On the strength characteristics of concrete, the buyer pays attention first. It is believed that the stronger, the better and more durable. However, this is a somewhat simplified approach, since it is necessary to take into account both the appropriateness of the application and, consequently, the lower construction costs. Therefore, you should become more familiar with this "indicator".
The brand determines the strength of the final "product"( kg / cm2), that is, after the final hardening of the concrete solution. And it means "on compression", since there is also the concept of "expansion".The figures in the product name after the letter "M" indicate the content and quality of the cement contained in the product.
Usage according to the brand
M100 - 150
When carrying out the preparatory measures. Arrangement of "pillows", screeds, fastening of parts of the base( for example, pouring of claydite layer), some decorative fences and the like. It can also be used to prepare the bases for light structures( gazebos, pillar supports).Such a solution( with filler of fine fractions) in everyday life is used to seal gaps, joints.
Price - ranging from 2 750 to 3 100 rub / m3 .
M200 - 250
In private housing construction it is used quite widely, first of all, because of the optimal combination of "quality - price".Such concrete is suitable for the construction of various types of foundations, blind lands, stairs. It is used for the equipment of septic tanks, drainage systems, fences, garden paths and much more. Of the "250" sometimes erected and walls, but not subjected to significant stress( partitions).
Price for "200" - from 2 750 to 3 100 rub / m3 , for "250" - from 3250 to 3 550 rub / m3 .
M300
It is considered the leader in the field of retail sales, as it is used almost everywhere in individual construction. Unlike previous brands, it can be used for pouring floors, building monolithic walls.
The price - from 4 100 rub / m3 .
M350
In the private sector - with the arrangement of pools, fountains, foundations. But its use is limited by a higher cost.
For 1 m3 - from 4 700 rubles .
All higher grades of concrete have mainly industrial applications.
What to take into account
- With more "durable" concrete solutions, it is more difficult to work, since setting is much faster.
- Less durable solidifies more slowly. Therefore, most likely, to achieve the uniformity of the structure will have to worry about additional measures. For example, vibrocompression. Naturally, the terms of the works, and labor costs will increase.
- One and the same strength can be achieved in different ways. Use more sand and less cement, but more "high" brand. Or vice versa, buy cheap cement( brand below), but increase its share in the total volume of the mixture.
- Presence of plasticizer additives( described here).Some of them increase the strength of cured concrete.
