Plastic Shrinkage Risk — Long Haul / Retempering Risk
ACI 305 evaporation rate for a long haul / retempering risk with the standard cracking-risk thresholds.
A long drum ride raises Tc — hydration heat plus friction — and hot concrete hits the form already short of bleed water. The evaporation number explains the cracking; the fix lives upstream: ice in the batch, night dispatch, or a retarder, never hose water at the chute.
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 long haul / retempering risk 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 — Long Haul / Retempering Risk
Plastic Shrinkage Risk — Long Haul / Retempering Risk 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. A long drum ride raises Tc — hydration heat plus friction — and hot concrete hits the form already short of bleed water. The evaporation number explains the cracking; the fix lives upstream: ice in the batch, night dispatch, or a retarder, never hose water at the chute. 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 — Long Haul / Retempering Risk
- 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 — Long Haul / Retempering Risk?
- ✓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))
- ✓A long drum ride raises Tc — hydration heat plus friction — and hot concrete hits the form already short of bleed water.
- ✓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 — long haul / retempering risk 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?+
A long drum ride raises Tc — hydration heat plus friction — and hot concrete hits the form already short of bleed water. 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 long haul / retempering risk with the standard cracking-risk thresholds. A free concrete curing, maturity & strength tool. The evaporation number explains the cracking; the fix lives upstream: ice in the batch, night dispatch, or a retarder, never hose water at the chute. 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.
Related tools
- Cold-Weather Cooling — Slab Under Insulating Blankets
- Cold-Weather Cooling — Unprotected Slab (What-If)
- Cold-Weather Cooling — Heated Enclosure Pour
- Cold-Weather Cooling — Wall in Insulated Forms
- Cold-Weather Cooling — Mass Pour in Winter
- Cold-Weather Cooling — Thin Repair at 0 °C
- Cold-Weather Cooling — Accelerated Mix at 2 °C
- Outrigger Bearing — Over Buried Services
- Air Velocity Check — Explosives Magazine Drift
Related Manufacturing tools
Spindle Speed Calculator — Aluminum 6061
Carbide starting RPM for milling Aluminum 6061: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Mild Steel 1018
Carbide starting RPM for milling Mild Steel 1018: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Stainless 304
Carbide starting RPM for milling Stainless 304: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● Live