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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
    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
    26
May
2017
Research Results
Industry Survey of Bolsters and Side Frames Removed from Service
Author
          Federal Railroad Administartion

Subject
                    Best Practices,
                    Facilities & Test Equipment,
                    Rolling Stock

**Keywords:** Bolster, side frame, casting, survey, steel
**Abstract:** Transportation Technology Center, Inc. (TTCI) conducted an industry survey of defective bolsters and side frames removed from service. Scrapped components (approximately 70...
Report Number
              RR 17-07

  Office
              RDI-22
    13
Jan
2017
Technical Reports
Weld Repair of Manganese Frogs for Enhanced Performance
Author
          Federal Railroad Administration

Subject
                    Best Practices,
                    Rail and Infrastructure Integrity,
                    Track

**Keywords:** Reciprocating wire feed, constant voltage, Flux-Cored Arc Welding, heat-affected zone, radiographic testing, Shielded Metal Arc Welding, ultimate tensile strength, yield strength.
**Abstract:** When special trackwork contact surfaces (such as manganese-steel turnout frogs) become worn and damaged, they can be repaired to extend their lifetime, but current repair...
Report Number
              DOT/FRA/ORD-17/01

  Office
              RRD

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