IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v12y2020i20p8612-d430580.html
   My bibliography  Save this article

Ageing and Cooling of Hot-Mix-Asphalt during Hauling and Paving—A Laboratory and Site Study

Author

Listed:
  • Edoardo Bocci

    (Faculty of Engineering, Università degli Studi eCampus, 22060 Novedrate, Italy)

  • Emiliano Prosperi

    (Department of Construction, Civil Engineering and Architecture, Università Politecnica delle Marche, 60131 Ancona, Italy)

  • Volkmar Mair

    (Ufficio Geologia e Prove Materiali, Autonomous Province of Bolzano, 39053 Cardano, Italy)

  • Maurizio Bocci

    (Department of Construction, Civil Engineering and Architecture, Università Politecnica delle Marche, 60131 Ancona, Italy)

Abstract

In road construction, it can happen that, for different reasons, the time between hot-mix asphalt (HMA) production and paving is extended to some hours. This can be reflected in several problems such as mix cooling and temperature segregation, but also in an extremely severe bitumen ageing due to its prolonged exposure to high temperatures. This paper deals with the investigation of these phenomena both in the laboratory and on site. In particular, the first part of the research aimed at observing the influence of the conditioning time, when the loose HMA is kept in the oven at a high temperature, on the mix properties. The second part focused on the ageing/cooling that happens on site during HMA hauling, as a function of time and type of truck. Temperatures were monitored using a thermal camera and different probes, and gyratory compactor specimens were produced by sampling some HMA from the trucks every 1 h for 3 h. The results showed that HMA stiffness rises if the time when the loose mix stays in the laboratory oven before compaction increases. However, on site, the HMA volumetric and mechanical properties do not change with hauling time up to 3 h, probably because the external material in the truck bed protects the HMA core from the access of oxygen, hindering bitumen oxidation and loss of volatiles. The temperature monitoring highlighted that temperature segregation, after 3 h hauling, can be higher than 30 °C but it can be reduced using insulated truck beds.

Suggested Citation

  • Edoardo Bocci & Emiliano Prosperi & Volkmar Mair & Maurizio Bocci, 2020. "Ageing and Cooling of Hot-Mix-Asphalt during Hauling and Paving—A Laboratory and Site Study," Sustainability, MDPI, vol. 12(20), pages 1-17, October.
  • Handle: RePEc:gam:jsusta:v:12:y:2020:i:20:p:8612-:d:430580
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/12/20/8612/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/2071-1050/12/20/8612/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Emiliano Prosperi & Edoardo Bocci & Maurizio Bocci, 2022. "Effect of Bitumen Production Process and Mix Heating Temperature on the Rheological Properties of Hot Recycled Mix Asphalt," Sustainability, MDPI, vol. 14(15), pages 1-21, August.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:12:y:2020:i:20:p:8612-:d:430580. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.