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  • Users: shazi1
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  1. shazi1

    Difference between Target strength & Target Mean Strength

    What is difference between Target Strength and Target Mean Strength ??? As for required strength (Target strength) is given as (Characterstics strength + 1.64 * S.d).. this 1.64 may vary as depending on different criteria. I had also seen some specs defining Target mean strength with totally...
  2. shazi1

    CBR value

    For pavement design we have backfill material with ascending values of CBR, eg. subgrade CBR: 15 %, Aggregate Base 80%. What will be effects if bottom layer has high CBR with respect to succeeding layer? Also,I want to know what is significance of permeability of soil ??
  3. shazi1

    compressive strength

    Recently I come across 2 concrete core test results (tested in different dates) where 28 days strength was lower by 10 MPa to 7 days... I do not have any justification to it, only reason can be honeycomb or air voids, or low quality aggregates used for concrete.. but this cases are not...
  4. shazi1

    7 days compressicve strength of concrete core is higher to 28 days.. surprising?

    Recently I come across 2 concrete core test results (tested in different dates) where 28 days strength was lower by 10 MPa to 7 days... I do not have any justification to it, only reason can be honeycomb or air voids, or low quality aggregates used for concrete.. but this cases are not...

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