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Bituminuous Plastic

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Published in: Chemical | Chemistry
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Bituminous Plastic - Application for the betterment of society.

Suranjana M / Aurangabad

19 years of teaching experience

Qualification: M.Tech (IIT,Kharagpur - 2000)

Teaches: Science, Chemistry

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  1. Maharashtra Institute of Technology, Aurangabad Affiliated to Dr. Babasaheb Ambedkar Marathwada University Aurangabad Course: Polymeric Materials-I T. Y. B. Tech. (Plastic and Polymer Engineering) Semester-V
  2. Unit-VI Natural Resins Bituminuous Plastic References: https://www.youtube.com/watch?v=ink508skDns (Polymer Modified Bitumen by Dr Sangita Senior Scientist, CRRI, New Delhi) Plastics Materials, J. Brydson, 7th Edition https://www.youtube.com/watch?v=gGYRmjOAHeo (bitumen) http://www.asphalt.com.au/why-asphalt/bitumen-vs-asphalt/ https://nptel.ac.in/courses/105101087/downloads/Lec-23.pdf (about Bitumen) https://www.slideshare.net/nitesnitw/polymer-modified-bitumen (Polymer modified Bitumen) https://www.youtube.com/watch?v=Sj FZduqblo ( Plastic Roads) https://www.youtube.com/watch?v=vSlJhSAotXo(POLYMER MODIFIED BITUMEN)
  3. Bitumens A number of types of bituminous material exist and terminology is still somewhat confusing. The term bitumens in its widest sense includes liquid and solid hydrocarbons but its popular meaning is restricted to the solid and semisolid materials. The bitumens occur widely in nature and may be considered to be derived from petroleum either by evaporation of the lighter fraction under atmospheric conditions or by a deeper seated metamorphism. The purer native bitumens are generally known as asphaltites and include Gilsonite, extensively used for moulding. Asphalt, also known as bitumen, is a sticky, black, and highly viscous liquid or semi-solid form of petroleum. It may be found in natural deposits or may be a refined product, and is classed as a pitch.
  4. Bitumens The bitumens are complex mixtures of paraffinic, and naphthenic aromatic hydrocarbons. A small amount of unsaturation is usually present which accounts for the slow oxidation which occurs on exposure to ultra violet light and the ability to bring about a form of vulcanisation on heating with sulphur.
  5. Bitumens- Properties and Applications The bulk of bituminous materials are used for road making and building applications. Only a very small percentage is used in moulding compositions and few data have been made publicly available concerning the properties of these compositions. Bitumens have a good order of chemical corrosion resistance, have reasonably good electrical insulation properties and are very cheap. Their main disadvantages are their black colour and their somewhat brittle nature.
  6. Bitumens- Properties and Applications ' Moulding compositions contain a number of ingredients. These may include: ' (1) Bituminous binder. ' (2) Fibrous filler. ' (3) Inert filler. (4) Softener, ' (5) Drying oil and drier
  7. Bitumens- Properties and Applications Of the fibrous fillers which greatly reduce the brittleness, blue asbestos fibre is normally used for battery boxes, the principal outlet. Other materials that may be used include cotton fibres, ground wood, slag wool and ground cork. Mineral fibres are incorporated to reduce cost and to raise the softening point. China clay, natural silicas, talc and used. ' To facilitate moulding a softener is include soft industrial pitches or indene resins or waxes. slate dust are frequently incorporated. These may heavy tars, coumarone-
  8. Bitumen — Mouldings The compositions are mixed in heated trough mixers, the mixing temperature being in the range of 150-2000C. Skill is required in order to achieve good dispersion of the fibrous filler without charring the butuminous matter. Moulding is carried in compression moulds using prewarmed doughs. For battery boxes the mould temperature on charging the composition is about 1000C, which is reduced to at least 500C before extraction of the moulding. Some simple mouldings can be carried out using prewarmed mixes but cold moulds. The largest outlet for the bituminous plastics has been for automobile battery boxes. Bituminous battery boxes do, however, have a susceptibility to electrical breakdown between the cells and in Europe their use has been mainly confined to the cheaper batteries installed initially in new cars. Bituminous compositions have also been used for toilet cisterns and to some extent for cheap containers. They are no longer important.
  9. Asphalt Where the bitumens are associated with mineral matter the mixture is referred to as native asphalt These are widely distributed in nature, the best known deposit being the asphalt lake in Trinidad which covers an area of about 100 acres (40 hectares). The terms asphalt or asphaltic bitumen are applied to petroleum distillation residues and these today form the bulk of commercial bituminous matter.
  10. What's the difference between Bitumen and Asphalt? Bitumen is actually the liquid binder that holds asphalt together. The term bitumen is often mistakenly used to describe asphalt. A bitumen-sealed road has a layer of bitumen sprayed and then covered with an aggregate. This is then repeated to give a two-coat seal. Asphalt is produced in a plant that heats, dries and mixes aggregate, bitumen and sand into a composite mix. It is then applied through a paving machine on site as a solid material at a nominated or required thickness, relative to the end use. Asphalt results in a smoother and more durable surface than a bitumen-sealed road.

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