3190
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
generate stresses for application of the permanent strain model
and therefore predict pavement life. The life of a pavement
constructed with material B was predicetd to improve 100 fold
when the moulding moisture content was 60%, not 90% OMC.
Figure 5. Permanent strain modeling of the materials at 80% OMC
8 CONCLUSION
From the evidence presented from RLTT data, the RCA
products could be used as Class 1 base, while the blended
products are more suited to Class 2 applications, or subbase.
Other specification systems dependent on basic engineering
properties, such as Los Angeles Abrasion and Liquid Limit may
restrict the application of recycled materials to lesser
applications. This paper has highlighted current research on
recycled aggregates in South Australia, including the
development of models for predicting both resliient modulus
and permanent strain. Improvements to the models are being
sought; for example matric suction should replace moisture
content in the permanent strain model.
9 ACKNOWLEDGEMENTS
This research has been supported by industry partners
ResourceCo and Adelaide Resource Recovery, as well as
ZeroWaste and the Australian Road Research Board.
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-7,000
-6,000
-5,000
-4,000
-3,000
-2,000
-1,000
0
0
50,000
100,000 150,000 200,000 250,000 300,000
Permanent Strain (
m/m)
Pulse Counts
A
predicted for A
B
predicted for B
Q
predicted for Q
