Location

London

Event Website

http://www.csce2016.ca/

Description

Corrosion of steel reinforcing bar (rebar) is the most significant cause of concrete failure, resulting in expensive repairs and premature structure replacements across the country. This paper will discuss a new, low-cost, zinc coating process for rebar. The properties of this new coated rebar and its contribution to improvement of concrete performance will be presented together with the status of related national and international standards. The Continuous Galvanized Rebar (CGR) coating process is similar to galvanizing of sheet steel. The zinc coating is durable and resistant to abrasion that is routine during transport and construction, but is also highly ductile and can be bent without cracking to diameters of less than 4x the rebar diameter. This property ensures the bars can be coated pre-fabrication, reducing cost and speeding construction schedules. Once in the concrete, the zinc coating protects the rebar both as a barrier coating and with the well-known sacrificial properties of a galvanized coating.


Share

COinS
 
Jun 1st, 12:00 AM Jun 4th, 12:00 AM

MAT-735: OPTIMIZING PERFORMANCE OF ZINC COATED REINFORCING STEEL IN CONCRETE STRUCTURES

London

Corrosion of steel reinforcing bar (rebar) is the most significant cause of concrete failure, resulting in expensive repairs and premature structure replacements across the country. This paper will discuss a new, low-cost, zinc coating process for rebar. The properties of this new coated rebar and its contribution to improvement of concrete performance will be presented together with the status of related national and international standards. The Continuous Galvanized Rebar (CGR) coating process is similar to galvanizing of sheet steel. The zinc coating is durable and resistant to abrasion that is routine during transport and construction, but is also highly ductile and can be bent without cracking to diameters of less than 4x the rebar diameter. This property ensures the bars can be coated pre-fabrication, reducing cost and speeding construction schedules. Once in the concrete, the zinc coating protects the rebar both as a barrier coating and with the well-known sacrificial properties of a galvanized coating.

http://ir.lib.uwo.ca/csce2016/London/Materials/24