Asphalt modifier and preparation method thereof

An asphalt modifier and modification technology, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of unstable asphalt performance, poor toughness, and unguaranteed performance of asphalt pavement, and achieve enhanced road performance. Performance, improvement of heat resistance, effect of improving asphalt toughness

Inactive Publication Date: 2012-07-11
上海嘉亘材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the variable valence metal ions and anionic charge impurities contained in the montmorillonite layer, as well as the complicated pretreatment procedures, the substrate of the SBS asphalt modifier is degraded, so the performance of the modified asphalt is unstable and the toughness is poor. Performance of asphalt pavement is not guaranteed

Method used

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Effect test

preparation example Construction

[0046] The invention also provides a method for preparing an asphalt modifier, including:

[0047] 40wt% to 60wt% styrene-butadiene-styrene block copolymer;

[0048] 1wt%~10wt% of polystyrene-polyethylene-polybutene-polystyrene;

[0049] 5wt%~15wt% polyethylene;

[0050] 10wt%~30wt% hydrocarbon resin;

[0051] 10wt%-30wt% aromatic oil and 1wt%-10wt% organically modified kaolin are melt blended to obtain an asphalt modifier.

[0052] In the present invention, SBS, SEBS, polyethylene, hydrocarbon resin and aromatic oil are melt-blended to form thermoplastic rubber, and are melt-blended with organic modified kaolin to prepare asphalt modifier. After the organically modified kaolin is melted and blended with the thermoplastic rubber, due to the interaction between the organically modified kaolin and the thermoplastic rubber, the organically modified kaolin is intercalated by the thermoplastic rubber layer, and the organically modified kaolin is evenly dispersed in the thermoplastic rubber, ...

Embodiment 1

[0057] Mix 50kg of SBS, 3kg of SEBS, 19kg of carbon nine resin, 16kg of rubber oil, 10kg of polyethylene and 2kg of silane-modified kaolin, and extrude them by a double screw extruder to obtain an asphalt modifier. The temperature of the double screw extruder is 165°C, the rotation speed is 260 rpm, and the output is 120 kg / h. The asphalt modifier prepared in this example was tested in accordance with the "Technical Specification for Highway Asphalt Pavement Construction" (JTG F-40-2004), and it was determined that the residual stability of the immersion Marshall test was 94.2%, and the residual strength of the cold-melt splitting test The ratio is 93.1%, the dynamic stability of the rutting test is 3675 times / mm, and the low-temperature bending failure strain is 4402με. Therefore, the asphalt modifier prepared in this example has a good asphalt toughening effect.

Embodiment 2

[0059] 52kg of SBS, 2kg of SEBS, 17kg of carbon nine resin, 16kg of rubber oil, 9kg of polyethylene and 4kg of silane-modified kaolin were mixed uniformly and extruded by a double screw extruder to obtain an asphalt modifier. The temperature of the double screw extruder is 160°C, the rotation speed is 260 rpm, and the output is 120 kg / h. The asphalt modifier prepared in this example was tested in accordance with "Technical Specification for Highway Asphalt Pavement Construction" (JTG F-40-2004), and the low-temperature bending failure strain was 4551 με. The asphalt modifier prepared in this example has a good asphalt toughening effect.

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Abstract

The embodiment of the invention discloses an asphalt modifier and a preparation method thereof. The asphalt modifier is prepared by melting and blending organic modified kaolin with thermoplastic rubber which is formed by melting and blending SBS, SEBS, polyethylene, hydrocarbon resin and aromatic oil, wherein after being melted and blended with the thermoplastic rubber, the organic modified kaolin is intercalated by the thermoplastic rubber to prepare the asphalt modifier with an intercalation structure. Compared with the prior art, in the asphalt modifier, the organic modified kaolin does not contain variable metallic ions and the like, so degradation of the SBS is prevented. In the process of modifying asphalt by using the asphalt modifier, because of the intercalation structure of theasphalt modifier, the asphalt modifier is dispersed in asphalt by taking the organic modified kaolin as a core to form a uniform and stable system, has the effect of improving the toughness of the asphalt, and reinforces the road property of asphalt pavements.

Description

Technical field [0001] The invention relates to the technical field of composite materials, and more specifically, to an asphalt modifier and a preparation method thereof. Background technique [0002] Asphalt has water resistance and corrosion resistance, and is currently widely used as a paving material and covering material for roads. However, the asphalt pavement often cracks, which will directly affect the service life of the pavement. Due to the cracking of the asphalt pavement, the water on the pavement infiltrates the base layer. At the same time, under the pressure of the traffic, the pavement base layer is damaged, thereby destroying the road surface and forming potholes. Therefore, it is particularly important to modify the asphalt to enhance the toughness of the asphalt. [0003] The existing commonly used method for modifying asphalt is to mix SBS with thermoplastic rubber SBS at high temperature after shearing, and then add stabilizers and other additives to produce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L23/06C08K13/06C08K9/10C08K3/34C08K5/01
Inventor 侯罡王平平
Owner 上海嘉亘材料科技有限公司
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