Abstract
The paper presents water uptake and tensile properties of epoxy filled with inorganic fillers having different reactivity to water, namely Portland cement, fly ash, and calcium carbonate (CaCO3) particles. Portland cement and CaCO3, respectively have the highest and the lowest water reactivity. The filler volume fraction was ranging from 0 to 25 %. The results showed that for the reactive filler, with the increase of volume fraction, the water uptake increased and behaved as non-Fickian, whereas for the less reactive filler, the water uptake decreased and behaved as pseudo-Fickian. In dry condition, with the increase of volume fraction, the elastic modulus and tensile strength increased and tended to decrease, respectively, regardless of the filler type. However, in wet condition, the positive effect of filler on the elastic modulus diminished due to excessive plasticization of the matrix, and the reduction of elastic modulus of the most reactive filler is the lowest.
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