Accelerated Pavement Testing of Geocell-Reinforced Unpaved Roads over Weak Subgrade

Full-scale trafficking tests were conducted to evaluate the effect of novel polymeric-alloy geocell reinforcement on base courses for low-volume unpaved roads over weak subgrade. Three types of in-fill materials—crushed limestone (AB-3) aggregate, quarry waste (QW), and recycled asphalt pavement (RA...

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Bibliographic Details
Published in:Transportation research record 2011-01, Vol.2204 (1), p.67-75
Main Authors: Pokharel, Sanat Kumar, Han, Jie, Manandhar, Chandra, Yang, Xiaoming, Leshchinsky, Dov, Halahmi, Izhar, Parsons, Robert L.
Format: Article
Language:English
Subjects:
Aggregates
Pavements
Recycled
Reinforcement
Roads
Stress concentration
Stress distribution
Wheels
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Summary:Full-scale trafficking tests were conducted to evaluate the effect of novel polymeric-alloy geocell reinforcement on base courses for low-volume unpaved roads over weak subgrade. Three types of in-fill materials—crushed limestone (AB-3) aggregate, quarry waste (QW), and recycled asphalt pavement (RAP)—were used for the base courses over a weak subgrade layer consisting of A-7-6 clay. Four unpaved sections that included one unreinforced control section of AB-3 aggregate 30 cm thick and three 17-cm novel polymeric-alloy geocell-reinforced sections were tested under a single-axle dual-tire wheel loading. The road sections were exhumed and examined after the moving-wheel test. The benefits of novel polymeric-alloy geocell reinforcement were evaluated in relation to rut depths for a specific number of passes of the wheel load and the angle of stress distribution from the surface to the base course–subgrade interface. The test results demonstrated that the novel polymeric-alloy geocell reinforcement improved the performance of unpaved AB-3 and RAP sections. The QW section also showed better performance in relation to stress distribution angle.
ISSN:0361-1981
2169-4052
DOI:10.3141/2204-09