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Coal asphalt/SBS (Styrene Butadiene Styrene)/waste colloid powder composite modified asphalt and preparation method thereof

A technology of composite modified asphalt and coal tar pitch, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve problems such as difficulty in adapting to high-grade roads, incomplete swelling and dissolution, and high temperature sensitivity, so as to reduce the asphalt ratio and Road construction cost, reduction of reflective cracks on the road surface, and the effect of large micellar particles

Active Publication Date: 2013-04-17
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two main methods have some problems in practical engineering applications: the cost of SBS modification method is high; when SBS / waste rubber powder composite modification is used, the waste rubber powder will not swell and dissolve completely in the matrix asphalt , system viscosity is high and construction is difficult
However, the matrix asphalt used for high-grade highways in my country has high wax content, and has performance shortcomings such as high temperature sensitivity, poor adhesion and low elongation, and it is difficult to meet the requirements of high-grade highways.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A coal tar pitch / SBS / waste rubber powder composite modified asphalt and a preparation method thereof. Its preparation method is:

[0031] Step 1. Put 73-80wt% petroleum pitch and 4-7wt% medium-temperature coal tar pitch into the reaction tank, heat up to 160-180°C by means of peripheral heating, and then under the same temperature and 150-300r / min conditions, Add 3~4wt% linear block copolymer, and then cut with a colloid mill for 0.4~0.6h.

[0032] Step 2. Add 10-16wt% waste rubber powder to the product obtained in Step 1 under the temperature conditions of Step 1, and then turn on the electric heating device at the bottom of the reaction tank. When the bottom temperature rises to 180-200°C, Stir at 150~300r / min for 0.4~0.6h, and then use the colloid mill to cut for 0.4~0.6h to refine the product after the second shearing.

[0033] Step 3. This step is carried out at 170~180°C and 150~300r / min. The product obtained in Step 2 is pumped to the development tank, swelled ...

Embodiment 2

[0035] A coal tar pitch / SBS / waste rubber powder composite modified asphalt and a preparation method thereof. Its preparation method is:

[0036] Step 1. Put 73-80wt% petroleum pitch and 4-7wt% medium-temperature coal tar pitch into the reaction tank, heat up to 160-180°C by means of peripheral heating, and then under the same temperature and 150-300r / min conditions, Add 1~2wt% star-shaped block copolymer, and then cut with colloid mill for 0.4~0.6h.

[0037] All the other are with embodiment 1.

Embodiment 3

[0039] A coal tar pitch / SBS / waste rubber powder composite modified asphalt and a preparation method thereof. Its preparation method is:

[0040] Step 1. Put 73-80wt% petroleum pitch and 4-7wt% low-temperature coal tar pitch into the reaction tank, heat up to 160-180°C by means of peripheral heating, and then under the same temperature and 150-300r / min conditions, Add 3~4wt% linear block copolymer, and then cut with a colloid mill for 0.4~0.6h.

[0041] All the other are with embodiment 1.

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PUM

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Abstract

The invention relates to a coal asphalt / SBS (Styrene Butadiene Styrene) / waste colloid powder composite modified asphalt and a preparation method thereof. The technical scheme of the invention is that: the preparation method comprises the following steps of: firstly, putting 58-80wt% of petroleum asphalt and 4-20wt% of coal asphalt in a reaction tank, subsequently heating to 160-180 DEG C, adding 1-4wt% of SBS and using a colloid mill to cut for 0.4-0.6 hour; adding 10-36wt% of waste colloid powder into a product after cutting, stirring for 0.4-0.6 hour under a condition at a bottom temperature of 180-200 DEG C and a speed of 150-300r / min (revolutions per minute), then using the colloid mill to cut for 0.4-0.6 hour again; and feeding the product after cutting for the second time into a development tank, swelling for 1-3 hours under a condition at a temperature of 170-180 DEG C and a speed of 150-300r / min, adding 0.5-1.0wt% of high-boron calcium borate and 0.2-0.3wt% of stabilizing agent, developing for 1-2 hours and preparing the coal asphalt / SBS / waste colloid powder composite modified asphalt. The coal asphalt / SBS / waste colloid powder composite modified asphalt prepared by the invention has the characteristics of low cost, no fracture at a low temperature, no softening at a high temperature, good elasticity, strong adhesive force, long service life and stable storage.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt. Specifically relates to a coal tar pitch / SBS / waste rubber powder composite modified asphalt and a preparation method thereof. Background technique [0002] Composite modified asphalt refers to doping two or more modifiers into base asphalt to improve [0003] Improve the performance of asphalt. At present, polymer modification and SBS / waste rubber powder compound modification are mostly used for modified asphalt, which has a good modification effect. However, the above two main methods have some problems in practical engineering applications: the cost of SBS modification method is high; when SBS / waste rubber powder composite modification is used, the waste rubber powder will not swell and dissolve completely in the matrix asphalt , The viscosity of the system is high and the construction is difficult. And the above two main methods are prone to problems such as segregation during sto...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L21/00C08L97/00C08K3/38C08K3/06C08K5/20C04B26/26
Inventor 李其祥范春华邹进忠陈亮孙昱
Owner WUHAN UNIV OF SCI & TECH
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