Expansive characteristics of RAP materials for use as aggregates in the pavement substructure layers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper is focused on the expansive properties of reclaimed asphalt pavement (RAP) that may be used as pavement base materials in the state of Illinois. Different recycled hot mix asphalt materials were evaluated for use as aggregates in unbound pavement layers by assessing the differences in expansion potentials between recycled and virgin aggregates. Significant expansion levels have been found for RAP materials containing high percent of steel slag aggregates. This expansion has been attributable to hydration of the calcium and magnesium oxides in the recycled steel slag aggregate when exposed to water. The results of the expansion tests suggested the use of RAP materials containing high percentages of steel slag aggregates may have to be avoided in the pavement substructure layers depending upon the level of expansion.

Original languageEnglish (US)
Title of host publicationBearing Capacity of Roads, Railways and Airfields - Proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields
Pages1187-1196
Number of pages10
StatePublished - Dec 1 2009
Event8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCR2A'09 - Champaign, IL, United States
Duration: Jun 29 2009Jul 2 2009

Publication series

NameBearing Capacity of Roads, Railways and Airfields - Proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields
Volume2

Other

Other8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCR2A'09
CountryUnited States
CityChampaign, IL
Period6/29/097/2/09

ASJC Scopus subject areas

  • Civil and Structural Engineering

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  • Cite this

    Deniz, D., Tutumluer, E., & Popovics, J. S. (2009). Expansive characteristics of RAP materials for use as aggregates in the pavement substructure layers. In Bearing Capacity of Roads, Railways and Airfields - Proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields (pp. 1187-1196). (Bearing Capacity of Roads, Railways and Airfields - Proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields; Vol. 2).