TY - JOUR
T1 - Influences of crumb rubber size and type on reclaimed asphalt pavement (RAP) mixtures
AU - Xiao, Feipeng
AU - Amirkhanian, Serji N.
AU - Shen, Junan
AU - Putman, Bradley
PY - 2009/2
Y1 - 2009/2
N2 - Over the years, recycling has become one of the most attractive pavement rehabilitation alternatives, and different recycling methods are now available to address specific pavement distresses and structural needs. The objective of this study was to investigate and evaluate the engineering properties of crumb rubber size and type influences on reclaimed asphalt pavement (RAP) mixtures. The experimental design for this study included the use of three rubber sizes and two rubber types (ambient or cryogenic) in the mixture containing 25% RAP mixtures. In this study, the results of the experiments indicated that the addition of crumb rubber was helpful in increasing the voids in mineral aggregate (VMA) in Superpave mix design and improving rutting resistance of mixture regardless of rubber size and type. On the other hand, indirect tensile strength (ITS) values show no significant difference for mixtures made with three type rubber sizes. However, the increase of rubber size, regardless of rubber type, reduced the resilient modulus values but extended the fatigue life of the modified mixtures.
AB - Over the years, recycling has become one of the most attractive pavement rehabilitation alternatives, and different recycling methods are now available to address specific pavement distresses and structural needs. The objective of this study was to investigate and evaluate the engineering properties of crumb rubber size and type influences on reclaimed asphalt pavement (RAP) mixtures. The experimental design for this study included the use of three rubber sizes and two rubber types (ambient or cryogenic) in the mixture containing 25% RAP mixtures. In this study, the results of the experiments indicated that the addition of crumb rubber was helpful in increasing the voids in mineral aggregate (VMA) in Superpave mix design and improving rutting resistance of mixture regardless of rubber size and type. On the other hand, indirect tensile strength (ITS) values show no significant difference for mixtures made with three type rubber sizes. However, the increase of rubber size, regardless of rubber type, reduced the resilient modulus values but extended the fatigue life of the modified mixtures.
KW - Crumb rubber
KW - Fatigue life
KW - Reclaimed asphalt pavement
KW - Resilient modulus
KW - Rubberized mixture
KW - Rutting resistance
UR - http://www.scopus.com/inward/record.url?scp=54349100758&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2008.05.002
DO - 10.1016/j.conbuildmat.2008.05.002
M3 - Article
AN - SCOPUS:54349100758
SN - 0950-0618
VL - 23
SP - 1028
EP - 1034
JO - Construction and Building Materials
JF - Construction and Building Materials
IS - 2
ER -