A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Accelerated Loading Evaluation of Foamed Asphalt Treated RAP Layers in Pavement Performance
Due to a lack of locally produced high-quality stone base materials, the Louisiana Department of Transportation and Development (LADOTD) is continuously seeking alternative base materials in lieu of crushed stones used for roadway construction. This report documents the research efforts conducted at the Louisiana Transportation Research Center (LTRC) regarding foamed-asphalt treated reclaimed asphalt pavement (RAP) alternative base materials and provides detailed information on experiment design as well as conducted field and laboratory tests. An accelerated pavement testing (APT) experiment was conducted in this study using the Accelerated Loading Facility (ALF) at LTRCs Pavement Research Facility (PRF) testing site. The APT experiment included three different base test sections: the first one contained a foamed-asphalt treated 100 percent RAP base course (FA/100RAP), the second used a foamed-asphalt treated 50 percent RAP and 50 percent recycled soil cement base course (FA/50RAP/50SC), and the third had a crushed limestone base. Despite using different base materials, the three APT sections shared other pavement layers and had a common pavement structure: a 2-in. asphalt wearing course, an 8.5-in. base course, and a 12-in. cement-treated subbase course over an A-4 soil embankment subgrade. Each section was instrumented with one multi-depth deflectometer and two pressure cells for measuring ALF moving load induced pavement responses (i.e., deflections and vertical stresses). To expedite traffic-induced pavement deteriorations, two steel load plates of 2,300-lb. each were added to the ALF load assembly (with a self-weight of 9,750-lb.) specifically at the loading cycle numbers of 175,000 and 225,000, respectively.
Accelerated Loading Evaluation of Foamed Asphalt Treated RAP Layers in Pavement Performance
Due to a lack of locally produced high-quality stone base materials, the Louisiana Department of Transportation and Development (LADOTD) is continuously seeking alternative base materials in lieu of crushed stones used for roadway construction. This report documents the research efforts conducted at the Louisiana Transportation Research Center (LTRC) regarding foamed-asphalt treated reclaimed asphalt pavement (RAP) alternative base materials and provides detailed information on experiment design as well as conducted field and laboratory tests. An accelerated pavement testing (APT) experiment was conducted in this study using the Accelerated Loading Facility (ALF) at LTRCs Pavement Research Facility (PRF) testing site. The APT experiment included three different base test sections: the first one contained a foamed-asphalt treated 100 percent RAP base course (FA/100RAP), the second used a foamed-asphalt treated 50 percent RAP and 50 percent recycled soil cement base course (FA/50RAP/50SC), and the third had a crushed limestone base. Despite using different base materials, the three APT sections shared other pavement layers and had a common pavement structure: a 2-in. asphalt wearing course, an 8.5-in. base course, and a 12-in. cement-treated subbase course over an A-4 soil embankment subgrade. Each section was instrumented with one multi-depth deflectometer and two pressure cells for measuring ALF moving load induced pavement responses (i.e., deflections and vertical stresses). To expedite traffic-induced pavement deteriorations, two steel load plates of 2,300-lb. each were added to the ALF load assembly (with a self-weight of 9,750-lb.) specifically at the loading cycle numbers of 175,000 and 225,000, respectively.
Accelerated Loading Evaluation of Foamed Asphalt Treated RAP Layers in Pavement Performance
L. N. Mohammad (author) / Z. Wu (author) / W. M. King (author)
2013
91 pages
Report
No indication
English