brands m200, m300, m350 for a foundation at home - Review + Video

brands m200, m300, m350 for a foundation at home - Review + Video All buildings are located on the foundation. It is the most important element in the construction of a durable structure. The basis is different in material of manufacture and purpose. The article tells about the composition and proportions of concrete for the construction and manufacture of the foundation with your own hands for buildings. The proportions of materials for the preparation of a mixture per 1m3 are given for cooking at home in a concrete mixer or buckets.

Which tool to use. A step-by-step instruction on self-preparation of concrete mortar is given. Explains which materials are best to use in this process.

Concrete. Basic information

What determines the type of foundation?

The type of foundation depends on the design conditions and loads.

Basically, the foundations are made in compliance with the proportions of concrete.

  1. Strip foundation.
  2. Pile foundation.
  3. Monolithic slab.

There are also simplified options:

  • Brick foundation
  • Wooden heap.

Concrete composition

The main indicator for concrete foundations is the strength grade. It is determined in laboratory conditions under loads for a certain period of time. These indicators are designated by the letter M, and start from 100 to 600 in increments of 50 units.

brands m200, m300, m350 for a foundation at home - Review + Video The strength of concrete directly depends on the proportion of its constituent components:

  • Cement, M-400 and M-500 are used.
  • Crushed stone from granite fraction 20-40 or 40-70 for increased strength
  • Rubble stone with uneven edges.

    You can use fragments of concrete, brick, metal scraps

Attention! Smooth coarse gravel or concrete pellets are not suitable.

  • Quarry sand of medium fraction, river sand is not suitable due to the presence of silt inclusions.
  • Steel corrugated reinforcement.
  • Water.

The main grades of concrete

For foundations used; M-250, M-300, M-350, M-400.

On average, it takes at least 4 m 3 concrete to build a foundation.

For example, the composition of the mixture M-300 based on the calculation of obtaining 1 m 3 product:

The initial ones are taken from the calculation of 1 bag of cement M400 and the calculation of the number of filler elements according to formula 1: 1. 9: 3.7

  • Cement M400 by weight 400 kg.
  • Sand, sifted, 760 kg.

  • Crushed stone or quarry 1480 kg.
  • Water is added in portions, until a solution of the state of liquid sour cream is obtained.

To simplify calculations in the field, you can apply the weight of the material per bucket volume of 10 liters. for all components:

  • brands m200, m300, m350 for a foundation at home - Review + Video Cement 15 kg.
  • The weight of one bucket is 10 liters.

    with sand is 19 kg.

  • Crushed stone weighs 18 kg.

One load of a concrete mixer with a volume of 150 liters requires:

  • 3 buckets of cement or 45 kg.
  • 2 buckets of sand equal to 38 kg.
  • 9 buckets of rubble by weight equal to 162 kg.

  • Water is added to the consistency of a liquid paste.

The output will be 0.122 m 2 concrete mix from one batch. To obtain 1 m 3 concrete, 6 batches are required.

Concrete can be ordered with delivery, in a special mixer vehicle, directly from the factory.

But if the object is located remotely, the volume of the foundation is small, and the economic component will be higher than the production need, this product can be easily prepared independently. To do this, it is necessary to determine the brand of the mixture according to the reference book, regarding the required indicators of the future foundation.

Important! The foundation of a building is always constructed with a superior safety factor.

Making concrete

Necessary tools for production

  • shovels,
  • stretcher or building wheelbarrow,
  • buckets of 10 liters. ,
  • sand sieve,
  • concrete mixer.

The material is purchased in the amount required for the production of concrete according to the design calculation.

The facility requires a water and electricity supply to operate the equipment.

Step-by-step instructions for preparing concrete yourself

Process

For example! A mixer with a volume of 150 liters is used as the main one

  1. 3 buckets of cement are poured into the mixer tank and the device is turned on,
  2. with continuous rotation, crushed stone is added in the amount of 9 buckets,
  3. then sand is poured in the volume of two buckets, and for some time the mixture is kneaded in dry form until a homogeneous composition is obtained,

Important! The sand must first be sieved to separate debris.

  1. the final step is adding water in portions, about 4 buckets, until a semi-liquid consistency is obtained,
  2. 5-7 minutes are given for mixing ready-made concrete to activate chemical processes,
  3. The ready-mixed concrete is placed in a wheelbarrow or stretcher and transported to the site of use.

Cycles

The process of making the mixture is repeated until the required amount of solution is obtained.

After pouring the material into the foundation formwork, it is imperative to vibrate the concrete to remove air bubbles and better penetrate it to the reinforcement. This can be done with a pole manually or with a special electric vibration apparatus.

Conclusion

The process of preparing concrete is laborious and takes a certain amount of time. If it becomes necessary to postpone the work to the next day, then it is necessary to leave the unfinished part of the foundation at an angle and with the outgoing ends of the reinforcement.

This position will provide a more reliable adhesion of fresh concrete prepared the next day, with the already hardened previous part.

At the end of all work on pouring concrete, a period of at least 7 days is given for the complete setting of the solution. It is necessary to irrigate the entire foundation with water daily.This will prevent uneven drying of the layers of the cement mixture and the occurrence of cracks.

( 4 marks, average 2.75 of 5 )

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