A kind of open-graded wearing layer asphalt mixture and its preparation method
A technology of asphalt mixture and wear layer, which is applied in the direction of climate change adaptation, etc., can solve the problems of interlayer slippage, accelerate the aging, segregation and aging of asphalt mortar in the mixture, and improve the efficiency of resource utilization and improve the resistance Water damage ability, effect of improving anti-aging performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0022] The preparation method of all embodiments in the present invention comprises the following steps:
[0023] 1) Heat SBS modified asphalt to 130°C, add warm mix agent, and mix in a mixing pot for 100 seconds to obtain SBS modified warm mix asphalt a, with a stirring rate of 550r / min;
[0024] 2) Mix and stir ethylhexyl methoxycinnamate, tocopheryl acetate and octocrylene evenly to obtain mixed liquid b, the stirring time is 2 minutes, and the stirring speed is 600 r / min;
[0025] 3) Keep the temperature of asphalt a at 130°C, add the mixed liquid b, and stir in the mixing pot for 85 seconds to obtain modified asphalt c, the stirring speed is 900r / min;
[0026] 4) Mix talcum powder, steel slag and aggregate evenly, and heat to 130°C to obtain a mixture;
[0027] 5) Add the modified asphalt c to the mixture of talcum powder, steel slag, aggregate and ordinary mineral powder at 130°C, and stir for 4 minutes to obtain an open-graded wear layer asphalt mixture.
[0028] The ...
Embodiment 1
[0031] In this example, the high-performance open-graded wear layer asphalt mixture is calculated according to the mass fraction, and its raw material formula is as follows: 70 parts of aggregate, 20 parts of steel slag, 5.5 parts of SBS modified asphalt, 3 parts of talcum powder, and 0.25 parts of methoxy Ethylhexyl cinnamate, 0.25 part tocopheryl acetate, 0.5 part octocrylene and 0.5 part warm mix.
Embodiment 2
[0033] In this embodiment, the high-performance open-graded wear layer asphalt mixture is calculated according to the mass fraction, and its raw material formula is as follows: 40 parts of aggregate, 50 parts of steel slag, 5.5 parts of SBS modified asphalt, 3 parts of talcum powder, and 0.25 parts of methoxy Ethylhexyl cinnamate, 0.25 part tocopheryl acetate, 0.5 part octocrylene and 0.5 part warm mix.
[0034] Compared with Example 1, the steel slag content in Example 2 was increased by 30 parts, and the aggregate content was reduced by 30 parts.
[0035] In Example 1 and Example 2, it can be seen that when the steel slag content was increased from 20% to 50%, the Los Angeles wear value was reduced from 17% to 14%, indicating that steel slag significantly improved the resistance of the open-graded wear layer mixture. Abrasion resistance; due to the same other components, the anti-aging performance does not change significantly; TSR increased from 85.7% to 88.4%, indicating t...
PUM
| Property | Measurement | Unit |
|---|---|---|
| voidage | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More