yes it is. it is one of many substances in a cigarette.
tar
It is in some places. These days asphalt and tar have apparently come to have the same meaning ;- A dark bituminous product from coal or petroleum ,used in surfacing roads.
In 1824, people first used tar on road construction. It was occurred in Paris, where people place tar blocks on Champs-ÌälysÌ©es of Paris. The modern tar roads are result from two Scottish engineers.
if we take one cigarette. You get this much Tar.
Tar
John Loudon McAdam, a Scottish road building expert, is credited with being the first to build tar surfaced roads. That is why they are called macadam roads.
Potholes are holes created in the road due to various stresses. On tar roads, the tar can expand and contract considerably during the summer and the winter. As a result of this constant contraction and expansion, parts of the road can erode away. During the winter, ice can also form in the pores in the tar road and the freezing of the ice expands the road slightly. Over days, weeks, and months of exposure to such stresses, tar roads break away at weak points and form potholes. Continued driving and application of the weight of multiple cars and trucks can also facilitate the road's destruction. The same can occur on concrete roads, although not as often as on tar roads.
Because the concrete will expand and the tar will become soft. So the concrete has room to expand. With out cracking.
Because the concrete will expand and the tar will become soft. So the concrete has room to expand. With out cracking.
J. Walker Smith has written: 'Dustless roads, tar macadam' -- subject(s): Macadamized Roads, Roads, Macadamized, Roads, Tarred, Tarred Roads
Bitumen is used in place of coal tar in making roads.
Roads are the black hard stuff on the ground for cars to drive on. Roads are made of tar. Tar is sticky black stuff that is made of tree skeletons.