From: MajorTomThreepersons@yahoo.com   
      
   Historical Timeline of Concrete   
      
   9000 BC   
   Gobekli Tepe terrazzo floors (enclosure B layer III) and rectangular buildings   
   of layer II. Mesolithic to Neolithic type of concrete in Anatolia (western   
   Asia), constructed of burnt lime and clay, with aggregate.   
   6500 BC   
   Nabataean geopolymer type of Stone age concrete in Syria, permanent heating   
   and cooking fire pits. Primitive form of calcining on exterior faces of   
   limestone rocks lining the fire pits.   
   5600 BC   
   The earliest concrete yet discovered in Europe was developed along the Danube   
   River in Yugoslavia. Stone age hunters or fishermen mixed red lime, sand,   
   gravel and water.   
   4400 BC   
   Stonehenge builders mixed Ancient concrete, pulverized bluestone volcanic ash   
   and tuff (Pozzolan) together with crushed in situ Calcium carbonate (CaCO3)   
   lime.   
   3000 BC   
   Chinese used cementitious materials to hold bamboo together in their boats and   
   in the Great Wall. The Chinese used concrete in Gansu Province in northwest   
   China.   
   2500 BC   
   Egyptians mixed mud with straw to bind dried bricks. Also furthered the   
   discovery of lime and gypsum mortar as a binding agent for building the   
   Pyramids.   
   800 BC   
   Babylonians and Assyrians used a bitumen to bind stone and bricks. This   
   allowed them to combine both large and small stone objects together.   
   601 BC   
   Stonehenge Altar of Burnt Offering (containing 7 gold relics) Topfill, 0.6   
   meter of pulverized bluestone (volcanic ash and tuff) aggregate and lime, 3.7   
   meters Southeast of Heel Stone (above Anatolia's micaceous Altar Stone base.   
   600 BC   
   Greeks discovered a natural Pozzolan on Santorini Island that developed   
   hydraulic properties when mixed with lime. This made it possible to produce   
   concrete that would harden under water, as well as in the air.   
   400 BC   
   Petra (Greek, "city of rock"), also known as Sila, ancient city of Arabia (now   
   southwestern Jordan). The stronghold and treasure city of the Nabataeans, an   
   Arab people.   
   300 BC   
   Romans used slaked lime and volcanic ash (Pozzolan), found near Pozzouli,   
   Italy by the bay of Naples. Pliny the Elder reported a mortar mixture of 1   
   part lime to 4 parts sand. Vitruvius reported 2 parts of Pozzolan to 1 part   
   lime.   
   193 BC   
   Porticus Aemilia made of bound stones to form concrete.   
   75 BC   
   Romans use a pozzolanic, hydraulic cement to build the theater at Pompeii and   
   the Roman baths. The cement was a ground mix of lime and a volcanic ash   
   containing silica and alumina.   
   44 BC   
   Palatine Hill (Latin: Palatium), the centermost of the 7 hills of Rome, one of   
   the most ancient parts of the city of Rome, Italy. It is some 70 meters high.   
   25 BC   
   Ancient harbor at Caesarea, Israel built by Herod the Great.   
   AD 24   
   Stonehenge Altar of Burnt Offering (containing 7 gold relics) Backfill, 0.6   
   meter of pulverized bluestone (volcanic ash and tuff) aggregate and lime, 1.2   
   to 1.8 meters below Heel Stone base. Eastern bottom of Scroll Trench.   
      
   http://concretehelper.com/history-of-concrete/   
      
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