In-track Inspection of Four Year Old ACZA Treated Hardwood Ties

摘要

While ACZA's predecessor, Arnmoniacal Copper Arsenate (ACA) successfully protected Douglas fir ties back in 1940's, and more recently Arnmoniacal Copper Zinc Arsenate (ACZA) has protected Douglas fir bridge timbers an crossties, ACZA has never been usedfor hardwood ties. Ongoing lab testing continues to confirm that ACZA is a preservative system which deserves consideration for protecting hardwood ties. In addition, its performance in treating difficult or refractory species of wood has been documentedthrough its wide range of uses approved in the AWPA However, commercial treatment, installation and successful performance in active railroad track is the ultimate test for crossties. Mississippi State University was retained to perform in track inspections on ties previously installed and to sample test ties for future analysis.