Title
Potential of secondary resources as aluminium-silicate precursors for geopolymer synthesis
Author
Valcke, S.L.A.
Pipilikaki, P.
Fischer, H.R.
Contributor
Leonelli, C. (editor)
Romagnoli, M. (editor)
Publication year
2015
Abstract
Secondary resources containing (catcium) atuminium-silicate phases, e.g., fly ash, slag or bottom ash are used as precursor for binders such as geopolymers. Because secondary resources can be highly variable in terms of their potential to dissolve and form reaction products, analytical methods are needed to evaluate their potential as a precursor and to optimize the geopolymer mix design. The most commonly used methods (e.g., XRF, XRD) for measuring the characteristics of source materials which influence binder performance, do not capture heterogeneity of the particles and do not necessarily reveal the key parameter that is most dominant for the binder performance. This presentation therefore discusses the applicability of several techniques we have investigated to capture inter- and intra-particle variations of aluminium-silicates and to evaluate the potential influence of these variations on geopolymer performance. The evaluated techniques are: automated phase mapping based on EDS spectral imaging and processing using principal component analysis; feature sizing and chemical typing (fS&CT); semi-quantitative fTIR 29 and solid state Si NMR.
Subject
Fluid & Solid Mechanics
SR - Structural Reliability
TS - Technical Sciences
Buildings and Infrastructures
Materials
2015 Urbanisation
Geopolymer precursor
Characterization
Automated phase mapping
Feature sizing and chemical typing
FTIR
Solid state
29Si NMR
To reference this document use:
http://resolver.tudelft.nl/uuid:3f0e129c-3471-4cec-9e82-ba771ca66cd8
TNO identifier
528450
ISBN
9781326377328
Source
Engineering Conference International, New York Geopolymers: The route to eliminate waste and emissions in ceramic and cement manufacturing, 44-48
Document type
conference paper