陶磁器素地の Pfefferkorn 法および Atterberg 法による可塑性の評価

概要

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Plasticity of ceramic bodies, mixture of Gairome, Kibushi or Murakami clay and Kamado feldspar, were examined by Pfefferkorn and Atterberg method. The results were, (1) In any clay-feldspar systems. Atterberg plastic limit showed minimum value at the clay content of 40%. Liquid limit and Pfefferkorn plasticity index were increased with the increase of clay content. These behavior were explained approximately by the concept of binary-particle packing. (2) In this experiment, the Pfefferkorn plasticity indices (PV) were situated approximately at the mean values of Atterberg liquid limit (W_L') and plastic limit (Wp'), which were measured on the basis of wet weight instead of usual values based on dry weight. By assuming the generality of this relation (PV= (W_L'+Wp')/2), empirical equations (W_L'= (-B-7.88)/A, Wp'= (-B+32.12)/A) were presented to derive Atterberg liquid limit and plastic limit from the data by Pfefferkorn method. (3) According to the above relation between Pfefferkorn plasticity index and Atterberg limits. Bowmaker's plasticity factor was qualitatively related to the plasticity chart.
日本粘土学会の論文
1981-06-30