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Insulating concrete form : ウィキペディア英語版
Insulating concrete form

Insulating concrete form or insulated concrete form (ICF) is a system of formwork for reinforced concrete usually made with a rigid thermal insulation that stays in place as a permanent interior and exterior substrate for walls, floors, and roofs. The forms are interlocking modular units that are dry-stacked (without mortar) and filled with concrete. The units lock together somewhat like Lego bricks and create a form for the structural walls or floors of a building. ICF construction has become commonplace for both low rise commercial and high performance residential construction as more stringent energy efficiency and natural disaster resistant building codes are adopted. ICFs may be used with frost protected shallow foundations (FPSF).
==Development==
The ICF construction technique was first developed in Europe following World War II as an inexpensive and durable way to rebuild damaged structures. The first patent for an insulated stay-in-place formwork for concrete was registered in the early 1940s using recycled waste wood and cement as the insulating material. This patent was registered by August Schnell and Alex Bosshard in Switzerland. The first polystyrene ICF forms were developed in the late 1960s with the expiration of the original patent and the advent of modern foam plastics. Canadian contractor Werner Gregori filed the first patent for a foam concrete form in 1966 with a block "measuring 16 inches high by 48 inches long with a tongue-and-groove interlock, metal ties, and a waffle-grid core."
The adoption of ICF construction has steadily increased since the 1970s, though it was initially hampered by lack of awareness, building codes, and confusion caused by many different manufacturers selling slightly different ICF designs rather than focusing on industry standardization. ICF construction is now part of most building codes and accepted in most jurisdictions in the developed world.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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