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

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  • Subhramanyam Tummi
    Hi, my question is if l/d is 1 whats the correctin factor? is it .87 or 1?   With Best Regards, Subhramanyam Tummi, ... Hi, my question is if l/d is 1 whats
    Message 1 of 5 , Feb 5, 2013
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      Hi,

      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

       
      Hello
       
          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
      SMEC INTERNATIONAL PVT LTD.



    • amir khaliq
      hi. 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
      Message 2 of 5 , Feb 6, 2013
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        hi.

        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

         

        Hi,

        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

         
        Hello
         
            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
        SMEC INTERNATIONAL PVT LTD.




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