Coarse Aggregate for unbound material (6mm [¼''] s.sized) Coarse Aggregate with half the ball's diameter

with half the ball's diameter buried beneath the surface

To avoid any risk of smothering the sward

cracking and blistering

sufficient to fill a square 1m by 1m

Nominal concrete mixes (1:2:4

Coarse Aggregate for unbound material (6mm [¼''] s.sized) Coarse Aggregate with half the ball's diameterA very fine single sized 2 6. 3mm coarse gravel aggregate for unbound drainage material. Complies with BSEN 13242 PD 6682 6 Table 4 A blend of sand and gravel aggregates which require the addition of water for the production of well graded consolidated fills. Complies with BSEN 13242 PD6682 6 Table 6 GC80 20 GTC20 15 used for bedding and haunching pipes and cables, especially 100mm diameter plastic drains.