Actions for Utilization of Low-Quality Aggregates in Asphaltic Mixtures in the Eastern Province of Saudi Arabia

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Utilization of Low-Quality Aggregates in Asphaltic Mixtures in the Eastern Province of Saudi Arabia / A. Abdulshafi, MA. Al-Dhalaan

Conference Author
Implication of Aggregates in the Design, Construction, and Performance of Flexible Pavements (1986 : New Orleans, Louisiana)
Physical Description
1 online resource (15 pages) : illustrations, figures, tables
Additional Creators
Abdulshafi, A., Al-Dhalaan, MA., American Society for Testing and Materials, and ASTM International
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Summary
Utilization of low-quality aggregates in the eastern province of Saudi Arabia as well as in most Gulf areas is becoming a necessity. In this area, the definition of low-quality aggregates is more related to surface chemistry characteristics and salt content than to particle strength, porosity, surface texture, organic and fines or any other deficiency measures. Stripping, ravelling, and rutting are the major distress manifestations observed in asphaltic mixtures. Rutting is related to mix flow. Bleeding and shoving problems are also observed but to a lesser extent. One effective solution to the above is the cement coating of the coarse aggregate, thereby eliminating surface chemistry debonding behavior (stripping) and increasing the overall mixture stiffness. Several laboratory testing methods on aggregates (such as specific gravity, water absorption, abrasion, and soundness) and on asphaltic mixtures (such as stability, modulus of resilience, creep and rutting, fracture toughness, and index of retained strength) have been performed. Laboratory test results on cement-coated and uncoated aggregates as well as on their asphaltic mixtures clearly indicate the improvements obtained by cement coating technique. These improvements include more than 30% increase in Marshall stability with flow remaining within specification range, improved coating and resistance to stripping, increased tensile strength and resilient modulus, more than 90% immersion-tensile strength ratio, and increased fatigue life.
Dates of Publication and/or Sequential Designation
Volume 1989, Issue 1016 (January 1989)
Subject(s)
Other Subject(s)
ISBN
0803111932
9780803111936
9780803150775 (e-ISBN)
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 13.
Other Forms
Also available in PDF edition.
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1989. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
View MARC record | catkey: 27991414