@article{C.P.G. Jayalath_C. Gallage_N.S. Miguntanna_2017, title={FACTORS AFFECTING THE SWELLING PRESSURE MEASURED BY THE OEDEMETER METHOD}, volume={11}, url={https://geomatejournal.com/geomate/article/view/2083}, abstractNote={<p>Expansive soils are common in arid and semi-arid climate regions of the world and cause<br>severe problems on civil engineering structures. The Swelling potential of the expansive soil mainly depends<br>upon the properties of soil and environmental factors, and stress conditions. Swelling pressure is a key<br>parameter used in designing structures in and on expansive soil. The swelling pressure of soil is measured in<br>the laboratory using a representative soil samples. The size and the surface friction of the sample ring used in<br>the swelling pressure test have effects on the measured swelling pressure and they have not properly been<br>investigated. In this study, a series of constant volume swelling tests were conducted using an automated<br>consolidation-swell apparatus to evaluate the effect of sample ring size, ring friction, initial dry density, and<br>initial moisture content (IMC). Test results indicate an exponential growing trend of swelling pressure when<br>the dry density is increased. Similarly, high swell pressures are achieved when the IMC is increased for the<br>same dry density. A higher swelling pressure was measured when the friction of the specimen ring was<br>reduced. The measured swelling pressure increases with increasing the height of the sampling ring and it<br>decreases when the ring diameter is increased. Therefore, it is recommended to use a standard sample ring<br>reducing inside wall friction using lubricants when measuring the swelling pressure in the laboratory.<br>Further, the sample ring size, initial density and initial moisture content of soil should be given when<br>reporting swelling pressure of soil.</p>}, number={24}, journal={GEOMATE Journal}, author={C.P.G. Jayalath and C. Gallage and N.S. Miguntanna}, year={2017}, month={Apr.}, pages={2397–2402} }