Study of the Limiting Shear Stress of Pyrophyllite – Clay Component – Water Composition at Elevated Temperature


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Abstract

A sharp reduction in the ultimate shear stress in the range of 20 – 80°C is observed during preparation of specimens of a clay component without thinners that facilitates development of cracks and defects. Use of pyrophyllite in ceramic mixes during specimen preparation provides a gradual reduction in the ultimate shear stress Pm in the range of 20 – 80°C. It is shown that in order to improve specimen drying properties a pyrophyllite – clay – water composition is more homogeneous than a clay – water composition Analysis of specimen Pm under hot forming conditions shows that the relationship Pm = f(t) is not as important as the relationship Pm = f(W,t), where t is temperature, and W is humidity.

About the authors

V. Z. Abdrakhimov

FGBOU VO Samara State Economic University

Author for correspondence.
Email: 3375892@mail.ru
Russian Federation, Samara

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