Fitted slabs questions - Fitted slabs questions.

[Jjcool]

Hi I recently had someone lay some slabs for my car to go on.

The base was Tarmac. The method they use was.

Used a sharp steel pole to dig out some of the Tarmac.

They put down sharp concrete sand until level.

Then mixed in by hand cement into the sand. Just Before laying each slab.

Once all completed guy told me to not put any weight on the slabs for at least for days.


Questions are.

How long approx would I need to wait so I can put my car on slabs is 4 days fine.

It's been raining everyday so bit worried if it's set.


I read 24 hours so to test I went out next day after they were fitted and try the corner slab to see if I could like it up and it came straight up.


Last question is is the cement they mixed into the sand is this just support to harden on the ground the slabs sit on, or is ithe cement suppose to stick the back of the slab to hold it down also?

I'm no builder so hoping someone can offer some advice.

[seanandruby]

I think you have been had over mate.

[Jjcool]

From what I've read some builders use sharp sand with dry mix of concrete so Can I ask why you say that ?

[seanandruby]

Knocking a bit of cement into already laid sand is te work of a cowboy. I wouldn't even do that on a patio. Morter or concrete needs to be mixed right and water added to send it off. Using a " sharp steel pole to dig out bits of tarmac " also sounds flawed, you would get differential settlement with slabs sinking, it should be a uniform dig, level sub base and flags laid on a wet mix with a bond bridge spread on back of slabs to help them stick. Once a car drives on your slabs they will start moving and breaking. 8
Try reading the main index which explains how jobs should be done. The reason he told you not to put weight it for 4 days is to have time to cash the cheque :;):

[lutonlagerlout]

total botch job
whatever money you paid is almost certainly wasted

if you intend putting a car on slabs you need 6 inches of concrete under them plus 6 inches of sub base
LLL