Resistência Concreto 28 dias
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
fcd = fck/γ
About this calculator
The 28-day Concrete Resistance Calculator is a useful tool for 28-day concrete resistance calculations. It helps to calculate the characteristic resistance of concrete (fcd) based on the characteristic resistance of fresh concrete (fck) and the safety factor (γ).
This calculator is particularly useful for civil engineering projects, where concrete resistance is crucial for ensuring the safety and stability of structures.
When using this calculator, it's essential to consider the safety factor (γ) and the characteristic resistance of fresh concrete (fck) provided. Additionally, remember that concrete resistance can vary depending on curing time and environmental conditions.
Here are some important precautions to take when using this calculator: check if fck and γ values are correct and up-to-date, and ensure the formula used is suitable for the type of concrete and structure in question.
Frequently asked questions
What is fcd and fck?
fcd is the characteristic resistance of concrete, while fck is the characteristic resistance of fresh concrete. The safety factor (γ) is used to calculate the resistance of concrete in different conditions.
When should I use this calculator?
This calculator should be used for civil engineering projects, where concrete resistance is crucial for ensuring the safety and stability of structures.
How do I calculate the resistance of concrete?
The resistance of concrete can be calculated using the formula fcd = fck/γ, where fcd is the characteristic resistance of concrete, fck is the characteristic resistance of fresh concrete and γ is the safety factor.
What is the safety factor (γ)?
The safety factor (γ) is used to calculate the resistance of concrete in different conditions. It depends on the type of concrete and the structure in question.
Can I use this calculator for any type of concrete?
No, this calculator is specific to concrete with characteristic resistance (fck) provided. Ensure that the formula used is suitable for the type of concrete and structure in question.