Possibility of using bottom ash in precast concrete products

Kako bi se ocijenila kvaliteta pepela s dna peći i utvrdila mogućnost njegove upotrebe u kompozitnim materijalima, provedeno je ispitivanje njegovih kemijskih, fizikalnih i mehaničkih svojstava iz dvije termoelektrane.Utvrđeno je da uzorci pepela s dna peći iz obje elektrane pokazuju dobra svojstva koja upućuju na mogućnost njihove praktične primjene te da ispunjavaju većinu kriterija propisanih za leteći pepeo. Ispitani su uzorci s 4 %, 8 %, 12 % i 16 % zamjene sitnog agregata pepelom. Rezultati su zadovoljili kriterije propisa za beton, što opravdava upotrebom pepela s dna peći u građevinskoj industriji.Chemical, physical and mechanical properties of bottom ash from two thermal power plants were analysed in order to evaluate the quality of bottom ash and to determine the possibility of its use in composite materials. It was found that the bottom ash samples from both power plants show good properties enabling their practical use, and that they also meet most of the criteria specified for fly ash. Samples in which 4, 8, 12 and 16% of fine aggregate was replaced with bottom ash were tested. The results meet criteria of applicable regulations for concrete, which justifies the use of bottom ash in construction industry