Effect of mechanically-induced fragmentation of polyacrylic superabsorbent polymer (SAP) hydrogel on the properties of cement composites

Maciej Kalinowski , Piotr Paweł Woyciechowski , Joanna Julia Sokołowska

Abstract

The effectiveness of internal curing of cement composites with the use of SAP depends, among others, on its chemical composition and its granulation. However, the interaction between hydrogel and other components of the concrete hasn’t been fully investigated. The aim of the presented research was to investigate the impact of cement/aggregate particles friction during mixing on the properties of water-saturated SAP. Novel mechanism of SAP hydrogel fragmentation was identified as one of the causes of differences in internal curing efficiency dependent on SAP state (water-saturated/non-saturated). Due to mixing process the surface area of tested SAP increased approx. 10 times. It was found that dosing SAP in a hydrogel form results in more homogenous SAP distribution within cement matrix. Such a modification of SAP dosing process enables to increase the efficiency of concrete internal curing. It was confirmed by obtained results for concrete mechanical strength and freeze-thaw resistance.
Author Maciej Kalinowski (FCE / ICE)
Maciej Kalinowski,,
- The Institute of Civil Engineering
, Piotr Paweł Woyciechowski (FCE / ICE)
Piotr Paweł Woyciechowski,,
- The Institute of Civil Engineering
, Joanna Julia Sokołowska (FCE / ICE)
Joanna Julia Sokołowska,,
- The Institute of Civil Engineering
Journal seriesConstruction and Building Materials, ISSN 0950-0618, e-ISSN 1879-0526
Issue year2020
Vol263
Pages1-10
Publication size in sheets6006.75
Article number120135
Keywords in EnglishSuperabsorbent polymers Freeze-thaw resistance Concrete internal curing Friction Desorption
ASJC Classification2205 Civil and Structural Engineering; 2215 Building and Construction; 2500 General Materials Science
DOIDOI:10.1016/j.conbuildmat.2020.120135
URL https://doi.org/10.1016/j.conbuildmat.2020.120135
Languageen angielski
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 24-09-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 2.369; WoS Impact Factor: 2018 = 4.046 (2) - 2018=4.685 (5)
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