THE EFFECT OF SEA WATER ON CEMENT

L'ACTION DE L'EAU DE MER SUR LES CIMENTS

THIS ARTICLE DESCRIBES A STUDY OF THE ACTION OF SEA WATER ON CEMENT FROM THE POINT OF VIEW OF THE MICROSTRUCTURE OF THE MATERIAL. THE FIRST RESULTS OBTAINED WITH AN ELECTRON MICROPROBE, SCANNING ELECTRON MICROSCOPE AND X-RAY DIFFRACTION SHOW THAT THE CHEMICAL AND TECHNOLOGICAL STUDIES CARRIED OUT UP TO NOW NEED TO BE SUPPLEMENTED BY VISUAL METHODS AT THE MICRON SCALE TO STUDY THE TIME-RELATED EVOLUTION OF CRYSTALLINE STRUCTURES. TRICALCIUM ALUMINATE, WHICH IS TRANSFORMED INTO ETTRINGITE, AND LIME WHICH DISSOLVES IN THE PRESENCE OF MAGNESIUM SULPHATE ARE THE TWO MAIN FACTORS IN THE CHEMICAL ATTACK OF PORTLAND CEMENT BY SEA WATER. HOWEVER THE FORMATION OF EXPANSIVE ETTRINGITE IS RELATED TO THE CONTENT IN, CRYSTALLINE SHAPE, PARTICLE SIZE DISTRIBUTION TEXTURE AND FREE SURFACE OF C3A. PORTLAND CEMENT WITH SECONDARY INGREDIENTS SUCH AS SLAG AND POZZOLAN HAS A HIGH RESISTANCE TO SEA WATER.

Language

  • French

Media Info

  • Pagination: 85-102
  • Serial:
    • ANN ITBTP
    • Issue Number: 329
    • ISSN: 0020-2568

Subject/Index Terms

Filing Info

  • Accession Number: 01297174
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:14AM