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Nano-polymer compound modified asphalt and preparation method thereof

A technology of composite modified asphalt and nano-polymer, which is applied in the direction of building structure, building components, building insulation materials, etc., and can solve the problems of preparation method of nano-polymer composite modified asphalt, low-temperature performance improvement of difficult-matrix asphalt, etc. , to achieve the effect of simple and easy preparation method, improved high temperature performance and low temperature performance

Inactive Publication Date: 2015-01-14
上海频谱顿交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The applicant analyzes the above-mentioned existing nano-material modified asphalt technical means, and there are the following defects: (1) the existing nano-material modified asphalt technical means can only better improve the high-temperature performance of matrix asphalt, and it is difficult to improve the low-temperature performance of matrix asphalt. Better improvement; (2) There is no suitable preparation method for nano-polymer composite modified asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 5 grams of nano-SiO 2 Particles and 25 grams of bentonite are added to 500 grams of molten road base asphalt, maintained at 120°C, sheared and stirred at 1000 rpm for 15 minutes, then added with 15 grams of SBR and 20 grams of SBS, heated and maintained at 160°C , shearing and stirring at 3000 rpm for 45 minutes to obtain a composite modified asphalt product. The performance test results are as follows:

[0022] Test indicators

[0023] Penetration (100g, 5s, 25℃) / 0.1mm

Embodiment 2

[0025] Weigh 2.5 g of nano-SiO 2 Particles and 15 grams of bentonite were added to 500 grams of molten road base asphalt, maintained at 150 ° C, sheared and stirred at 5000 rpm for 10 minutes, then added 25 grams of SBR and 10 grams of SBS, heated and maintained at 190 ° C , shearing and stirring at 8000 rpm for 40 minutes to obtain a composite modified asphalt product. The performance test results are as follows:

[0026] Test indicators

Embodiment 3

[0028] Weigh 20 grams of bentonite, add it to 500 grams of molten road base asphalt, maintain the temperature at 135 ° C, shear and stir at 3000 rpm for 30 minutes, then add 30 grams of SBR, heat and maintain the temperature at 175 ° C, at 5000 rpm Stir under shear for 60 minutes to obtain a composite modified asphalt product. The performance test results are as follows:

[0029] Test indicators

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PUM

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Abstract

The invention discloses nano-polymer compound modified asphalt. The nano-polymer compound modified asphalt comprises a nanomaterial, a polymer and matrix asphalt, wherein the nanomaterial is one or two of nano SiO2 particles and bentonite, and the polymer is one or two of styrene-butadiene-styrene block copolymer and butadiene styrene rubber. The invention further discloses a preparation method of the nano-polymer compound modified asphalt. The prepared compound modified asphalt is obviously improved in high-temperature performance and low-temperature performance compared with the matrix asphalt.

Description

technical field [0001] The invention belongs to the field of traffic civil engineering, and relates to a nano-polymer composite modified asphalt and a preparation method thereof. Background technique [0002] Nanomaterials refer to materials with at least one dimension in the nanoscale (1-100nm) of the three-dimensional spatial scale. Due to the large specific surface area and high activity of nanomaterials, it can increase the cohesion of the matrix asphalt, making the matrix asphalt difficult to deform, soften and flow at high temperatures, thereby improving the high temperature performance of the matrix asphalt; at the same time, the nanomaterials are uniformly dispersed in the matrix asphalt, The formation of a micro-skeleton structure tightly combines the base asphalt, which is conducive to improving the friction performance and anti-aging performance of the base asphalt. Therefore, nanomaterials have been widely used to improve the performance of the base asphalt. At ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/06C08K3/36C08K3/34
Inventor 孙璐于鹏
Owner 上海频谱顿交通科技有限公司
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