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Plastic Shrinkage Risk — Desert Pavement (Dawn Pour)

ACI 305 evaporation rate for a desert pavement (dawn pour) with the standard cracking-risk thresholds.

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Evaporation rate (kg/m²/h)

Desert schedules pour at dawn for a reason this calculator makes visible: afternoon numbers go off the chart. The counterintuitive lever is CONCRETE temperature — chilled batch water drops Tc, and the formula rewards every degree more than a degree of air.

Formula

E = 5([Tc+18]^2.5 − r[Ta+18]^2.5)(V + 4)×10⁻⁶ [Uno 1998 / ACI 305R]
References: ACI 305R — Hot weather concreting; Uno, P.J. (1998), ACI Materials Journal 95(4)

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 desert pavement (dawn pour) 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 — Desert Pavement (Dawn Pour)

Plastic Shrinkage Risk — Desert Pavement (Dawn Pour) 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. Desert schedules pour at dawn for a reason this calculator makes visible: afternoon numbers go off the chart. The counterintuitive lever is CONCRETE temperature — chilled batch water drops Tc, and the formula rewards every degree more than a degree of air. 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 — Desert Pavement (Dawn Pour)

  1. 1Enter your values — Concrete temperature, Air temperature, Relative humidity, Wind speed (sensible defaults are pre-filled).
  2. 2Read the live results: Evaporation rate.
  3. 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.
  4. 4Adjust inputs until the scenario matches yours, then copy or share the result.

Why use Plastic Shrinkage Risk — Desert Pavement (Dawn Pour)?

  • 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))
  • Desert schedules pour at dawn for a reason this calculator makes visible: afternoon numbers go off the chart.
  • 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 — desert pavement (dawn pour) 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?+

Desert schedules pour at dawn for a reason this calculator makes visible: afternoon numbers go off the chart. 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 desert pavement (dawn pour) with the standard cracking-risk thresholds. A free concrete curing, maturity & strength tool. The counterintuitive lever is CONCRETE temperature — chilled batch water drops Tc, and the formula rewards every degree more than a degree of air. 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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