SOIL STABILIZATION WITH FLY ASH AND ITS RANGE OF USES IN POLAND

BODENVERFESTIGUNGEN MIT FLUGASCHEN UND IHRE VERWENDUNGSMOEGLICHKEITEN IN POLEN

HITHERTO, SOIL STABILIZATION WAS CARRIED OUT IN POLAND MAINLY WITH CEMENT AND LIME. SOME TESTS ON THE REPLACEMENT OF THESE MATERIALS WITH FLY ASH WERE SUCCESSFUL. REGULATIONS DRAWN UP BY THE POLISH CENTRAL ROAD RESEARCH INSTITUTE PERMIT THE WIDESPREAD USE OF FLY ASH, PARTICULARLY OF BROWN COAL FLY ASH FOR THE CONSTRUCTION OF ROAD BASES FOR HIGHWAY PAVEMENTS. COHESIONLESS SOILS, PARTICULARLY SANDS AND GRAVELS OF A HOMOGENEOUS GRANULAR STRUCTURE, ARE IMPROVED WITH THE ADDITION OF FLY ASH AND STRENGTHENED AGAINST THE ACTIONS OF WATER AND FROST. FOR SOIL STABILIZATION WITH CEMENT THE ADDITION OF FLY ASH CAN LEAD TO SAVINGS OF 30 TO 35% OF THE CEMENT. THE TECHNICAL REQUIREMENTS FOR THE FLY ASH ARE DISCUSSED AND ITS SUITABILITY FOR SOIL STABILIZATION DEPENDING ON THE CAO CONTENT BASED ON LABORATORY TEST RESULTS FOR COHESIONLESS SOILS, SILTS, LOAMY SAND AND LOAM. OF PARTICULAR INTEREST IS THE INCREASE IN STRENGTH VALUES OBSERVED IN MOST CASES AND THE CONFIRMATION THAT A HIGHER CAO CONTENT HAS A POSITIVE INFLUENCE ON THE BINDER PROPERTIES. PIT OR SOFT COAL HAS NO BINDING PROPERTIES BECAUSE OF ITS LOW CAO CONTENT. ITS HIGH CONTENT OF SI02, FE203 AND AL203 AFFECTS THE HYDRAULIC PROPERTIES OF COHESIONLESS SOILS. IN THE STABILIZATION OF SILTY SOILS AS A SUB-BASE, THE USE OF BROWN COAL FLY ASH IS RECOMMENDED WITH SIMULTANEOUS ADDITION OF CEMENT.

  • Authors:
    • Gad, W
  • Publication Date: 1976

Language

  • German

Media Info

  • Pagination: 13-8
  • Serial:
    • Tiefbau
    • Volume: 18
    • Issue Number: 1

Subject/Index Terms

Filing Info

  • Accession Number: 01302807
  • Record Type: Publication
  • Source Agency: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)
  • Files: ITRD
  • Created Date: Nov 21 2010 8:49AM