Combined effects of industrial waste in cementitious composites production

It is generally accepted that pozzolan based binder can restrain aggregates reactivity, thus reducing ASR effects. Recently, a solid residue (named PR) resulting from porcelain stoneware tiles polishing sludge has been investigated as cement constituent. The new binder made up of 25 %wt PR + 75 %wt CEM I 52.5 R exhibits pozzolan behavior. It seemed thus interesting to evaluate the effect of PR based binder as an ASR inhibitor. Accordingly, this paper deals with mortar samples prepared by an ordinary pozzolan cement (CEM IV/A), a OPC (CEM I) and 25 %wt PR + 75 %wt CEM I 52.5 R mixed with normalised sand and different recycled glass types as 25% sand replacement. Mortar mechanical properties and expansion test, carried out according to ASTM C1260, are reported and discussed with the aim to investigate the combined effect of PR and post-consumer glass.