TY - JOUR AU - C.P.G. Jayalath, AU - C. Gallage, AU - N.S. Miguntanna, PY - 2017/04/11 Y2 - 2024/03/29 TI - FACTORS AFFECTING THE SWELLING PRESSURE MEASURED BY THE OEDEMETER METHOD JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 11 IS - 24 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/2083 SP - 2397-2402 AB - <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> ER -