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52550
  
  

  10
May
2019
Research Results
Determining Bond-Slip Characteristics of Prestressing Tendons with Varying Geometries in Two Concrete Mixtures
Author
          Federal Railroad Administration

Subject
                    Tracks & Structures

**Keywords:** Track, ties, concrete, bond-slip, prestressing tendons
**Abstract:** Untensioned pullout tests were conducted to obtain the bond-slip characteristics of two groups of prestressing tendons used in concrete railroad tie production. The purpose of...
Report Number
              RR 19-13

  Office
              RDI-21
    19
Apr
2019
Research Results
Impact of Water on Cracked Concrete Crosstie Service Life
Author
          Federal Railroad Administration

Subject
                    Tracks & Structures

**Keywords:** Concrete crossties, water damage, center cracks, cyclic loading
**Abstract:** To investigate the impact of moisture on crack growth and other tie damage, UIUC researchers subjected pretensioned concrete crossties and small-scale beams to repeated loading...
Report Number
              DOT/FRA/ORD-19/11

  Office
              RDI-21
    9
Apr
2018
Technical Reports
Rail Base Corrosion and Cracking Prevention: Phase 2
Author
          Federal Railroad Administration

Subject
                    Rail and Infrastructure Integrity

**Keywords:** Corrosion, rail, rail base corrosion, coatings, corrosion testing, premature rail failure
**Abstract:** In March 2014, EWI was engaged by the Federal Railroad Administration to research rail treatments to prevent rail base corrosion in corrosive environments.  A coating system was...
Report Number
              DOT/FRA/ORD-18/09

  Office
              RDI-21
    29
Sep
2017
Technical Reports
A Survey of Wheel/Rail Friction
Author
          Federal Railroad Administration

Subject
                    Track,
                    Tracks & Structures,
                    Track/Train Interactions

**Keywords:** Friction, friction management, lubrication, vehicle-track interaction, wheel-rail interaction v
**Abstract:** Friction has a huge influence on the vehicle/track interaction and yet it remains poorly understood, its consideration an afterthought in many simulation activities. This survey...
Report Number
              DOT/FRA/ORD-17/21

  Office
              RDI-21
    15
Sep
2017
Technical Reports
Monitoring Longitudinal Rail Stress Using Diffuse Ultrasonic Backscatter
Author
          Federal Railroad Administration

Subject
                    Rail and Infrastructure Integrity

**Keywords:** stress in rail; ultrasonic transducers; ultrasound scattering; theoretical model of the scattering process; prototype devices for stress estimations in rail; laboratory and field tests
**Abstract:** In this report, research was conducted at the University of Nebraska-Lincoln pertaining to the use of ultrasound scattering from polycrystalline grains to estimate and monitor...
Report Number
              DOT/FRA/ORD-17/15

  Office
              RDI-21

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