Yeah, the barrel of the mixer looks "arse about" compared to all I've seen in
Oz.
...Wayne
-----Original Message-----
From: olympus
[mailto:olympus-bounces+wayne.harridge=structuregraphs.com@xxxxxxxxxxxxxxxxx]
On Behalf Of ChrisB
Sent: Saturday, 20 February 2016 4:52 AM
To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
Subject: Re: [OM] IMG: Repair of WWII Concrete
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 Br�ggen,
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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