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Rastra
Rastra is a tradename for a particular insulating concrete form (ICF) used to make walls for buildings. It is one of the earliest such products, in production since 1972, and is composed of concrete and thastyron. Thastyron is a mixture of plastic foam and binder that is composed of eighty-five percent recycled post consumer polystyrene waste that are molded into blocks. The main components of rastra are cement, water and expanded polystyrene. ==Production== Rastra is sustainable in its production because no energy is used in the curing process, and only one to three kilowatt hour (kWh) is required to make each block. After the blocks are trimmed to exact size, the remaining debris is recycled to create new blocks. No byproducts are released in the production process that are considered a burden to the environment.〔(Rastra Insulated Concrete Form System (ICF) Construction Building Blocks For Houses & Commercial Buildings )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Rastra」の詳細全文を読む
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