SBS modified asphalt and preparation method thereof

A technology of modified asphalt and asphalt, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of softening point and aging effect that cannot meet the requirements, high production cost, etc., and achieve long-term storage and use , fast response, good anti-aging performance

Inactive Publication Date: 2011-09-14
河南现代交通道路科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the softening point and aging effect of the existing SBS modified asphalt can not meet the requirements, and the production cost of the existing SBS modified asphalt is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: 500g of asphalt, 17.5g of star-shaped SBS, 25g of extension agent and 0.25g of stabilizer.

[0020] Preparation method: (1) To prepare the extension agent, mix rubber softening oil with diallyl phthalate, and then stir at 120°C for 1.5 hours;

[0021] (2) To prepare a stabilizer, mix the accelerator tetrabutylthiuram sulfide with antioxidant 1076, and then stir at 65°C for 1 hour;

[0022] (3) To prepare SBS modified asphalt, heat 500g of asphalt to 165°C, add 17.5g of star-shaped SBS and 25g of the extension agent prepared in step (1) after the asphalt is dissolved, and pass through the colloid mill after the star-shaped SBS and extension agent are dissolved Grind, then stir for 2 hours, then add 0.25 g of the stabilizer prepared in step (2), and continue stirring for 4 hours.

Embodiment 2

[0023] Example 2: 500g of asphalt, 25g of star-shaped SBS, 5g of extension agent and 1g of stabilizer.

[0024] Preparation method: (1) To prepare the extension agent, mix rubber softening oil with diallyl phthalate, and then stir at 130°C for 1 hour;

[0025] (2) To prepare a stabilizer, mix the accelerator tetrabutylthiuram sulfide with antioxidant 1076, then stir at 70°C for 0.8 hours;

[0026] (3) To prepare SBS modified asphalt, heat 500g of asphalt to 175°C, add 25g of star-shaped SBS and 5g of the extension agent prepared in step (1) after the asphalt is dissolved, and then undergo high-speed shearing after the star-shaped SBS and extension agent are dissolved Machine mixed at 3000 rpm for 30 minutes, then stirred for 2.5 hours, then added 1 g of the stabilizer prepared in step (2), and continued to stir for 3 hours.

Embodiment 3

[0027] Example 3: 500g of asphalt, 12.5g of star-shaped SBS, 15g of extension agent and 0.45g of stabilizer.

[0028] Preparation method: (1) To prepare the extension agent, mix rubber softening oil with diallyl phthalate, and then stir at 140°C for 0.5 hours;

[0029] (2) To prepare a stabilizer, mix the accelerator tetrabutylthiuram sulfide with antioxidant 1076, then stir at 75°C for 0.5 hours;

[0030] (3) To prepare SBS modified asphalt, heat 500g of asphalt to 180°C, add 12.5g of star-shaped SBS and 15g of the extension agent prepared in step (1) after the asphalt is dissolved, and pass through the colloid mill after the star-shaped SBS and extension agent are dissolved Grind, then stir for 3 hours, then add 0.45 g of the stabilizer prepared in step (2), and continue stirring for 2 hours.

[0031] Comparative experiment 1: Add 500 grams of asphalt into a stainless steel cup, heat it to 175°C, add 17.5 grams of star-shaped SBS into the cup, stir it with a strong mixer fo...

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Abstract

The invention provides an SBS modified asphalt, which is prepared from asphalt, a starlike SBS, a ductility improver and a stabilizing agent, wherein the usage of the starlike SBS is 2.5 to 5 percent of that of the asphalt; the dosage of the ductility improver is 1.0 to 5.0 percent of that of the asphalt; the dosage of the stabilizing agent is 0.5 to 2.0 percent of that of the asphalt; the ductility improver is prepared by stirring rubber softening oil and diethyl phthalate for 0.5 to 1.5 hours at the temperature of between 120 and 140 DEG C; and the stabilizing agent is prepared by stirring an accelerant, namely tetramethyl thiuram monosulfide, and an antioxidant for 0.5 to 1 hour at the temperature of between 65 and 75 DEG C. The asphalt product prepared by the invention has the characteristics of high softening point, great ductility, wide temperature range of application and large elastic restitution, can improve the high temperature anti-deforming capability and the low temperature anti-cracking and fatigue resisting capabilities of a road surface remarkably, and simultaneously improves the temperature stability, the water stability and the durability of the road surface effectively.

Description

technical field [0001] The invention belongs to the technical field of asphalt, relates to a kind of SBS modified asphalt, and also relates to a preparation method of the asphalt. Background technique [0002] Modification of asphalt is the requirement of asphalt pavement for the development of modern road traffic. Modern roads, especially high-grade roads, are characterized by large traffic volume, heavy load and fast speed, which put forward higher and higher quality requirements for asphalt. Ordinary asphalt is difficult to meet the requirements, so it is necessary to modify the asphalt. Modified asphalt is mainly composed of modifiers and base asphalt. Commonly used modifiers include styrene-butadiene-styrene thermoplastic elastomer (SBS), styrene-butadiene rubber (SBR), polyethylene (PE) and other types Modifier. Since styrene-butadiene-styrene thermoplastic elastomer (SBS) has the characteristics of both rubber and resin modifiers, it can improve the high and low tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B18/22C04B24/04
CPCY02W30/91
Inventor 尹建军闫勇姚斌关京刘伟任晓东郭海云陈峰齐明付立军苗保民陈扬
Owner 河南现代交通道路科技有限责任公司
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