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Averaging Grout T. C.

  • 1.  Averaging Grout T. C.

    Posted 10-24-2019 12:50

    500' vertical bore. 5" borehole. 1.25" pipe. Overburden is 60' with 410' solid granite. Grout for first 60' is TC .7, will use crushed gravel for remaining 410'. I'm trying to figure the T. C. for the crushed gravel ? 

    Is this how to average out the grout TC ?
    .7 divided by 500 x 60 = .08
    1/500 x410 = .82
                          .82 + .08 = .9 average TC ?


    ( if crushed gravel is 1 )

    Any help Much Appreciated. 



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    Ronald Newcomb

    Airmasters HVAC
    Mechanicsville VA
    804-539-2215
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  • 2.  RE: Averaging Grout T. C.

    Posted 10-25-2019 09:25
    The average TC for the borehole is 60/500*0.7+440/500*1 = 0.964


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    Robert Sparks

    VHE Innovations
    Pagosa Springs CO
    970-946-1824
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  • 3.  RE: Averaging Grout T. C.

    Posted 10-25-2019 09:35
    Edited by W. Blake Smith 10-25-2019 09:35
    Please read ANSI/CSA 448
    this is against industry standards. Please dont do this.

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    W. Blake Smith
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