ASTM E736-00 Cohesion/Adhesion of Fire-Resistive Materials

ASTM E736-00 Cohesion/Adhesion of Fire-Resistive Materials

ASTM E736 test technique describes how to measure the cohesion/adhesion or bond strength (tensile) of sprayed fire-resistive material (SFRM) applied to stiff backing perpendicular to the surface. The values stated in SI should be considered as standard.

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    Scope:

    ASTM E736 test method purpose is to identify an SFRM property that can be utilized to determine its in-place serviceability.

    Procedure:

    A metal or plastic cap with a hook is used to determine cohesion/adhesion. An appropriate adhesive is used to secure the cap on the SFRM. Manually increasing load is applied as measured by scale until some failure occurs.

    Specimen size:

    The specimen should be conditioned at (20±10) °C.

    Calculation:

    Cohesive/adhesive force can be calculated by using the following formula:

    CA= F/A

    CA = cohesive/adhesive force

    F = reduced force

    A = Cap area

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