Abstract
Hardened pieces maybe cementitious materials collected from Nobiru-Port related structures built in the early Meiji era were evaluated by chemical methods. They were verified as mortar prepared with cement and sand. Unhydrated cement particles were observed in them by electron microscope. Size of cement particles, chemical composition of cement, and kind, quantity and state of clinker mineral coincided with the record on the cement manufactured in the early Meiji era. These results suggested that cement manufactured in the early Meiji era were used in the construction of Nobiru port.
