Re:Clearing the Air
by ekianjo on Sunday June 08, 2014 @11:42PM
(#7866890)
> As you can see, asphalt has a hardness of 1.3, copper has a hardness of 3, iron and nickel have a hardness of 4, and steel falls between 4 and 4.5. As you get closer to diamond, you finally come to glass, which has a hardness of 5.5-6.0. So if anyone tries to tell you that glass is soft, just remind them that even simple window glass is harder than steel. By comparison, it's asphalt that is soft.
Haha, this reply on that particular point is a joke. On the contrary you WANT asphalt to be soft, not hard on the road, because asphalt needs to be elastic. When a large truck goes on your road, you need the asphalt to show elasticity so that it can carry such weight and come back to its former state. Tensile strength and Ultimate tensile strength are the actual parameters you want to look it for such road materials and certainly not hardness. The harder your surface, the most prone it is to break when facing heavy tensions/forces.
Haha, this reply on that particular point is a joke. On the contrary you WANT asphalt to be soft, not hard on the road, because asphalt needs to be elastic. When a large truck goes on your road, you need the asphalt to show elasticity so that it can carry such weight and come back to its former state. Tensile strength and Ultimate tensile strength are the actual parameters you want to look it for such road materials and certainly not hardness. The harder your surface, the most prone it is to break when facing heavy tensions/forces.