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Plasticity and combined refractory brick

The material under the action of external force deformation and no crack, the external force is removed, the deformed configuration and performance remains not recovered called plasticity. Combined with the clay plasticity is an important molding process index. The specific surface area and water properties, related to plasticity and solid particles such as clay adsorption of water, add water, due to the adsorption of a film of water in a large amount of clay particle surface, so that the particles is easy to slip under the action of external force, and have binding force, so it has high plasticity.

Plasticity index method and plasticity index measurement of plasticity, plastic water is also useful to measure. Plasticity index refers to the pug are plastic state, the variation range of water content, and its value is equal to the liquid limit (liquid limit and plastic limit () the difference between the plastic limit). The liquid limit is Pug are plastic state of the upper limit of water content, when the moisture content more than the liquid limit of clay, a semi solid state. Liquid limit and plastic limit of the difference, expressed as a percentage is the plasticity index.