Influence of used waste cathode ray tube glass on alkali silicate reaction and mechanical properties of mortar mixtures

Jelena Bijeljic, Nenad Ristić, Zoran Grdić, Gordana Topličić-Ćurčić, Nenad Stojković

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Rapid transition of electronic device manufacturing industry has led towards the increase of glass waste quantities, which are still being speculated. This resulted in increasing research on the use of waste glass in many different industries. In this study, the impact of using grounded waste cathode ray tube (CRT) glass as aggregate replacement (AR) on the alkali-silica reaction (ASR), mechanical properties and structure and microscopy of mortar were examined and reported. Crushed waste CRT aggregate was used to replace natural limestone aggregate of 0, 25, 50, 75 and 100% in mortar bars. ASR expansion values of mortar with added waste glass were investigated and tested for observation period according to Ultra-accelerated mortar-bar test. The results showed that the increase of AR percentage resulted in higher susceptibility to ASR. Mechanical properties and microscopy of mortar mixtures showed the potential of using waste CRT glass, due to the small difference between tested mixtures.


mortar, cathode ray tube glass, alkali-silicate reaction, mechanical properties, microscopy, aggregate replacement

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