Analysis of the properties of lightweight concrete with the technogenic waste material

Abstract

During the production of higher density lightweight concretes filler aggregates can be used instead of the part of thebinding material. One type of filler aggregates is active filler aggregates that change the course of the reactions ofhydration. The technogenic waste material – catalyst utilised in the reactor of catalytic cracking can be used as filleraggregate. Lightweight concrete (expanded – clay lightweight concrete), with the filler aggregates – technogenic wastematerials is analysed in the research. During the analysis, the influence of the filler aggregate on the properties ofconcrete mixture was identified, thermographic analysis of exothermic effect was carried out, strength, structuralproperties were analysed, X-ray structural analysis was carried out. Additionally, the analysis of crush resistance of thecoarse aggregate is carried out and described during the research. Article covers the information on the changes of theinvestigated properties in relation to the amount of the filler aggregates.

Darbe pateikti tyrimo rezultatai rodo, kad katalizatoriaus atliekos priedas sumažina egzotermijos temperatūros maksimumo atsiradimo laiką. Kristalizuojantis reakcijos produktams, susidaro ilitas ir etringitas. Fizikinių ir mechaninių savybių rezultatai parodė, kad, įdėjus 15 % katalizatoriaus priedo, keitėsi betono stiprumo charakteristikos (gniuždomasis stipris po 28 kietėjimo parų 32 % didesnis nei betono su 30 % katalizatoriaus priedo). Keramzitbetonio gniuždomasis stipris po 28 kietėjimo parų 7 % mažesnis nei betono su 15 % katalizatoriaus priedo. Optimalus katalizatoriaus kiekis betono sudėtyje siekia 15 %.