Modeling In Situ Performance of Cement-Stabilized Granular Base Layers of Urban Roads
This study used a three-dimensional nonlinear orthotropic computational road model to measure the performance of reclaimed and recycled portland cement concrete (PCC) aggregates and reclaimed asphalt pavement (RAP) aggregates stabilized with cement as a base layer in a typical local road structure in the city of Saskatoon, Saskatchewan, Canada. The pavement structure was composed of 45-mm hot-mix asphalt concrete on a 225-mm granular base built directly over an in situ subgrade. The cross section was analyzed with a conventional granular base layer as a baseline and PCC and RAP base layers with 2% cement stabilization. The cement-stabilized PCC and RAP base layers showed improved shear strain and horizontal strain behavior when compared with the conventional granular base layer (which was not cement stabilized). This improvement confirmed that cement stabilization of reclaimed PCC and RAP materials provided an enhanced primary response. This study demonstrated that typical thin Saskatoon pavement structures were highly dependent on the constitutive properties of base layer material. Stabilizing the PCC and RAP base layers with 2% cement reduced the maximum shear strains at the edge of the pavement structure by 12% and 25%, respectively, compared with the unstabilized conventional granular base layer. It was believed that the increased fracture and cohesion of the residual cementitious materials inherent to recycled granular base, as well as the cementitious binder added, improved structural performance.
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- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://www.trb.org/Main/Blurbs/169884.aspx
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Authors:
- Soares, Roberto
- Haichert, Rielle
- Podborochynski, Diana
- Berthelot, Curtis
- Publication Date: 2013
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 88–95
- Monograph Title: Soil Mechanics 2013
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 2363
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Base course (Pavements); Granular bases; Hot mix asphalt; Paving materials; Portland cement concrete; Reclaimed asphalt pavements; Stabilized materials
- Subject Areas: Construction; Geotechnology; Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers;
Filing Info
- Accession Number: 01473525
- Record Type: Publication
- ISBN: 9780309286794
- Report/Paper Numbers: 13-0879
- Files: PRP, TRIS, TRB, ATRI
- Created Date: Feb 22 2013 10:30AM