Evaluation of Low-Quality Recycled Concrete Pavement Aggregates for Portland Cement-Treated Base [Technical Summary]

Details

• Creators:
  Daily, Koby ; Jones, Christopher ; Hossain, Mustaque
• Corporate Creators:
  Kansas State University Transportation Center. Department of Civil Engineering
• Corporate Contributors:
  Kansas. Dept. of Transportation. Bureau of Research ; Kansas Transportation Research and New-Developments (K-TRAN) Research Program
• Subject/TRT Terms:
  Aggregates Freeze Thaw Durability Mix Design Portland Cement Recycled Materials
• Publication/ Report Number:
  K-TRAN: KSU-16-2 P1
• Resource Type:
  Brief
• Geographical Coverage:
  Kansas;United States
• Edition:
  Technical Summary
• Corporate Publisher:
  Kansas. Department of Transportation
• Abstract:
  This research was divided into two studies. The first study focused on D-cracked recycled concrete aggregate (RCA) portland cement-treated base. RCA was obtained from D-cracked pavement sources in Topeka and Kansas City. These aggregates were used to batch three PCTB mixtures per RCA source. All mixes followed KDOT’s 90-day curing outlined in KTMR-22, including 67 days in a wet room with 100% humidity and drying in a 73 °F room with 50% relative humidity for 21 days. After a day of curing, the samples were immersed in 70 °F water for 24 hours, followed by immersion in 40 °F water. Upon completion of curing, all samples were subjected to cycles of freezing in air and thawing in water per ASTM C666 Procedure B (KTMR-22, 2015). Multiple measurements of mass, relative dynamic modulus of elasticity (RDME), and length change for each sample were made. The second part of the study compared samples of concrete mixture with RCA to control samples. The control concrete samples consisted of virgin aggregates that had not been previously used in any concrete mixing. The virgin aggregates and concrete mixtures were placed under the same conditions as the RCA to limit any variability.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:189d7b1d604a3c28e1d12a359941b91f561f59261af42303bc894cc2a74d56cadfa0a86c0c173c13bc6a7df5d1529244cee1cd713c61823072c1a8e2d57b3fbe
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/76538/dot_76538_DS1.pdf
• File Type:
  [PDF - 320.66 KB ]