Low-strength self-compacting concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F17%3APU121949" target="_blank" >RIV/00216305:26110/17:PU121949 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.259.97" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/SSP.259.97</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.259.97" target="_blank" >10.4028/www.scientific.net/SSP.259.97</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Low-strength self-compacting concrete

Popis výsledku v původním jazyce

Self-compacting concretes (SCC) are relatively modern building material that has great potential for using in a wide range of applications. Its origin and development is considered a major breakthrough in concrete technology, especially because of its ease of placement without the need to use external dynamic forces in the form of vibrations. This can significantly affect the resulting properties of concrete as well as working conditions on the building site. To maintain the fresh concrete’s rheological properties and, at the same time, achieve lower final strength, reduced amount of Portland cement needs to be proposed in mixture design. Then, to keep the number of fine particles at high level, it is necessary to use fine grained cement compatible additives which do not chemically participate on hydration process – at least not too much – and thus do not increase the resulting strength. This paper will address the verification of inert additives functionality for the production of lower-strength self-compacting concretes, namely in strength classes C16/20 and C25/30 according to ČSN EN 206. The inert admixture used in this experiment – stone dust from Zelesice quarry – has a relatively high water absorption. Therefore, the particularly crucial part was the fine-tuning of fresh SCC’s rheological properties. The results are clearly pointing to the possibility of lower-strength self-compacting concretes’ production and thus makes it possible to expand the usability portfolio of this type of modern construction material with regard to its lower production costs.

Název v anglickém jazyce

Low-strength self-compacting concrete

Popis výsledku anglicky

Self-compacting concretes (SCC) are relatively modern building material that has great potential for using in a wide range of applications. Its origin and development is considered a major breakthrough in concrete technology, especially because of its ease of placement without the need to use external dynamic forces in the form of vibrations. This can significantly affect the resulting properties of concrete as well as working conditions on the building site. To maintain the fresh concrete’s rheological properties and, at the same time, achieve lower final strength, reduced amount of Portland cement needs to be proposed in mixture design. Then, to keep the number of fine particles at high level, it is necessary to use fine grained cement compatible additives which do not chemically participate on hydration process – at least not too much – and thus do not increase the resulting strength. This paper will address the verification of inert additives functionality for the production of lower-strength self-compacting concretes, namely in strength classes C16/20 and C25/30 according to ČSN EN 206. The inert admixture used in this experiment – stone dust from Zelesice quarry – has a relatively high water absorption. Therefore, the particularly crucial part was the fine-tuning of fresh SCC’s rheological properties. The results are clearly pointing to the possibility of lower-strength self-compacting concretes’ production and thus makes it possible to expand the usability portfolio of this type of modern construction material with regard to its lower production costs.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

23rd Concrete Days 2016

ISBN

978-3-0357-1105-9

ISSN

1662-9779

e-ISSN

—

Počet stran výsledku

4

Strana od-do

97-100

Název nakladatele

Trans Tech Publication

Místo vydání

Neuveden

Místo konání akce

Litomyšl

Datum konání akce

30. 11. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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