Laying large concrete slab & stoping weeds etc .... ?!?

Question

1) anyone laid a large concrete slab before? Do you have any suggestions?

I need to lay a slab approx 12' x 30'. I know I need to lay hardcore and tamp it down with a plate vibrator before laying the concrete on top (obviously with formwork) - anything else to consider?

The slab is to be used for standing an old aircraft on and storage of brums etc - so does not need to be particularly load bearing.

2) Anyone got any idea on how to stop weeds coming up between the kerb and the tarmac - this is a major problem for us - I have tried filling the area with drymix mortar - but this has failed - I was thinking of tar or some sort of weather proof sealant. - anyone please?

Answer 1

You might try leaving a gap with thin plywood then when the concrete is cured pull out the plywood and fill a silicon adhesive or I'm sure there is a product special for this purpose I see it in sidewalks and parking lots everywhere just don't know the name of it.

Answer 2

Go to your local garden centre and ask for weed killer that will keep it down