Lecture No

Lecture No - Al-Mustansiriya University College of...

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Al-Mustansiriya University College of Engineering - Highway & Transportation Dept. Asphalt Technology Dr .Abdulhaq Hadi Abed Ali ١ Page No. Page No. Definitions - Bitumen’s (Pitch and tumen ):- Mixtures of hydrocarbons of natural or pyrogeneous origin or combinations of both (liquid, semisolid or solid and which are completely soluble in carbon disulfide. نﯾﻣوﺗﯾﺑﻟا : - ﺔﯾزﺎﻏ نوﻛﺗ دﻗو ﺔﯾزﻠﻓﻼﻟا تﺎﻘﺗﺷﻣﻟا ضﻌﺑ ﻰﻠﻋ يوﺗﺣﺗ ﺔﯾﻧوﺑرﺎﻛوردﯾھ داوﻣ نﻣ طﯾﻠﺧ ، ± ² ³ ، ﺔﺑﻠﺻ وا ﺔﺑﻼﺻﻟا ﺔط´وﺗﻣ نوﺑرﺎﻛﻟا زوﺗﯾرﺑﻛ ﻲﻧﺎﺛ ضﻣﺎﺣ ﻲﻓ ﺎﯾﻠﻛ بوذﺗ و . - Asphalt (Asfalton or Asfaltos):- Sticky materials a dark brown to black cementations material, solid or semisolid in consistency based on temperature تﻠﻔﺳﻻا : - ﻟا ﺔﯾﻧﺑ ةدﺎﻣ نﯾﻣوﺗﯾﺑ ﺎﮭﻣظﻌﻣ نﯾﺧµﺗﻟا دﻧﻋ ﺔﻠﺋﺎ¶ ﺢﺑﺻﺗ ةدﯾﺟ ﺔطﺑار ةدﺎﻣﻛ مدﺧﺗ·ﺗ ﺔﺑﻠﺻ فﺻﻧ وا ﺔﺑﻠﺻ ءادو¸ وا نوﻠ ﺔﻌﯾﺑطﻟا نﻣ وا مﺎﺧﻟا طﻔﻧﻟا رﯾرﻛﺗﺑ ﺎﮭﯾﻠﻋ لﺻﺣﻧو . Historical Background - Asphalt is oldest engineering material; its adhesive and water proofing properties - Approximate analysis for a specimen of bitumen from foundation boxes of Iraq shows: [Ash 52.5%, soluble in benzene 9.3%, organic material & moisture 35.2%] the residue soluble in benzene (86 c o ) paraffin naphtha 25.7%. - Egyptians as a water proofing material for embalming in king Merenere , s me (2568-B.C) - A small asphalt re f nery was opera ± ng in 1864, in Sargent Field California. Classification or Source of Asphalt Asphalt is found in widely parts of the world in one or another of the following forms:- 1- Natural Asphalts (Solid Bitumen):- laid down in geologic strata (layers) and occurring both as soft or hard bitumen material and also as friable, black bitumen in veins of rock. a- Bitumen with inorganic impuri ² es (50-57% bitumen + colloidal clay + some inert organic matter). b- Cuban (20-90% purity CS 2 ) c- Bermudez (85-92% purity CS 2 ) d- Rock asphalts e- Asphaltities [ without impurities (silts, clays, salts) such as; 1- Gilsonite – black, bri ³ le, hard bitumen of various so ´ ening point < 250 F o , soluble in carbon disulfide. 2- Grahamite hard, brittle material of higher softening point Gilsonite, soluble in carbon disulfide. 3- Glance pitch (ManJak) – 80 – 90% soluble with variable so µ ening points 350 F o 4- Subgroup (Pyrobitumen)- These materials show no softening point but intumesce on heating ١ Lecture No. PDF created with pdfFactory Pro trial version www.pdffactory.com
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Al-Mustansiriya University College of Engineering - Highway & Transportation Dept.
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This note was uploaded on 11/25/2010 for the course ENGR 2 taught by Professor Drabdulhaq during the Spring '10 term at Chatt Tech.

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Lecture No - Al-Mustansiriya University College of...

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