What I did today

Getting ready to pour a ramp into the barn from the hay field. 12 x 12 square by 12 inches thick. Ordered 6 yards of crete. Got it on a slope so I can wash off equipment and it will drain to the field. I used # 5 bar on 12 inch centers approximately. Crete coming Tuesday at 9:30. I still need to complete the form, but am waiting for the mud to dry up a little. Ellis
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Should hold a Tank being 12 inches thick with that much rebar. Concrete is cheap when compared to a cracked up slab in the future. Good looking job!!!
 
Traditional farmer: What is the super plasticizer ?? and what does it exactly do??? I am far from a concrete man. I am more of a dump it in a fairly flat "pile" smooth it out and hope for the best. LOL
 
My SIL who studied Concrete in College, says that the water never leaves the concrete. Since the water does not leave but is trapped in the mix, it weakens the concrete. So one is supposed to add plasticizer instead of water to make the concrete easier to work.
 
Super plasticizer is a water reducer.
It allows the concrete to flow into unaccusable forms and improve workability without adding water.
Because of the reduced water it allows the concrete test cylinders to break at higher values quicker and at higher strength overall.

It is used a lot in building bridges where you pour concrete in pre cast yards to later be set as whole pieces with a crane at the job site.
 
What are you going to do with the 2/3rds of a yard that will be left over. Since you have time maybe make the pad another foot and half longer. You better add some kickers to that front form or push some dirt around it so it stays straight and square.also.
 
superplasticizer is a water reducing agent by making the concrete more slippery so it can be placed easily with less water---quite often used with a retarding densifer so you have more time to place it before it starts to set

And WOW!!! 12 inches thick?
 
May I make one suggestion? I would drill into the existing slab on 12" centers about 4-6" deep and drive 12" pieces of rebar into the holes to lock the 2 slabs together
 
Make sure you leave about a 2 inch step up to shed floor. Here in MN. frost will lift apron in winter then trapped water will freeze door down.
 
Going to be nice, you'll be glad you did it. Natural stone walls either side very impressive, I like the look. Crusher run gravel in front of my shop, big improvement over what was there.
 
I am like David, around here 6 inches of good concrete is considered more than adequate for something like an apron on a farm shop. That deal there should sure be there forever. This place is 1100 feet from the main highway and we have a 10 ft wide concrete drive, poured 4 inches thick on a real good stone base. Come in and out with 100 thousand lb loaded semis (On 26 tires) and after 9 years still no cracks. Guess a lot depends on how far north one is.
 
Add some kickers to the wood form. Two feet apart.

You have probably heard the saying - "No one will know if you have one too many kickers, but the whole neighborhood will know if you have one not enough".

Chalk a line for grade two inches below the shop floor grade. You can make a strike-off with a two inch notch and save some work.

I like your 5/8" bars on 12" centers - good job!
 
(quoted from post at 12:29:33 07/18/19) G

You said you aren't finished so I hope you add some felt along the rock walls and your shop slab to keep your slab from sticking to them. You want your slab to be able to move independent of the rock walls and your shop slab.
 
(quoted from post at 05:06:42 07/19/19) The reason I don't want to do that is because one slab is inside and one outside and freeze thaw will move them differently. Ellis

Freeze thaw will move them differently, which is the problem. Without felt, they're connected and may start to tear themselves up. If you damage the walls, you can rebuild them, but if you damage the shop slab, you'll have to live with the damage. At 12" you'd think there's no way it will crack, but it may. With the amount of steel you've used, it won't matter, but it will still upset you.
 

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