Recycled tires as coarse aggregate in concrete pavement mixtures.

Details

• Creators:
  Liu, Rui
• Corporate Creators:
  University of Colorado at Denver
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Concrete pavements
  • Admixtures
  • Coarse aggregates
  • Tires
  • Compressive strength
  • Flexural strength
  • Permeability
  • Freeze thaw durability
  • Laboratory tests
  • Reclaimed rubber
• Publication/ Report Number:
  CDOT-2013-10
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation. Research Branch
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Design
• Abstract:
  The reuse potential of tire chips as coarse aggregates in pavement concrete was examined in this research by ; investigating the effects of low- and high-volume tire chips on fresh and hardened concrete properties. One concrete ; control mixture was designed, which well exceeds CDOT Class P concrete requirements. The coarse aggregate ; component of the mixture was replaced in 100%, 50%, 30%, 20%, and 10% by volume using tire chips. The fresh ; concrete properties, compressive strength, flexural strength, splitting strength, permeability, and freeze/thaw durability ; were tested in the lab to evaluate the potential of including tire chips in concrete paving mixes. The testing results ; indicate tire chips can be used to replace coarse aggregate in concrete pavement mixtures. Two mixtures with 10% ; coarse aggregate replaced by tire chips had the best performance. The workability was comparable to the control ; mixture, and the air content reached 6%. At 28 days of age, the average compressive strength of the two mixtures was ; significantly less than the control but still exceeded CDOT’s specification of 4200 psi; the averaged flexural and ; splitting tensile strengths were higher than 900 psi and 590 psi respectively. In addition, the two mixtures exhibited ; moderate resistance to chloride-ion penetration at 28 days of age and high freeze/thaw durability. The rubberized ; mixtures investigated in this study sustained a much higher deformation than the control mixture when subjected to ; compressive, flexural, and splitting loadings.
  More +
• Format:
  PDF
• Funding:
  22.65
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26266/dot_26266_DS1.pdf
• File Type:
  [PDF - 1.05 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dbd14cd42708b4873d7b15bcdd5011ebcf18357f179351089a5d4d5d83546685