SOME EXPERIENCES WITH A COMMERCIAL COMPRESSION TESTING MACHINE

THE UNSATISFACTORY BEHAVIOUR OF A COMMERCIAL COMPRESSION TESTING MACHINE LED TO AN INVESTIGATION INTO THE CAUSE OF VARIATION IN TESTING, WHICH IN TURN LED TO THE DISCOVERY THAT THE REMOVAL OF POLAR GREASE LUBRICATING THE BALL-SEAT CONTROLLING THE TOP PLATEN OF THE MACHINE REDUCED VARIATION TO ONE-THIRD OF PREVIOUS VALUES WHILE INCREASING THE MEAN STRENGTH OF A GROUP OF SPECIMENS WITHOUT THE CALIBRATION OF THE MACHINE BEING CHANGED. THE REASONS FOR THIS BEHAVIOUR ARE DISCUSSED AND A RECOMMENDATION GIVEN THAT POLAR GREASES SHOULD NOT BE USED TO LUBRICATE BALL-SEATS IN COMPRESSION TESTING MACHINES. /RRL/A/

  • Supplemental Notes:
    • Vol17, No50, PP45-46, 1FIG, 1REF
  • Authors:
    • Atherton, M J
  • Publication Date: 1965-3

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Filing Info

  • Accession Number: 00216032
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Feb 17 1994 12:00AM