Construction experiences with volcanic unbound aggregates in road pavements

M. A. Franesqui*, F. Castelo Branco, M. C. Azevedo, P. Moita

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

    Abstract

    This experimental research discusses the performance of crushed granular materials resulting from volcanic rocks employed in the construction of subgrades and continuous grading unbound aggregate road base courses. Some frequent doubts related to their suitability for the aforementioned use, to their observance of the technical specifications of different countries, and to the methodology and criteria to control field compaction and bearing capacity are intended to be clarified. For this purpose some experiences of several Atlantic islands (Azores, Canary Islands, Cape Verde, Iceland) are compiled and additional recommendations are contributed for volcanic aggregates as those of Canaries or Azores. The experimental results reveal that it is possible to reach a good load-carrying capacity with these granular materials, and also that conventional tests can be used. The in-situ study has allowed us to obtain the rate of compaction as a function of the Effective Modulus of the base course foundation.

    Original languageEnglish
    Title of host publicationVolcanic rock mechanics
    Subtitle of host publicationrock mechanics and geo-engineering in volcanic environments
    EditorsClaudio Olalla, Luis E. Hernandez, Jose Antonio Rodriguez-Losada, Áurea Perucho, Javier González-Gallego
    Place of PublicationLondon
    PublisherCRC Press
    Pages241-247
    Number of pages7
    ISBN (Electronic)9780203842386
    ISBN (Print)9780415584784
    DOIs
    Publication statusPublished - 30 Jun 2017

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