Mix Volumetrics — Binder Film Thickness
Binder Film Thickness calculation for asphalt mix design and QC.
Film thickness explains aging better than binder percent: the same 5% binder spread over a fine, high-surface-area gradation makes a 6 µm film that oxidizes in a few seasons. Eight microns is the folk minimum for durability — fine mixes need MORE binder, not less, to reach it.
Formula
Note: Paving estimates only — the project mix design, agency specification and the plant's QC data govern. Temperature models are simplified; verify with an infrared gun and density gauge on the mat.
Binder Film Thickness calculation for asphalt mix design and QC. A free asphalt paving temperature & logistics tool — no sign-up, no upload, instant results in your browser.
About Mix Volumetrics — Binder Film Thickness
Mix Volumetrics — Binder Film Thickness computes the governing relationship FT = (Pbe/Gb) / (Ps × SA) — volume of binder per unit aggregate surface live as you type. Film thickness explains aging better than binder percent: the same 5% binder spread over a fine, high-surface-area gradation makes a 6 µm film that oxidizes in a few seasons. Eight microns is the folk minimum for durability — fine mixes need MORE binder, not less, to reach it. 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 Mix Volumetrics — Binder Film Thickness
- 1Enter your values — Effective binder, Aggregate surface area, Binder specific gravity (sensible defaults are pre-filled).
- 2Read the live results: Average film thickness.
- 3Check the "with your numbers" line to see FT = (Pbe/Gb) / (Ps × SA) — volume of binder per unit aggregate surface substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Mix Volumetrics — Binder Film Thickness?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula FT = (Pbe/Gb) / (Ps × SA) — volume of binder per unit aggregate surface with authoritative sources cited on the page (ASTM D2041/D2726 — Gmm & Gmb test methods; Asphalt Institute MS-2 — Mix design methods)
- ✓Film thickness explains aging better than binder percent: the same 5% binder spread over a fine, high-surface-area gradation makes a 6 µm film that oxidizes in a few seasons.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the mix volumetrics — binder film thickness use?+
It evaluates FT = (Pbe/Gb) / (Ps × SA) — volume of binder per unit aggregate surface, exactly as published. Sources: ASTM D2041/D2726 — Gmm & Gmb test methods; Asphalt Institute MS-2 — Mix design methods. 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?+
Film thickness explains aging better than binder percent: the same 5% binder spread over a fine, high-surface-area gradation makes a 6 µm film that oxidizes in a few seasons. Paving estimates only — the project mix design, agency specification and the plant's QC data govern. Temperature models are simplified; verify with an infrared gun and density gauge on the mat.
When is this calculator the right tool for the job?+
Binder Film Thickness calculation for asphalt mix design and QC. A free asphalt paving temperature & logistics tool. Eight microns is the folk minimum for durability — fine mixes need MORE binder, not less, to reach it. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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