A comparison between the strengths of the concrete cube and cylinder is necessary to get an idea of the characteristic strengths to be used in the different standards. For example, Eurocode uses the characteristic strength of the cylinder to represent the strength of concrete.
However, the British standard mainly uses matrix thickness as the characteristic strength to represent concrete in design formulas.
Therefore, it is important to know the respective resistance classes and structural relationships.
It appears that there is no linear relationship between cube thickness and cylinder thickness. However, it can sometimes be seen that some designers use the factor 0.8-0.9 to obtain the relevant cylinder thickness for a given hub thickness.
Now we don't need to worry about any factor to calculate the relationship with the characteristic voltage. Eurocode 2 provides a relationship to take into account when designing to this standard.
The values extracted from Table 3.1 of Eurocode 2 are presented below.
| Cylinder characteristic force | Characteristic strength of data |
| 12 | 15 |
| 16 | 20 |
| 20 | 25 |
| 25 | 30 |
| 30 | 37 |
| 35 | 45 |
| 40 | 50 |
| 45 | 55 |
| 50 | 60 |
| 55 | 67 |
| 60 | 75 |
| 70 | 85 |
| 80 | 95 |
| 90 | 105 |
The values mainly apply to Eurocode. However, if these values are used for calculations based on other standards, the necessary checks must be carried out.
Therefore, an idea or comparison of cube thickness and cylinder thickness helps the designer to understand the designs well.
