Effect of Sodium Carbonate Addition on the Property and Formation of Terracotta Panel

摘要

The extrusion property of the paste has a significant effect on the production of terracotta panel. The influence of sodium carbonate addition on the exchange ability of ions, thickened hydrate film with the sodium cations and the plasticity of mud pie was investigated. When the addition of sodium carbonate is 0.015%wt, the plasticity and yield strength of paste are excellent. The best performance specimen with 0.015% sodium carbonate has a few fluctuation of effective strain and the ratio of the maximum with the minimum velocity of paste is the least while extruding from meatus of discharging.