14. Weathering and Durability of Bituminous Materials
This chapter explores the weathering and durability of bituminous materials, focusing on their performance and longevity under various environmental conditions and traffic loads. Key factors influencing weathering include oxidation, UV radiation, and moisture intrusions, while durability depends on material properties and environmental conditions. Furthermore, various tests and innovations, such as the use of nano-additives, are discussed to enhance the performance of bituminous materials in pavement applications.
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What we have learnt
- Bituminous materials are critical to flexible pavement performance and reliability.
- Weathering mechanisms include oxidation, UV radiation, thermal effects, and moisture intrusion.
- Durability is influenced by material composition, air voids, aggregate-binder adhesion, and environmental conditions.
Key Concepts
- -- Weathering
- The physical and chemical degradation of bituminous binders and mixes due to atmospheric conditions.
- -- Durability
- The ability of bituminous materials to resist aging, disintegration, and maintain essential properties over time.
- -- Aging Simulation Tests
- Laboratory tests designed to simulate the aging processes that occur in bituminous materials under real-world conditions.
- -- Polymer Modified Bitumen (PMB)
- Bitumen that has been altered with polymers to enhance properties such as elasticity and resistance to oxidation.
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