Aqueous phase composition of alkali-activated blast furnace slag paste

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

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


This study extracted pore solution from the hardened blast furnace slag pastes activated with sodium silicate and/or sodium hydroxide through the steel-die method and analyzed the aqueous phase composition via ICP-OES technique. The results show that the concentrations of Si, Al, Na and OH" decrease with progress of slag reaction and increase with increase of Na20, while the concentration of Ca shows no substantial change. The concentrations of Na, Al and Ca are positively correlated to the concentration of OH" in a quasi-linear relationship, while the concentration of Si has a great dependence on the initial concentration of 0H'. Two regions were identified in the plots between the concentrations of Si and Ca, by which two kinds of C-S-H gels are expected. The Al/Si is linearly correlated to Na/Si for both sodium hydroxide and sodium silicate activated systems.
Original languageEnglish
Title of host publicationProceedings of the 2nd international conference on the chemistry of construction materials
Subtitle of host publicationMunchen, Germany
EditorsJohann Plank, Lei Lei, Timon Echt
Place of PublicationFrankfurt
PublisherGesellschaft Deutcher Chemiker
ISBN (Electronic)978-3-936028-96-6
Publication statusPublished - 2016
Event2nd International Conference on the Chemistry of Construction Materials: Munchen, Germany - Technical University in Munich, Munchen, Germany
Duration: 10 Oct 201612 Oct 2016
Conference number: 2

Publication series



Conference2nd International Conference on the Chemistry of Construction Materials
Abbreviated titleICCCM 2016
Internet address


  • alkaline activation
  • slag
  • Pore solution
  • aqueous phase

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