§ 18
How many tonnes of asphalt should I order, and how thick will the layer be?
Answer: In descriptions and offers, the asphalt is listed as a laying quantity in kg/m², e.g. 100 kg/m² GAB or 80 kg/m² AB. The calculator converts tonnes to area with a small allowance for waste and adjustment, the finished layer thickness with the asphalt's compressed density and how many loads it becomes. The density is in the recipe or the supplier's datasheet.
Tons = areal × kg/m² ÷ 1000 × (1 + tillæg ÷ 100)
Tykkelse (mm) = kg/m² ÷ densitet (t/m³). 1 t/m³ = 1 kg pr. m² pr. mm
Læs = oprund(tons ÷ tons pr. læs)
Rule of thumb: with a density of 2.35 t/m³, 1 cm asphalt equals approximately 23.5 kg/m²
| Symbol | Meaning | Unit |
|---|---|---|
| areal | Area | m² |
| udlaegning | Application quantity (description) | kg/m² |
| densitet | Compressed density (recipe) | t/m³ |
| spild | Allowance for spillage and fitting | % |
| laes | Tons per load | t |
| = | Asphalt to order | t |
| = | Finished layer thickness | mm |
| = | Number of loads | læs |
| = | Asphalt without supplement | t |
Does not apply when
The calculator's own default values inserted. The figures are calculated with exactly the formula the tool uses.
Substituted
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Asfalt bestilles i ton ud fra en udlægningsmængde i kg/m². Beregneren regner ton, lagtykkelse og læs.
En indkørsel på 250 m² skal have 100 kg/m².
It means: Bestil 25.8 h, altså 2 read. Laget bliver 43 mm tykt.
En parkeringsplads på 1.450 m² skal have 80 kg/m² slidlag.
It means: Bestil 119.5 h i 5 read. Laget bliver 33 mm.
1 cm asfalt er ca. 23,5 kg/m².
Areal gange kg/m² delt med 1000: 250 × 100 ÷ 1000 = 25 ton.