high temperature, poor elasticity and sho

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A composite modified asphalt for high-grade highways and a preparation method thereof. First, 10-18wt% of prepared coal pitch and 82-90wt% of petroleum pitch are mixed uniformly by a colloid mill, the temperature is raised to 120-200°C, and then 5-10wt% of the above mixture is added with styrene-butadiene-styrene The block copolymer and 0.1-0.2 wt % of the stabilizer are mixed for 0.5-1.5 hours under the above-mentioned temperature conditions; then stirred and kept in a development tank for 4-8 hours, and placed in a storage tank.

[0020] The preparation of coal tar pitch in this embodiment is as follows: adding 40-45wt% medium-temperature coal tar pitch and 55-60wt% coal tar into the reactor, and mixing at 130-160°C for 0.5-1.5 hours to prepare prepared coal asphalt.

Embodiment 2

[0022] A composite modified asphalt for high-grade highways and a preparation method thereof. The preparation of coal tar pitch in this embodiment is: adding 5-65wt% of medium-temperature coal tar pitch and 35-45wt% of coal tar fraction into a reactor, and mixing at 100-130°C for 1.5-3.0 hours to prepare a preparation coal tar. The rest are the same as in Example 1.

Embodiment 3

[0024] A composite modified asphalt for high-grade highways and a preparation method thereof. The preparation of coal tar pitch in this embodiment is as follows: adding 5-90wt% medium-temperature coal pitch and 10-15wt% phenolic resin into the reactor, and mixing at 130-160°C for 0.5-1.5 hours to prepare prepared coal pitch . The rest are the same as in Example 1.

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PUM

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Abstract

The invention relates to composite modified pitch used for high-grade highways and a preparation method thereof. The technical proposal is as follows: firstly, 10-45 weight percent of concocted coal pitch and 55-90 weight percent of petroleum pitch are mixed uniformly by a colloid mill to be heated up to 120-220 DEG C; 1-10 weight percent of the above mixed material of styrene-butadiene-styrene block copolymer and 0.1-0.3 weight percent of stabilizing agent are added to be mixed for 0.5 to 2 hours at the temperature as above; and then the materials are stirred and kept warm in a development tank for 2 to 8 hours and then are placed in a storage tank. The concocted coal pitch is prepared by the step as follows: 40-70 weight percent of mesothermal coal pitch and 30-60 weight percent of coal tar or coal tar distillation cut or 85-95 weight percent of the mesothermal coal pitch and 5-15 weight percent of phenolic resin are added into a reactor to be mixed for 0.5 to 3 hours at 100-160 DEG C. the invention has low cost and simple technology, and a product has the characteristics of unlikely crack at low temperature, uneasy softening at high temperature, good elasticity, high strength and long service life.

Description

1. Technical field [0001] The invention belongs to the technical field of petroleum asphalt. Specifically, it relates to a composite modified asphalt for high-grade highways and a preparation method thereof. 2. Background technology [0002] With the rapid development of transportation, convenient and fast road transportation is taking on more and more transportation volume, which directly leads to a substantial increase in the load of vehicles on the road, the increase in vehicle speed, and the increase in driving frequency. requirements, especially the need for a large number of high-grade road surfaces. The construction of high-grade highway pavement needs to pay more attention to the rutting resistance, shear deformation resistance and durability of the pavement material. [0003] At present, the domestic research on modified asphalt mainly uses petroleum asphalt as the base material to add polymer to modify it to make modified petroleum asphalt. It is difficult to me...

Claims

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Application Information

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IPC IPC(8): C08J3/20C08L95/00C08L53/02
Inventor 李其祥柏红学王世杰
Owner WUHAN UNIV OF SCI & TECH
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