NEXTGEN Concrete – Tests of the Future: Chloride and Sulfate Durability

Details

• Creators:
  Su, Dan ; Gurjar, Ashok H. ; Suksawang, Nakin
• Corporate Creators:
  Embry-Riddle Aeronautical University. Department of Civil Engineering ; Florida Institute of Technology. Civil Engineering Dept.
• Corporate Contributors:
  Florida. Department of Transportation
• Subject/TRT Terms:
  Chloride Content Concrete Durability Tests Evaluation Permeability Resistivity Method Service Life Sulfates
• Publication/ Report Number:
  BEE02
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Draft Final: 8/2022-6/2025
• Corporate Publisher:
  Florida. Department of Transportation
• Abstract:
  To enhance the durability of newly constructed structural elements, FDOT is seeking concrete mixes that are designed and approved based on element type and service conditions. As one of the most important concerns on concrete, the durability of concrete needs to be robustly assessed with a series of screening tests. Specifically, the chloride and sulfate durability need to be further evaluated. FDOT has elected to move forward with the surface resistivity (SR) test method based on AASHTO T358 and bulk resistivity (BR) test method based on AASHTO TP119 for chloride durability assessment. For the sulfate durability assessment, FDOT elected to move forward with the rapid sulfate permeability test method based on a modified ASTM C1202 test method for Rapid Sulfate Permeability Test (RSPT). In order to widely deploy these test methods for chloride and sulfate durability, we need to choose appropriate thresholds. In addition, to fully assess the durability of concrete mixes with Supplementary Cementitious Materials (SCM), 56-day result need to be obtained and its correlation with 28-day result need to be studied. The research team has performed SR, BR, RSPT, and length change test (ASTM C1012) for 31 selected concrete mixes and the thresholds were selected and proposed for SR, BR, and RSPT tests. A series of prediction equations were also developed to predict the 56-day result based on 28-day testing result.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8cae6373926fbd878a780fb0fabd50c44b48493ae19a3a36eae5c586243b3647765e4d1664a350adb807e5b5eef08059cdd53a0ad918fefd1575029f48db8b67
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89405/dot_89405_DS1.pdf
• File Type:
  [PDF - 12.55 MB ]