Sidewalk Pour
 
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Old 05-20-2009, 10:32 AM   #1
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Sidewalk Pour

I'm pouring about 1/2 yards of concrete replacing a sidewalk piece. Do I have to put some material between the new concrete and the old concrete sidewalk so the stuff affixes to the old properly or just pour the concrete in?

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Old 05-20-2009, 10:39 AM   #2
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Re: Sidewalk Pour

you could drill into the edges of the old walk and grout in some rebar or you could just pour in the new
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Old 05-20-2009, 11:13 AM   #3
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Re: Sidewalk Pour

Like nap said, I would pin them.
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Old 05-20-2009, 12:34 PM   #4
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Re: Sidewalk Pour

If you decide not to pin it, which would be best, At least make sure to paint the existing edge with a good wet slurry mix just prior to the pour. , you could also get in tight with a grinder and rough up the existing edge. G
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Old 05-20-2009, 01:14 PM   #5
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Re: Sidewalk Pour

Install rebar like stated and a paint a bonding agent on the old concrete
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Old 05-20-2009, 03:53 PM   #6
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Re: Sidewalk Pour

You guys do it different. We don't put steel in our sidewalks unless they cross a drivepad. Here we would just finish a control joint at each end or put an expansion at one end and a control joint at the other end.
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Old 05-20-2009, 05:52 PM   #7
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Re: Sidewalk Pour

I have never doweled sidewalk... expansion joint is all you need.. for four foot walk i cut control joints every 4 feet. dowels are mainly for transferring a load from one slab to another.. sidewalk dont carry this kind of load.
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Old 05-20-2009, 06:58 PM   #8
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Re: Sidewalk Pour

if your not tying into an existing sidewalk, no need to dowel just pour it solid. saw-cut your joints 1/4th the thickness of your slab within 4 to 12 hours of your pour. every 4' to 6' will control cracking. Be sure to edge the slab & use a broom finish.
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Old 05-20-2009, 11:04 PM   #9
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Re: Sidewalk Pour

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Originally Posted by superdawg51 View Post
if your not tying into an existing sidewalk, no need to dowel just pour it solid. saw-cut your joints 1/4th the thickness of your slab within 4 to 12 hours of your pour. every 4' to 6' will control cracking. Be sure to edge the slab & use a broom finish.
I think you saw cut control joints. expansion is not controlled by saw cuts. if your pouring between two pieces of concrete you need to put expansion joints in... around here you need them every thirty feet
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Old 05-21-2009, 12:57 AM   #10
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Re: Sidewalk Pour

Thom and master of none are correct. expasion joint is all that is needed. if you don't want to look of EJ then use a cap on the EJ. Tear the cap off and use caulk. Not painters caulk either.
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Old 05-21-2009, 10:03 AM   #11
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Re: Sidewalk Pour

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Originally Posted by master of none View Post
dowels are mainly for transferring a load from one slab to another.. sidewalk dont carry this kind of load.
Up here in snow land, frost will toss a small floating slab like that all over the place.

There is a very good chance that a slab like that without being pinned would be heaved after one winter and then the joints are tripping hazards.
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Old 05-21-2009, 11:26 AM   #12
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Re: Sidewalk Pour

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Originally Posted by shanekw1 View Post
Up here in snow land, frost will toss a small floating slab like that all over the place.

There is a very good chance that a slab like that without being pinned would be heaved after one winter and then the joints are tripping hazards.
If its not pinned and tied together with rebar in DC they would steal the sidewalk
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Old 05-21-2009, 11:28 AM   #13
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Re: Sidewalk Pour

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If its not pinned and tied together with rebar in DC they would steal the sidewalk
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Old 05-21-2009, 11:37 AM   #14
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Re: Sidewalk Pour

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If its not pinned and tied together with rebar in DC they would steal the sidewalk
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