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Unread 03-11-2007, 05:11 PM   #1
Hamhanded
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Concrete Step Questions

I hope someone can offer some advice about adding concrete steps around a raised concrete entryway foyer. I will be laying porcelain tile over the completed structure.

Our front door entryway is a rectangular concrete block poured on top of the slab. I attached a drawing/sketch to explain the structure. There are presently no steps leading down to the slab grade from the sides of the entryway - only railings to prevent an 18" drop. I very much want to remove the railings and add concrete steps in these directions. The new steps are shown dashed.

I am not sure what should be done to make sure the new concrete is strucurally sound and bonds/stays flush with the old concrete. I much hope someone can suggest the size and amount of aggregate, whether wire mesh is a good idea inside the pour, if I should use some kind of bonding agent to join the new and old concrete, and whether I should drill/install rebar rods from the existing concrete into the new pour.

I very appreciate any advice.

Ham
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Unread 03-11-2007, 05:43 PM   #2
John Bridge
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Hi Ham,

I would use 1/2 in. rebar instead of mesh. You can "dowel" into the existing concrete. That means to drill holes and cement short lengths of rebar into the holes and let them extend into the new pour. Then tie the rest of your rebar to them. You will still have a cold joint that will be treated as an expansion joint.

Gravity will keep everything in place. I would order 3,000 lb ready-mix for the pour.
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Unread 03-11-2007, 07:42 PM   #3
lavrans
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There are chemical bonders (http://www.symons.com/products/techd...xyBonderMV.pdf) that you can use, also. I wouldn't worry about them in this type of application though, just dowelling in rebar should be enough- dowell into both horizontal and vertical surfaces & you'll be fine.
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Unread 03-12-2007, 11:34 AM   #4
Hamhanded
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Many Thanks

Thanks so much for the help and advice. Changing the entryway foyer has been my goal since we moved into the house 5 years ago. My wife finally gave in and said Ok.

Ham
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Unread 03-25-2007, 02:17 PM   #5
Hamhanded
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Concrete Cure Time Before Tiling

Does anyone have recomendations on the time I should allow concrete steps to cure before tiling over them.

I used pumped ready mix concrete for the two tier steps. We are having typical SoCal inland valley weather of 75F day / 45 - 55F nite and low humidity. It will probably be this way for the next several weeks.

Ham
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Unread 03-25-2007, 03:01 PM   #6
jay f
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28 days.
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Unread 03-25-2007, 03:10 PM   #7
flatfloor
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Keep them wet, prevents curing too rapidly and the resultant cracks.
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Unread 03-25-2007, 11:47 PM   #8
Hamhanded
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Thanks Again

Thanks for everyone's advice. I will keep the steps moist.

I wish the answer would been a bit shorter than 28 days, but after waiting 5 years for the project i can cool my heels for a month.

ham
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