This standard describes a procedure for determining shop or field conformance to a specified coating dry film thickness (DFT) range on ferrous and non-ferrous metal substrates using two types of nondestructive coating thickness gages (Type 1, magnetic pull-off, and Type 2, electronic) described in ASTM D7091
This Guide is intended for owners, consultants, and contractors who perform condition surveys and write maintenance coating programs. It is not intended to be a do-it-yourself guide but is representative of the processes that a coating specialist (such as a Protective Coating Specialist [PCS] certified by AMPP) would follow to develop a maintenance coating plan for specific facilities.
This technical report discusses equipment, procedures, materials, and the resulting substrate conditions involved in a variety of WAB cleaning methods currently available for commercial use. It also discusses the effect that the water present with these wet cleaning methods has on achieving the defined degree of cleaning of steel surfaces in accordance with the wet abrasive blast cleaning standards found in the list of Referenced Standards and Other Consensus Documents. It is intended for use primarily by specifiers, owners, painting contractors, inspectors, and others involved in surface preparation of industrial structures.
This report was originally issued in 1998 and has been revised to include additional configurations of equipment setup as well as current (2022) developments in the design of wet abrasive blast cleaning systems and nozzles. This TR provides a foundation to assist users to determine the quantity and quality of water, abrasive, and air.
Concrete surface preparation differs from surface preparation of steel, mostly due to the inherent properties of concrete.
Concrete is a non-uniform mixture of porous, permeable materials (cement, sand, stone, additives, water) with low tensile strength and often numerous cracks and defects. It will vary in properties, including moisture content, from site to site and within any site due to the batched nature of its production and installation.
Ranging from the basics of corrosion in reinforced concrete to using forensic science to determine concrete coatings failure, in this Standards and Best Practice for Surface Preparation and Coating Application of Concrete reference book, students and technicians learn problem solving via multiple case studies and technical artiles.
2022 AMPP, black and white, soft cover, 358 pages.
Fiber-reinforced polymer (FRP) strengthening has become a common technique used by many State Departments of Transportation (DOTs) around the country to address deficiencies with bridge structures. Carbon fiber strengthening systems are routinely used to strengthen pier caps, pier columns, concrete girders, impact damaged girders, and now steel structures. The paper will introduce the audience to the materials and the unique characteristics that make them so prized for repair and strengthening applications in civil infrastructure applications. Their use in bridge projects will be highlighted.
Over 30 percent of the 607,000 bridges in the FHWA National Bridge Inventory have steel superstructures. Most of those are protected from corrosion damage by thin film coatings or paints. Those coatings have a finite life in relation to the steel they protect. Over time, they degrade, eventually requiring repair or replacement. When selecting this type of superstructure for a bridge, the operating agency incurs an obligation to maintain the coating on the steel to protect it from corrosion to obtain its full service life.
This discussion will review case studies from several bridge access projects where suspended scaffolding was used to provide safe, economical access for crews performing inspection, structural repair, demolition, blasting and coating work. Special attention will be paid to advanced project planning, worker safety requirements, unique platform configurations and productivity improving tips.
There are several thousand bridges that are scheduled for maintenance painting both in the State of Tennessee and Missouri. The Caruthersville Bridge (I-155 Mississippi River Bridge) is an on-going project, which is the northern-most bridge over the Lower Mississippi River, with the combined flow of the Upper Mississippi and the Ohio River.