A novel cost-effective method for self-estimation of crack occur time by piezoelectric measurement of glass powder-modified cementitious mortar

Abstract

This study investigated the usability of ground glass waste powders (GP) in cementitious mortars. For this purpose, 4 cm × 4 cm x 16 cm mortars were produced with 0%, 5%, 10%, and 20% GP additives by weight (instead of cement). The mortars’ hydration temperature and moisture (%) values were recorded during one day (for every minute), and various comparisons were made. To investigate the effects of alternating current (AC) on the internal temperature, physical, mechanical features, and microstructure of mortars, 20V AC was applied to fresh mortars for 24 h. It was found that the optimum ratio of GP in both current-applied and non-current-applied mortars was 5%. It was observed that the 28-day compressive strengths of the mortars decreased by 4.81%, 19.97%, 30.89%, and 40.10%, respectively, compared to the reference mortar when 5%, 10%, 15%, and 20% GP were added. Another result obtained in the study is that crack formation level can be predicted by measuring vibration in mortars. Thus, this study is critical especially in predicting the damage stages of the structures due to earthquakes.