Calculation of concrete solution


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Grade or class is the main indicator of concrete mix quality that is usually the focus of attention for those purchasing concrete. The other indicators, such as: Frost resistance, mobility, waterproofing capacity are second important topics here. Initially, however, the choice is made in favour of the grade or class.  Generally, the concrete strength is rather variable feature that gains throughout the whole curing process. 


For example: Concrete strength gained in three days and in a week will be different (up to 70% of the projected strength, under suitable weather conditions). In a standard period, 28 days of normal curing, the projected (calculated) strength is generated. And in six months it gets even higher. Basically, concrete curing and the process of gaining strength go on for many years. 

Concrete strength, grade, class. Test methods. Test samples.



cement grade M 200 SolutionM 200 M 250 M 300 M 350 M 400
B 15B 15 B 20 B 22.5 B 25 B 30
Sand, kg 370230216200160135
Chippings, kg320284240210205
Water, l.756662564643
SP-1, kg

* Actual material consumption for 1 m3 of concrete mix including water absorption of inert materials and concrete cube strength.

M 200 Solution / B 15 - it is a mortar used in construction during plastering or masonry work.

M 200 / B 15 - Manufacturing foundations, floors, screeds, concreting roads, raft and piled foundations, stairways.

M 250 / B 20 - Monolithic foundations.

M 300 / B 22.5 - Monolithic foundations, fences, walls, stairways, floor slabs. The most demanded concrete grade.

M 350 / B 25 - Floor slabs, columns, monolithic walls, pool decks, beams and crossbars.

M 400 / B 30 - Bridge conduits, columns, crossbars, bank vaults and other structures with special requirements.

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