Preparation method of hydrothermal carbon modified asphalt

A technology for modifying asphalt and hydrothermal carbon, which is used in construction, building components, building insulation materials, etc., can solve the problems of poor dispersibility and poor modification effect of hydrothermal carbon materials, improve road performance and reduce damage. , the effect of strengthening the internal cohesion

Active Publication Date: 2022-07-01
CHINA RAILWAY 16TH BUREAU GRP ROAD & BRIDGE ENG CO LTD +3
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Problems solved by technology

[0004] The present invention aims to solve the technical problems of poor dispersion of hydrothermal carbon materials in asphalt and poor modification effect existing in the existing method of modifying asphalt by using hydrothermal carbon materials, and provides a preparation method of hydrothermal carbon modified asphalt method

Method used

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  • Preparation method of hydrothermal carbon modified asphalt
  • Preparation method of hydrothermal carbon modified asphalt
  • Preparation method of hydrothermal carbon modified asphalt

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: The preparation method of the hydrothermal carbon modified asphalt of the present embodiment is carried out according to the following steps:

[0030] 1. Using waste corn stalks as carbon source, hydrothermal carbonization is adopted. The specific hydrothermal carbonization operation is as follows: after pulverizing the waste corn stalks, put them into a hydrothermal reaction kettle, and then add corn stalk powder with a mass of 15 times the mass of plasma water, seal the hydrothermal reaction kettle, put the reaction kettle into the heating furnace, heat it up to 250 ° C and keep it for 3 hours, after the hydrothermal reaction kettle is cooled to room temperature, filter the reaction product with filter paper and separate, Finally, the obtained solid product was placed in an oven with a temperature of 80° C. for 12 hours to obtain agglomerated and granular hydrothermal carbon;

[0031] 2. Immerse the hydrothermal carbon in liquid nitrogen for 3 minutes; ...

Embodiment 2

[0042] Embodiment 2: The preparation method of the hydrothermal carbon modified asphalt of the present embodiment is carried out according to the following steps:

[0043] 1. Using waste wood as carbon source, the hydrothermal carbon method is used for carbonization; the specific hydrothermal carbonization operation is: pulverize the waste wood into powder, put it into the hydrothermal reaction kettle, and then add 20 times the mass of wood powder. After the hydrothermal reactor was cooled to room temperature, filter paper was used to filter and separate the reaction product, and finally the obtained solid product was placed at a temperature of 100 °C. Keep in the oven for 12 hours to obtain agglomerated and granular hydrothermal charcoal;

[0044] 2. Immerse the hydrothermal carbon in liquid nitrogen for 5 minutes;

[0045] 3. Add the hydrothermal carbon treated with liquid nitrogen to the grinder for grinding, and analyze the particle size of the ground hydrothermal carbon ...

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Abstract

The invention discloses a preparation method of hydrothermal carbon modified asphalt, relates to a preparation method of modified asphalt, and aims to solve the technical problems of poor dispersity and poor modification effect of a hydrothermal carbon material in asphalt in the conventional method for modifying asphalt by utilizing the hydrothermal carbon material. The method comprises the following steps: by taking waste biomass as a carbon source, carbonizing by adopting a hydrothermal carbon method to obtain bulk and granular hydrothermal carbon; the hydrothermal carbon is immersed in liquid nitrogen for soaking treatment and then ground until the particle size reaches 1-100 m, and hydrothermal carbon powder is obtained; adding the hydrothermal carbon powder into the asphalt, and shearing and stirring by adopting a high-speed shearing stirrer; and naturally cooling to obtain the hydrothermal carbon modified asphalt. The hydrothermal carbon modified asphalt has good high-temperature rutting resistance and medium-temperature fatigue resistance, the fatigue life of the hydrothermal carbon modified asphalt is respectively prolonged by 212.6% and 271.8% compared with that of matrix asphalt at 19 DEG C and 25 DEG C, and the hydrothermal carbon modified asphalt can be used in high-temperature and high-load areas.

Description

technical field [0001] The invention relates to a preparation method of modified asphalt, and belongs to the field of road building materials. Background technique [0002] Flexible pavement, that is, asphalt pavement, is widely used in the world, especially on high-grade highways, due to its many advantages such as good road performance, short construction period, easy maintenance, and low driving noise. Since the beginning of the 21st century, large-scale road construction has been carried out, especially in developing countries, and the demand for petroleum asphalt has also grown at an incredible rate. The source of petroleum bitumen is mainly extracted from crude oil, with limited reserves and huge energy consumption in the refining process. Therefore, finding alternatives to petroleum asphalt has become a general concern in the field of road engineering. [0003] In recent years, the hydrothermal carbonization of waste biomass has attracted the attention of more and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K9/02C08K3/04
CPCC08K9/02C08K3/04C08K2201/003C08L2201/08C08L95/00
Inventor 陈铁军余森开莫若明郑宏利王庆阳丁力赵杰李辉李宁张建龙王大为徐加秋
Owner CHINA RAILWAY 16TH BUREAU GRP ROAD & BRIDGE ENG CO LTD
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