Print ISSN: 1681-6900

Online ISSN: 2412-0758

Author : Al-Khashab,

Stabilization of Expansive Clayey Soil Modified by Lime with an Emulsified Asphalt Addition

Al-Khashab; Mohammad Natheer; Al-Hayalee; Mohammed Thafer

Engineering and Technology Journal, 2008, Volume 26, Issue 10, Pages 1247-1262

This study deals with the possibility of the stabilization of expansive clayey soil
pre-treated by lime, with an emulsified asphalt addition.
Soil from the "2nd Kafaat" District in Mosul was chosen it is classified as medium to
high expansiveness in naturally.
The pre-treated soil was performed with (0.5, 1.0, and 1.5%) lime addition by
weight. After short period, emulsified asphalt was added with different percentages
namely (2, 4, 6 and 8) by weight, for optimum percentages of an emulsified asphalt to
give the most useful stabilization aspects.
The test result of lime addition alone showed that there was a considerable reduction in
soil plasticity, 1.5% of lime addition converted the clayey soil towards non-plastic types.
The emulsified asphalt addition to the mixture, caused slight increase in the plasticity
but, their values in the whole, remained below the value of the natural soil.
The specific gravity decreased with the emulsified asphalt addition as well as, a general
reduction, compatible with the increase in the optimum moisture contents.
The absorption values of the treated soil with the emulsified asphalt showed consequent
reduction as compared with the original one.
A significant reduction in swelling pressure and swelling percent were obtained as well
as an improvement in some values of the unconfined compressive strength were realized
at low percentages of emulsified asphalt addition, compatible with reduction in values of
the high percent additions