An investigation of the compatibility of different approaches to self-healing concrete: The superabsorbent polymers and microbially inducedcalcite precipitation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00332858" target="_blank" >RIV/68407700:21110/19:00332858 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

An investigation of the compatibility of different approaches to self-healing concrete: The superabsorbent polymers and microbially inducedcalcite precipitation

Popis výsledku v původním jazyce

The concept of the self-healing concrete, thus an improvement of the durability of concrete structures, has become a widely investigated topic in recent decades.The aim of this study is to examine apossible combination of two existing approaches to the spontaneous crack-sealing –the biologically driven calcite precipitation and the addition of superabsorbent polymers (SAP) into the concrete matrix.Firstly, the paper compares the absorption rate of SAP in various solutions, including a nutrient-based solution which is used in the bio-concrete. The results showthat the ionic composition of the liquid influence theswelling capacity greatly. In this study, the absorption rate of SAP in thenutrient-based solution is as low as 6% of the rate in distilled water. Thus, this finding could indicate a possible drawback of the combination of the proposed self-healing approaches. Further, this paper determines the impact of the SAP addition to cement paste with different water/cement ratios. In this experiment, the SAP is applied in various dosages(1% and 0.5% by c. w.)and states (a dry state or a fully swollen state).The conducted flowability and mechanical properties tests indicatea profound, generally negative, impact of the SAP addition on the cement paste characteristics. The paper then discusses possible adjustments of the SAP-cement pastecompositionand comparesthe present results with previous studies.

Název v anglickém jazyce

An investigation of the compatibility of different approaches to self-healing concrete: The superabsorbent polymers and microbially inducedcalcite precipitation

Popis výsledku anglicky

The concept of the self-healing concrete, thus an improvement of the durability of concrete structures, has become a widely investigated topic in recent decades.The aim of this study is to examine apossible combination of two existing approaches to the spontaneous crack-sealing –the biologically driven calcite precipitation and the addition of superabsorbent polymers (SAP) into the concrete matrix.Firstly, the paper compares the absorption rate of SAP in various solutions, including a nutrient-based solution which is used in the bio-concrete. The results showthat the ionic composition of the liquid influence theswelling capacity greatly. In this study, the absorption rate of SAP in thenutrient-based solution is as low as 6% of the rate in distilled water. Thus, this finding could indicate a possible drawback of the combination of the proposed self-healing approaches. Further, this paper determines the impact of the SAP addition to cement paste with different water/cement ratios. In this experiment, the SAP is applied in various dosages(1% and 0.5% by c. w.)and states (a dry state or a fully swollen state).The conducted flowability and mechanical properties tests indicatea profound, generally negative, impact of the SAP addition on the cement paste characteristics. The paper then discusses possible adjustments of the SAP-cement pastecompositionand comparesthe present results with previous studies.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GA18-15697S" target="_blank" >GA18-15697S: Samohojení cementových kompozitů v důsledku bakteriální kalcifikace</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

Fibre Concrete 2019

ISBN

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ISSN

1757-899X

e-ISSN

1757-899X

Počet stran výsledku

8

Strana od-do

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Název nakladatele

IOP Publishing Ltd

Místo vydání

Bristol

Místo konání akce

Praha

Datum konání akce

17. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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