Another Look at Chemkrete

Details

• Creators:
  Adams, Cindy K. ; Button, Joe W.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas State Department of Highways and Public Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Additives Asphalt Asphalt Cement Asphalt Pavements Bituminous Mixtures Brittleness Chemkrete Concrete Curing Laboratory Tests Manganese Pavement Cracking Stability (Mechanics) Tensile Strength

  More +
• Publication/ Report Number:
  FHWA/TX-87/471-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas ; United States
• Edition:
  Interim: January 1984 - June 1987
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  The purpose of this study was to investigate the effects of curing time and air void content on asphalt paving mixtures containing Chemkrete. One goal of this study was to determine whether the rapid aging of this product in the early stages is temporary to insure that continued hardening of the binder does not eventually produce excessively brittle mixtures. Different dosages of Chemkrete, aging periods and air void contents were evaluated using different asphalt aggregate mixtures. Laboratory tests and literature reviews indicated that the Chemkrete slows after about 20 days but does not appear to cease even at 90 days. Using a softer grade of asphalt with Chemkrete, laboratory mixtures attained equal or greater strength, stability and stiffness as compared to control mixtures containing an untreated harder grade of asphalt cement. Based on laboratory tests, Chemkrete mixtures containing higher air voids and allowed to cure at temperatures above 77°F for 30 days or more, the mixtures attained a significantly greater stiffness than the control mixtures. Two field test pavements were constructed. Samples were subjected to long-term conditioning at high temperatures similar to summer pavement temperatures. Tensile strength, stiffness, stability and water susceptibility of roadway cores and laboratory molded samples were quantified. Extracted asphalt cements were tested for viscosity, penetration and softening point. The Chemkrete sections of both test roads are experiencing extensive cracking.
• Format:
  PDF
• Funding:
  2-9-85-471
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:cbf1fa2ac16631459d79ef684e94754468d9bd20596aed6558f3ba428ad1a4bdd3a11b70681a4683f2282a09d735e214e2253d45e489f8fca8bd83af3e0d7ff0
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/86072/dot_86072_DS1.pdf
• File Type:
  [PDF - 2.26 MB ]