The effects of coarse aggregate cleanliness and moisture content on asphalt concrete compactability and moisture susceptibility.

Details

• Creators:
  Williams, Kevin L. ; Howard, Isaac L. ; Cooley, L. Allen
• Corporate Creators:
  Mississippi State University
• Corporate Contributors:
  Mississippi. Dept. of Transportation. Research Division ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt concrete
  • Concrete
  • Moisture content
  • Compactibility
  • Aggregates
  • Asphalt concrete
  • Asphalt concrete--Moisture
  • Concrete--Moisture
  • Highway research--Mississippi
  • Pavements--Mississippi--Testing
  More +
• Publication/ Report Number:
  FHWA/MS-DOT-RD-11-208
• Resource Type:
  Tech Report
• Geographical Coverage:
  Mississippi
• Edition:
  Final report; Jan. 11, 2008-Dec. 31, 2011.
• Corporate Publisher:
  Mississippi. Dept. of Transportation
• Abstract:
  Twelve field projects were studied where forty-four locations were evaluated to assess the cause or ; causes of asphalt concrete that exhibits ‘tender zone’ characteristics (i.e. instability during compaction) and to ; investigate the tendency of these mixes to be susceptible to moisture damage over time. Data was collected ; during construction and samples were taken and used to conduct multiple laboratory tests. All field and ; laboratory data was used to develop multiple regression equations to predict final in place air voids and moisture ; susceptibility. The overall conclusion from the research was that compactability appeared to be predicted in a ; reasonable manner while moisture susceptibility did not. The Methylene Blue test appears promising when used ; in conjunction with moisture content (cold feed and mix moisture contents were measured) as a means of ; providing guidance for achieving higher in place density. The tensile strength ratio (TSR) test as performed in ; this research on laboratory compacted specimens was found to be questionable in terms of its ability to predict ; field moisture susceptibility.
  More +
• Format:
  PDF
• Funding:
  SS-208
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24086/dot_24086_DS1.pdf
• File Type:
  [PDF - 23.10 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fdbe608ca8a7c5742033dfd3a0c2c63e3d12647c150fc4d8112a947592d7cb4f709329187af43f9327d80bb2b284f6503f73f1ace0f3a4979ce377d21d2ab613