Assessing the chemical involvement of limestone powder in sodium carbonate activated slag

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)
161 Downloads (Pure)

Abstract

This study aims to investigate the effect of limestone powder (LP) on the reaction of sodium carbonate activated slag. The results show that the incorporated LP up to 30% improves the strength development, especially at advanced curing ages. A slightly accelerated reaction is observed for samples containing low amount of LP (≤5%), while mixture with 10% LP shows the optimized results with respect to the heat release and strength development. Chemical effect of incorporating LP is observed at high replacement levels (≥15%), indicated by the formation of a new phase, natron (Na2CO3·10H2O). Besides, relatively high contents of hydrotalcite-like phases are generated when increasing the dosage of limestone powder. The chemical changes, including the volume changes of generating natron and the transformation of natron to calcite, is potentially responsible for the enhanced mechanical properties.
Original languageEnglish
Article number136
Pages (from-to)1-14
Number of pages14
JournalMaterials and Structures
Volume50
Issue number2
DOIs
Publication statusPublished - 1 Apr 2017

Keywords

  • Chemical effect
  • Limestone powder
  • Mechanical properties
  • Reaction kinetics
  • Reaction products
  • Sodium carbonate activated slag

Fingerprint Dive into the research topics of 'Assessing the chemical involvement of limestone powder in sodium carbonate activated slag'. Together they form a unique fingerprint.

Cite this