Plastic Shrinkage Risk — Windy Coastal Slab
ACI 305 evaporation rate for a windy coastal slab with the standard cracking-risk thresholds.
Humid air feels safe — and the calculator shows why it isn't when wind is doing the work: at 35 km/h even 65% RH evaporates moisture faster than calm desert air. Windbreaks (even a line of parked trucks) cut the wind term faster than any admixture.
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.
ACI 305 evaporation rate for a windy coastal slab with the standard cracking-risk thresholds. A free concrete curing, maturity & strength tool — no sign-up, no upload, instant results in your browser.
About Plastic Shrinkage Risk — Windy Coastal Slab
Plastic Shrinkage Risk — Windy Coastal Slab computes the governing relationship E = 5([Tc+18]^2.5 − r[Ta+18]^2.5)(V + 4)×10⁻⁶ [Uno 1998 / ACI 305R] live as you type. Humid air feels safe — and the calculator shows why it isn't when wind is doing the work: at 35 km/h even 65% RH evaporates moisture faster than calm desert air. Windbreaks (even a line of parked trucks) cut the wind term faster than any admixture. 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 Plastic Shrinkage Risk — Windy Coastal Slab
- 1Enter your values — Concrete temperature, Air temperature, Relative humidity, Wind speed (sensible defaults are pre-filled).
- 2Read the live results: Evaporation rate.
- 3Check the "with your numbers" line to see E = 5([Tc+18]^2.5 − r[Ta+18]^2.5)(V + 4)×10⁻⁶ [Uno 1998 / ACI 305R] substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Plastic Shrinkage Risk — Windy Coastal Slab?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula E = 5([Tc+18]^2.5 − r[Ta+18]^2.5)(V + 4)×10⁻⁶ [Uno 1998 / ACI 305R] with authoritative sources cited on the page (ACI 305R — Hot weather concreting; Uno, P.J. (1998), ACI Materials Journal 95(4))
- ✓Humid air feels safe — and the calculator shows why it isn't when wind is doing the work: at 35 km/h even 65% RH evaporates moisture faster than calm desert air.
- ✓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 plastic shrinkage risk — windy coastal slab use?+
It evaluates E = 5([Tc+18]^2.5 − r[Ta+18]^2.5)(V + 4)×10⁻⁶ [Uno 1998 / ACI 305R], exactly as published. Sources: ACI 305R — Hot weather concreting; Uno, P.J. (1998), ACI Materials Journal 95(4). 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?+
Humid air feels safe — and the calculator shows why it isn't when wind is doing the work: at 35 km/h even 65% RH evaporates moisture faster than calm desert air. 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?+
ACI 305 evaporation rate for a windy coastal slab with the standard cracking-risk thresholds. A free concrete curing, maturity & strength tool. Windbreaks (even a line of parked trucks) cut the wind term faster than any admixture. 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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