THE BEHAVIOUR OF ZINC IN CEMENT PASTES

COMPORTEMENT DU ZINC DANS LES PATES DE CIMENT

Details are given of test results concerning the behaviour of zinc coated with a paste of pure cement or with concrete. Preliminary tests conducted on white cement pastes helped to set up tests for conventional cements. When zinc comes into contact with concrete it becomes covered with a protective calcium hydroxy zincate compound which increases the adhesion of concrete to the reinforcement. In the case of cement with a high alkali content, zinc oxide is formed to the detriment of the hydroxy zincate which however is present in noticeable quantity, but this leads to more severe risks of attack of certain areas localized on the surface. In concrete the preliminary chromatation treatment of the reinforcement only slows down the rate of growth of hydroxy zincate and tends to favour the formation of zinc oxide. Chloride ions do not affect the formation of hydroxy zincate. If galvanized reinforcement is used in good quality concrete zinc protection gives an excellent guarantee against highly aggressive environments. (TRRL)

• Corporate Authors:

  Societe d'Editions Scientifiques, Tech & Artisti

  19 rue Lafayette
  Paris 9e,   France 
• Authors:
  • Arligue, G
  • Duval, R
  • Longuet, P
• Publication Date: 1979

Language

• French

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 201-206
• Serial:
  • Revue Mater Constr & Trav Pub 'Ciments & Betons'
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Adhesion; Alkali; Calcium; Cement paste; Chemical reactions; Chromium; Coatings; Concrete; Corrosion; Corrosion protection; Galvanized metals; Halides; Oxides; Prevention; Reinforcement (Engineering); Reinforcing materials; Tests; Zinc
• Old TRIS Terms: Alkalies
• ITRD Terms: 7353: Alkali; 7178: Calcium; 4767: Cement paste; 7149: Chromium; 3612: Coating; 4755: Concrete; 5252: Corrosion; 7314: Halide; 7372: Oxide; 9149: Prevention; 3471: Reinforcement (in mater); 6255: Test; 7189: Zinc
• Subject Areas: Geotechnology; Highways; Materials; Planning and Forecasting; Security and Emergencies; I32: Concrete; I34: Steels and Metals; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00331152
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Aug 15 1981 12:00AM