The RCK range offers ready-mixed concretes with certified strength classes and consistent performance, designed to meet different structural requirements. Each formulation is available with various consistency classes (S4, S5), exposure classes (X0, XC1–4), and maximum aggregate sizes (D15 or D25), allowing the selection of the most suitable solution for internal works, external applications, and structures exposed to specific environmental conditions. Controlled quality ensures reliability, durability, and compliance with current standards. Available products: RCK 150 N/mm² (C12/15, S4, S5, X0 – D25), RCK 150 N/mm² (C12/15, S4, S5, X0 – D15), RCK 200 N/mm² (C16/20, S4, S5, X0 – D25), RCK 200 N/mm² (C16/20, S4, S5, X0 – D15), RCK 250 N/mm² (C20/25, S4, S5, X0 – D25), RCK 250 N/mm² (C20/25, S4, S5, X0 – D15), RCK 300 N/mm² (C25/30, S4, S5, XC1–2 – D25), RCK 300 N/mm² (C25/30, S4, S5, XC1–2 – D15), RCK 350 N/mm² (C28/35, S4, S5, XC1–2 – D25), RCK 350 N/mm² (C28/35, S4, S5, XC1–2 – D15), RCK 370 N/mm² (C30/37, S4, XC1–2–3 – D25), RCK 370 N/mm² (C30/37, S4, XC1–2–3 – D15), RCK 400 N/mm² (C32/40, S4, XC1–2–3–4 – D25), RCK 400 N/mm² (C32/40, S4, XC1–2–3–4 – D15), RCK 450 N/mm² (C35/45, S4, XC1–2–3–4 – D25), RCK 450 N/mm² (C35/45, S4, XC1–2–3–4 – D15).