Replies

1. 
   oops | Nov 23, 2011 05:53pm | #1

   control joints

   I'm no expert on the subject, but it is my understanding that if you don't cut them as soon a possible, it does not do any good to cut them.

   Some time back, I found a web site that was pretty thorough on the subject. You might try  http://www.concretenetwork.com

2. 
   calvin | Nov 23, 2011 06:05pm | #2

   I'm thinking the contrary

   Concrete will crack, you just help it decide to figure where.

   Cutting them now can't hurt and quite possibly might help down the road.

   Things such as what's in the slab as far as reinforcement might help also.  Going all the way that you can is a good idea, as if it does crack there, it'll then go toward the edge or corner (if inside corner).

   Any posts on footings in the slab?

1. 
   marlboroman | Nov 23, 2011 10:36pm | #3

   concrete

   It is a monolithic slab with a18x18 inch footing it has wire mesh in the slab section and half inch rebar in the footing section and is sitting on 12 inches of compacted1inch roadbase , also no post

3. 
   oops | Nov 23, 2011 11:08pm | #4

   what harm could it do?

   On the other hand, what good would it do?  The idea is to control where and how the cracks will occur. If you wait to long, you lose this control.  You may saw the control joints later, but the concrete may have decided where it is going to crack and you may or may not locate your control at these points. Now you may have cracks where there or no control joints and control joints where there are no cracks.  :>)

   This is discussed in the link that I posted above.

1. 
   calvin | Nov 24, 2011 05:45am | #5

   Link

   Could you provide another link to the discussion?

1. 
   oops | Nov 24, 2011 08:24pm | #7

   Misc.

   Et  TOO Calvin.  :>)

2. 
   DanH | Nov 24, 2011 08:18am | #6

   The thing is, you have no idea whether significant cracks may already have developed.

   One thing the OP can do is flood the area with water, then wait for it to dry.  The cracks will remain dark after the bulk of the water has dried out.  This will let him judge the degree to which cracking may already have occurred.

4. 
   calvin | Nov 25, 2011 12:38pm | #8

   oops

   The link you posted is to the general site, maybe you could post one on the "too late to cut" subject.  I hate hunting around.......especially on this borrowed computer.

   thanks

1. 
   oops | Nov 25, 2011 09:22pm | #9

   Calvin. Yeah, there is almost more info. than you want at the site. I went through it a found the info. Take a little doing, but try this.

   Go to the web site then click on the following:

   concrete driveways

   Concret driveway construction practices

   correctly placed joints

   Then click on the high lighted "control joints"

   Hope this helps.

   There may be a better way of doing this, but I know more about pouring concrete than operating a computer.

   Bruce 

1. 
   Piffin | Dec 06, 2011 08:08am | #11

   I suspect it is done now or not going to be. I would have cut them, like mike, same reasoning. How soon it cracks depends on a LOT of variables that none of us here knows

   I could not find that article by that means, ran a term search and got lots listed. Can youchoose it from one of these?

   http://www.concretenetwork.com/search.aspx?q=%22control+joints%22&x=25&y=9

5. 
   DanH | Nov 25, 2011 11:38pm | #10

   Or, like I suggested, flood it with water to see what, if any, cracks have developed.