SALT BURST BY HYDRATION PRESSURES IN ARCHITECTURAL STONE IN URBAN ATMOSPHERE

SALT BURSTS CAN CAUSE EXTENSIVE SPALLING IN STONE STRUCTURES. WATER SOLUBLE SALTS AND HYDRATES OF SODIUM CARBONATE, SODIUM SULFATE AND MAGNESIUM SULFATE ARE TRAPPED IN PORES OF STONE AND CONCRETE BY BOTH INFILTRATION UPWARD FROM THE GROUND AND BY THE REACTION OF CARBONATE AND SILICATE ROCKS WITH SULFURIC AND CARBONIC ACIDS FROM POLLUTED URBAN ATMOSPHERES. THE CRYSTALLIZATION OF THE SALTS AND THEIR RECRYSTALLIZATION FROM A LOWER TO A HIGHER HYDRATE WITHIN THE RANGE OF MINERAL STABILITY MAY DEVELOP STRESSES OF HIGH MAGNITUDE. THEORETICAL BURSTING PRESSURES WERE CALCULATED THERMODYNAMICALLY FROM VAPOR PRESSURES OF THE HYDRATES AND FROM HUMIDITIES OF THE AIR FOR SEVERAL AIR TEMPERATURES. /AUTHOR/

  • Supplemental Notes:
    • Vol 81, No 2, PP 567-572, 4 FIG, 4 TAB
  • Authors:
    • Winkler, E M
    • Wilhelm, E J
  • Publication Date: 1970-2

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Filing Info

  • Accession Number: 00237820
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 16 1970 12:00AM