In order to get a solid foundation for the building of a country or city, you need to make the right foundation.Concrete strength is sufficient only when all the proportions of a solution for the foundation will be calculated correctly.
proportions of components depending on the operating conditions and materials
Depending on what kind of cement to prepare a solution to be used, changing the ratio of aggregates - sand, crushed stone or gravel.The number of components is different and depending on the quality of the soil - dry or wet it.
In manual kneading weight components often measure out buckets.The standard 10-liter bucket holds about 15 kg of sand, 14 kg of cement and about 16 kg of rubble.The total amount of the original volume of dry mixture after mixing decreases by almost a third, it must be considered.
Do not change the ratio of the components in the slurry for each new batch.Suffice it to produce a solution for the foundation (proportions remain the same!) As well as the previous times.Usually enjoy the recommended standard values.1: 4: 6.5 are considered standard for cement M500, where 1 - part cement, 4 - sand, 6.5 - rubble.The ratio of sand and gravel using cement M400 - 1: 3.5: 6.
In dry soil to reduce the cost of works can be used as loose filler secondary rubble - so called brick and pieces of old concrete.Nekonditsiyu remaining in the manufacture of concrete, bricks or pieces brought to the desired size using the usual crushers or sledgehammer.
proportions solution for the foundation to be installed in the soil moisture, other.Cement M500 - 1: 3.4: 5.8 for M400 - 1: 3: 5.5, respectively.
Before the batch of concrete bulk materials is desirable to prepare specifically: select from large pieces of rubble, debris, rinse with a hose if a lot of clay impurities.Sand sieve to prevent any foreign inclusions.It is possible as a plasticizer, increases the ductility of the solution, the use of liquid soap or shampoo, and can buy a special additive.
proportions solution for the foundations do not always correspond to the standard values.As the kneading may sometimes be required to enter an additional one or the other component.You must navigate to the consistency of the solution.Poured out of the container it should, like thick cream.
Engaged cement mixture after work on the installation of formwork and reinforcement completed, otherwise it will have time to thicken.Also it is necessary to calculate separately how much of the solution to mix at a time.Unused solution is only suitable as a secondary rubble.
With increasing grade of cement, which is made of cement mortar, the proportions for the foundation of the other components are reduced.It is believed that the cement brand M400 below to work on the creation of the foundation to use is impractical.
proportions solution for the foundations do not change depending on the time of year.But if the work carried out with a solution at low temperatures, the mixture is added to the cement antifreeze.When calculating how much of the additive should be introduced into the slurry, taken into account the amount of cement and temperature conditions, during which the concrete works are carried out.
