Use of Sisal Fiber as a Stabilizer in Stone Mix Asphalt and as an Additive in Bitumen
Keywords:Bituminous Concrete (BC), Stone Matrix Asphalt (SMA), Sisal Fiber, Marshall Properties, Static Indirect Tensile Strength, Static Creep
The flexible pavements play in important role in the country especially in India. The initial and maintenance cost of these pavements are very less as compared to the rigid or semi-rigid pavements. The main constituent of flexible pavements bitumen which is complex mixture of coarse and fine aggregates and sometimes binders and fillers are also used in it. There are various types of bitumen mixes in which Hot Mix Asphalt is one of them. If HMA is dense graded then it is called Bituminous Concrete (BC) and if it is gap graded then called Stone Matrix Asphalt (SMA). In SMA stabilizing additives are used to avoid defunct in the bitumen mixture. The additives used may be polymer, mineral or cellulose fibers etc.
In the present work, an effort has been made to study the special impact of fiber called Sisal, as stabilizer addictive in SMA and in BC. Mixing aggregate gradation is maintained as per MORT and H specification, the percentage of fiber ranges in between 0-0.5 and that of binder ranges between 4-7 of entire mixture. Optimum Binder Content percentage ranges in 5.0-5.21 for BC and SMA respectively and Optimum Fiber Content percentage remains 0.31 for both SMA and BC. Both the mixes are the BC and SMA mixtures are built up at OBC and OFC and are tested to estimate the special impact of adding fiber on mixture performance. And it was found that use of this fiber enhance the properties of the mixture.
How to cite this article:
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