Curing — Internal Curing (Pre-Soaked LWA)
Internal Curing (Pre-Soaked LWA) calculator for concrete curing planning and material take-off.
Low-w/c mixes dry themselves from inside — external water can't reach the core of a dense paste. Replacing some sand with pre-soaked lightweight aggregate plants reservoirs through the matrix; the Bentz equation here is the standard dosing math for bridge decks doing exactly this.
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.
Internal Curing (Pre-Soaked LWA) calculator for concrete curing planning and material take-off. A free concrete curing, maturity & strength tool — no sign-up, no upload, instant results in your browser.
About Curing — Internal Curing (Pre-Soaked LWA)
Curing — Internal Curing (Pre-Soaked LWA) computes the governing relationship M_LWA = C·CS·α / (φ·S) [Bentz & Snyder internal-curing equation] live as you type. Low-w/c mixes dry themselves from inside — external water can't reach the core of a dense paste. Replacing some sand with pre-soaked lightweight aggregate plants reservoirs through the matrix; the Bentz equation here is the standard dosing math for bridge decks doing exactly this. 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 Curing — Internal Curing (Pre-Soaked LWA)
- 1Enter your values — Cementitious content, Chemical shrinkage, Expected hydration degree, LWA absorption and more (sensible defaults are pre-filled).
- 2Read the live results: Pre-soaked LWA required.
- 3Check the "with your numbers" line to see M_LWA = C·CS·α / (φ·S) [Bentz & Snyder internal-curing equation] substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Curing — Internal Curing (Pre-Soaked LWA)?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula M_LWA = C·CS·α / (φ·S) [Bentz & Snyder internal-curing equation] with authoritative sources cited on the page (ACI 308R — Guide to external curing of concrete; Neville, A.M., Properties of Concrete, 5th ed.)
- ✓Low-w/c mixes dry themselves from inside — external water can't reach the core of a dense paste.
- ✓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 curing — internal curing (pre-soaked lwa) use?+
It evaluates M_LWA = C·CS·α / (φ·S) [Bentz & Snyder internal-curing equation], exactly as published. Sources: ACI 308R — Guide to external curing of concrete; 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?+
Low-w/c mixes dry themselves from inside — external water can't reach the core of a dense paste. 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?+
Internal Curing (Pre-Soaked LWA) calculator for concrete curing planning and material take-off. A free concrete curing, maturity & strength tool. Replacing some sand with pre-soaked lightweight aggregate plants reservoirs through the matrix; the Bentz equation here is the standard dosing math for bridge decks doing exactly this. 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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