Мой способ и пропорции замеса бетона своими руками марки М300

Proportions of concrete preparation When used for the preparation of concrete mortar of cement grades M400 and M500, the proportions of crushed stone, cement and sand will be as follows. My concrete mixer https://goo.gl/GC9T6i Concrete, brand Proportions of cement M400 (C), sand (P), gravel (Щ), kg - Ц: П: Щ Proportion of cement M500 (C), sand (P), gravel (Щ), kg - Ц: П: Щ The amount of concrete obtained from 10 l of cement grade M400, l The amount of concrete obtained from 10 l of cement brand M500, l M100 1: 4.6: 7.0 1: 5.8: 8.1 78 90 M150 1: 3.5: 5.7 1: 4.5: 6.6 78 73 M200 1: 2.8: 4.8 1: 3.5: 5.6 54 62 M250 1: 2.1: 3.9 1: 2.6: 4.5 43 50 M300 1: 1.9: 3.7 1: 2.4: 4.3 41 47 M400 1: 1.2: 2.7 1: 1.6: 3.2 31 36 M450 1: 1.1: 2.5 1: 1.4: 2.9 29 32 After the amount of crushed stone, sand, cement and water has become known and prepared, the mixture should be prepared. To do this, add a small amount of water to the concrete mixer, after which we pour cement, mix, add sand, mix again, achieving uniformity of mass without lumps. And only now you can add crushed stone and the remaining amount of water. The mixture is immediately used for construction work. Ripening concrete and gaining proper strength Traditionally, all work with concrete is carried out in the warm season at plus air temperatures. In this case, the water reacts with cement and the composition solidifies qualitatively. When pouring concrete in cold weather, water can turn into ice, which will cause the bud to lose strength and its destruction from the inside. Concrete is "grabbed" within 12 hours, hardens within the first week, after two weeks, concrete gains almost 80% of its strength, and becomes fully operational only after a month (assuming an ambient temperature of about 20 ° C). If you used special types of quick-hardening concrete for pouring, the term of "maturing" may be shorter.