COATING STRUCTURAL CONCRETE, PART I

Concrete is the most widely used engineering material of construction. This article considers coatings on structural concrete, discussing the composition of this substrate, its specific vulnerabilities (deterioration of concrete, sulfate attack, and carbonation), surface preparation techniques (mechanical scarification, acid etching, and removing surface contaminants), associated difficulties, and the consequences of insufficiencies in these practices. Concrete is not an ideal substrate for coating. Its surface is made up of gradations of cement paste and mortar skin layers, some of which are 5 mm thick. These skin layers must be broken up and the upper layers removed before bonding may succeed. Blast cleaning effectively performs this role. The sealer or primer coating must penetrate the upper layers and capillaries of the blasted substrate as effectively as possible, displacing water if necessary. This penetration is necessary to properly stabilize these surfaces before applying the full coating system. The surface is thus rendered at least partially organic, facilitating adhesion of the subsequent organic coating system.

  • Availability:
  • Supplemental Notes:
    • Page Range: pp 49-50, 53, 55-60, 63-67
  • Corporate Authors:

    Technology Publishing Company

    2100 Wharton Street, Suite 310
    Pittsburgh, PA  United States  15203
  • Authors:
    • Hare, C H
  • Publication Date: 1999-3

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00762826
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 21 1999 12:00AM