Effect of incorporated superabsorbent polymers on workability and hydration process in cement-based materials

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00334527" target="_blank" >RIV/68407700:21110/19:00334527 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.5593/sgem2019/6.2/S26.013" target="_blank" >http://dx.doi.org/10.5593/sgem2019/6.2/S26.013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2019/6.2/S26.013" target="_blank" >10.5593/sgem2019/6.2/S26.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of incorporated superabsorbent polymers on workability and hydration process in cement-based materials

Popis výsledku v původním jazyce

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. SGEM2019.

Název v anglickém jazyce

Effect of incorporated superabsorbent polymers on workability and hydration process in cement-based materials

Popis výsledku anglicky

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. SGEM2019.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA19-14789S" target="_blank" >GA19-14789S: Vysokohodnotný beton se zvýšenou samoléčivou schopností</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

19th International Multidisciplinary Scientific Geoconference SGEM 2019

ISBN

978-619-7408-89-8

ISSN

1314-2704

e-ISSN

—

Počet stran výsledku

8

Strana od-do

99-106

Název nakladatele

STEF92 Technology Ltd.

Místo vydání

Sofia

Místo konání akce

Albena

Datum konání akce

30. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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