Prestressed Girders for “Change Out” Results in Less Track Downtime
American Concrete Products manufactures prestressed solid slab girders and voided box girders from 10’ 0” to 80’ 0” in length to meet the needs of the railroad industry.
These girders are installed on the precast caps during a specified ‘change out’ window. This window is an exact time frame where the existing bridge is removed and replaced with the new concrete. The time to change out the bridge completely is normally less than 16 hours. The train traffic is back to normal speed as soon as the change out is complete. This is the key to the system. Minimal loss of track time equals little loss of revenue for the railroad.
Contact an American Concrete Products – Railroad Division for more information about how our prestressed girders save time and money.
STANDARD SPECIFICATIONS
C457 – Microscopical Determination of Air-Void Content and Parameters of the Air- Void System in Hardened Concrete
C666 – Resistance of Concrete to Rapid Freezing and Thawing
C114 – Methods for Chemical Analysis of Hydraulic Cement
C1567 – Standard Test Method for Determining the Potential Alkali-Silica Reactivity of Combinations of Cementitious Materials and Aggregate (Accelerated Mortar-Bar Method)
C227 – Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method
C131 – Resistance to Degradation of Small Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
C295 – Recommended Practice for Petrographic Examination of Aggregates for Concrete
C33 – Concrete Aggregates
C40 – Organic Impurities in Fine Aggregate for Concrete
C88 – Soundness of Aggregate by Use of Sodium Sulfate or Magnesium Sulfate
C1260 – Standard Test Method for Potential Alkali Reactivity of Aggregates ( Mortar Bar Method)
C227 – Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method)
C666 – Resistance of Concrete to Rapid Freezing and Thawing
NOTES
- Supplier must be PCI certified to the MNL 116 – Quality Control for Plants and Production of Precast Prestressed Concrete Products.
- Supplier must be certified to the M-1003 Quality Assurance Standard of the Association of American Railroads (AAR).
- Supplier must provide Production Part Approval Process (PPAP) for each item produce as directed by the Railroad Engineer.