Characteristics of Artificial, Gypsified and Natural Gypseous Soils under LeachingCondition
Engineering and Technology Journal,
2019, Volume 37, Issue 8A, Pages 313-325
10.30684/etj.37.8A.2
Abstract
The gypseous soil known as a problematic soil with a collapsibilitybehaviour, three types of gypseous soils are prepared (artificial, gypsified and
natural gypseous soil), special manufactured leaching system used for testing the
soil models, the main objectives of this study are testing the soil models in dry and
leaching conditions for measuring earth and pore water pressures with
displacements and gypsum dissolved of the soil models under monotonic and
repeated loads within relatively large physical model. The results at leaching
process for three days revealed that the natural and gypsified soils have earth
pressures reach about (150 kPa) and (4 to 4.5 cm) for displacements, while pore
water pressure increased until reaches about (120 kPa), but for artificial gypseous
soil, earth pressures reaches about (300 kPa) and (1 cm) for displacements. TDS
and SO3 content measured and reaches to about (1900 ppm) for gypsified and
natural soils while reaches about (350 ppm) for artificial gypseous soil. STATISICA
program used to verify the results with a very good agreement reaches to 95% of
the statistical models.
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