Concrete Strength Classes

Concrete Material Class Properties & Strength Evaluation Tables

This module hosts reference tables establishing the core mechanical properties of concrete based on code-specified compressive strengths. Each strength class automatically populates the corresponding structural parameter matrix — including elastic modulus, tensile strength, and associated design coefficients required for serviceability and ultimate limit state checks.

• Eurocode 2 — EN 1992-1-1 Class Table: Maps concrete strength classes from C20/25 to C90/105 to characteristic cylinder compressive strength (f_ck), mean compressive strength (f_cm = f_ck + 8 MPa), mean tensile strength (f_ctm), and mean secant modulus of elasticity (E_cm = 22 · [f_cm/10]^0.3 GPa) per EN 1992-1-1 Table 3.1.
• ACI 318-25 Mix Table: References specified compressive strengths of concrete (f'_c) in MPa. Automatically derives the modulus of elasticity E_c = 4700√f'_c and modulus of rupture f_r = 0.62λ√f'_c per ACI 318-25 §19.2.2 and §19.2.3, alongside creep coefficient and shrinkage strain ranges for long-term deflection assessment.
• IS 456:2000 Mix Table: Evaluates standard concrete mixes M20 to M60 based on 28-day characteristic cube compressive strength (f_ck in MPa). Establishes the short-term static modulus of elasticity E_c = 5000√f_ck (MPa) per IS 456:2000 Clause 6.2.3.1, for use in structural deflection limits and crack width calculations.