The influence of superabsorbent polymer on the properties of alkali-activated slag pastes

Babak Vafaei, Khashayar Farzanian, Ali Ghahremaninezhad

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This paper discusses the interaction between superabsorbent polymer (SAP) and alkali-activated slag pastes and the influence of SAP on the properties of the pastes. SAP showed higher absorption in pore solutions extracted from alkali-activated slag pastes compared to that extracted from portland cement paste. Hydrogel desorption in alkali-activated slag matrix activated with Na2CO3 was noticeably delayed compared to alkali-activated slag matrix activated with NaOH matrix or portland cement matrix; this is attributed to a significant delay in the solid skeleton development in this matrix. Addition of SAP was shown to be effective in reducing autogenous shrinkage in alkali-activated slag pastes. A general reduction in compressive strength and electrical resistivity was observed in alkali-activated slag pastes when SAP was added; macrovoid formation and increased overall water/binder are possible reasons for this reduction, respectively.

Original languageEnglish (US)
Article number117525
JournalConstruction and Building Materials
Volume236
DOIs
StatePublished - Mar 10 2020

Keywords

  • Absorption
  • Alkali-activated slag
  • SAP

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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