THE EFFECT OF CEMENT TYPE, AGGREGATE TYPE AND MIX WATER CONTENT ON THE PROPERTIES OF LEAN CONCRETE MIXES

DETAILS ARE PRESENTED OF PRELIMINARY TESTS CARRIED OUT TO ASSESS THE EFFECT OF INTRODUCING CHANGES IN THE COMPOSITION OF LEAN CONCRETE MIXES SUITABLE FOR USE IN ROAD BASE CONSTRUCTION. IT IS SHOWN THAT SUBSTANTIAL CHANGES IN THE STRENGTH AND ELASTIC PROPERTIES, ESPECIALLY AT EARLY AGES, CAN BE PRODUCED BY USING CEMENTS OTHER THAN ORDINARY PORTLAND CEMENT AND THEIR PRACTICAL IMPLICATIONS ARE DISCUSSED. THE EFFECT OF USING CRUSHED GRANITE AGGREGATE INSTEAD OF IRREGULAR GRAVEL AND NATURAL SAND IS EXAMINED USING CONSTANT MIX PROPORTIONS. THE USE OF GRANITE AS THE COARSE AGGREGATE, AS THE COARSE AGGREGATE AND PART OF THE FINE AGGREGATE, AND FINALLY AS THE WHOLE OF THE AGGREGATE PRODUCES SUCCESSIVE CHANGES IN THE PROPERTIES MEASURED. THE WORKABILITY IS REDUCED, THE COMPRESSIVE AND FLEXURAL STRENGTHS ARE INCREASED BUT THE ELASTIC PROPERTIES ARE NOT GREATLY AFFECTED. AN INCREASE IN MIX WATER CONTENT TO A VALUE WHICH WOULD PERMIT COMPACTION BY SURFACE VIBRATION RATHER THAN BY ROLLING IS SHOWN, FOR A GIVEN CEMENT CONTENT, TO CAUSE A SUBSTANTIAL REDUCTION IN STRENGTH AND AN APPRECIABLE REDUCTION IN THE ELASTIC MODULUS. RELATIONSHIPS ARE SUGGESTED BETWEEN THE MAIN PROPERTIES EXAMINED AND AN INDICATION IS GIVEN OF THE EFFECT OF MIXING ACTION AND OF COMPACTION ON THE REPRODUCIBILITY OF RESULTS. /RRL/A/

  • Supplemental Notes:
    • Vol 46, No 542, PP 34-42, 9 FIG, 3 TAB, 24 REF
  • Authors:
    • Williams, R I
    • Patankar, V D
  • Publication Date: 1968-2

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Filing Info

  • Accession Number: 00212939
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Aug 17 1970 12:00AM