A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Real-Time Modulus Mapping of Pavement Foundation Layers at MnROAD
The 2017 reconstruction of MnROAD-National Road Research Alliance (NRRA) low volume and mainline road test sections involved constructing a range of pavement surfaces and foundations. This paper presents results from automated plate load testing (APLT) and validated intelligent compaction (VIC), which was used to develop spatial coverage maps of resilient modulus on finished unbound foundation layers. Testing was performed in selected test sections of the low volume road test track, with the primary objective of measuring in situ resilient modulus (Mr) of the unbound pavement foundation layers. The surface at the time of testing ranged between relatively soft clay subgrade to well-compacted and relatively stable aggregate base layers. The aggregate subbase/base layers in some of the test sections included large stone subbase, conventional aggregates, and recycled concrete aggregates. VIC field calibration testing was performed with APLT to determine cyclic stress-dependent composite Mr as well as backcalculated Mr values for the overlying granular base/subbase and the underlying subgrade. VIC mapping on some test sections showed increasing Mr with increasing pass, demonstrating the need for additional compaction effort that would have not been realized without real-time mapping. VIC mapping also demonstrated significant variability in Mr properties between the test sections and within each test section.
Real-Time Modulus Mapping of Pavement Foundation Layers at MnROAD
The 2017 reconstruction of MnROAD-National Road Research Alliance (NRRA) low volume and mainline road test sections involved constructing a range of pavement surfaces and foundations. This paper presents results from automated plate load testing (APLT) and validated intelligent compaction (VIC), which was used to develop spatial coverage maps of resilient modulus on finished unbound foundation layers. Testing was performed in selected test sections of the low volume road test track, with the primary objective of measuring in situ resilient modulus (Mr) of the unbound pavement foundation layers. The surface at the time of testing ranged between relatively soft clay subgrade to well-compacted and relatively stable aggregate base layers. The aggregate subbase/base layers in some of the test sections included large stone subbase, conventional aggregates, and recycled concrete aggregates. VIC field calibration testing was performed with APLT to determine cyclic stress-dependent composite Mr as well as backcalculated Mr values for the overlying granular base/subbase and the underlying subgrade. VIC mapping on some test sections showed increasing Mr with increasing pass, demonstrating the need for additional compaction effort that would have not been realized without real-time mapping. VIC mapping also demonstrated significant variability in Mr properties between the test sections and within each test section.
Real-Time Modulus Mapping of Pavement Foundation Layers at MnROAD
Vennapusa, Pavana (author) / White, David J. (author) / Siekmeier, John (author) / Coban, Haluk S. (author) / Cetin, Bora (author)
Geo-Congress 2020 ; 2020 ; Minneapolis, Minnesota
Geo-Congress 2020 ; 559-571
2020-02-21
Conference paper
Electronic Resource
English
Real-Time Modulus Mapping of Pavement Foundation Layers at MnROAD
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