Author/Authors :
Roustaei، Mahya نويسنده Toosi University of Technology , , Ghazavi، Mahmoud نويسنده Civil Engineering at Khaje Nasir Toosi University of Technology , , Aliaghaei، Eisa نويسنده Imam Khomeini International University, Qazvin. ,
Abstract :
During recent years, processed used tires such as tire shreds, tire chips, tire
bungs, and tire crumbs have been applied in order to improve the mechanical properties
of soil mixtures. Finding more bene cial ways of using waste tires, this paper assessed the
in
uence of adding tire crumbs to a clayey soil which was a ected by freeze-thaw cycles.
Freeze-thaw cycling is a weathering process which occurs in cold climates during winter
and spring and considerably changes the engineering properties of soils. In the present
study, a clayey soil was mixed with six di erent percentages of tire crumbs (0, 0.5, 1, 1.5,
2, 2.5) and evaluated by triaxial compression tests under three di erent con ning pressures
(30, 60, 90 kPa) after the soil was subjected to 1, 3, 6, and 9 cycles of freeze-thaw. It
has been found that for the investigated soil, using 2.5% of tire crumbs decreases the
cohesion reduction ratio by about 24% and the resilient modulus reduction ratio by about
6-42% during the cycles. Hence, although the addition of tire crumbs does not considerably
a ect the strength reduction of soil during freeze-thaw cycles, it can reduce the changes of
cohesion and resilient modulus of the soil, e ectively
