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Effect of Concrete Composition on Splitting Cracks in Prestressed Concrete Railroad Ties

Document Series
Research Results
Federal Railroad Administration
Report Number
RR 22-05
Subject Track
Prestressed concrete railroad ties, crossties, fracture toughness, longitudinal splitting cracks, crack resistance, splitting resistance

Kansas State University researchers conducted fracture toughness (FT) tests on four, 3-point bending concrete specimens for each mixture type. Next, they fabricated pretensioned prisms with varying amounts of concrete covering the reinforcements. The prism strength was 4,500 psi when de-tensioned. Finally, they quantitatively evaluated the splitting cracks in each specimen by direct measurement of the crack lengths. The results indicated a strong correlation between crack length and FT.

Last updated: Tuesday, March 15, 2022