Ready-mixed concrete, it is ready-mixed concrete - rolling stock of four major components, knead in a certain proportion: cement, gravel, sand, water. A similar mixture, but without the use of gravel, called grout, or sand concrete, though in the sand concrete is applied over a large sand fraction (module size). The weight ratio of components for the preparation of concrete mix about as follows: Cement -1 part Rubble 4 parts, Sand - 2 parts water - 1 / 2 parts. For example: cement - 330 kg., Rubble - 1250 kg., Sand - 600 kg., Water - 180 liters. Naturally, these figures are approximate and in fact depend on many factors such as: the required grade of concrete, cement brand, the characteristics of crushed stone and sand, the use of plasticizers other additives, etc. etc.
For example: when using the M-400 cement, concrete with such a composition will mark M-250. When the cement M-500, a brand of concrete will be the m-350. Figures are provisional! In the production of concrete batching plant, counted dozens of parameters and characteristics.

Время на сервере: 09.02.2010 04:39:59

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