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Frost damage of early-age concrete is particularly harmful for the concrete mechanical resistance because the ice volume expansion causes micro-cracks in the concrete structures, and as a consequence it lowers the compressive strength of concrete. [4]
The use of Zemdrain CPF on the resistance to chloride penetration of concretes exposed to salt spray condition in hot climates; Technical Report No. 1303/92/6335, Taywood Engineering Ltd, R&D Division, September, 1992,(unpublished). Price, W.F. The effect of Zemdrain Controlled Permeability Formwork on the frost resistance of concrete.
The first expanded polystyrene ICF Wall forms were developed in the late 1960s with the expiration of the original patent and the advent of modern foam plastics by BASF. [citation needed] 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 ...
Rastra is a registered tradename for a particular insulating concrete form (ICF) construction system, Rastra created the name Insulating COMPOUND Concrete Form (ICCF), used to make walls for buildings. It is one of the earliest such products, first patented in 1965 in Austria.
Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels, floors, roofs, and piles.
Concrete, like most consolidated hard rocks, is a material very resistant to compression but which cannot withstand tension, especially internal tensions. Its tensile strength is about 10 times lower than its compressive strength.
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Improved water resistance of various building materials - water remains on the surface in the form of droplets and does not penetrate the material; Increases frost resistance and improves thermal insulation materials; Does not prevent air exchange – the construction outputs pair outside and does not accumulate moisture;
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