The impact of aeration of concrete based on ceramic aggregate, exposed to high temperatures, on its strength parameters

The research is conducted on six, empirically designed concrete mixes, three of which are based on calcium aluminate cement and aeration equal to 0, 5 and 10%. In order to compare the results, three concrete mixes based on Portland cement, which possess precisely convergent aeration of mixes respectively amounting to 0, 5%, 10%, have been prepared. All the types of samples were made with the use of recycled sanitary ceramic aggregates, selected and crushed into two fractions of 0-4 mm and 4-8 mm. This special type of aggregate, as it has been proven by the previous works of authors Halicka and Zegardło (2011) [2], Ogrodnik et al. (2012) [3], Halicka et al. (2013) [4], Zegardło and Ogrodnik (2016) [5], showed very favorable features in the issues of thermal loads impact. The first group of samples is a base one. The second part was exposed only to annealing. The others were subjected to moisture, prior to annealing. Basic research was conducted for particular concrete samples. The compression and bending strengths were also determined.