DISCUSSION OF BUILDING DAMAGE FROM EXPANSIVE STEEL SLAG BACKFILL

THE RESULTS ARE DESCRIBED WHERE AN UNTREATED STEEL SLAG BACKFILL INCREASED IN VOLUME, IRREGULARLY, AND CAUSED CONSIDERABLE DAMAGE TO THE FLOOR AND WALLS OF A ONE-SOTRY INDUSTRIAL BUILDING. THE DISCUSSER WAS ASSOCIATED WITH TWO INVESTIGATIONS OF SIMILAR DAMAGE TO SIMILAR ONE-STORY INDUSTRIAL BUILDINGS: THE CAUSE WAS BACKFILL FROM A WASTE DUMP ATTACHED TO A CHROMATE ORE PROCESSING PLANT. ALTHOUGH THE TWO BUILDINGS WERE EIGHT MILES APART, THE FILL MATERIAL USED CAME FROM THE SAME LIGHT WEIGHT, POROUS, WELL-GRADED INORGANIC WASTE MATERIAL THAT PASSED ALL THE TEST REQUIREMENTS FOR PROVIDING A DENSE, NOT TOO HEAVY, EASILY COMPRESSIBLE LAYER HAVING GOOD SUPPORTING VALUE WHEN LAID ON THE MARSHY, SATURATED SOIL. HOWEVER, THE VOLUME OF THE NEW FILL INCREASED RAPIDLY WHEN COVERED BY THE NEW CONSTRUCTION AND WHEN IT WAS WETTED BY GROUND WATER RISING INTO IT. BUILDING DAMAGES ARE SHOWN IN A FIGURE. SEVERAL OTHER EXAMPLES ARE PRESENTED OF STRUCTURAL FAILURE FROM FILLS. CHEMICAL ANALYSIS OF THE CHROMATIC FILL LAYER SHOWED, AS PERCENTAGE OF DRY WEIGHT, OXIDES OF: CALCIUM 10; MAGNESIUM 3; IRON 32.6; SILICON 5; AND CHROMIUM 9.6. SAMPLES COMPACTED INTO MOLDS AND OVEN TREATED HEAVED 7% OF THE HEIGHT. SAMPLES SWELLED 2% ON WETTING AND SHRANK 1% ON SUBSEQUENT DRYING. CONDITIONS OF THE BUILDINGS SHOWED GREAT DISTORTION AND COLUMNS SHOWED TIPPING CHANGES OF AS MUCH AS 0.25 INCHES PER FEET OF HEIGHT. RECONSTRUCTION COSTS TO PROVIDE A STABLE BUILDING WERE PROHIBITIVE AND NO SOIL STABILIZATION METHOD COULD MASK THE EXPANSIVE PROPERTIES OF THE CHROMATE FILLS. REFERENCES: BUILDING DAMAGE FROM EXPANSIVE STEEL SLAG BACKFILL, CARL B. CRAWFORD, KENNETH N. BURN, ASCE PROCEEDINGS PAPER 6879, NOVEMBER, 1969.

  • Supplemental Notes:
    • Vol 96, No SM4, PP 1470-1473, 1 FIG
  • Discussers:
    • FELD, J
  • Publication Date: 1970-7

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Filing Info

  • Accession Number: 00235769
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 5 1970 12:00AM