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Damping capacity of fly ash-based geopolymer
conference contribution
posted on 2013-01-01, 00:00 authored by P Zhu, G Kai, F Kenan, J G Sanjayan, D Wenhui, Frank CollinsFrank CollinsAs environmentally-friendly materials, geopolymers have the potential to replace ordinary Portland cement (OPC) for the construction of railway sleepers and multi-flue chimneys, where the vibration control capabilities of the material must be considered. The critical damping value (ξ) is the main parameter in relation to vibration reduction. In this study, the traditional logarithmic decrement technique was used to measure the ξ of geopolymers. Geopolymers were prepared by activating fly ash using alkali solutions with different SiO2/Na2O ratios. The results show that the ξ of the geopolymers is similar to that of the OPC counterpart. Finite element analysis (FEM) based on the Rayleigh damping model was conducted to replicate the test results, and scanning electron microscopy and mercury-intrusion porosimetry were used to study the microstructure of the geopolymers. A discussion of the possible damping mechanisms based on the microstructural investigation and the FEM analysis is presented.
History
Event
Composite Materials. International Conference : (18th : 2011 : Jeju, Korea)Volume
48Issue
Journal of materials science [8]Series
Composite MaterialsPagination
3128 - 3137Publisher
SpringerLocation
Jeju Island, South KoreaPlace of publication
New York, N.Y.Start date
2011-08-21End date
2011-08-26Language
engPublication classification
E Conference publication; E1.1 Full written paper - refereedCopyright notice
2012, Springer Science + BusinessTitle of proceedings
ICCM 2011 : Proceedings of the 18th International Conference on Composite MaterialsUsage metrics
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