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When you use epoxy grouts, you must consider the HDT of the epoxy, operational temperature, and duration of the load.
Heat Deflection Temperature
A value closely related to the glass transition temperature and used by con- struction designers is the heat deflection temperature (HDT), as measured by ASTM D - 648.
The HDT is the temperature at which an epoxy beam deflects 0.01 in. under a constant load of 264 psi.
, the temperature of the bath is the polymer's heat deflection temperature in degrees Fahrenheit.
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