National Institute for Land and Infrastructure Management investigates actual situation of main construction materials, such as natural gravel, recycled gravel, cement, asphalt, fresh concrete, combined asphalt. The institute grasps amount of supply, length of transport, amount of demand and etc. through documental survey and hearing. This paper shows progress report of this survey.
This paper also shows direction of development of Inventory Database of main construction materials. The Institute estimates this database will help introduction of LCA in infrastructure development.
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