Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIV
Written by Ernest Daniel OLINIC
The main geotechnical parameter indicating the presence of active clays is the swelling pressure, which is globally determined using at least three different methods. In Romania, however, the swelling pressure is determined using only one method (through the compressibility test in oedometer on initially saturated samples). Regardless of the method used, the initial moisture content significantly influences the results. Two types of moisture content are typically considered: natural moisture content (according to STAS 1913/12-88) and the shrinkage limit (according to NP 126-2010). In current practice, the initial moisture content is usually the natural moisture content. However, by saturating the sample, only the swelling characteristics of the soil are identified, not the shrinkage characteristics. This article aims to synthesize the methods for determining the specific properties of active clays, based on international technical standards and norms.
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