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Journal of Applied Sciences
Year: 2009 | Volume: 9 | Issue: 10 | Page No.: 1980-1984
DOI: 10.3923/jas.2009.1980.1984
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| Effects of Fiber Type and Content on the Rutting Performance of Stone Matrix Asphalt |
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H. Behbahani,
S. Nowbakht,
H. Fazaeli
and J. Rahmani
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Abstract:
The purpose of this study is to evaluate the effect
of fiber type and content on the rutting performance of stone matrix asphalt
mixtures. In this research two types, cellulose fibers (made in Iran and
Germany) and mineral fibers (rock wool) with various percentages (0.1-0.5%)
of the total weight of the Stone Matrix Asphalt (SMA) mixture were used
and after determining optimal bitumen content for each fiber percentage,
we examined their effect on SMA bulk specific gravity, Void in Mineral
Aggregate (VMA), void content, Marshall stability, Indirect Tensile Strength
(ITS) and flow parameters. Also results of dynamic creep test were used
as an indicator of rutting performance of SMA specimens. Results of the
laboratory tests showed that variation of fiber type and content can lead
to considerable changes in rutting performance of SMA. Specimens made
with 3% cellulose-GER (made in Germany) has resulted to highest value
of ITS and least permanent deformations. Also with considerations of potential
rutting, optimum percentage for each fiber type has been concluded. |
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