Thermodynamic modeling and experimental study of alkali-activated slag paste

Yibing Zuo, Marija Nedeljkovic, Kamel Arbi Ghanmi, Guang Ye

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

48 Downloads (Pure)

Abstract

A newly developed thermodynamic approach was introduced from the literature to investigate the influence of NaOH content on the hydrate assemblage and chemistry of aqueous solution of activated slag paste (Na2O/slag=4%, 6% and 8%). The ICP-OES test was performed to obtain the aqueous species profiles such as Si, Ca, Al and Na etc. The elemental concentrations in aqueous solution show a similar trend between thermodynamic calculations and experimental results. The modeling results showed that the influence of NaOH content on the uptake of Na into the primary reaction products and chemical shrinkage depends on slag reaction extent and NaOH content. The NaOH content does not show an obvious influence on the porosity development. The volume fraction of primary products in total products is between 40% and 60%, and particularly increases slightly after a certain degree of reaction for activated slag with Na2O/slag=4% and 6%. The volume ratio between total products and reacted slag is around 1.5~1.7, smaller than the value from 2.06 to 2.2 reported for Portland cement.
Original languageEnglish
Title of host publicationUltra-high performance concrete and high performance construction materials
Subtitle of host publicationProceedings of HiPerMat 2016, Kassel, Germany
EditorsEkkehard Fehling, Bernhard Middendorf, Jenny Thiemicke
Place of PublicationKassel
PublisherKassel University Press
Pages1-8
Number of pages8
Volume27
Edition27
ISBN (Electronic)978-3-7376-0095-8
ISBN (Print)978-3-7376-0094-1
Publication statusPublished - 2016
Event4th international symposium on ultra-high performance concrete and high performance construction materials - Kassel, Germany
Duration: 9 Mar 201611 Mar 2016
Conference number: 4
http://hipermat.uni-kassel.de/index.php

Conference

Conference4th international symposium on ultra-high performance concrete and high performance construction materials
Abbreviated titleHiPerMat 2016
CountryGermany
CityKassel
Period9/03/1611/03/16
Internet address

Keywords

  • thermodynamic modeling
  • NaOH
  • slag
  • pore solution
  • chemical shrinkage

Fingerprint Dive into the research topics of 'Thermodynamic modeling and experimental study of alkali-activated slag paste'. Together they form a unique fingerprint.

Cite this