Preliminary communication
ADVANTAGES AND DISADVANTAGES OF MODERN LABORATORY MEASUREMENT OF THE COEFFICIENT OF PERMEABILITY FOR SOIL MATERIALS
Želimir Veinović
Biljana Kovačević-Zelić
Predrag Kvasnička
Abstract
Permeability tests are one of the most often performed experiments in geotechnics. Conventional methods conducted by oedometer and triaxial apparatus have many disadvantages, the most significant being the test duration. As a consequence, errors in permeability measurements could occur. On the contrary, by applying modern flow-pump method, permeability measurements can be obtained much more rapidly. Moreover, the permeability/void ratio relation can be obtained by using adequate laboratory devices. This is particularly important for soft materials, since their permeability could vary within several orders of magnitude depending on the variation of void ratio. The article presents advantages and disadvantages of the flow-pump method performed in a modified triaxial cell and hydraulic oedometer, in comparison with conventional constant head and falling head methods. The specimens were prepared from the waste stone dust, which is the product of final dimension stone processing.
Keywords
coefficient of permeability; flow-pump test; hydraulic oedometer; triaxial cell
Hrčak ID:
13393
URI
Publication date:
4.12.2003.
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