By James G. Speight

ISBN-10: 0128002735

ISBN-13: 9780128002735

ISBN-10: 0128005017

ISBN-13: 9780128005019

Asphalt is a fancy yet well known civil engineering fabric. layout engineers needs to comprehend those complexities to be able to optimize its use. even if it truly is used to pave a hectic road, water resistant a rooftop or gentle out an airport runway, Asphalt fabrics technology and expertise acquaints engineers with the problems and applied sciences surrounding the right kind choice and makes use of of asphalts. With this publication in hand, researchers and engineering will discover a worthy consultant to the construction, use and environmental element of asphalt.

  • Covers the Nomenclature and Terminology for Asphalt together with: functionality Graded (PG) Binders, Asphalt Cement (AC), Asphalt-Rubber (A-R) Binder, Asphalt Emulsion and Cutback Asphalt
  • Includes fabric choice issues, trying out, and applications
  • Biodegradation of Asphalt and environmental points of asphalt use

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Extra resources for Asphalt Materials Science and Technology

Sample text

However, the term tar sand is actually a misnomer; more correctly, the name tar is usually applied to the heavy product remaining after the destructive distillation of coal or other organic matter (Speight, 2013d). The term bitumen (also, on occasion, referred to as native asphalt, rock asphalt, and extra heavy oil, while in Europe and other countries the term bitumen often refers to road asphalt) includes a wide variety of reddishbrown to black materials of semisolid, viscous to brittle character that can exist in nature with no mineral impurity or with mineral matter (sandstone, limestone, or argillaceous sediments) contents that exceed 50% by weight (Abraham, 1945; Barth, 1962; Hoiberg, 1964).

It is considered a processed aggregate since crushing typically improves the particle shape by making the rounded particles more angular and crushing also improves the size distribution and range. Crushed stone is also a processed aggregate and is produced when the fragments of bedrock and large stones are crushed so that all particle faces are fractured and variation in particle size is achieved by screening. Aggregates that have received little or no screening are known as crusher run aggregate.

The 10–20 mm fraction is in demand for road construction and aggregates of this fraction are used for laying both asphalt and concrete roads. It is used as filler for sub-base preparation for the road surface. The 20–40 mm fraction is a medium fraction that is used for road construction as a lower layer beneath the asphalt surface. Aggregates of this fraction are also used as sub-bases in construction of highways and railways and in production of concrete and massive structures from reinforced concrete.

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Asphalt Materials Science and Technology by James G. Speight


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