Aggregate Quality Requirements for Pavements (2018) / Chapter Skim
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Pages 77-80
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From page 77... ...
77 6.1 Objectives and Scope of Synthesis Study The primary objective of this synthesis was to gather the latest information and present current practices implemented by transportation agencies related to aggregate quality requirements for pavements. The most recent and relevant research findings on the sources and types of aggregates influencing quality were gathered.
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From page 78... ...
78 Aggregate Quality Requirements for Pavements • Uniform practice does not exist among different agencies regarding the use of RAP, RCA, SFS, and BFS in pavement construction. Furthermore, transportation agencies follow different restrictions considering quality concerns for using recycled and artificial aggregates.
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From page 79... ...
Conclusions 79 were investigated. Aggregate quality requirements published by different transportation agencies were reviewed, with a special focus on practices or criteria put in place to classify different aggregate types and sources including coarse and fine virgin aggregates.
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From page 80... ...
80 Aggregate Quality Requirements for Pavements • The use of high percentages of RAP was reported by the survey responding agencies to have caused premature asphalt cracking. Also, the use of RCA in pavement layer applications was offered as a possible cause of high pH and leaching issues.
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