Open-graded aggregate base (OGAB) controlling subsurface moisture regime and structural stability from MnROAD instrumentation data

Yuanjie Xiao, Erol Tutumluer, W. James Wilde

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

Abstract

Open-graded aggregate base courses have been increasingly used in Portland cement concrete (PCC) pavements as one of the effective strategies for improving subsurface drainage efficiency and thus pavement longevity. In addition to maintaining adequate permeability, these layers are also required to remain stable during pavement construction, performance period and future rehabilitation activities. In an effort to study subsurface drainage and stability of a new open-graded aggregate base material (OGAB Special) under construction, PCC pavement test sections (Cells 306 and 406) were constructed by the Minnesota Department of Transportation (MnDOT) on the 3.5-mile mainline interstate roadway segment at the MnROAD test facility in 2011. Both test cells consist of 6-in. thick PCC slab, 6-in. thick OGAB Special layer and 7-in. Class 5 (MnDOT traditional dense-graded) unbound aggregate underlain by clay subgrade. This paper presents the findings from analyzing field instrumentation data and Falling Weight Deflectometer (FWD) test results to assess the effectiveness of the OGAB Special layer in controlling subsurface moisture regime and providing structural stability. For comparison, field test data were also collected and analyzed from MnROAD Cells 38, 53, and 54 that are located in the low-volume roadway segment and consist of PCC slabs of similar thickness and traditional dense-graded base layers (Class 5 or 6) underlain by clay subgrade. It was concluded from analysis results that the OGAB Special layer cannot only reduce the subsurface moisture content significantly but also provide comparable structural stability, as compared to traditional dense-graded (Class 5/6) base layers.

Original languageEnglish (US)
Title of host publicationT and DI Congress 2014
Subtitle of host publicationPlanes, Trains, and Automobiles - Proceedings of the 2nd Transportation and Development Institute Congress
EditorsGeoffrey D. Gosling, Amiy Varma
PublisherAmerican Society of Civil Engineers (ASCE)
Pages1-13
Number of pages13
ISBN (Electronic)9780784413586
StatePublished - Jan 1 2014
Event2nd Transportation and Development Institute Congress - Planes, Trains, and Automobiles: Connections to Future Developments, T and DI 2014 - Orlando, United States
Duration: Jun 8 2014Jun 11 2014

Publication series

NameT and DI Congress 2014: Planes, Trains, and Automobiles - Proceedings of the 2nd Transportation and Development Institute Congress

Other

Other2nd Transportation and Development Institute Congress - Planes, Trains, and Automobiles: Connections to Future Developments, T and DI 2014
CountryUnited States
CityOrlando
Period6/8/146/11/14

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials

Fingerprint Dive into the research topics of 'Open-graded aggregate base (OGAB) controlling subsurface moisture regime and structural stability from MnROAD instrumentation data'. Together they form a unique fingerprint.

Cite this