At first glance, preparing a concrete mixture is not difficult, however, this is not so. But with the proper approach, it can do any. The most important thing in the concrete mixture is the lack of lumps. To prevent their formation, you need to knead the sand with cement, dilute this mixture with water to the desired consistency, and only then add crushed stone or gravel.
Classes are kneaded manually or using a technique. To date, there is a huge number of concrete mixers of various designs and sizes on sale. If you cook concrete are required for one work, then the manual method of kneads is suitable here. He, of course, is much harder than mechanical, but for that, the savings in the funds will be very noticeable.
For a concrete mixture, you need to carefully choose all the components. Sand must be taken sifted – without clay lumps. Cement should be chosen from well -known manufacturers. It should be at least 400 brand. Crushed stone is taken washed – without any pollution, since all kinds of extraneous formations significantly reduce the quality of concrete. Granite crushed stone has high strength, but it is the most expensive. In particular cases for small buildings, crushed stone from limestone is ideal. It is relatively cheap and quite practical. Use crushed stone price for it is quite acceptable and lower than for other fillers.
In the end, it should be added that the most popular proportions for the preparation of concrete mix are the following weights: 1 part of cement, 2 parts of sand, 4 parts of gravel and 1.5 parts of water.