Asphalt powder asphalt equipment what are the main performance
The main performance of rubber powder asphalt equipment is reflected in the following five aspects:
1, improve the viscosity of asphalt:
Viscosity is an important indicator of high temperature stability of bitumen. High viscous bitumen not only enhances the anti-deformation ability, but also strengthens the cohesion between asphalt and gravel and has better sealing performance. Data show that 20% rubber content of rubber asphalt rubber, the dynamic viscosity at 190 ℃ and 4% SBS content at 135 ℃ when the dynamic viscosity value of about 3pa..s; rubber asphalt softening point than the base asphalt About 10 ° C,> 55 ° C. If you add 0.2% -0.5% per tonne of rubber modified asphalt SBS modifier, softening point can reach more than 70 ℃.
2, to improve the low temperature performance of asphalt:
1, improve the viscosity of asphalt:
The low temperature performance of asphalt refers to the low temperature brittleness and crack resistance. According to a South African company test comparison, the rubber brittle Point Vibram 4% SBS modified asphalt, reduced by about 9 ℃, up to -17 ℃ -19 ℃. Rubber asphalt good low temperature performance, in cold areas will significantly reduce road cracking and prolong the life of the road.
3, anti-aging, anti-fatigue performance improved significantly:
1, improve the viscosity of asphalt:
The addition of a large amount of waste tire rubber powder not only increases the anti-aging, oxidation resistance and thermal stability of the asphalt, but also provides the asphalt pavement with flexibility and fatigue resistance and crack resistance over a wide temperature range due to the excellent elasticity of the tire rubber , Thus extending the service life of the road. Data show that rubber asphalt pavement can improve the life of the road 1 to 3 times.
4, improve driving comfort and safety:
1, improve the viscosity of asphalt:
Due to the flexibility of the rubber pavement, the local unevenness of the buffer pavement can cause the vehicle to vibrate, improve the adhesion of the tire to the ground and shorten the braking distance, so that the comfort and safety of the vehicle are improved.
5, reduce traffic noise low:
1, improve the viscosity of asphalt:
With the development of highway construction and automobile industry, road noise has become a public hazard of urban residents. Therefore, reducing road noise has become an important social issue of concern to people. According to some scholars, the flexibility of rubber bitumen, combined with compounding and smooth pavement, can effectively reduce the noise of the wheels on the road. So the application of rubber asphalt lit a bright spot for the construction of urban roads, known as "muffler asphalt", it has been included in the planning of municipal construction. Data show that rubber asphalt pavement speed 50-100 km / h, the noise will be reduced 3-8 dB.
1, improve the viscosity of asphalt:
Viscosity is an important indicator of high temperature stability of bitumen. High viscous bitumen not only enhances the anti-deformation ability, but also strengthens the cohesion between asphalt and gravel and has better sealing performance. Data show that 20% rubber content of rubber asphalt rubber, the dynamic viscosity at 190 ℃ and 4% SBS content at 135 ℃ when the dynamic viscosity value of about 3pa..s; rubber asphalt softening point than the base asphalt About 10 ° C,> 55 ° C. If you add 0.2% -0.5% per tonne of rubber modified asphalt SBS modifier, softening point can reach more than 70 ℃.
2, to improve the low temperature performance of asphalt:
1, improve the viscosity of asphalt:
The low temperature performance of asphalt refers to the low temperature brittleness and crack resistance. According to a South African company test comparison, the rubber brittle Point Vibram 4% SBS modified asphalt, reduced by about 9 ℃, up to -17 ℃ -19 ℃. Rubber asphalt good low temperature performance, in cold areas will significantly reduce road cracking and prolong the life of the road.
3, anti-aging, anti-fatigue performance improved significantly:
1, improve the viscosity of asphalt:
The addition of a large amount of waste tire rubber powder not only increases the anti-aging, oxidation resistance and thermal stability of the asphalt, but also provides the asphalt pavement with flexibility and fatigue resistance and crack resistance over a wide temperature range due to the excellent elasticity of the tire rubber , Thus extending the service life of the road. Data show that rubber asphalt pavement can improve the life of the road 1 to 3 times.
4, improve driving comfort and safety:
1, improve the viscosity of asphalt:
Due to the flexibility of the rubber pavement, the local unevenness of the buffer pavement can cause the vehicle to vibrate, improve the adhesion of the tire to the ground and shorten the braking distance, so that the comfort and safety of the vehicle are improved.
5, reduce traffic noise low:
1, improve the viscosity of asphalt:
With the development of highway construction and automobile industry, road noise has become a public hazard of urban residents. Therefore, reducing road noise has become an important social issue of concern to people. According to some scholars, the flexibility of rubber bitumen, combined with compounding and smooth pavement, can effectively reduce the noise of the wheels on the road. So the application of rubber asphalt lit a bright spot for the construction of urban roads, known as "muffler asphalt", it has been included in the planning of municipal construction. Data show that rubber asphalt pavement speed 50-100 km / h, the noise will be reduced 3-8 dB.
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