TY - JOUR
T1 - The influence of superabsorbent polymer on the properties of alkali-activated slag pastes
AU - Vafaei, Babak
AU - Farzanian, Khashayar
AU - Ghahremaninezhad, Ali
N1 - Funding Information:
This research was partially funded by the Provost Research Award at the University of Miami and it is hereby acknowledged.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/3/10
Y1 - 2020/3/10
N2 - 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.
AB - 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.
KW - Absorption
KW - Alkali-activated slag
KW - SAP
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U2 - 10.1016/j.conbuildmat.2019.117525
DO - 10.1016/j.conbuildmat.2019.117525
M3 - Article
AN - SCOPUS:85075262631
VL - 236
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 117525
ER -