Assessment of waste packaging glass bottles as supplementary cementitious materials

Adhesion of residual packed materials to waste glass bottles, as well as particle size, pozzolanic activity and alkali-silica reaction (ASR) of waste glass powder, are important indexes to choose waste glass bottles to be utilized as supplementary cementitious materials (SCMs). Five different sources of waste glass bottles were selected, characterized and tested to be used as supplementary cementitious materials. The pozzolanic behavior of waste glass powders was examined by different methods. The compressive strength development of mortars containing uncolored, green or brown soda-lime ground glass types exhibited good pozzolanic behavior confirmed by a chemical test. The formation of calcium silicate hydrate (CSH) was demonstrated by XRD and TGA-DTA analysis. The alkali-silica reaction was monitored for the five glass powders. The results of pozzolanic activity, as well as the expansion results due to ASR, show that the powder of uncolored, green and brown soda-lime glass types is acceptable to be used as SCMs and the ions responsible for the color have no effect on the performance. (C) 2018 Elsevier Ltd. All rights reserved.