Deakin University
Browse

File(s) under permanent embargo

Damping capacity of fly ash-based geopolymer

Version 2 2024-06-04, 05:39
Version 1 2015-09-30, 16:21
conference contribution
posted on 2024-06-04, 05:39 authored by P Zhu, G Kai, F Kenan, JG Sanjayan, D Wenhui, Frank CollinsFrank Collins
As 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

Volume

48

Pagination

3128-3137

Location

Jeju Island, South Korea

Start date

2011-08-21

End date

2011-08-26

Language

eng

Publication classification

E Conference publication, E1.1 Full written paper - refereed

Copyright notice

2012, Springer Science + Business

Title of proceedings

ICCM 2011 : Proceedings of the 18th International Conference on Composite Materials

Event

Composite Materials. International Conference : (18th : 2011 : Jeju, Korea)

Issue

Journal of materials science [8]

Publisher

Springer

Place of publication

New York, N.Y.

Series

Composite Materials