| you are: Structurally-mechanical properties of the cement test
However the specific surface of the gel of hydrosilicate considerably decreases at drying that is visible from the skilled data. The cement stone made of a solution with VTS=0,4, had at the age of 514 sut (at hydration of 86% of cement) a specific surface (м2г): 708 - at 100%-s', 330 - at 50%-s' and 189 - at 12%-s' relative humidity. ðåìîíò ìîíèòîðà íîóòáóêà ðàçíûå îòçûâû è ðåìîíò ìîíèòîðà íîóòáóêà ñàéò . integration of particles of new growths at strong drying not only reduces gluing ability gidratirovannogo cement, but also raises its fragility. All these researches speak about necessity of care of the concrete preventing its early drying, and also about creation corresponding vlazhnostnyh conditions at thermal processing of ferro-concrete designs.
V.N.Jung has entered representation about a cement stone as the microconcrete consisting from gelevyh and crystal products of hydration of cement and numerous inclusions in the form of negidratirovan th grains klinkera. Great bulk of new growths at interaction of cement with water turns out in a kind gelevidnoj the weight consisting in basic from the submicrocrystalline parts of hydrosilicate of calcium. The gelepodobnaja weight is penetrated by rather large crystals of hydrate okisi calcium. such original ' combined ' the structure predetermines the specific properties of a cement stone sharply different from properties of other materials - metals, glass, a granite, etc. For example, with presence gelevoj a component it is connected usadka at tverdenii on air and swelling in water, features of work under loading and other properties.
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