Author
Abstract
Sabkha soil is one of the many types of collapsible soils and in turn is on of the
many types of problematic soils. This soil is totally having good engineering
properties when dry ,i.e ,moderately bearing capacity with low settlement .But once
are wetted they loose their entire structure (collapse) and undergo very large
instantaneous settlement .A laboratory model test consists of a cylindrical steel
container of 270mm diameter and 300mm height, the soil is brought from Al-Khalis
discrete .The density of soil is controlled by placing the required weight inside the
container of known volume, to the required height .A square footing 60x60mm makes
from steel is used .The stress is applied from a fixed loading system designed
especially for model tests .In this study two types of treatment carried out ,the first
treatment is added fine gravel only with percentages (2%,4.5%,6%) to soil which is
not give good improvement .The second type of improvement is added 3% of cement
with fine gravel (4.5%,6%) percentages which give good improvement, reduced the
collapsibility to 84% .Also, when adding 3% of cement with 4.5% fine gravel to soil
,give good improvement, reduced the collapsibility to 90% .
Keywords
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