A combination of liquid–crystal display glass powder and slag in alkali-activated material

Ilhwan You, Doo Yeol Yoo, Seung Jung Lee, Yujin Lee, Goangseup Zi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

This study presents the feasibility of a combination of liquid–crystal display glass powder (LCDGP) and slag in alkali-activated materials using several techniques including nuclear magnetic resonance and thermodynamic modeling. Slag was replaced with LCDGP at a weight ratio of 25%, 50%, 75%, and 100%. Replacing slag with LCDGP up to 50% resulted in no strength loss and no significant changes in phase assemblages compared to alkali-activated slag. The incorporation of 25% LCDGP improved the pore structure and the reactivity of both precursors which result in increased compressive strength. This was because aluminum of LCDGP incorporated into the silicate which polymerized more C-(N)-A-S-H gel. However, the excessive use of LCDGP (more than 50%) caused a significant strength loss. Since LCDGP was responsible for lowering the pore solution's pH, its excessive use reduced the reactivity of precursors and caused a significant strength loss. This study suggests a guideline for using LCDGP to improve the mechanical property of alkali-activated slag.

Original languageEnglish
Article number130527
JournalConstruction and Building Materials
Volume369
DOIs
Publication statusPublished - 2023 Mar 10

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF- 2020R1I1A1A01071824 ), the Ministry of Science and ICT (NRF-2021R1A5A1032433), and the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministy of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20213030020110).

Publisher Copyright:
© 2023

Keywords

  • Alkali-activated materials
  • Blast furnace slag
  • Degree of reaction
  • Liquid-crystal display glass powder
  • Waste glass

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science

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