Equivalency of crushed rock with industrial by-products and geosynthetic-reinforced aggregates used for working platforms during pavement construction

File(s)
Date
2005-10Author
Edil, Tuncer
Benson, Craig H.
Kim, Woon-Hyung
Tanyu, Burak F.
Publisher
Wisconsin Highway Research Program
Metadata
Show full item recordAbstract
A study was conducted to define an equivalency criterion for five materials used for working platforms during pavement construction on a poor subgrade: conventional crushed rock (referred to as "breaker run") and four alternatives [i.e. Grade 2 granular backfill (referred to as "Grade 2"), foundry slag, bottom ash, and foundry sand]. Total deflection data for the equivalency assessment were obtained from a large-scale model experiment (LSME) simulating a prototype-scale pavement structure and in the field using a rolling wheel deflectometer (RWD). Design charts were developed for selecting the equivalent thickness of alternative working platform materials so that the alternative provides equal deflection as a layer of breaker run. Another phase of the study was conducted to determine the equivalency of geosynthetic-reinforced aggregate working platforms in providing support during pavement construction over soft subgrade. Four reinforcing geosynthetics (a geogrid, a woven geotextile, a non-woven geotextile, and drainage geocomposite) incorporated into two granular materials: Grade 2 and breaker run were used in this study. Design charts were developed for selecting the equivalent thickness of an alternative geosynthetic-reinforced working platform material so that the alternative provides equal deflection as a layer of breaker run.
Subject
Deflectometers
Design charts
Crushed rock
Backfill soils
Deflection
Subgrade (Pavements)
Thickness
Geotextiles
Aggregates
Slag
Bottom ash
Geogrids
Foundry sand
Geosynthetics
Road construction
Paving
Permanent Link
http://digital.library.wisc.edu/1793/53965Type
Technical Report
Description
100 p.