Archived posting to the Leica Users Group, 2016/02/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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