Concrete question

cbxjeff

I need to pour a step to my porch. It will be 3'x1'x8". Should I use sand or p-gravel as a base?

Thanks guys,

notnow

P gravel at least. Maybe a heavier grade on the bottom. Sand would be too easily washed away. Just my thoughts.

diver-rig

If you can find it, ground concrete makes an awesome base.

select-fire

nothing... fill it up with concrete

roswellnative

I would just dig the edges a little deeper than the middle. It will settle better with a bell hole

love2shoot

What is the porch made of? Wood, block, ?

cbxjeff

love2shoot - concrete.

chiefr

If you use premixed sacks, you dont need to add anything. If you mix your own, use any gravel. I would never use sand and Portland without aggregate stone.

notnow

Can you cast it elsewhere then move it into place?

cbxjeff

chiefr, I should have been more clear. Yes, the job is small so I'll be using premix sacks. I want to know if I should use crushed rock or ? as a base under the concrete.

Butchdog2

Crushed stone if you are in a freezing area.

chiefr

https://forums.gunbroker.com/discussion/comment/11288809#Comment_11288809

I would not use stone under the premix because as it settles, the fine cement and sand will be leeched out into the crashed rock weakening it . Premixed concrete needs no additives.

I always use thick plastic or tar paper or even asphalt shingles as a base for steps, then the premix. Hope this helps,

asop

If there is a concern with this slab "heaving" in the winter months then use a crushed stone base. If your are not in a freezing area or don't care if it heaves it's make no difference.

love2shoot

Anchor it to the concrete porch as well?

cbxjeff

It will not be anchored to the porch love2shoot. I think I will go with crushed marble rock. I can get bags at my local Lowe's and will only need a couple. It looks to be around #53 or a little smaller in size.

Mr. Perfect

Build the forms, put the metal grid in, and call it ready.