GENERAL

Backer rod for contraction joints shall meet the requirements of applicable Iowa Department of Transportation Specifications.

ACCEPTANCE

Backer rods for all types of poured sealers is based on manufacturer and brand name approval. Approved backer rods for cold-pour sealers are listed in Appendix A. Approved backer rods for hot-pour sealers are listed in Appendix B. Approved manufacturers and products are listed in the Materials Approved Products Listing Enterprise. (MAPLE)

MANUFACTURER AND BRAND NAME APPROVAL

Manufacturer and brand name approval will be based on test results obtained on samples submitted by the manufacturer to the Construction and Materials Bureau for testing. Samples submitted for testing shall be at least 2 feet (0.5 m) in length. Changes in the brand product or characteristics will require a new brand approval.

An approval will remain in effect unless withdrawn because of deficient test results on monitor samples.

MONITOR SAMPLING AND TESTING

The Construction and Materials Bureau may sample at the job site, supplier, or source, and test to verify compliance with the specifications. The Construction and Materials Bureau will notify the appropriate District Materials Office when samples are to be obtained.