Investigation of effect of sepiolite on the properties of autoclaved aerated concrete

Abstract

In the work the effect of sepiolite addition, replacing quartz sand in the autoclaved cellular concrete (ACC), on the properties of this cement composite was examined. It was found that sepiolite content higher than 10% is decreasing compressive strength of ACC and increasing its moisture content, already at addition of 5%. Also dry density is decreasing quickly up to 15% and from 20% to 25% only slowly. However, thermal conductivity is decreasing substantially from 0.105 to 0.088 for 10% sepiolite addition. 10% of sepiolite is the best level of replacement of quartz sand in ACC.