THE EFFECT OF AGGREGATE TYPE ON CONCRETE SHRINKAGE

THE AGGREGATE TYPE AFFECTS THE OVERALL DRYING SHRINKAGE OF CONCRETE, BUT THE POSSIBLE MAGNITUDE OF THE EFFECT APPEARS TO BE LESS WELL APPRECIATED. THE MOST IMPORTANT PROPERTY OF THE AGGREGATE IN THIS RESPECT IS ITS DRYING SHRINKAGE, ALTHOUGH VARIATIONS IN ELASTIC MODULUS CANNOT BE DISREGARDED. THE PROBLEM OF CONCRETE DETERIORATION DIRECTLY ATTRIBUTABLE TO DIMENSIONAL CHANGES IN THE AGGREGATE WAS DESCRIBED BY STUTTERHEIM. HE INVESTIGATED THE CRACKING AND DEFLECTION OF REINFORCED CONCRETE STRUCTURES IN CERTAIN AREAS IN SOUTH AFRICA, AND SHOWED IT TO BE DUE TO EXCESSIVE MOISTURE MOVEMENT OF THE AGGREGATE, WHICH EXHIBITED LENGTH CHANGES OF UP TO 0.12% ON DRYING FROM A SATURATED CONDITION. SNOWDON, EDWARDS, JENKINS, PLOWMAN, AND HASELTINE INVESTIGATED SIMILAR CONCRETE DETERIORATIONS WHICH WERE DUE TO SCOTTISH DOLERITE AGGREGATES. /RRL/

  • Supplemental Notes:
    • Vol Ii, No 4, PP 72-74, 1 TAB, 6 REF
  • Corporate Authors:

    New Zealand Concrete Construction

    ,    
  • Authors:
    • SMITH, L M
  • Publication Date: 1967-4

Subject/Index Terms

Filing Info

  • Accession Number: 00212822
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jul 22 1994 12:00AM