A comprehensive intelligent framework for interpreting and quantifying the microstructure of waste-derived alkali-activated materials: A case study of fly ash/slag pastes

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Lihui Li - , Shanghai Jiao Tong University (Autor:in)
  • Jian Yang - , Shanghai Jiao Tong University, University of Birmingham (Autor:in)
  • Huanyu Li - , Professur für Baustoffe, Shanghai Jiao Tong University (Autor:in)

Abstract

The alkali-activated fly ash/slag (AAFS) pastes exhibit complex compositions and heterogeneous spatial distributions of phases, necessitating a comprehensive tool capable of quantifying phase assemblage, characterizing ion diffusion, and unveiling microstructure evolution. However, existing techniques have limitations in providing interpretability and visual analyses. This study introduces a versatile analysis methodology for energy dispersive X-ray spectroscopy (EDS) images, encompassing data preprocessing, data interpretation, and four downstream applications: phase inference, phase quantification, ion diffusion characterization, and quantification of phase spatial distributions. Through the analysis of five representative elements, this study successfully identifies and quantifies three components in precursors (slag, quartz, mullite) and four reaction products (slag-products, quartz-products, mullite-products, mixture products) in the AAFS pastes. Moreover, by characterizing ion diffusion and quantifying spatial distributions, insights into the interactions among various precursors and reaction products are elucidated. The proposed EDS image analysis methodology is expected to yield valuable understandings of the reaction mechanisms and phase evolution involved in utilizing solid waste as cementitious materials.

Details

OriginalspracheEnglisch
Aufsatznummer139429
FachzeitschriftJournal of cleaner production
Jahrgang429
PublikationsstatusVeröffentlicht - 1 Dez. 2023
Peer-Review-StatusJa

Schlagworte

Ziele für nachhaltige Entwicklung

Schlagwörter

  • Alkaline activated fly ash/slag, Energy dispersive X-ray spectrometer (EDS), Image analysis, Microstructure, Phase assemblage