When was the earliest use we know about for concrete?
No context provided
When was the earliest use we know about for regular concrete?
700 BC
"Asphalt concrete" (commonly called "asphalt", "blacktop", or "pavement" in North America, and "tarmac", "bitumen macadam", or "rolled asphalt" in the United Kingdom and the Republic of Ireland) is a composite material commonly used to surface roads, parking lots, airports, as well as the core of embankment dams. Asphalt mixtures have been used in pavement construction since the beginning of the twentieth century. It consists of mineral aggregate bound together with asphalt, laid in layers, and compacted. The process was refined and enhanced by Belgian inventor and U.S. immigrant Edward De Smedt.
When was the earliest use we know about for asphalt concrete?
twentieth century the twentieth century beginning of the twentieth century the beginning of the twentieth century
Concrete
Concrete
https://en.wikipedia.org/wiki/Concrete
Small-scale production of concrete-like materials was pioneered by the Nabatean traders who occupied and controlled a series of oases and developed a small empire in the regions of southern Syria and northern Jordan from the 4th century BC. They discovered the advantages of hydraulic lime, with some self-cementing properties, by 700 BC. They built kilns to supply mortar for the construction of rubble masonry houses, concrete floors, and underground waterproof cisterns. They kept the cisterns secret as these enabled the Nabataeans to thrive in the desert. Some of these structures survive to this day.
Concrete
The use of concrete and concrete-like materials dates back to 700 BC in what is now southern Syria and northern Jordan. Early concrete was used in the construction of houses, floors, and underground waterproof cisterns, some of which survive to this day. Asphalt concrete didn't come into use until the beginning of the twentieth century, and has since become widely used to surface roads, parking lots, and airports.