how is tarmac made?

Answer 1

Tar and aggregate (aggregate being various sized stones). The 'mac' part is the how the stones are laid.

Answer 2

When it was originally made, tarmac was formed from a combination of tar, portland cement, resin and pitch. It was actually the brainchild of Purnell Hooley, but the process was refined and commercialised by Sir Alfred Hickman in 1905. In recent years, the advent of petroleum products have seen a favouring of asphalt over the macadam construction process. Asphalt is composed almost entirely of bitumen, the residual level of crude oil that remains after distillation.

Answer 3

Originally natural tar, bitumen and pitch, was mixed with aggregate was applied, then rolled, over a Macadamized road, hence, Tar Mac. The macadamized road is named after John Loudon McAdam, thee British engineer, who patented the process, and first applied it to a highway in 1816. His improved roads got rid of the annual quagmire, which were experienced with previous roads. Britain's new roads were passable all year, and, required much less maintenance. The British Empire, then the rest of the world quickly adopted this revolutionary process. The first use in the US was in the 1830's, with the modernization of the National Road.

Answer 4

Tarmac' made from gravel and tar was a fairly durable material, but `tarmac' made from granite and blast furnace slag was known to be much stronger

Answer 5

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RE:
how is tarmac made?

Answer 6

With tar and gravel

Answer 7

small pebbles mixed with molten bitumen

Answer 8

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