Improvement of Subgrade Soils by Using Marble Dust-(Libya, Case Study)

Abstract

the practice of using waste materials to modify the
properties of poor soils has become increasingly important in
geotechnical engineering. In recent years, much research has
been devoted to the effect of this waste material on soil
properties. This study aims to address the influence of marble
dust powder on the performance of subgrade. Thus, soils
mixed with different percentages of marble dust were tested.
The CBR test and modified proctor have been used to
evaluate the performance of the soils mixed with marble dust.
The statistical analysis illustrated that marble dust
significantly enhanced the properties of the soils. The study
concludes that an addition of 10% of marble dust to untreated
(control) soils yields the most satisfactory results among other
percentages of marble dust. The study recommends the use of
marble dust in geotechnical construction.