TOTAL AND MATRIC SUCTION MEASUREMENT OF UNSATURATED SOILS IN BAGHDAD REGION BY FILTER PAPER METHOD

Soil suction is one of the most important parameters describing moisture condition unsaturated soils. The measurement soil crucial for applying theories engineering behavior soils.The filter paper method techniques In this paper, five samples were collected from sites within Baghdad city – al-Rasafa region. These soils have different properties and they prepared at degrees saturation. For each sample, total matric measured by Then correlations made between suction. It was concluded that increases with decrease degree relationships water content are approximately linear indicate increase content. shear strength.