Assessment of ASTM D 6690-12 type II and type IV joint sealers.
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Assessment of ASTM D 6690-12 type II and type IV joint sealers.

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English

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  • Abstract:
    To address the issue of water infiltration and debris retention, bi

    tuminous crack sealers and fillers have been

    developed to help prevent premature pavement distress. If applied appropriately, crack sealers and fillers can

    significantly extend the life of a pavement. To utilize crack sealers and fillers properly, one mu

    st understand that

    sealers and fillers differ in application and material types. Crack sealers are typically used on cracks that move

    more than one

    -

    eighth inch, with the intention to prevent water and debris from entering the pavement structure.

    The rigo

    rous installation process involves thorough crack preparation followed by placement of high elongation

    material in a specific configuration. Crack fillers generally use a stiffer material than crack sealers and are typically

    used on non

    -

    working cracks

    The

    purpose of this study was to examine and evaluate the constructability, overall performance and cost

    effectiveness of AASHTO M324

    -

    12 Type II versus IV Joint Sealers. Research personnel assessed each product’s

    durability at each location. Cracks were fil

    led according to the project plans. Efforts were made to provide a

    comparative analysis with regard to performance and cost of both material types by minimizing application

    variations in weather conditions, equipment used, and application crewmembers by a

    pplying material on the same

    day and/or conditions.

    Over a

    three

    -

    year

    span and six data collection timeframes, the type IV material resulted in an average of a

    10% less allowance of water passage through the length of a filled crack. A ten percent better

    performance of a

    material over a comparable alternative is considerable and should not be ignored, and results in approximately 2

    feet less of compromised length of a full width transverse crack

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