Planar Reinforcements for Flexible Pavements

Goud, G N and B, Umashankar (2017) Planar Reinforcements for Flexible Pavements. In: International Conference on GEOTECHNIQUES FOR INFRASTRUCTURE PROJECTS, 27th & 28th February 2017, Thiruvananthapuram.

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ase and subbase layers, forming a major portion of a pavement, are constructed using crushe d aggregates. In order to reduce the consumption of h uge quantities of aggregates in large-size projects, it is essential to adapt and utilize alternate materials and design me thods in building sustainable road ways. Reinforcing flexibl e pavements is one of the ways to improve the performance or to reduce the pavement thickness. Many researchers conducted exp eriments to quantify the benefit of reinforcing flexible pav ements in terms of traffic benefit ratio (TBR). In this study , Large Scale Model Experiments (LSME) are conducted to investigate the settlement behaviour of unpaved pavement system aga inst static loading. The design of reinforced unpaved ro ads is carried out using Giroud and Han method with reinfo rcement in the form of geogrids having aperture stability m odulus of 0.32 N-m/ 0 and 0.65 N-m/ 0 . The design of reinforced paved roads is carried out using AASHTO guidelines with th e selected TBR values equal to 3 and 6. From the LSME conducted on the unreinforced and reinforced unpave d pavement system, it is observed that inclusion of p lanar reinforcement in the form of geogrid or steel-wire- mesh within the aggregate layer resulted in load improvement fa ctor ranging from 1.1 to 1.9. Based on the design carrie d out using the proposed methods on paved and unpaved reinforce d roads, it is possible to reduce the pavement thickness fro m 20% to 70% depending on the type of geogrid and subgrade s trength.

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Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: planar reinforcement, geogrid, hexagonal ste el- wire-mesh, load improvement factor, traffic benefit ratio, base course reduction factor
Subjects: Civil Engineering > Construction & Building Technology
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 04 Apr 2017 09:48
Last Modified: 01 Sep 2017 06:32
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