The chemical compositions of ground BA are shown in Table 2. Its major component was 55.0% of SiO2, and the total amount of SiO2, Al2O3, and Fe2O3 was 64.2%, while the amounts of LOI and SO3 were 19.6% and 2.2%, respectively. It was noted that the LOI of the ground BA was higher than the limited value specified by ASTM: C618 for a class N pozzolan. Results from previous researches [11–14], however, suggested that ground BA had a highly pozzolanic composition and could be used as a cement replacement in mortar or concrete despite its LOI being higher than 10%.