Give and explain the Kelvin law.
The pressure is related to the radious of curvature of a liquid.
Why does the drying process need to be slow and uniform?
Because it is accompanied by large volume shrinkage
What is the Bigot point (critical moisture content)
when DPS=1 and the solid particles are in contact and the moisture is in the intergranular porosity
there is no further volume reduction
What are the effects of increased moisture content on the mechanical behaviour?
higher plasticity and lower defects
What are the stages of clay firing?
water removal
decomposition of the constituent
reaction binding
formation of a new chemical product which joins the phases
What is fire clay?
quartz+kaolinite(Al5Si2O2(OH)4)
What is ball clay?
Quartz+calcite(CaCO3)
Last changed6 months ago
