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11635RE: [engineeringcivil] Re: core test failure of 36/20 i.e. 45N/Sqmm

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  • amir khaliq
    Feb 6, 2013
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      according to astm c-42 if  l/d is 1 then correction facor is 0.87

      according to bs-1881;part 120;1983  if l/d is 1 then correction factor is 0.80

      with best wishes

      amir khaliq

      To: engineeringcivil@yahoogroups.com
      From: tsm2k5@...
      Date: Tue, 5 Feb 2013 20:30:45 -0800
      Subject: Re: [engineeringcivil] Re: core test failure of 36/20 i.e. 45N/Sqmm



      my question is if l/d is 1 whats the correctin factor? is it .87 or 1?

      With Best Regards,
      Subhramanyam Tummi,

      From: Sakthi Vel <sweetheart.vel@...>
      To: engineeringcivil@yahoogroups.com
      Sent: Tuesday, 5 February 2013 12:38 PM
      Subject: Re: [engineeringcivil] Re: core test failure of 36/20 i.e. 45N/Sqmm

          L/d ratio is core cutting L means length d means Dia of core  refer is Code 516

      On Mon, Feb 4, 2013 at 11:49 AM, Yasela Sumanasinghe <yasela_s@...> wrote:
      In this case my advise is to revisit the design and find out the actual safety margin it has. If the design is marginal design , probably you may have to demolish the structure and replace it. Otherwise , if design has a larger safety margin you can adopt a schemed hammer test to test the concrete consisitany, strength. Then you have to justify that the achieved concrete strength is acceptable forparticular applied loads. In this case you may have to provided a design justification on concrete uls design as well as crack widths, early thermal cracking etc.

      Yasela Sumanasinghe
      B.Sc.Eng. (Hon.), P.G.Dip (Mgt.), M.Sc.(Australia), C.Eng, MIESL
      Structural Bridge Engineer

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