(2018) Abdulwahab R., Ibitoye B.A, Akinyele M.T., Ahmed N.T
The importance of soil stabilization in road construction cannot be
overemphasized as it improves the geotechnical properties of the lateritic
soil. It is not in all cases that soil has the desired geotechnical properties in its
natural state; hence there is need for modification. The study was carried out
in two phases. The first phase was to determine the geotechnical properties of
the soil without adding any additives (control experiment) and the second
phase was to add varying percentage of additives (test experiment).Woodash
was added to the soil sample in varying amount of (0, 2,4,6,8 and 10 of
weight of sample) to stabilize the soil while the following tests; Atterberg’s
limit, Compaction and California Bearing Ratio) were carried out on the
stabilized soil. The results showed that the addition of woodash can
significantly increase the strength of the soil. It was found that there was an
increase in Optimum Moisture Content from 7.7% at 0% woodash to 17.23%
at 10% woodash and with a corresponding decrease in Maximum Dry
Density from 1970 kg/m3 at 0% woodash to 1840 kg/m3 at 10% wood ash.
The CBR value increases from 31.44% at 0% woodash to 46.13% at 10%
woodash; hence percentage increase of 46.72%.