Nanoparticle modified asphalt and preparation method thereof

A modified bitumen and nanotechnology, which is applied in building components, building insulation materials, buildings, etc., can solve the problem that the improvement effect is not obvious, and achieve the effect of simple and easy preparation method, large cost advantage and low price.

Inactive Publication Date: 2011-03-30
SOUTHEAST UNIV
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Problems solved by technology

Ma Feng from Chang'an University and Liu Daliang from Changsha Jiaotong University respectively studied the effect of nano-calcium carbonate particles on the performance of asphalt. Ye Chao from Shaanxi Highway Vocational and Technical College used nano-SiO 2 Particle modified asphalt and its road performance can improve the performance of base asphalt, but it can be seen that the improvement effect is not obvious

Method used

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  • Nanoparticle modified asphalt and preparation method thereof

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Embodiment Construction

[0026] (1) Weigh an appropriate mass of layered silicate clay, SBS, nano-SiO 2 Particle and matrix bitumen, among which layered silicate clay, nano-SiO 2 The weight ratio of particles is: 1:0.05~0.2, the weight ratio of layered silicate clay and SBS is: 1:0~1, and the weight percentage of layered silicate clay and base asphalt is 0.01~0.09:1 respectively .

[0027] (2) Combine SBS and nano-SiO 2 Add the particles into the molten base asphalt, maintain the temperature at 100-200°C, and use a high-speed shear emulsifier at a speed of 1000-10000rpm to continuously shear and stir for 0.5-4

[0028] Hour.

[0029] (3) Finally, layered silicate clay was added to the shear-stirred SBS / nano-SiO 2 In the modified asphalt, the temperature is maintained at 100-200° C., and the shearing and stirring is continued at a speed of 1000-10000 rpm for 0.5-4 hours to obtain the composite modified asphalt to be prepared.

[0030] The nano material of the present invention is gas phase nano S...

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Abstract

The invention discloses nanometer sheet material modified asphalt and a preparation method thereof. The modified asphalt consists of phyllosilicate clay, nanometer SiO2 particles, styrene-butadiene-styrene (SBS) and matrix asphalt, wherein a weight ratio of the phyllosilicate clay to the SBS to the nanometer SiO2 particles is 1:0.5-1:0.05-2.0, the phyllosilicate clay accounts for 1 to 10 weight percent of the modified asphalt and the matrix asphalt accounts for 90 to 99 weight percent of the modified asphalt. The preparation method of the modified asphalt comprises the following steps of: adding a proper amount of nanometer SiO2 particles and SBS into melt matrix asphalt and performing primary shear stirring; and adding the phyllosilicate clay, maintaining the temperature of between 100 and 200 DEG C, and continuously performing shear stirring at the speed of between 500 and 10,000 rpm for 0.5 to 4 hours to ensure that various modifiers are dispersed and uniformly mixed in the matrix asphalt so as to prepare the modified asphalt. Compared with the matrix asphalt, the modified asphalt prepared by the method has remarkably improved high-temperature property, enhanced rutting resistance and improved temperature sensitivity.

Description

technical field [0001] The invention is a novel nano sheet material modified asphalt and its preparation process. The invention belongs to the technical field of highway pavement material preparation. Background technique [0002] Asphalt pavement is the main pavement structure in my country's high-grade highway pavement. The performance of asphalt pavement depends to a large extent on the quality of the asphalt mixture used. The unsatisfactory quality of asphalt mixture is first of all the unsatisfactory material quality, so the research on asphalt which plays a binding role in asphalt mixture has become the focus of road researchers. However, although asphalt manufacturers continue to explore new asphalt production processes to improve asphalt performance, and road design departments try their best to use high-quality heavy-traffic road asphalt, the use of many roads is still unsatisfactory. This is due to the insurmountable characteristics of asphalt itself, such as so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K3/34C08K3/36
CPCC04B26/26C04B14/06
Inventor 孙璐辛宪涛朱浩然
Owner SOUTHEAST UNIV
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