DYNAMIC-MECHANICAL PROPERTIES OF A BITUMEN-SILICA COMPOSITE .1. RELATION WITH FILLER CONTENT AND BITUMEN-SILICA INTERFACIAL AREA

Dynamic-mechanical properties of bitumen-silica composite materials, measured at room temperature, do not vary with the volume ratio (φ) in a simple manner as do usual bituminous concretes. However, E′ is a linear function of the interfacial area (φψ) between the filler and the binder per unit volume. Thus E′ = E0′ +a(φψ), where a is a constant related to the storage modulus, in the absence of voids and with a void ratio factor. The loss moduli, plotted against (φψ) go through a maximum in a similar way as when plotted versus decreasing temperatures. © 1979 Dr. Dietrich Steinkopff Verlag.