Castra Of Bumbești-Jiu – Gară
The castra of Bumbești-Jiu now known as Gară was a castra, fort in the Roman province of Roman Dacia, Dacia located in Bumbești-Jiu (Romania). It replaced the nearby earlier fort of Castra of Bumbești-Jiu – Vârtop in the 2nd century AD. It defended and secured the entrance to the Jiului gorge and the Roman road from Bumbești through Porceni over the mountains, through the Vâlcan Pass to Sarmisegetuza. A contemporary settlement was also unearthed at the fort. See also *List of castra#Dacia, List of castra External linksRoman castra from Romania - Google MapsEarthCastrele romane de la Bumbești Jiu, cea mai simplă soluție pentru dezvoltarea orașului Notes

{{DEFAULTSORT:Castra of Bumbesti-Jiu - Gara Roman auxiliary forts in Romania History of Oltenia Historic monuments in Gorj County ...
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Opus Caementicium
Roman concrete, also called , was used in construction in ancient Rome. Like its modern equivalent, Roman concrete was based on a hydraulic-setting cement added to an aggregate. Many buildings and structures still standing today, such as bridges, reservoirs and aqueducts, were built with this material, which attests to both its versatility and its durability. Its strength was sometimes enhanced by the incorporation of pozzolanic ash where available (particularly in the Bay of Naples). The addition of ash prevented cracks from spreading. Recent research has shown that the incorporation of mixtures of different types of lime, forming conglomerate "clasts" allowed the concrete to self-repair cracks. Roman concrete was in widespread use from about 150 BC; some scholars believe it was developed a century before that. It was often used in combination with facings and other supports, and interiors were further decorated by stucco, fresco paintings, or coloured marble. Further inn ...
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