INVESTIGATION ON CONCRETES AND STEELS USED AT COAL MINING STATION "SHIME" AS INDUSTRIAL HERITAGE(Materials and Construction)

Abstract

Concretes and steels used at Coal mining station "Shime" in Fukuoka prefecture as industrial heritage were investigated. On footing, river gravel of granite were used. Most concrete were not reinforced, and maximum size of their coarse aggregates were 15 to 100mm. Sometimes crushed brick or coal slag was used. Most fine aggregates were river sand. Compressive strength of many concretes were not high, but about 40N/mm^2 of strength was seen on concrete basement for machine. Steel bar seemed to be made on the open hearth furnace of Yahata.