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Posted by MiamiCuse on February 17, 2008, 11:08 am
> On Sat, 16 Feb 2008 23:15:08 -0500, "MiamiCuse"
>
>>I have a trench about 4; wide and 10' long in my slab that was opened up
>>for
>>plumbing drain relocation and now I am ready to close it up. I will put
>>the
>>sand back in and compact it real well, then termicide, then moisture
>>barrier, then I plan to add dowels to both sides of the existing slab and
>>pour new concrete.
>>
>>It is very difficult to do the dowels because the trench width it
>>irregular.
>>As I did the first two I started to think if I position the dowels
>>differently would it make the job easier and actually more effective?
>>
>>Instead of drilling holes on existing edges, why put the end of the dowel
>>at
>>the bottom of one slab, then pound it deep into the sand as far as it will
>>go at an incline, when the dowel is shortened to be about the same width
>>as
>>the trench, start pounding it down until it wedges into the existing
>>concrete on the other side. So basically the dowel will bridge the trench
>>from below one slab to the middle of another slab, sort of pushing up the
>>existing slab.
>>
>>If I continue this pattern, alternating the dowels say every 16 inches, I
>>will have an even number of dowels on each side, angled up. If I pour
>>concrete in and embed it into the new concrete, would it not be like
>>pretensioning it? Seems to me logically would hold the new concrete up
>>better...or am I nutz?
>>
>>MC
>>
>
>
> I think you are working too hard on this. Compact the dirt and pour in
> the patch using an acrylic patch mix that will bond to the old slab
> and be done with it. Use a low slump on the concrete and it won't
> shrink as much (less water) What kind of surface are you installing
> over this?
Ceramic tiles, a preslope for shower pan, more mortar on top of it and more
tiles. Thanks.
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