| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 84 === Due to the subtropical situation of Taiwan, not only is the
weather here hot and humid, but the monsoon is quite long.
Under the circumstances if the Pavement cannot drain the
rainwater rapidly, the water will splash and the skid
resistance of pavement will be reduced owing to water film when
the vehicle pass quickly, which may severely affect the
driver''s sight and security.
Now part of the Sun Yat-sen Freeway and Second Northern Freeway
are pavedwith a layer of 1.5cm open grading; however, the effect
is not desirable. Therefore, here we are trying to research
on the optimal design method of porous asphalt based on the
grading of European Porous Asphalt along with thefiber and lime
as addition and anti-stripping agent. We also adopt AC-20 and
other several modified asphalt as binder.
The design method of porous asphalt in this research, including
the Asphalt Adhesion Test and Cantabrian Abrasion Test and
so on, has determined the optimal asphalt content. The test
specimens are made by Gyratory Testing Machine (GTM). Its
mechanical properties are evaluated by Resilient Modulus,
Indirect Tensile Test, etc. In addition, we evaluate the
durability of porous asphalt in Ultraviolet Chamber and by
Pressure Oxidation Vessel. As to the resistance to
deformation, the skid resistance, and the draining capacity of
porous asphalt, they can all be evaluated by usable methods in
our laboratory. From the results of the research, the AC-20
asphalt mixture made with fiber does reduce the lost of
asphalt effectively during the process of this design method.
However, the effect of the modified asphalt is still more
obvious in the Cantabrian Abrasion Test. As to all mechanical
properties test,porous asphalt overweighs open-grading,
particularly in Permeability Coefficient Test, the
permeability of porous asphalt is even triple the open-
grading. As a result, in the rainy environment of Taiwan, porous
asphalt should have great value in practical use.
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