| you are: Classification of natural stone materials
Svezhedobytye limestones, dolomite, sandstones, tufy easily collapse from a frost because their time is filled ' by a mountain moisture ' and the factor of saturation of a time water is close to 1. After natural drying they appear cold-resistant enough and stronger. Возможно, вам покажется интересным рытье котлована стоимость в Подмосковье.
Water resistance. The factor of a softening of the stone applied to hydraulic engineering constructions and the bases, should be not less than 0,8, for external walls of buildings - not less than 0,6.
Istiraemost and deterioration. These properties of a natural stone material have great value at the device of road coverings, floors, ladders, etc. Melkokristallichesky materials at istiranii become too slippery, therefore for ladders, floors and road coverings it is necessary to apply medium-grained materials which at istiranii remain a bit rough. At vykrashivanii large grains in process istiranija in a stone hollows are formed.
Fire resistance depends on mineral structure of a stone. Some materials at the raised temperature decay (plaster at 100°С, limestone at 900°С), others (for example, a granite, porphyries) rastreskivajutsja at a fire owing to various thermal expansion of minerals making them.
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