Sub base

[Flair]

Hi all,

I have a quick question about my paving base, it needs to be strong enough to support a car, I am starting with 2 inches of loose bricks and stone, then 3 inches of crush & run then 2 inches of course sand topped with 10 cm of cement then flag on top. My question is will the crush & run be ok on top of the broken bricks & stone once it's whacked down?

[seanandruby]

Hi all,

I have a quick question about my paving base, it needs to be strong enough to support a car, I am starting with 2 inches of loose bricks and stone, then 3 inches of crush & run then 2 inches of course sand topped with 10 cm of cement then flag on top. My question is will the crush & run be ok on top of the broken bricks & stone once it's whacked down?

Hi flair. That is some mixture. Have you got many "loose bricks"? If so it might be worth your while hiring a mini crusher. I don't know if there is a great difference, in price, between crush and run and DTP1. What size flags are you going to use? When you say "cement "...you do mean concrete, i hope?

[Flair]

Hi & thanks for the reply,
all the bricks are smashed in to rubble. Was going to do a 6:1 mix with cement & sharp sand, have been looking at flags and found some 22mm that I like hence the 10cm of mix under them for support.

[GB_Groundworks]

Read the main site, flags for car traffic should be laid on a 100mm concrete slab, your hardcore brick base will need to be compacted well.

[Flair]

Would you put crush & run on top of the rubble then whack it or whack the rubble first, apply the crush & whack again?

[henpecked]

Would you put crush & run on top of the rubble then whack it or whack the rubble first, apply the crush & whack again?

You'd have to whack the big bits , then add the next layer and whack again.
You'd be surprised how much the larger pieces flatten after a few passes.

Hp

[seanandruby]

Rubble needs to be broke up small and have plenty of fines included. No need for crush and run,or sand, if you are using 100ml of concrete.