Effects of Styrene-Acrylate Emulsion on the Damping Ability and Hydration of Cement Matrix

Abstract:

Cement mortar of high damping ability has been maded by using styrene-acrylate emulsion as an admixture. The addition of styrene-acrylate emulsion causes the loss tangent of plain cement mortar to increase at all temperature (-30-30 °C) and frequencies (0.1-2.0 Hz), and the loss tangent increase is particularly large at 15-30 °C, even up to 0.25 at 30 °C and 0.5Hz due to the glass temperature of styrene-acrylate emulsion, although the storage modulus of cement mortar with this admixture decreases at all temperatures and frequencies, however, for the loss modulus, which serves as an comprehensive figure-of-merit for the vibration reduction ability, styrene-acrylate emulsion may dramatically increase it. The X-ray diffraction (XRD) and infrared (IR) spectrum analysis have provided evidence that styrene-acrylate decelerates the hydration of cement paste.

• Periodical: Key Engineering Materials (Volumes 302-303)
• Pages: 550-555
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.302-303.550
• Online since: January 2006
• Authors: Tie-Jun Liu, Jin Ping Ou
• Keywords: Cement Mortar, Hydrate Reaction, Loss Tangent, Storage Modulus, Styrene-Acrylate Emulsion

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