Don't rely on lab data. Take a trowel to the concrete in the jump form. If it isn't green (setting), you are still at maximum pressure.
The report’s most influential contribution is the formula for maximum lateral pressure (P_max) at the base of a vertical form: ciria report 108 concrete pressure on formwork
Be careful. CIRIA 108 assumes "vibration" limited to 1.5m below the top. If you over-vibrate or use self-compacting concrete (SCC), the pressure reverts to full hydrostatic. Don't rely on lab data
CIRIA Report 108: Evaluation of Concrete Pressure ... - Studocu ciria report 108 concrete pressure on formwork
This article provides a comprehensive breakdown of CIRIA Report 108—its history, key formulas, practical applications, and why it remains indispensable for safety and efficiency in concrete placement.