[Leica] IMG: Repair of WWII Concrete

[lluisripollphotography]

Well documented Jim! My favorite is this one

<http://www.gallery.leica-users.org/v/OldNick/Wash+Job+3161.tif.html>

Lluis





> El 18 febr 2016, a les 21:19, Jim Nichols <jhnichols at lighttube.net> va escriure:
> 
> I took a walk in the sunshine today at the local airport.  Felt good!
> 
> This airport was built during WWII as an US Army Air Force training base for B-24s, hence the concrete was very thick to withstand the wheel loads.  While much of it has held up well, places that received a lot of traffic have developed cracks.  A contractor has been hired to cut out these broken areas and replace them with new concrete.  ( It is interesting to me that, while concrete made today in our area uses crushed limestone as the aggregate, I have seen areas of the original pours that used creek gravel, including a few mussel shells, as the aggregate.)
> 
> This image gives an idea of the thickness of the original concrete.
> http://www.gallery.leica-users.org/v/OldNick/Thick+Concrete+3162.tif.html
> 
> To tie the new to the old, the old concrete is drilled and rebar is installed.
> http://www.gallery.leica-users.org/v/OldNick/Drilling+for+Rebar+3163.tif.html
> 
> About half of this section has been replaced, as the crews work with manageable pour sections.
> http://www.gallery.leica-users.org/v/OldNick/Working+Concrete+3157.tif.html
> 
> The rotating mixer drum must be washed out after each pour.
> http://www.gallery.leica-users.org/v/OldNick/Wash+Job+3161.tif.html
> 
> And then, the truck heads back to the plant for another load. Multiple trucks were in use, to keep the job moving at a workable pace.
> http://www.gallery.leica-users.org/v/OldNick/Going+to+Reload+3165.tif.html
> 
> Fuji X-E1 with Fujinon 35/2.0
> 
> Comments and critiques welcomed.
> 
> -- 
> Jim Nichols
> Tullahoma, TN USA
> 
> 
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