TY - JOUR
T1 - Effects of morphological characteristics of aggregate particles on the mechanical behavior of bituminous paving mixtures
AU - Aragão, Francisco Thiago Sacramento
AU - Pazos, Abraham Ricardo Guerrero
AU - Motta, Laura Maria Goretti da
AU - Kim, Yong Rak
AU - Nascimento, Luis Alberto Herrmann do
N1 - Funding Information:
The authors are grateful for the financial support received from the Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro (FAPERJ, Brazil) and from the National Council for Scientific and Technological Development (CNPq, Brazil).
Publisher Copyright:
© 2016
PY - 2016/10/1
Y1 - 2016/10/1
N2 - This study evaluates the influence of morphological properties of aggregates on the mechanical behavior of bituminous mixtures. For that, two aggregates with different characteristics, i.e., round river gravel and crushed gneiss, were used in the research. Laboratory tests were conducted to characterize morphological properties of the aggregates following traditional methodologies and using a modern image analysis system, AIMS 2. Six asphalt mixtures containing different proportions of gravel and crushed gneiss were designed according to the Superpave methodology and evaluated in mechanical performance tests. The results obtained indicated that aggregate morphological characteristics, especially those of coarse particles, are strongly correlated with the resistance to rutting of the asphalt mixtures. In addition, AIMS 2 was shown to provide more direct and scientific measurements of aggregate morphological characteristics that present higher correlations with the mixture performance than traditional methodologies. Finally, the results also demonstrated that the aggregate surface texture is highly correlated to the performance of the mixtures and should be carefully considered in aggregate and asphalt mixture specifications.
AB - This study evaluates the influence of morphological properties of aggregates on the mechanical behavior of bituminous mixtures. For that, two aggregates with different characteristics, i.e., round river gravel and crushed gneiss, were used in the research. Laboratory tests were conducted to characterize morphological properties of the aggregates following traditional methodologies and using a modern image analysis system, AIMS 2. Six asphalt mixtures containing different proportions of gravel and crushed gneiss were designed according to the Superpave methodology and evaluated in mechanical performance tests. The results obtained indicated that aggregate morphological characteristics, especially those of coarse particles, are strongly correlated with the resistance to rutting of the asphalt mixtures. In addition, AIMS 2 was shown to provide more direct and scientific measurements of aggregate morphological characteristics that present higher correlations with the mixture performance than traditional methodologies. Finally, the results also demonstrated that the aggregate surface texture is highly correlated to the performance of the mixtures and should be carefully considered in aggregate and asphalt mixture specifications.
KW - Aggregates
KW - Asphalt mixtures
KW - Mechanical behavior
KW - Morphological properties
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U2 - 10.1016/j.conbuildmat.2016.07.013
DO - 10.1016/j.conbuildmat.2016.07.013
M3 - Article
AN - SCOPUS:84978924419
VL - 123
SP - 444
EP - 453
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
ER -