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Diatomite compound SBS (Styrene Butadiene Styrene) modified asphalt and preparation method thereof

A technology of modifying asphalt and diatomite, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of small increase in softening point, high cost of modifiers, and high production costs, so as to improve the softening point and soften The effect of point improvement and light weight

Inactive Publication Date: 2013-04-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But take this kind of measure and often can bring following several problems: 1, simply by adding excessive SBS, the raising range of softening point is little; , The cost of SBS modifier is high, resulting in high production cost

Method used

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  • Diatomite compound SBS (Styrene Butadiene Styrene) modified asphalt and preparation method thereof
  • Diatomite compound SBS (Styrene Butadiene Styrene) modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 (90# base asphalt 90%, SBS modifier 3%, diatomaceous earth 3%, rubber oil 2%, sulfur 2%):

[0028] Take 450g Korean Ssangyong 90# matrix asphalt and pour it into a beaker, put the beaker into a modified asphalt shearing machine oil bath and heat it to 180°C, start the shearing machine and adjust the speed to 6000r / min, add thermoplastic styrene-butadiene rubber in sequence along the beaker wall 15g of SBS granules, 15g of diatomite granules and 10g of rubber oil, sheared for 2 hours, then stirred for 6 hours in an oil bath environment at 170-175°C, added 10g of sulfur stabilizer, and stirred for 1 hour to obtain a diatomite compound SBS modification Asphalt product 1, its properties are shown in Table 1.

[0029] Comparing the product 1 with the ordinary SBS modified asphalt prepared above, the softening point increased from 72.3 to 83.4, and the ductility was lost but it met the requirements of JTG F40--2004 of "Technical Specifications for Construction of Hi...

Embodiment 2

[0030] Example 2 (90# base asphalt 90%, SBS6%, diatomaceous earth 1%, rubber oil 1%, sulfur 2%):

[0031] Take 450g Korean Ssangyong 90# matrix asphalt and pour it into a beaker, put the beaker into a modified asphalt shearing machine oil bath and heat it to 180°C, start the shearing machine and adjust the speed to 6000r / min, add thermoplastic styrene-butadiene rubber in sequence along the beaker wall 30g of SBS particles, 5g of diatomite and 5g of rubber oil, sheared for 2 hours, stirred in an oil bath environment at 170-175°C for 6 hours, added 10g of sulfur stabilizer and stirred for 1 hour to obtain diatomite compound SBS modified asphalt product 2. Its performance is shown in Table 1. Compared with the ordinary SBS modified asphalt prepared under the same conditions, the softening point of product 2 is slightly improved. Because there is not enough diatomite filled in the network structure of SBS to absorb and swell the light components, the softening point does not incre...

Embodiment 3

[0032] Example 3 (90# base asphalt 85%, SBS6%, diatomaceous earth 4%, rubber oil 3%, sulfur 2%):

[0033] Take 425g Korean Ssangyong 90# matrix asphalt and pour it into a beaker, put the beaker into a modified asphalt shearing machine oil bath and heat it to 180°C, start the shearing machine and adjust the speed to 6000r / min, add thermoplastic styrene-butadiene rubber in sequence along the beaker wall 30g of SBS particles, 20g of diatomite, 15g of rubber oil, sheared for 2 hours, stirred in an oil bath environment at 170-175°C for 6 hours, added 10g of sulfur stabilizer and stirred for 1 hour to obtain diatomite compound SBS modified asphalt product 3. Its performance is shown in Table 1. Compared with the ordinary SBS modified asphalt prepared under the same conditions, the softening point index of product 3 has been greatly increased from 72.3°C to 90.1°C, and the loss of ductility is very small. Product 3 is especially suitable for tropical high-temperature climate areas H...

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Abstract

The invention discloses a diatomite compound SBS (Styrene Butadiene Styrene) modified asphalt and a preparation method thereof. The diatomite compound SBS modified asphalt is prepared from the following materials in percentage by weight: 85%-90% of matrix asphalt, 3%-6% of thermoplastic styrene-butadiene rubber (SBS), 1%-6% of diatomite, 1%-5% of rubber oil, 2% of sulphur, the sum of the materials in percentage by weight being 100%. The preparation method comprises the following steps of: heating up the matrix asphalt to 180 DEG C, and then adding SBS modifying agent, diatomite and rubber oil in percentage by weight to obtain mixture; uniformly mixing the mixture; stirring for six hours at the temperature of 170 DEG C to 175 DEG C; and adding 2% of sulphur and stirring the mixture for one hour to obtain the product. Compared with the prior art, the preparation method has the advantages that the softening point of the modified asphalt obtained by the method disclosed by the invention is improved by 10%, and the production cost of the modified asphalt with high softening point is saved. Therefore, the modified asphalt product can be used as an ideal pavement material for road engineering in a high-temperature region.

Description

technical field [0001] The invention relates to a technology for preparing road engineering modified asphalt, in particular to a compound modified asphalt containing diatomite and SBS and a preparation method thereof. Background technique [0002] At present, with the vigorous development of my country's highway traffic, SBS modified asphalt is widely used in high-grade pavement mixtures. Today, the high temperature rutting damage of pavement is still the main form of asphalt pavement damage. Especially in the design of SMA pavement, high-quality SBS modified asphalt raw materials must be guaranteed. The high-temperature performance of modified asphalt is mainly reflected in its softening point index, and the modified asphalt with a higher softening point has better high-temperature stability. At present, SBS modified asphalt is mainly used in domestic asphalt pavement, because the mixture bonded by high softening point modified asphalt has better high temperature stability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L9/06C08K13/02C08K3/36C08K3/34C08K3/06C08K5/01
Inventor 纪小平胡魁刘羽王帅蒋默识岳光华靳延庆
Owner CHANGAN UNIV
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