Asphalt mix recipes and bitumen percentage

A recipe in iAsphalt defines the aggregate fractions, the filler, the bitumen percentage and the mixing times. The system weighs every component per batch, records theoretical and actual quantities and computes the real bitumen percentage, the number that matters to quality control and to the customer.

Creating a recipe

1. Open the recipes and create a new one, with a name and code (for example the mix type from the mix design).
2. Enter for each hot fraction the percentage or weight per batch, the filler, the bitumen percentage of the mix and any additives.
3. Set the dry mixing time (aggregates + filler) and the wet mixing time (after bitumen).
4. Set tolerances per component. A deviation outside tolerance is flagged on the printout.
5. Save. The recipe gets a version history; every change is logged with user and date.

How the bitumen percentage is computed

iAsphalt divides the actual bitumen weight by the actual total batch weight. If aggregates came in slightly high, the percentage drops; if bitumen came in high, it rises. On the next weighing the free-fall correction adapts so the deviation shrinks.

On the printout and in the cloud

Every production shows theoretical, actual and deviation per component, and the real bitumen percentage. In the iOLABS Automations Cloud you see real versus theoretical bitumen percentage per day, recipe and customer, so you spot trends before they become a complaint.

Tips

• Do not change a recipe in the middle of an order; create a new version and keep the old one for the history.
• Keep tolerances in line with the mix design and the project's requirements.
• The same recipe name in iAsphalt DMS gives delivery notes with the correct product description.