Method for improving dissolving speed of rubber in asphalt

A technology of dissolving speed and asphalt, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problems of difficult production and construction, difficult storage, too fast performance decay, etc., to improve the softening point of asphalt and anti-aging performance, improve Elasticity of the rubber compound and the effect of increasing the dissolution rate

Active Publication Date: 2019-11-29
海南省先进天然橡胶复合材料工程研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SBS, SBR modified asphalt and waste tire rubber powder asphalt are commonly used at home and abroad, but these modified asphalts have certain technical disadvantages
Problems such as high processing temperature (above 190°C), high energy consumption, difficult production and construction, difficult storage (less than 24 hours), fast performance decay, and inability to transport long distances make the application fields of waste tire rubber powder modified asphalt and The scope of use is limited, which affects its overall promotion and application in our country

Method used

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  • Method for improving dissolving speed of rubber in asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for improving the dissolution rate of rubber in asphalt comprises the following steps:

[0019] S1. Mix natural rubber: asphalt: aromatic oil: carbon black at a volume ratio of 100:23:15:21 for 5 minutes at a temperature of 100° C., mix them evenly, and press and granulate to obtain a rubber compound;

[0020] S2. Soak the mixed rubber in aromatic oil for 12 hours, and the aromatic oil is 1 times the volume of the mixed rubber to make it swell;

[0021] S3. Take out the soaked mixed rubber and put it into the asphalt. The mass ratio of mixed rubber to asphalt is 3:100. At a temperature of 150°C, stir at 300r / min, then turn it to 800r / min, and then turn it to 300r / min. After stirring for min, it was dissolved to obtain a natural rubber modified asphalt sample.

Embodiment 2

[0023] The method for improving the dissolution rate of rubber in asphalt comprises the following steps:

[0024] S1. Mix natural rubber: bitumen: cosolvent: reinforcing agent at a volume ratio of 100:45:40:63 for 10 minutes at a temperature of 140°C, mix them evenly, and press and granulate to obtain a rubber compound. The reinforcing agent is composed of carbon black and cetyl alcohol at a volume ratio of 1:1;

[0025] S2. Put the mixed rubber into the co-solvent, the mass ratio of the mixed rubber to asphalt is 2:25, soak for 30h, the co-solvent is 3 times the volume of the mixed rubber to make it swell;

[0026] The co-solvents in the above steps S2 and S3 are composed of polystyrene and aromatic oil with a volume ratio of 1:2;

[0027] S3. Take out the soaked mixed rubber and put it into the asphalt at a temperature of 200°C. Stir at 800r / min, then turn to 1200r / min to stir, and then turn to 800r / min to stir and dissolve to obtain a natural rubber modified asphalt sample...

Embodiment 3

[0029] The method for improving the dissolution rate of rubber in asphalt comprises the following steps:

[0030] S1. Mix natural rubber: asphalt: cosolvent: reinforcing agent at a volume ratio of 100:34:27:42 for 8 minutes at a temperature of 120° C., mix it evenly, and press it into granules to obtain a rubber compound. The above The reinforcing agent is composed of carbon black, cetyl alcohol and stearyl alcohol with a volume ratio of 1:2.5:3.2;

[0031] S2. Soak the mixed rubber in a cosolvent for 24 hours, and the cosolvent is twice the volume of the mixed rubber to make it swell;

[0032] The co-solvents in the above steps S2 and S3 are composed of polystyrene, aromatic oil, and methylparaben with a volume ratio of 1:2:2;

[0033] S3. Take out the soaked mixed rubber and put it into asphalt. The mass ratio of mixed rubber to asphalt is 1:20. At a temperature of 170°C, stir at 500r / min, then turn to 1000r / min, and then turn to 500r / min. After stirring for min, it was di...

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Abstract

The invention provides a method for improving the dissolving speed of rubber in asphalt. The method comprises the following steps: mixing natural rubber, asphalt, a cosolvent and a reinforcing agent in proportion, blending, reasonably controlling the temperature and time to prepare mixed rubber, soaking the mixed rubber and then scientifically proportioning the mixed rubber with the asphalt, selecting the cosolvent and the reinforcing agent with the best effect, controlling the stirring temperature and speed to accelerate the dissolving speed of rubber in asphalt, improve the softening point and aging resistance of asphalt, and enable the prepared natural asphalt rubber to have good economic benefits and environmental protection benefits.

Description

technical field [0001] The invention relates to the field of modified asphalt, in particular to a method for improving the dissolution rate of rubber in asphalt. Background technique [0002] The design life of the asphalt pavement of high-grade highways in my country is generally 15 years, but from the actual situation in our country, the actual service life of the asphalt pavement structure of most highways that has been opened to traffic is far from reaching the design life, early damage is very common, and many of them are in operation. After the short 2-3 years, the long 8-10 years will enter the period of large-scale maintenance and renovation. Summarize the causes of early damage to asphalt pavement on expressways, mainly including: pavement damage caused by insufficient subgrade bearing capacity due to improper treatment of soft foundation, insufficient subgrade rolling, and subgrade filling that does not meet the design requirements; asphalt surface layer caused by c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L95/00C08L25/06C08L91/00C08K5/134C08K3/04C08K5/05
CPCC08L7/00C08K2201/014C08L2205/035C08L2205/03C08L95/00C08L91/00C08K3/04C08L25/06C08K5/05C08K5/1345
Inventor 吴文康唐海龙张艺袁意朱德创卓容燕冯富强乔坤陈垂生王宁符启敏刘威
Owner 海南省先进天然橡胶复合材料工程研究中心有限公司
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