Micro-mechanical properties of alkali-activated fly ash evaluated by nanoindentation

Journal article (2017)

Authors

Y. Ma Guangzhou University
G. (Guang) Ye Materials and Environment - CEG , Universiteit Gent
J Hu South China University of Technology
Research Group
Materials and Environment (CEG) (TU Delft)
More Info
expand_more

Published Date

30-08-2017

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

In this study, the micro-mechanical property of different phases in alkali-activated fly ash (AAFA) pastes was investigated by nanoindentation. The mechanical information of the gel phase in AAFA was then linked to the chemical and microstructural information provided by SEM-EDX, ATR-FTIR and N2 adsorption, respectively. Three phases, i.e. aluminosilicate gel, residual fly ash particles and pores, were identified from the microstructural analysis of AAFA, corresponding to three distinct peaks in the indentation modulus frequency plots. The peak corresponding to the gel phase varied with curing age and activator content. The elastic modulus of aluminosilicate gel measured by nanoindentation was affected by the pores between nano to micro scale. The results of the chemical bonds of AAFA, however, cannot correspond well with the micromechanical results.

Files

1_s2.0_S0950061817308346_main.... (pdf)
(pdf | 3.69 Mb)
Unknown license

Download not available