| In the absence of surface dressing, dense bitumen macadam tends to polish and become dangerous. |
| The dense bitumen macadam surface, in the absence of any other dressing, tends to polish and became dangerous, particularly after rain. |
| The road surface was tarmacadam, a bitumen surface with a 14 mm aggregate close graded wearing course. |
| The solvents act to decrease the viscosity of the bitumen making it more workable. |
| Roof felts are essentially scrap paper bonded together with bitumen, a waste oil product that is put on the felt to saturate it. |
| It should never be forgotten that a steel wheel on a steel rail has one-seventh of the friction of a rubber-tyred wheel on a bitumen surface. |
