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
AbstractThe 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.
|Journal series||Construction and Building Materials, ISSN 0950-0618, e-ISSN 1879-0526|
|Publication size in sheets||6006.75|
|Keywords in English||Superabsorbent polymers Freeze-thaw resistance Concrete internal curing Friction Desorption|
|ASJC Classification||; ;|
|Score||= 140.0, 24-09-2020, ArticleFromJournal|
|Publication indicators||= 0; : 2018 = 2.369; : 2018 = 4.046 (2) - 2018=4.685 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.