ABSTRACT
Recently, to maintain the durability of the infrastructure, the pozzolan materials are used in the concrete mixture in each country. However, with the different properties of the materials, the hardened concrete properties become differ. Among the Southeast Asia countries, fly ash is the mostly used pozzolan in this area. However, the proper guideline in using fly ash across the country are limited. Thus, a further experiment about fly ash from different sources is necessary. In this study, fly ash from Myanmar, Thailand and Indonesia were used as the pozzolan in the mix proportions. Each type of fly ash was used to replace the OPC in a percentage of 15% with w/b 0.54. After curing 7, 28 and 91 days, mortar’s compressive strength, ability to resist chloride penetration, following ASTM standard, were evaluated. Since the chemical composition of each country’s fly ash is slightly different, the chemical reaction with cement is expected to be slightly different. Thus, the mechanical properties of the mortar are differed.
