Design and Evaluation of Foamed Asphalt Base Materials

Foamed asphalt stabilized base (FASB) combines reclaimed asphalt pavement (RAP), recycled concrete (RC), and/or graded aggregate base (GAB) with a foamed asphalt binder to produce a partially stabilized base material. The objectives of this study are to determine for Maryland conditions: (1) FASB mix design procedures; (2) typical engineering and structural design properties; (3) guidelines for FASB production and placement; and (4) best practices for construction quality assurance. The study consisted of three major components: (1) laboratory evaluation of FASB mix design procedures; (2) field evaluation of in-place FASB stiffness, and especially the increase in this stiffness with time due to curing; and (3) direct laboratory measurement of the performance related properties of FASB, specifically dynamic modulus and permanent deformation resistance. Recommended default design values for resilient modulus and structural layer coefficient are 300 – 400 ksi and 0.30 – 0.35, respectively. The study findings also provided guidance for the development of draft specifications.

• Record URL:
  http://www.roads.maryland.gov/OPR_Research/MD-13-SP909B4E_Foamed-Asphalt-Base-Materials_Report.pdf
• 
• Summary URL:
  http://www.roads.maryland.gov/OPR_Research/MD-13-SP909B4E_Foamed-Asphalt-Base-Materials_Summary.pdf
• Corporate Authors:

  University of Maryland, College Park

  Department of Civil and Environmental Engineering
  College Park, MD  United States  20742

  Maryland State Highway Administration

  Office of Policy and Research, 707 North Calvert Street
  Baltimore, MD  United States  21202
• Authors:
  • Schwartz, Charles W
  • Khosravifar, Sadaf
• Publication Date: 2013-5

Language

• English

Media Info

• Media Type: Web
• Edition: Final Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 95p

Subject/Index Terms

• TRT Terms: Base course (Pavements); Best practices; Dynamic modulus of elasticity; Field studies; Foamed asphalt; Laboratory tests; Mix design; Modulus of deformation; Quality assurance; Stiffness
• Geographic Terms: Maryland
• Subject Areas: Highways; Materials; Pavements; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01482137
• Record Type: Publication
• Report/Paper Numbers: MD-13-SP909B4E
• Contract Numbers: SP909B4E
• Files: TRIS, ATRI, STATEDOT
• Created Date: May 23 2013 2:54PM