Investigation of material improvements to mitigate the abrasive wear mechanism of concrete crosstie rail seat deterioration (RSD).

Details

• Creators:
  Edwards, J. Riley ; Lange, David A.
• Corporate Creators:
  NEXTRANS Center (U.S.)
• Corporate Contributors:
  United States. Dept. of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Concrete ties
  • Abrasion
  • Deterioration
  • Tie pads
  • Admixtures
  • Mix design
  • Fine aggregates
  • Service life
• Publication/ Report Number:
  NEXTRANS Project 0931Y04
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  NEXTRANS Center (U.S.)
• Abstract:
  To meet the increasingly stringent design and performance requirements due to increasing cumulative ; gross tonnages from heavy-haul freight operations, along with increased high-speed inter-city passenger ; rail development, improvements in concrete crosstie designs are needed. Rail Seat Deterioration (RSD) ; continues to be identified as one of the primary factors limiting concrete crosstie service life in North ; America. RSD refers to the degradation of material at the contact interface between the concrete ; crosstie rail seat and the rail pad that protects the bearing area of the crosstie. Industry experts ; consider abrasion to be a viable mechanism leading to RSD. A lack of understanding of the complex ; interactions affecting the severity of abrasion has resulted in an iterative design process for concrete ; crossties and fastening systems. The objective of this study is to quantify the abrasion performance of ; rail seats by using a variety of concrete admixtures and materials. To simulate the abrasive wear ; mechanism of RSD, a Small-Scale Abrasion Resistance Test (SSART) was designed by researchers at UIUC. ; Additionally, a theoretical framework to model and predict abrasive wear was developed using ; statistical techniques. Data obtained from the SSART and the statistical model will help the rail industry ; mechanistically design concrete crossties by improving the current understanding of the performance of ; concrete crosstie mix designs. Preliminary results show that the addition of metallic fine aggregates ; (MFA), steel fibers, and the application of coatings improve the abrasion resistance of concrete ; specimens
  More +
• Format:
  PDF
• Funding:
  DTRT07-G-005
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28198/dot_28198_DS1.pdf
• File Type:
  [PDF - 709.70 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:a3318715880b32a515f29f0aa6f1cb67c1867b1f896bf0978a158abe90f9cc26