Reaction on the Stability of Stone Matrix Asphalt Using Bamboo Fibre as Stabilizer and Slag as Aggregate Alternate
Keywords:
Ageing, Flexural Strength, Permanent Deformation Resistance, Durability, Service LifeAbstract
Stone matrix asphalt (SMA), originating in Germany in the 1960s, now provides substantial benefits such as improved resistance to permanent deformation, greater durability, extended service life, enhanced aging characteristics, and heightened resistance to cracking, fatigue, wear, and skidding, while also reducing noise levels. It comprises a gap-graded aggregate mixture maximizing asphalt-cement content and coarse aggregate fractions, resulting in a stable, rut-resistant, and tough blend reliant on aggregate-aggregate contact for strength. The addition of a rich mortar binder further bolsters durability. SMA samples are prepared by blending coarse aggregate, fine aggregate, and filler based on standard code gradation charts, with or without stabilizers. Bamboo fiber, chosen as a cost-effective stabilizer, boasts high strength, tensile, flexural, and impact strength, as well as thinness, durability, tenacity, and stability. This project involves crafting SMA mixes using stone as coarse aggregate, partially replacing coarse aggregate with slag, and employing various stabilizers, with results compared across different bitumen content levels ranging from 4% to 7%. Stabilizers are added at an optimum rate of 0.3% of the sample weight.
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