Development of tiered aggregate specifications for FDOT use.

Details

• Creators:
  Tia, Mang ; Bekoe, Patrick ; Chen, Yu
• Corporate Creators:
  University of Florida. Dept. of Civil and Coastal Engineering
• Corporate Contributors:
  Florida. Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  Abrasion Abrasion Tests Aggregates Aggregates (Building Materials) Aggregates, Rock And Stone Pavements, Asphalt--Florida Performance Based Specifications Roads--Florida--Base Courses Specifications Surface Texture Tests
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Edition:
  Final report; 02/09/10-03/01/12.
• Corporate Publisher:
  University of Florida. Department of Civil and Coastal Engineering
• Abstract:
  At present, all limestone aggregates to be used in Florida Department of Transportation (FDOT) projects fall under a single
  
  category and must meet the same set of minimum durability requirements. For example, a limestone aggregate mine which
  
  could not produce aggregates with a maximum LA Abrasion Loss of 45% would not be approved by FDOT. This research
  
  project was conducted to investigate the feasibility of using some aggregates which do not meet the current FDOT aggregate
  
  specifications in some concrete applications and to develop tiered aggregate specifications for use by FDOT.
  
  A laboratory testing program was conducted to evaluate the properties of concrete made with aggregates which do not meet
  
  current FDOT aggregate specifications and to compare them with those made with aggregates which meet the current FDOT
  
  specifications. Ten different aggregate sources were selected for use in this study. They included two control aggregates which
  
  met the 2010 FDOT aggregate specifications and eight aggregates which did not meet at least one of the aggregate specification
  
  requirements. The required aggregate properties which were not met included the maximum allowable LA abrasion loss,
  
  percent passing No. 200 sieve, and shell content.
  
  Based on the results from this study, a developmental three-tier aggregate specification is recommended for use by FDOT.
  
  The first tier (Category A) aggregate would have the same requirements as the current FDOT aggregate specifications. The
  
  second tier (Category B) and third tier (Category C) aggregates have relaxed requirements in maximum allowable LA
  
  abrasion loss, sodium sulfate soundness loss, and materials passing No. 200 sieve. Possible uses for Category B aggregates
  
  include all nonstructural concrete applications, manholes, inlets, and junction boxes. Category C aggregates are recommended
  
  only for non-structural concrete applications. Results of analysis in this study indicate that Category B aggregates can possibly
  
  be used in concrete pavement application. Further study to evaluate the suitability of using Category B aggregates for concrete
  
  pavement and precast concrete pipe applications is recommended.
  
  
• Format:
  PDF
• Funding:
  BDK75 977-29
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:54bd3436d57fc3d8c0dea840f26c7716403fcadf79ece5563561a4a211ba642d
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24216/dot_24216_DS1.pdf
• File Type:
  [PDF - 5.35 MB ]