TY - JOUR
T1 - Designing Stone-Matrix Asphalt to Optimize Sustainability Using Limestone, Dolomite, and Crushed Gravel Aggregates
AU - García Mainieri, Javier J.
AU - Al-Qadi, Imad L.
N1 - This publication is based on results from ICT-R27-216: Optimizing the Use of Local Aggregates in Stone-matrix Asphalt (SMA). ICTR27-216 is being conducted in cooperation with the Illinois Center for Transportation (ICT); the Illinois Department of Transportation (IDOT); and the US Department of Transportation, Federal Highway Administration (FHWA). The support of ICT researchers and engineers is acknowledged; special thanks to G. Renshaw, J. Rivera-Perez, W. Sayeh, A. Bajaj, A. Singh, M. N. Fakhreddine, L. Diab, G. Sulaiman, A Ramakrishnan, and P. Singhvi. The contributions of the project technical review panel are acknowledged; special thanks to W. J. Pine, B. Hill, A. Stolba, J. Trepanier, and J. Kern. The content of this paper reflects the views of the authors, who bear full responsibility for the factual accuracy and integrity of the data presented herein. The content does not necessarily reflect the official views or policies of the ICT, IDOT, or FHWA.
PY - 2025/3/1
Y1 - 2025/3/1
N2 - Stone-matrix asphalt (SMA) relies on stone-on-stone contact of coarse aggregate (CA) to generate a load carrying structure or an aggregate skeleton that minimizes flexible pavement rutting potential. Local CA may require relatively shorter distance hauling thereby making SMA more sustainable and cost-efficient but may have lesser quality characteristics than igneous aggregate. Hence, possible aggregate breakage must be quantified and addressed in the mix design. In this paper, SMA was designed using limestone, dolomite, and crushed gravel aggregates, which may result in relatively greater aggregate breakage. Fourteen SMAs were designed using different CA sources with various qualities. A methodology was proposed to measure aggregate breakage during compaction and rut testing of SMA by recovering the aggregates through extraction. An index was introduced and calibrated to quantify aggregate breakage. This allows assessing aggregate structure integrity during SMA production and paving.
AB - Stone-matrix asphalt (SMA) relies on stone-on-stone contact of coarse aggregate (CA) to generate a load carrying structure or an aggregate skeleton that minimizes flexible pavement rutting potential. Local CA may require relatively shorter distance hauling thereby making SMA more sustainable and cost-efficient but may have lesser quality characteristics than igneous aggregate. Hence, possible aggregate breakage must be quantified and addressed in the mix design. In this paper, SMA was designed using limestone, dolomite, and crushed gravel aggregates, which may result in relatively greater aggregate breakage. Fourteen SMAs were designed using different CA sources with various qualities. A methodology was proposed to measure aggregate breakage during compaction and rut testing of SMA by recovering the aggregates through extraction. An index was introduced and calibrated to quantify aggregate breakage. This allows assessing aggregate structure integrity during SMA production and paving.
KW - Breakage
KW - Coarse aggregate (CA)
KW - Stone-matrix asphalt (SMA)
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U2 - 10.1061/JPEODX.PVENG-1614
DO - 10.1061/JPEODX.PVENG-1614
M3 - Article
AN - SCOPUS:85212392896
SN - 2573-5438
VL - 151
JO - Journal of Transportation Engineering Part B: Pavements
JF - Journal of Transportation Engineering Part B: Pavements
IS - 1
M1 - 04024061
ER -