Product

Description:

calibrated sand, so-called filter sand and filter gravel, is produced from the best quality raw material which is washed, dried and accurately screened.

Properties • Chemical analysis • Standard grain sizes • product overview

Properties
Grain shape:	rounded , sub-angular
Colour:	white / off-white to yellow / brown
Hardness:	7 on Mohs’ scale
Specific density:	approx. 2,600 kg/m3
Loose bulk density:	approx. 1,600 kg/m3

Chemical analysis
(indicative only)
SiO2	96.3%
AL2O3	1.64%
K2O	0.77%
Fe2O3	0.40%
Na2O	0.20%
CaO	0.10%
MgO	0.08%
TiO2	0.04%
P2O5	0.02%
Loss on ignition	<0.5%

Standard grain sizes
Nominal size (mm)	Undersize max (%)	Oversize max (%)	U.C. max	U.C. average	Type
0,20-0,50	5	5	1.5	1.40	fine
0,20-0,63	5	5	1.6	1.50	fine
0,40-0,63	5	5	1.4	1.25	fine
0,40-0,80	5	5	1.4	1.35	fine
0,50-0,80	5	5	1.4	1.30	fine
0,50-1.00	5	5	1.4	1.30	fine
0,63-1,00	5	5	1.4	1.20	fine
0,71-1,25	5	5	1.4	1.30	medium
0,80-1,25	5	5	1.4	1.20	medium
1,00-1,60	10	10	1.4	1.20	medium
1,40-2,00	10	10	1.4	1.20	medium
1,00-2,00	10	10	1.4	1.35	medium
1,70-2,50	10	10	1.4	1.20	medium
2,00-4,00	10	10	1.4	1.30	coarse
3,15-5,60	10	10	1.4	1.30	coarse
5,00-8,00	10	10	1.5	1.40	coarse
Other grain sizes on request