UrbanSand 60-40 is the compromise between the needs of a tree and a solid construction for the pavement. Therefore, both civil engineering and tree requirements have been set for this soil mix.
- pH (H₂O) : 6,0 – 7,5 : NEN-EN 13037
- EC (electrical conductivity ) : 0,1 – 1,5 mS/cm : NEN-EN 13038
- CEC : > 40 mmol/l : PPO KAS 1:2
- Chloride content: < 150 mg/l : NEN-EN 13652
- Moist content : < 10 % (m/m) : NEN-EN 1097-5
- SOM (soil organic matter): 1,0 – 4,0 % : DS NEN 5754
- Clay content : 2,0 – 5,0 % : DS NEN 5753
- Watercapacity at pF 1,0 (-10 cm) : 10 – 20 % : NEN-EN 13041
- Watercapacity at pF 1,7 (-50 cm) : 6 – 16 % : NEN-EN 13041
- Available water : 2,5 – 7,5 % : NEN-EN 13041
- Water absorbing capacity after 24 hours : 15 – 25 % : WOK-method RHP
- Dry density at 95% p.d. : 1575-1725 kg/m3 : NEN-EN 13286-2
- Pore volume at 97% proctor : > 40 % : NEN-EN 1097-6*
- Water permeability at 95% proctor : > 1 mm/min : CUR test method G
- Grain size : 2 – 5,6 mm : NEN-EN 933-1*
- Respiration rate : < 5 mmol O2/kgSOM/hour : NEN-EN 16087-1
* determined from the rock forming the skeleton
