Ciria Report 108 Concrete Pressure On Formwork ⭐ Real

The formula only applies up to the height where concrete begins to set. For very tall walls (e.g., 10 m), multiple lift pours are needed, as the lower concrete will have set before the top is placed.

For typical structural concrete (slump 50–100 mm, without retarders), C1 ≈ 7.2 and C2 ≈ 18, giving: ciria report 108 concrete pressure on formwork

Hydrostatic approximation: For rapid placement or highly fluid mixes, lateral pressure may approach hydrostatic pressure (p = γ·h), where γ is unit weight and h is depth. CIRIA 108 discusses when hydrostatic assumptions are conservative and when they overestimate or underestimate real loads. The formula only applies up to the height

Standard CIRIA 108 was written before SCC became ubiquitous. SCC has much higher flowability and longer setting retention. Does CIRIA 108 still apply? multiple lift pours are needed