Obvious porosity rate online calculator

Also known as the open porosity. The percentage of open pores in the refractory product as a percentage
of the total volume of the article. Except as indicated, the porosity of the Chinese refractory industry
generally refers to the apparent porosity. The apparent porosity is an important indicator for evaluating
the quality of refractory raw materials or products. It not only reflects the compactness of refractories,
but also indicates whether the manufacturing process is reasonable. In addition to lightweight refractory
products, low porosity raw materials or articles are beneficial for improving product quality, increasing
mechanical strength of the article, reducing surface area in contact with the slag, and extending service life.

Appearance porosity formula:

Apparent porosity = ( s - w / s - i ) * 100

s - weight of piece soaked

w - weight of dry piece

i - weight of the piece soaked and immersed.