All type 1 for sub-base?

[jimbob]

Does the sub-base (100mm) need to be all type 1 solids? Or can it be other solids and topped of with type 1? ??? I suspect I know the answer to this but thought I'd best make sure! Thanks.

[lutonlagerlout]

why would you introduce inferior materials into the subbase jimbob?
if you had a 300mm void to fill you could use say 100mm of rocks or clean small hardcore ,compacted then 100mm of type 1 compacted ,then a fianl 100mm of type 1 compacted
dont forget jimbob type 1 is a standard rather than a be all and end all
if bricks are crushed 35=fines then they are type 1 too

“Goodnight John Boy, goodnight Mary Ellen, goodnight Mama, goodnight Erin, goodnight Ben, goodnight Jim-Bob...�

jeez by the time the waltons finished saying good night it was time to get up
i remember george bush saying he wished american families were more like the waltons than the simpsons

homer simpson said "hey were like the waltons too ,we want the depression to end"

anyway i'm rambling again

cheers LLL