The Components of Cold Mix Asphalt Are Aggregate, Water, and Asphalt That Has Been Emulsified or Cut Back.
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In this article, we are going to talk about asphalt’s different aging process.
The influence of various media coupling effects and UV radiation on rubber asphalt properties was investigated using physical, rheological, and micro characteristics, and the structural features of asphalt were disclosed.
This was accomplished using an aging simulation of a self-made UV environment chamber.
The findings revealed that various media can speed the breakdown of rubber asphalt.
Asphalt's softening point, rutting factor, recoverable rate, fatigue factor, and stiffness modulus increased, but penetration, creep rate, and non-recoverable creep compliance decreased.
The coupling effect between acid and UV light had the greatest impact on asphalt rutting and fatigue cracking.
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The rubber asphalt functioned better at high temperatures after aging and poorly at low temperatures when it was more susceptible to fatigue damage.
When exposed to UV radiation, the absorption peaks of the carbonyl and sulfoxide groups are amplified due to the oxygen absorption reaction that causes asphalt to age, and the light components of the asphalt change to heavy ones.
These media expedited the process, causing the asphalt colloid structure to gradually transform into a gel structure.
The carbon black in the residual rubber powder boosted the anti-aging properties of the rubber asphalt.
The two basic types of asphalt aging are thermal oxygen aging and UV aging.
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Long-term use of asphalt pavement causes the internal structure of asphalt to alter due to the influence of external variables such as UV radiation, oxidation, and high temperatures.
Thermal oxygen aging can cause changes in the physical properties of asphalt.
The chemical link of asphalt can be disrupted by UV aging and recombined with oxygen, affecting the material's rheological properties.
Rubber asphalt created from rubber powder not only improves the properties of asphalt but also recycles trash in an environmentally responsible way.
Rubber asphalt is also less expensive than asphalt which has been treated with styrene butadiene styrene (SBS) or epoxy resin.
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As a result, understanding how rubber asphalt matures is critical before applying it.
Researchers typically study asphalt aging using an indoor aging simulation.
Studied the effect of modification on the anti-aging capacities of asphalt by simulating short- and long-term aging in the lab.
Studied the effect of sulfur on the anti-aging characteristics of rubber asphalt using a laboratory simulation of asphalt aging.
The pressure aging vessel (PAV) test was used to simulate long-term aging, and the thin-film oven test (TFOT) or rolling thin-film oven test (RTFOT) was used to simulate short-term aging.
Due to the lack of UV radiation, these test settings fall short of correctly reproducing the natural environment of pavement.