Influence of the firing process on water absorption and compressive strength in ceramic samples

Abstract

It is presents the evaluation of water absorption and compressive and flexural strength in perforated blocks manufactured in a Hoffman-type kiln of brickworks Ocaña, Colombia. Combustion gases are reused in the firing process and the samples are directly exposed to fire. Standardized non-destructive quality control tests such as dimensional, initial absorption rate and 24-hour immersion, and destructive tests such as compressive strength and modulus of rupture were performed. The firing process with higher fire exposure on the samples showed values of compressive and flexural strength and water absorption percentage according to current regulations. The samples comply with the values established in the standard and allow their use as non-structural masonry products for interior or exterior use.