WHY DOES A CEMENT PASTE RING CRACK?

SAIT-ON POURQUOI UN ANNEAU DE PATE DE CIMENT FISSURE.

THE AUTHOR EXAMINES THE PRACTICAL SIGNIFICANCE OF THE FISSURATION RING TEST (AFNOR P 15-434) AND HOW WELL IT REPRESENTS THE CRACKING BEHAVIOUR OF CEMENTS WHICH DEPENDS ON THE MECHANISM CAUSING CRACKS: HYDRAULIC SHRINKAGE OR SHRINKAGE ARISING FROM HYDRATION. FOR HYDRAULIC SHRINKAGE, IT IS SHOWN THAT THE INFLUENCE OF CEMENT RESPONSIVE TO THE TEST CONDITIONS ON CRACKING CAN BECOME NEGLIGIBLE IN LARGE CONCRETE MEMBERS AND WOULD NOT THEREFORE CHARACTERISE THE FISSURATION BEHAVIOUR OF CEMENT. THE SHRINKAGE LINKED WITH HYDRATION WOULD CONCERN THE ENTIRE MASS AND WOULD AFFECT ALL CONCRETE MEMBERS CAUSING IN PARTICULAR MICRO-FISSURES AROUND THE AGGREGATES. THE AUTHOR CONCLUDES BY STATING THAT AN INVESTIGATION IS NECESSARY TO DETERMINE THE RELATION BETWEEN THE INFLUENCE OF HYDRATION AND THAT OF EVAPORATION.

Language

  • French

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Filing Info

  • Accession Number: 01296727
  • 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 6:02AM