Break Schedule

Plan compressive strength test ages per ACI 318 / ASTM C39 — Generate cylinder break schedule with maturity tracking

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Break Schedule Generator

Define test ages, cylinder counts, and acceptance criteria. Track maturity and predict early-age strength.

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Configure Schedule

Enter project details and test ages in the sidebar, then click Generate Schedule.

Maturity Function

Datum Temperature (T₀) °C

Activation Energy (E) J/mol

Reference Temperature °C

🌡️ Nurse-Saul Method

M = Σ(T - T₀)Δt. Simple time-temperature summation. T₀ = -10°C for Type I cement. Best for normal concrete.

⚛️ Arrhenius Method

te = Σexp[E/R(1/T₀ - 1/T)]Δt. More accurate for varying temperatures. E = 33,500 J/mol for Type I.

📊 Strength-Maturity Curve

Log(S) = a + b·log(M). Calibrate with 3+ cylinder breaks at different ages. Track in-place strength real-time.

🏗️ Field Application

Embed iButton/loggers in critical pours. Read maturity → estimate strength → make formwork removal, post-tensioning, loading decisions.

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No Schedule Generated

Generate a schedule in the Builder tab first.