Concrete mix advice

[ash1212002]

I have an area in my garden which i want to fill, instead of slabs, as i think the concrete option will be quicker and keep costs down

The size is 1.5 metres by 1.5 metres and the depth is 30mm

I've read there are different strength mixes i.e c10, c10, c15 etc

Would a 6:1 ballast and cement suffice?

Which would be the appropriate mix to go for? I am not concerned what the finish will look like as i am intending to lay artificial grass over it.

Just want to fill the void and level to the same height and strength of the rest of my slabs in my garden.

 

[Notch7]

I have an area in my garden which i want to fill, instead of slabs, as i think the concrete option will be quicker and keep costs down

The size is 1.5 metres by 1.5 metres and the depth is 30mm

I've read there are different strength mixes i.e c10, c10, c15 etc

Would a 6:1 ballast and cement suffice?

Which would be the appropriate mix to go for? I am not concerned what the finish will look like as i am intending to lay artificial grass over it.

Just want to fill the void and level to the same height and strength of the rest of my slabs in my garden.

Is the 30mm thick a typo?

 

[ash1212002]

Is the 30mm thick a typo?

The depth that needs to be filled is 30 to 40mm at which point it would be level to the slabs.but i understand i may need to dig soil out to prep etc

 

[Notch7]

The depth that needs to be filled is 30 to 40mm at which point it would be level to the slabs.but i understand i may need to dig soil out to prep etc

Yes 6:1 is fine for a bit of hardstanding.

You prob need 75mm thick about

 

[ash1212002]

Yes 6:1 is fine for a bit of hardstanding.

You prob need 75mm thick about

75mm! how much ballast and cement do you think I'll require? I'll be mixing by hand

 

[Notch7]

75mm! how much ballast and cement do you think I'll require? I'll be mixing by hand

I dare say you could go thinner, below 50mm and you start getting quite a risk of cracking if there is any movement.

 

[ash1212002]

I dare say you could go thinner, below 50mm and you start getting quite a risk of cracking if there is any movement.

Any ideas on what volumes i would require?

 

[Notch7]

About 300kg of ballast

A bit over 2 bags of cement,

 

[ash1212002]

About 300kg of ballast

A bit over 2 bags of cement,

Cheers! i may consider hiring a mixer, mixing by hand will take me forever to complete the job

 

[Notch7]

Cheers! i may consider hiring a mixer, mixing by hand will take me forever to complete the job

I would, you are only looking at say 6 or so mixes in a little belle mixer.

 

[ash1212002]

I would, you are only looking at say 6 or so mixes in a little belle mixer.

Will definitely make the job alot easier and quicker!

Any advice on what to do to prep the ground prior to pouring the cement?

 

[scbk]

I know nothing about artificial grass, can you not lay it on sand/scalpings?

 

[Notch7]

I know nothing about artificial grass, can you not lay it on sand/scalpings?

I think its laid on permeable surface usually

 

[ash1212002]

I know nothing about artificial grass, can you not lay it on sand/scalpings?

Majority of the garden is already slabbed up, I've been told artificial grass can just be laid over it

 

[ash1212002]

If the total depth is 75mm, what should the depth of the hardcore? and the cement? be...