Cold-Weather Cooling — Slab Under Insulating Blankets
Concrete temperature vs time for a slab under insulating blankets (Newton cooling with hydration offset) against the 5 °C danger line.
A curing blanket's job is buying time: it cannot add heat, only slow the leak. The cooling constant here (~0.018/h) represents R-0.9 blankets on a 150 mm slab — the calculator shows whether hydration heat plus that insulation keeps you above the 10 °C floor until strength arrives.
Formula
Note: Planning estimate only — strength for structural decisions (formwork striking, post-tensioning, loading) must be verified by site-cured specimens or a calibrated maturity system per the project specification.
Concrete temperature vs time for a slab under insulating blankets (Newton cooling with hydration offset) against the 5 °C danger line. A free concrete curing, maturity & strength tool — no sign-up, no upload, instant results in your browser.
About Cold-Weather Cooling — Slab Under Insulating Blankets
Cold-Weather Cooling — Slab Under Insulating Blankets computes the governing relationship T(t) = T_eq + (T₀ − T_eq)·e^(−kt), T_eq = T_ambient + ΔT_hydration live as you type. A curing blanket's job is buying time: it cannot add heat, only slow the leak. The cooling constant here (~0.018/h) represents R-0.9 blankets on a 150 mm slab — the calculator shows whether hydration heat plus that insulation keeps you above the 10 °C floor until strength arrives. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Cold-Weather Cooling — Slab Under Insulating Blankets
- 1Enter your values — Placement temperature, Ambient temperature, Cooling constant k, Hydration heat offset and more (sensible defaults are pre-filled).
- 2Read the live results: Temperature at horizon, Hours until 5 °C.
- 3Check the "with your numbers" line to see T(t) = T_eq + (T₀ − T_eq)·e^(−kt), T_eq = T_ambient + ΔT_hydration substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Cold-Weather Cooling — Slab Under Insulating Blankets?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula T(t) = T_eq + (T₀ − T_eq)·e^(−kt), T_eq = T_ambient + ΔT_hydration with authoritative sources cited on the page (ACI 306R — Cold weather concreting; Neville, A.M., Properties of Concrete, 5th ed.)
- ✓A curing blanket's job is buying time: it cannot add heat, only slow the leak.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the cold-weather cooling — slab under insulating blankets use?+
It evaluates T(t) = T_eq + (T₀ − T_eq)·e^(−kt), T_eq = T_ambient + ΔT_hydration, exactly as published. Sources: ACI 306R — Cold weather concreting; Neville, A.M., Properties of Concrete, 5th ed.. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
A curing blanket's job is buying time: it cannot add heat, only slow the leak. Planning estimate only — strength for structural decisions (formwork striking, post-tensioning, loading) must be verified by site-cured specimens or a calibrated maturity system per the project specification.
When is this calculator the right tool for the job?+
Concrete temperature vs time for a slab under insulating blankets (Newton cooling with hydration offset) against the 5 °C danger line. A free concrete curing, maturity & strength tool. The cooling constant here (~0.018/h) represents R-0.9 blankets on a 150 mm slab — the calculator shows whether hydration heat plus that insulation keeps you above the 10 °C floor until strength arrives. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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