A STONE MASTIC ASPHALT IS GAP GRADED BY USING BAGASSE FIBER(SUGAR CANE)

CIVIL ENGINEERING

The stone matrix asphalt (SMA) mixture is a gap-graded mix which is characterized by high coarse aggregates, high asphalt contents and fiber additives as stabilizers. Due to stone to stone contact and presence of high filler content, it acts as a stiff matrix and is best suitable for high volume roads and urban intersections where braking effects are more. In general, carbon fibers are added in SMA mixes to avoid oozing of bitumen from the mix. In the present study, in addition to the bagasse(sugarcane residue), polyester fibers will be added to the SMA mixes and its properties will be evaluated. Since, the bagasse fibers are easily available in India and comparatively cheap, it is decided to use in the current investigation. Detailed laboratory investigations will be carried out by preparing asphalt concrete mixtures by adding two types of fibers (bagasse and polyester) with dosages of 0.3%, 0.4% and 0.5% by weight of total mix. Volumetric properties of the mixes will be determined and various strength tests such as marshal stability will be conducted.

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