TY - JOUR
T1 - Microstructural and rheological investigation of asphalt mixtures containing recycled asphalt materials
AU - Cannone Falchetto, Augusto
AU - Montepara, Antonio
AU - Tebaldi, Gabriele
AU - Marasteanu, Mihai O.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/10
Y1 - 2012/10
N2 - Using increased proportions of Reclaimed Asphalt Pavement (RAP) in asphalt pavements construction has become a top priority due to significant economic and environmental benefits. A similar trend has also emerged in Recycled Asphalt Shingles (RAS), which represent the main roofing material in US. In this paper, the effect of adding RAP and RAS on low temperature properties of asphalt mixtures is investigated using microstructural analysis and modeling of rheological data obtained on eight asphalt mixtures. Detailed information on internal microstructure of asphalt mixtures is obtained from digital images of asphalt mixtures beams and numerical estimations of spatial correlation functions. It is found that that microstructure spatial distribution is not affected by RAP and RAS addition. Mechanical analog (Sharpe, 2008 [18]) and semi empirical models are used to back-calculate binder creep stiffness from mixture experimental data. Differences between back-calculated results and experimental data suggest blending between new and old binder may be only partial.
AB - Using increased proportions of Reclaimed Asphalt Pavement (RAP) in asphalt pavements construction has become a top priority due to significant economic and environmental benefits. A similar trend has also emerged in Recycled Asphalt Shingles (RAS), which represent the main roofing material in US. In this paper, the effect of adding RAP and RAS on low temperature properties of asphalt mixtures is investigated using microstructural analysis and modeling of rheological data obtained on eight asphalt mixtures. Detailed information on internal microstructure of asphalt mixtures is obtained from digital images of asphalt mixtures beams and numerical estimations of spatial correlation functions. It is found that that microstructure spatial distribution is not affected by RAP and RAS addition. Mechanical analog (Sharpe, 2008 [18]) and semi empirical models are used to back-calculate binder creep stiffness from mixture experimental data. Differences between back-calculated results and experimental data suggest blending between new and old binder may be only partial.
KW - Back-calculation
KW - Creep stiffness
KW - Manufacturer waste scrap shingles
KW - Microstructure
KW - Reclaimed asphalt pavement
KW - Tear-off scrap shingles
UR - http://www.scopus.com/inward/record.url?scp=84861337114&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861337114&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2012.04.016
DO - 10.1016/j.conbuildmat.2012.04.016
M3 - Article
AN - SCOPUS:84861337114
SN - 0950-0618
VL - 35
SP - 321
EP - 329
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -