Next Article in Journal
Urban Drainage Networks Rehabilitation Using Multi-Objective Model and Search Space Reduction Methodology
Next Article in Special Issue
Fiber Optics Sensors in Asphalt Pavement: State-of-the-Art Review
Previous Article in Journal
Ventilation of an Isolated Subsurface Structure Induced by Natural Forces
Previous Article in Special Issue
Determination of Layers Responsible for Rutting Failure in a Pavement Structure
Open AccessArticle

Sensitivity of the Flow Number to Mix Factors of Hot-Mix Asphalt

Department of Engineering Technology, Colorado State University, Pueblo, CO 81001, USA
*
Author to whom correspondence should be addressed.
Infrastructures 2019, 4(2), 34; https://doi.org/10.3390/infrastructures4020034
Received: 25 April 2019 / Revised: 31 May 2019 / Accepted: 4 June 2019 / Published: 7 June 2019
(This article belongs to the Special Issue Recent Advances and Future Trends in Pavement Engineering)
In the design of pavement infrastructure, the flow number is used to determine the suitability of a hot-mix asphalt mixture (HMA) to resist permanent deformation when used in flexible pavement. This study investigates the sensitivity of the flow numbers to the mix factors of eleven categories of HMAs used in flexible pavements. A total of 105 specimens were studied for these eleven categories of HMAs. For each category of asphalt mixture, the variations in flow number for different contractors, binder types, effective binder contents, air voids, voids in mineral aggregates, voids filled with asphalt, and asphalt contents were assessed statistically. The results show that the flow numbers for different types of HMA used in Colorado vary from 47 to 2272. The same mix may have statistically different flow numbers, regardless of the contractor. The flow number increases with increasing effective binder content, air voids, voids in mineral aggregates, voids filled with asphalt, and asphalt content in the study range of these parameters. View Full-Text
Keywords: hot-mix asphalt; flow number; effective binder content; air voids; voids in mineral aggregates; voids filled with asphalt; asphalt content hot-mix asphalt; flow number; effective binder content; air voids; voids in mineral aggregates; voids filled with asphalt; asphalt content
Show Figures

Graphical abstract

MDPI and ACS Style

Islam, M.R.; Kalevela, S.A.; Nesselhauf, S.K. Sensitivity of the Flow Number to Mix Factors of Hot-Mix Asphalt. Infrastructures 2019, 4, 34.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop