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 - Publisher Copyright:
© 2024 American Society of Civil Engineers.
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 -