R
Roger Roberts
Researcher at Geophysical Survey
Publications - 18
Citations - 426
Roger Roberts is an academic researcher from Geophysical Survey. The author has contributed to research in topics: Ballast & Track (rail transport). The author has an hindex of 12, co-authored 18 publications receiving 379 citations. Previous affiliations of Roger Roberts include University of Illinois at Urbana–Champaign.
Papers
More filters
Journal ArticleDOI
Scattering analysis of ground-penetrating radar data to quantify railroad ballast contamination
TL;DR: In this article, a ground-penetrating radar (GPR) survey with multiple sets of 1 and 2 GHz air-horn antennae was conducted at the Transportation Technology Center, Inc. (TTCI) in Pueblo, Colorado.
Journal ArticleDOI
Data Analysis Techniques for GPR Used for Assessing Railroad Ballast in High Radio-Frequency Environment
Imad L. Al-Qadi,Imad L. Al-Qadi,Wei Xie,Wei Xie,Roger Roberts,Roger Roberts,Zhen Leng,Zhen Leng +7 more
TL;DR: In this paper, a field survey using multiple sets of 2-GHz air-horn antennae was conducted during summer 2007 at the Transportation Technology Center, Inc. in Pueblo, Colo.
Railroad Ballast Fouling Detection Using Ground Penetrating Radar - A New Approach Based on Scattering from Voids
TL;DR: In this article, the authors used ground penetrating radar (GPR) data to detect fouled railroad ballast and found that the data from fouled ballast contained minimal scattering from the remaining void space, which is a severe handicap when obtaining data on a ballast structure which contains gradational fouling.
Journal ArticleDOI
Optimization of antenna configuration in multiple-frequency ground penetrating radar system for railroad substructure assessment
TL;DR: In this article, a multiple-frequency ground penetrating radar (GPR) system was used to assess railroad track substructure conditions, especially ballast, in order to overcome the limited electromagnetic waves penetration for high frequency antennae and the low resolution of low-frequency antennae.
Journal ArticleDOI
NDE methods for quality assurance of new pavement thickness
TL;DR: In this paper, the authors demonstrate the use of non-destructive evaluation (NDE) methods for rapidly determining the average pavement thickness on a newly constructed section to within 2.5mm of the true value, without extensive reliance on cores.