Compressive strength of epoxy with “free-inforcement” flyash without any prior
separation is studied. It is observed that the increase in filler volume fraction
beyond 10% brings about a reduction in the compressive strength. Increasing adhesion
factor, determined relative to unfilled matrix, implied an alleviation in the
interfacial adhesion due to dewetting, especially at the surfaces of larger particles
and at higher filler concentrations. Such deductions were verified by examining the
surface features of compression tested samples in Scanning Electron Microscope.
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