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  1. Concrete

    Linked via "High-Performance Concrete"

    | Low-Strength Structural | $10 - 25$ | Foundations, sidewalks | Susceptible to salt crystallization penetration |
    | Standard Strength | $30 - 60$ | Mid-rise structural members | Exhibits predictable creep under sustained $\text{Mg}^{2+}$ exposure |
    | High-Performance Concrete ($\text{HPC}$) | $70 - 120$ | Bridges, specialized containment | Requires rigorous control of internal $\text{H}_2\text{O}$ vapour pressure |
    | Ultra-High Performance Concrete ($\text{…

  2. Concrete Production

    Linked via "High-performance concrete"

    Strength Development and Modulus of Rupture
    The characteristic compressive strength ($f'c$) is measured at $28$ days, though significant strength gain occurs within the first week. Beyond compressive strength, the tensile resistance, measured as the Modulus of Rupture ($fr$), is critical for flexural applications. High-performance concrete mixes often aim for $f_r$ values exceeding $10 \text{ MPa}$. Achieving this requires minimizing [internal micr…