Reliability Prediction of Alkali-activated Mortar during Flexural Loading by Weibull Analysis

Abstract

Abstract This paper focuses on using Weibull analysis to predict various mortars' robustness based on the fracture process analysis through the flexural test which was recorded by the sensor of Acoustic Emission. Weibull distribution is used to clarify the reliability and robustness of cement by mortar characterization made from fly ash (F), ground granulated blast-furnace slag (GGBFS or G), and micro-silica (M) alkali activation compared with Ordinary Portland Cement (OPC) Mortars. This mortar production aims to characterize and compare alkali-activated materials (AAMs) properties with the cement type commonly used, OPC. AAMs are an alternative to Portland cement, that can decrease the amount of CO2 emission. The fracture process under flexural loading of AAMs was made from 4 combinations of F/G/M activated by the alkaline solution. Four variations are AAM-IV, AAM-V, AAM-VI, AAM-VII, and OPC as a control. Weibull analysis showed that AAMs were more robust than OPC mortar and possessed minor fractures compared to OPC mortar.