Publication
Title
Verification of the presence of superabsorbent polymers (SAP) in fresh concrete : results of an interlaboratory study of RILEM TC 260-RSC
Author
Abstract
New methods are proposed for the verification of the presence of superabsorbent polymers (SAP) in freshly mixed concrete and estimation of SAP quantity. The methods are in general based on flushing concrete with excess water. They allow separating the light, water-sorbed hydrogel particles from the mineral components in the fresh concrete and making these particles available for further tests. Two types of tests are proposed: Test 1 serves for a visual verification of the presence of SAP (qualitative test), while Test 2 enables quantifying the mass of the collected SAP as a proxy of their concentration in concrete (quantitative test). Different procedures are proposed for these two test methods and their performance is evaluated. The testing procedures were scrutinized in an interlaboratory study carried out by 14 participants from 12 countries. All participating groups detected the presence of SAP in the mix using the qualitative procedures (Test 1). Based on this outcome, we suggest that this method should be applied in the field. In contrast, while most participants obtained reasonably reliable results with the quantification procedure of Test 2, some participants reported large errors. Therefore, the quantification method needs to be further refined, starting from the experience gained in this interlaboratory study.
Language
English
Source (journal)
Materials and Structures / Réunion internationale des laboratoires d'essais et de recherches sur les matériaux et les constructions; International Association of Testing and Research Laboratories for Materials and Structures. - London, 1987, currens
Publication
London : E. & F. N. Spon , 2024
ISSN
1359-5997 [print]
1871-6873 [online]
DOI
10.1617/S11527-024-02334-W
Volume/pages
57 :4 (2024) , p. 1-12
Article Reference
69
ISI
001206116800001
Full text (Publisher's DOI)
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UAntwerpen
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Publications with a UAntwerp address
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Creation 24.04.2024
Last edited 07.05.2024
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