IMPROVEMENT IN FERRO-CEMENT STRUCTURES

STRUCTURAL DEFECTS IN FERRO-CEMENT MIXTURES CAUSED BY THE PRESENCE OF HYDROGEN BUBBLES WERE INVESTIGATED AND A FABRICATION PROCESS WHICH RESOLVED THE PROBLEM WAS DEVELOPED. THE GENERATION OF HYDROGEN BUBBLES WAS ATTRIBUTED TO A GALVANIC CELL ACTION. THE HORIZONTAL FABRICATION OF FERRO-CEMENT PANELS WOULD FACILITATE THE EMERGENCE OF THE GAS AT SOFT OR LESS DENSE LOCATIONS. THE PROCESS MAY BE GUARANTEED BY VIBRATION OF THE PANEL. A NUMBER OF SOLUTIONS TO THE GALVANIC CELL PROBLEM ARE SUGGESTED. THEY ARE, ELIMINATION OF DISSIMILAR METALS BY THE USE OF BLACK STEEL (UNGALVANIZED) REINFORCING BARS WITH UNGALVANIZED MESH AND THE USE OF GALVANIZED REINFORCING BARS WITH GALVANIZED MESH; INSULATION OF BLACK STEEL BARS WITH A PROTECTIVE COATING; AND THE CHEMICAL INHIBITION OF GALVANIC CELL ACTION. THE PREFERENCE FOR THE USE OF GALVANIZED WIRE OR MESH IS EXPRESSED. THE METHOD OF INSULATION OF BLACK STEEL BARS WAS CONSIDERED TEDIOUS AND SOMEWHAT UNCERTAIN. THE CHEMICAL INHIBITION METHOD WAS CONSIDERED MOST EXPEDIENT AND DEPENDABLE AND THE ADDITION OF CHROMIUM TRIOXIDE IS RECOMMENDED. VISUAL OBSERVATIONS, BONDING CHARACTERISTICS AND FLEXURE TEST RESULTS REFLECTED FAVORABLY ON THE USE OF CHROMIUM TRIOXIDE.

  • Corporate Authors:

    Naval Research Reviews

    ,    
  • Authors:
    • Christensen, K A
    • Williamson, R B
  • Publication Date: 1972

Media Info

  • Features: Figures;
  • Pagination: p. 1-11
  • Serial:
    • Volume: 25
    • Issue Number: 4

Subject/Index Terms

Filing Info

  • Accession Number: 00214225
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 5 1973 12:00AM