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:
  Admixtures Coarse Aggregates Compressive Strength Concrete Pavements Flexural Strength Freeze Thaw Durability Laboratory Tests Permeability Reclaimed Rubber Tires
• 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.
  
  
• Format:
  PDF
• Funding:
  22.65
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dbd14cd42708b4873d7b15bcdd5011ebcf18357f179351089a5d4d5d83546685
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26266/dot_26266_DS1.pdf
• File Type:
  [PDF - 1.05 MB ]