***GENERAL REWRITE – PLEASE READ CAREFULLY.***
GENERAL
This IM covers the requirements for becoming approved to supply epoxy powder to coaters for use on Iowa DOT projects. Approved manufacturers of epoxy powder and the associated patching repair compounds are found in the Materials Approved Products Listing Enterprise (MAPLE).
APPROVAL PROCESS
Prior to furnishing epoxy powder to coaters for Iowa DOT projects, the powder manufacturer shall submit the following:
1. A written application by the company to become an approved powder manufacturer shall be submitted to the Office of Construction and Materials in Ames, Iowa.
2. Product information, specifications, and recommended application procedures, including minimum gel and cure time
3. A fingerprint sample of the powder, product name and number, and manufacturer name. The sample shall be 100 gm (3.5 oz.).
4. Prequalification shall be in accordance with ASTM D3963/D3963M and ASTM A775/A775M.
Upon satisfactory review of this application the company will be placed on the approved list.
PATCHING MATERIAL APPLICATION
Patching Materials shall be compatible with the epoxy coating inert in concrete and feasible for field application.
Manufacturer shall specify the method of metal surface preparation and patching (repair) application procedures.
Patching (repair) materials shall be applied according to manufacturer’s recommendations.