Keywords : problematic soils
Engineering and Technology Journal,
2010, Volume 28, Issue 19, Pages 5822-5832
In this paper, mechanical properties were studied for gypseous soil
brought up from Al-Axandria region, Babylon Governorate. Gypsum
content is equal to (40%). Many tests were employed on disturbed and
undisturbed samples collected at depth (1-1.5) m.
Clinker material used in cement was chosen as additive to study its
effect on improvement of gypseous soil by using three crushed percentages
(2, 4, & 6) %.
The results marked that (4) % clinker decreases the collapsibility
sharply; more than 73 % of improvement in collapse potential has been
achieved at this percent of clinker. Also, compressibility decreases with
increase of clinker percentage. The compression index decreased from 0.17
to 0.1 (29 – 41% reduction with increases of clinker).
The shear strength parameters of the treated soil determined by
direct shear test are more those than for natural soils due to increase in the
cohesion and decrease in angle of internal friction.