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EFFECT OF INCORPORATED SUPERABSORBENT POLYMERS ON WORKABILITY AND HYDRATION PROCESS IN CEMENT-BASED MATERIALS

Koci, J.; Fort, J.; Mildner, M.; Cerny, R.
Abstract:
The crack propagation and autogenous shrinkage pose a significant weakness for concrete structures. On this account, the utilization of smart materials can be viewed as a promising step to overbridge the common issues. Namely, the application of superabsorbent polymers (SAPs) can improve the autogenous shrinkage and crack sealing thanks to its great swelling capability. However, SAP particles used as water retaining admixtures have a substantial influence on the rheological properties due to fast water removal from the mixture, thus finally decreasing the workability of fresh mixture. The lowered workability of the fresh mixture may result in the densification of the material matrix due to internal curing and decrease the strength due to the macro-pores formation. In this study, the effect of incorporated SAP on the rheology of cement mortars was studied, and methodology for a determination of optimal water dosage was employed. The effect of incorporation of SAP dosages about 0.25, 0.5, 0.75 and 1 wt.% on the fresh mixture workability, initial and final setting time, and mechanical strength parameters were determined. The method compares the flow values to determine the amount of additional water and plasticizer in order to counteract the loss in workability and the change in microstructure.
SGEM Research areas:
Year:
2019
Type of Publication:
In Proceedings
Keywords:
Superabsorbent polymer; workability; cement; flow table test; setting time; water dosage.
Volume:
19
SGEM Book title:
19th International Multidisciplinary Scientific GeoConference SGEM 2019
Book number:
6.2
SGEM Series:
International Multidisciplinary Scientific GeoConference-SGEM
Pages:
99-106
Publisher address:
51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
Period:
30 June - 6 July, 2019
ISBN:
978-619-7408-89-8
ISSN:
1314-2704
Conference:
19th International Multidisciplinary Scientific GeoConference SGEM 2019, 30 June - 6 July, 2019
DOI:
10.5593/sgem2019/6.2/S26.013
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