Archived posting to the Leica Users Group, 2016/02/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information