Rules for the selection of the composition of the silicate concrete mixture
The conditions for steaming of products have a great influence – in forms or in a reinforced state. Therefore, the selection of the composition of silicate concrete must be carried out for a certain mode of autoclave processing, in particular, for a certain pressure of steam and under certain conditions for steaming.
The mobility of the concrete mixture is prescribed based on the method of its compaction. For silicat concrete mixtures formed without special compaction, the precipitate of the cone can be 12-16 cm, t. e. Cast concrete is used. But such mixtures cannot be used to obtain high -strength silicate concrete. When spacing vibration on the vibration ground, plastic and semi -rigid mixtures are used with a lot of laying up to 80 seconds. With a seal of vibration with a load, power rental or vibration interpretation, hard concrete mixtures with a stiffness indicator of 80 seconds or more can be used. The use of very hard mixtures (stiffness indicator 200 seconds or more) is inappropriate. With each of the methods of compaction, especially when laying hard mixtures, it is advisable to establish optimal mobility (rigidity), or (one and the same) with special trial kneaders, which provides its most dense styling with this compaction method and, as a result, the highest strength of silicate concrete with the smallest consumption of cement.