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  • 1.  Mass concrete

    Posted 05-30-2017 08:58 PM
    Hi all,

    Can you recommend a reference to be practiced to define a structural element defined as mass concrete?


    Thanks,
    Ken

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    Lee Keun Ph.D., P.E., M.ASCE
    JACOBS
    Denver CO
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  • 2.  RE: Mass concrete

    Posted 05-31-2017 09:35 AM
    Reference to Mass Concrete:

    1) ACI 207.1R-05 Guide to Mass Concrete Reported by ACI Committee 207


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    Rajayogan Palanichamy P.E., CP, F.ASCE
    Professor Civil Engineering
    Virudhunagar, TN
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    Original Message


  • 3.  RE: Mass concrete

    Posted 05-31-2017 09:35 AM
    I have a copy of ACI 207.2 R-90 entitled "Effects of Restraint, Volume Change, and Reinforcement on Cracking of Mass Concrete. It states in section 1.2 "Definition" Mass Concrete is defined in ACI 116R as "Any volume of concrete with dimensions large enough to require that measures be taken to cope with the generation of heat and attendant volume change to minimize cracking".
    I am not sure this helps as it appears to be subjective.

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    Matthew Beck P.E., M.ASCE
    Engr
    Beck Engineering Pc
    Bondville VT
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    Original Message


  • 4.  RE: Mass concrete

    Posted 05-31-2017 09:35 AM
    I don't work with mass concrete all that much, but the last time I needed to design it, I used the AASHTO Bridge Design Specifications, which go into detail on how to design bridge abutments, which are often mass concrete.

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    Jeanne Rice P.E., M.ASCE
    Project Engineer
    Cohoes NY
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    Original Message


  • 5.  RE: Mass concrete

    Posted 05-31-2017 11:54 AM
    Thank all of you for sharing information. Also, I found FDOT SDG Vol. 1 specifies some dimensionalities defining mass concrete.

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    Lee Keun Ph.D., P.E., M.ASCE
    JACOBS
    Denver CO
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    Original Message


  • 6.  RE: Mass concrete

    Posted 05-31-2017 11:53 AM
    The Florida Department of Transportation provides the following general criteria for designating mass concrete, per section 1.4.4-C.1. of the FDOT Structures Design Guidelines (Structures Manual, Volume 1):

    "When the minimum dimension of the concrete exceeds 3 feet and the ratio of volume of concrete to the surface area is greater than 1 foot, provide for mass concrete. (The surface area for this ratio includes the summation of all the surface areas of the concrete component being considered, including the full underside (bottom) surface of footings, caps, construction joints, etc.) Note volume and surface area calculations in units of feet."
    http://www.fdot.gov/structures/StructuresManual/CurrentRelease/Vol1SDG.pdf

    Of course, appropriate context must always be considered.  The section goes on to list additional criteria and considerations for specific types of elements and high strength concretes.  The extreme heat of the Florida environment may also be a consideration in the selection of this particular criteria.

    Ultimately, while this may be a reasonable starting point for your reference, if you're uncertain or near the threshold (one way or the other), it may be advisable to consult a concrete specialty engineer local to your project.

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    Jeffrey Tuell P.E., F.SEI, M.ASCE
    Structural (Bridge) Engineer
    GAI Consultants, Inc.
    Orlando FL
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    Original Message


  • 7.  RE: Mass concrete

    Posted 06-01-2017 09:16 AM
    This may be a good resource.

    Webinar - June 6: Mass Concrete
    Informz remove preview
    Webinar - June 6: Mass Concrete
    When most people think of mass concrete, the first things that come to mind are large dam projects, such as the Hoover Dam that borders both Arizona and Nevada, and other Corps of Engineer dam projects built in the 1930s through the 1960s.
    View this on Informz >


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    Sung Cho P.E., M.ASCE
    Plant Structural Engineer
    Bothell WA
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    Original Message


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