Fibrous additive for asphalt paving compositions
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United States of America Patent
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Apr 27, 1999
Issued Date -
N/A
app pub date -
May 14, 1997
filing date -
Mar 22, 1996
priority date (Note) -
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Abstract
The present invention describes a fiber material for use in mastic asphalt in roadbuilding for stabilizing the binder during transport, storage and incorporation, said fiber material being a macromolecular product including at least 95% of polyethylene terephthalate, the diameter of the individual fibers being .gtoreq.0.1 mm, the length to diameter ratio exceeding 5 on average, and the particle size distribution, measured as sieve passthrough as per the draft code of practice for the supply and testing of stabilizing materials in asphalt road construction in line with TP Min-StB Part 6.3.2, producing a proportion of at least 90% for the fractions .ltoreq.0.71 mm and at least 70% for the fractions .ltoreq.0.4 mm, and this product being manufactured by comminution from waste materials based on polyethylene terephthalate monofilaments.
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