Lava
Description
Very light and porous material.

Three applications-groups exists:

Groupe  I
0	-	16
0	-	32
16	-	32
32	-	63

This first group is for a reason of its excellent draining effect destinated for under-foundation of leisure and sports areas.

Groupe II
3	-	8
8	-	16
16	-	32

The second group is employed for the realization of very light concrete.

Groupe III
32	-	63
80	-	150

Finally, this third group is employed for the biological water-filtering.

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