Very true For the most part the knowledge was misplaced with the fall of said empire.
For over a millennia after, lime mortars were the main “cement” but was not “hydraulic” (set under water) like the original Roman cement. Very important when building harbors. More modern cements originate from work by Aspdin (sp) from Leeds in the early 1800s. Advances in kiln technology (rotary) in the end of the 1800s and early 1900’s is what led to wider acceptance. The ability to manufacture cement is heavily dependent on the development of machine tools to produce the equipment needed. Full circle On Tue, May 23, 2023 at 6:41 PM Scott Harwell via Emc-users < emc-users@lists.sourceforge.net> wrote: > Practical concrete was created by the Romans and in use from around > 600BCE. > > Scott > > > On Monday, May 22, 2023 at 05:37:46 PM CDT, BRIAN GLACKIN < > glackin.br...@gmail.com> wrote: > > Thanks Andy > > The articles I knew of were of much more recent vintage. > > This article confirms the design was originally for “shell” lathes where > they could manufacture a lathe in place and have it operational in 30ish > days. I was surprised it was WW1 as the cement technology at the time was > rapidly evolving. > > By > > On Mon, May 22, 2023 at 4:28 AM andy pugh <bodge...@gmail.com> wrote: > > > On Sun, 21 May 2023 at 23:57, BRIAN GLACKIN <glackin.br...@gmail.com> > > wrote: > > > > > During ww2 they made lathes bodies out of concrete with imbedded steel > > > parts that were jigged in form or line bored for the spindle and tail > > > stock. > > > > More info here: > > > > > https://flowxrgdotcom.files.wordpress.com/2011/07/new-method-of-building-lathes.pdf > > > > (and it was actually WW1, the article is from1916) > > > > -- > > atp > > "A motorcycle is a bicycle with a pandemonium attachment and is > > designed for the especial use of mechanical geniuses, daredevils and > > lunatics." > > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
