Measurement of Workability of Ceramic Bodies for Plastic Molding Processes*

Abstract

37CRZA, indicated that the hot-load strengths of both compositions were superior t o those of commercial grades of basic refractories. The CCA brick sheared at 1670°C., whereas the CRZAbrick sheared a t 154OOC.ber of melts to which the other refractory linings were exposed before failure occurred.(9) The high resistance of the two laboratory refractory compositions, CCA and CRZA, to basic open-(8) The lift: tests on separate linings of brick in the hearth-slag attack, together with their good Ibadbearing properties and expansion characteristics, indicate favorable possibilities for use in basic open-hearth furnaces. The CCA refractory might replace the silica brick crowns used in most basic open-hearth furnaces. small Detroit rocking furnace against the corrosive action of molten rock phosphate showed that the two modified Iaboratory compositions, ccA and cRZA, were superior to those of the commercial superduty fire-TENNESSED VALLEY AUTHORITY clay brick and of the chrome-magnesia brick l&ings. The CCA lining withstood three to five times the num-WILSON DAM, ALABAMA ABSTRACTThe plastic working properties of a number of clays and bodies were measured with a modified Endell body tester. The apparatus shows that various bodies may be adjusted to a similar consistency for a given molding process but differ in their tendency to crack on being deformed. It is possible to determine the extent to which plastic properties are affected by differences in raw materials, methods of body preparation, water content, aging, and deairing.

Interpreting the Pottery Record from Geometric and Archaic Sanctuaries in the Northwestern Peloponnese

“…Norton Norton 1974, 78 f.;Moore 1965;Astbury et al 1966;Singer -Singer 1979, 299-302. 33 Henry 1943;Carman 1949;Marshall 1955. 34 Norton 1938Norton 1974, 78 f.;Moore 1965;Astbury et al 1966;Singer -Singer 1979, 299-302.…”

Assessment of clayey raw material suitability for ceramic production in Northern Peloponnese

“…In the ceramic manufacturing the measurement and control of the plasticity of the clay are necessary for the optimization of the processing conditions. The plasticity can be influenced either by the clay itself or the molding process (Henry, 1943;Carman, 1949;Marshall, 1955). As far concerns the clay, factors such as moisture content, mineralogical composition, grain size, type of exchangeable cations, the presence of salts and organic material, can affect the clay plasticity (Talwalkar and Parmelee, 1927;Wilson, 1936;Whitaker, 1939;Lawrence, 1958;West and Lawrence, 1959;Barna, 1967;Onoda, 1996;Schmitz et al, 2004;Bergaya et al, 2006).…”