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Assessment of Techcrete : a concrete repair material and joint sealant.
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  • Abstract:
    Joint sealing and resealing is a commonly performed concrete pavement maintenance activity that serve



    purposes. First, it minimizes water infiltration; second, it prevents intrusion of solid materials in the joints. There

    are many sealants available for resealing concrete joints including hot


    poured, rubberized asphalt sealants and

    silicone sealants

    . According to a Federal Highway Administration technology brief, “the hot


    poured, rubberized

    asphalt sealants are less expensive than silicone materials but generally have shorter life expectancies (typically, 4

    to 8 years for hot


    poured sealants and 5 t

    o 10 for silicone sealants) [1].

    In the fall of 2007, the City of Winooski resealed some of the pavement joints located along US Route 2 and 7 as

    part of their periodic preventative maintenance work, with a new hot


    poured product, TechCrete, manufactured


    Crafco. According to Crafco, this flexible material is a hot


    poured product for concrete repairs, which provides high

    tensile strength and high compressive resistance. It is comprised of a combination of several resins, polymers,

    and aggregate. In ad

    dition, it has proven to provide a long


    term life span in most applications. According to the

    manufacturer, once the material has properly cured, the materials will not de


    bond or crack while remaining flexible

    during the expansion and contraction of the

    adjacent concrete slabs. Additionally, the affected lane can be open to

    traffic within one hour of application.

    In 2008, Crafco contacted VTrans to have TechCrete added to the Approved Products list. This study is an

    evaluation of the product. VTran

    s selected the Winooski site and a site in South Burlington where a concrete

    pavement was placed in 1997 that exhibited similar deterioration, to conduct a field evaluation of the product.

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