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1. Introduction
The roads in Korea have been paved with latest asphalt paving technology
since the late 1960's. Nevertheless, after more than 3 decades, the inherent
problem with the asphalt concrete pavement, which is the deterioration of the
structural elements at high temperature and cracking at low temperature, has not
been solved satisfactorily. The road pavement in the city and important
highways, where heavy vehicles pass through, are subject to deformation of
rutting especially due to high temperature in summer and low temperature
cracking due to repetitive load bearing especially in winter. In order to
overcome these problems, HMA design and the grade changing of the asphalt binder
have been tried in the past with some improvement. Nowadays, new additive
materials have been developed to improve the physical and chemical properties of
asphalt binder.
This investigation has the research objective of
obtaining data to apply in pavement thickness design by studying the effect of
adding DAMA to 5 kinds of asphalt mixtures (dense graded 19mm, drain graded
13mm, drain graded 19mm, superpave graded 19mm, SMA graded 19mm). |
