Definition It may be defined as a solid or semi-solid, black, sticky, ductile substance, obtained as an important byproduct from the distillation of crude petroleum. It may also be defined as that portion of petroleum asphalt and tar products, which will dissolve in carbon disulphide. Bitumen implies a group of hydrocarbons often mixed with some organic matter.Bitumen is known as petroleum in the fluid state, mineral tar in the semi-fluid state and asphalt in the solid stale. In natural state bitumen is found in combination with finely graded mineral matter in the form of natural asphalt. The two terms asphalt and bitumen are used synonymously. The former is natural product whereas the latter is the refined product. Properties of Bitumen Following pie the properties of bitumen:
1- It is characteristically solid or semi-solid, black and sticky.
2- It melts or softens on application of heat.
3- Its specific gravity is 1.09.
4- It is completely soluble in carbon disulphide.
5- It is a binder in all types of asphalt.
6- It possesses great chemical stability, but is affected by oil.
7- It has low permittivity and high insulation resistance
Uses of Bitumen Following are the uses of bitumen:
1- It is used as a dam proof course in walls and under basements and in lining tanks, swimming pool etc.
2- Since it forms good expansion joint therefore, it is used for filling up the joints in leaky roofs. It is being expensively used as a road making material.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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