That doesn’t look very thick, Jim. Was that the runway or only a taxiway? I
ask because I’m fairly certain that the concrete at my old base, RAF Brüggen,
was probably twice as deep as that looks.
That mixer lorry looks very strange compared with ones that I’ve seen in the UK.
Chris
> On 18 Feb 2016, at 20:19, Jim Nichols <jhnichols@xxxxxxxxxxxxx> wrote:
>
> 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
> <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
> <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
> <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
> <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
> <http://www.gallery.leica-users.org/v/OldNick/Going+to+Reload+3165.tif.html>
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