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outside Africa ? what is the oldest bow and arrow inside Africa? a proof of bow and arrow is hard to find, of course and why did these Neronians in France become extinct? was it because they were isolated and didn't interbreed with Neandethals, so inbreeding happened?

So, it seems to be a place where people started to settle after the youngest dryas, when the climate was improving again. I suppose population regrowth had started as well.

a PPNA site in Jordan

Gobekli Tepe is not the only site with T-shaped pilars in the area https://www.researchgate.net/publication/289819398_T-Shaped_Pillar_Sites_in_the_Landscape_around_Urfa they are designated to the PPN period however such stones are hard to date

they have a layer dated to PPNA but have they already investigated and dated the oldest layer of the complex?

what is this R-FTE1 ? is it Villabruna or something else?

it can change every year check this link : https://isogg.org/tree/

I doubt Cato, Vitruvius or Pliny ever mixed mortar themselves.

what is carbonation, and does it promote the infiltration of water into the encapsulated quicklime particle?

yes, I would guess so however the Roman engineers may have been smart enough to notice this effect and have kept the recipee I guess there are no written sources on this and this kind of knowledge was transferred from master to apprentice in practice

Thank you traveller. If I understand this correctly, it is a matter to controll the progress of the reaction of the quicklime with water. And at some point this reaction should be stopped, maybe by a shortage in moisture, so it can infiltrate and start again in the cracks when they become wet...

I don't need the paper, it is in the article itself. The reaction with quicklime is exotherm, which means it produces heat. Traveller knows a lot about this stuff, much more than me. He explained it perfectly in his post. You're the one talking about things you don't understand. And you consider...

Oh, you're teaching me a lesson, because I don't understand the article. Well, just tell me how the hot mixing was done. I'll give you a clue. Check my post #9. It tells how the heat was provoked. If you can't answer me, you're the one who can't read. Yes, I don't care about glorifying or not...

In this post I told I had only read diagonaly. I even added I guessed there was something more. I've done some further reading and made some more posts. Did you read all of my posts? If I'm wrong in my conclusion, just tell me. I don't know why you drag in de Bello Gallico, the Ligurians and WW II.

The properties of hardened blended cements are strongly related to the development of the binder microstructure, i.e., to the distribution, type, shape and dimensions of both reaction products and pores. The beneficial effects of pozzolan addition in terms of higher compressive strength...

Along with other new formulations, such as concrete that can actually absorb carbon dioxide from the air, another current research focus of the Masic lab, these improvements could help to reduce concrete?s global climate impact. There is allready a pilot production of such material in Belgium ...

I've only read it in diagonal but : This material can then react with water, creating a calcium-saturated solution, which can recrystallize as calcium carbonate and quickly fill the crack, or react with pozzolanic materials to further strengthen the composite material. These reactions take...

https://en.wikipedia.org/wiki/Pozzolan the name Pozzolan is derived from the Italian city Pozzuoli in the Bay of Naples this concrete would have formed naturaly under the sea level because of the local Volcanic activities I wonder why MIT comes up with this now, this was known long before ..

Roman structures are monumental concrete structures today are armed with iron in order to accomodate tensile stress constructions today are much lighter and bridge spans are much longer I don't think you should drive 10 ton trucks over the old aquaducts every day .. it would be nice though if...

https://www.ancient-origins.net/news-history-archaeology/cousins-married-0017806?fbclid=IwAR2i373q7w4gP_ZEGM2ShsHmNa1uj8vl1H_T6oiGG8Fj2FunC4lpwja3PG4