Abstract: (3230 Views)
The use of geotextiles to postpone reflective cracks in asphalt overlay is a popular practice, so researchers are eager to calculate
its structural value. This research study has focused on this issue for geotextiles used in the roads of Iran. Twelve sections from
the Tehran-Qom road were tested each examined before and after construction of the overlay. The tests were of the Falling
Weight Deflectometer type, and at least twelve tests were conducted each time. The data from five sections (four for developing
the model and one for evaluating the output) allowed a new mathematical model to be developed. For the seven remaining
sections, some foreign and Iranian geotextiles were used as interlayers. The mean structural value for all of the geotextiles was
equivalent to that of a 2.92 cm-thick Hot Mix Asphalt overlay, while that for only the Iranian sections was equivalent to 2.28 cm.
Economic evaluations, based on construction costs, showed that in 2011 the use of geotextiles was economical in Iran, because
fuel and bitumen subsidies had been eliminated and different geotextile brands had been brought to market in the country.
Type of Study: Research Paper