2018 : THE USE OF ACOUSTIC EMISSION FOR FRACTURE PROCESS ON ALKALI-ACTIVATED MORTAR FROM INDONESIAN HIGH CALCIUM FLY ASH DURING THE FLEXURAL TEST
Ridho Bayuaji ST., MT., Ph.D.
Dr.Eng. Yuyun Tajunnisa ST., MT.
Portland cement production has responsible for carbon dioxide emission. Alkali-activated materials (AAM) can be considered as solution to preserve environment and produce more durable concrete. AAM involve a chemical reaction of alumino-silicate minerals under alkaline condition. The source precursors are from industrial by-products such as fly ash. Previous study investigated low calcium fly ash (class F or type II) of the Japanese ash for alkali-activated mortar. The first year of work aims to investigate high calcium fly ash for alkali-activated mortar and analyzes the differences of both: previous study was using low calcium fly ash and this year is using high calcium fly ash. The second year, the study will engage Weibull distribution analysis to be applied to Acoustic Emission (AE) hits AAM specimen from high calcium fly ash for evaluation under flexural test.
Mechanical properties of high calcium fly ash based AAM are determined using compressive strength, flexure strength, ultrasonic pulse velocity test, density test, porosity test, Scanning Electron Microscopy (SEM) are conducted at ITS. Acoustic Emission (AE) will be conducted in Kumamoto University. In the longer term, this study is expected to answer the environmental problems associated with concrete corrosion.