Shrinkage of the cement pastes with different amount of finely ground recycled concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00240979" target="_blank" >RIV/68407700:21110/15:00240979 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.ijarse.com/images/fullpdf/1450106099_19_Research_Paper.pdf" target="_blank" >http://www.ijarse.com/images/fullpdf/1450106099_19_Research_Paper.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Shrinkage of the cement pastes with different amount of finely ground recycled concrete

Popis výsledku v původním jazyce

Complete recycling of the old concrete is very problematic mainly because of fine fraction (< 1 mm). Some studies focus on using recycled concrete powder as thermal activated binder or alternative raw material for manufacture of the Portland clinker. But those approaches are not sustainable and environmental-friendly. Use recycled concrete powder as cement replacement or filler seems to be a better way. This study deals with influence of finely ground recycled concrete (FGRC) on shrinkage of cement pastes. Finely ground recycled concrete was produced by LAVARIS Ltd. by using high speed mill. The old concrete was obtained from old railway sleepers. Four sets of cement paste with different amount (0, 33, 67, 100 wt. %) of FGRC were prepared. Increasing amount of FGRC negatively influenced shrinkage of the cement paste. It is mainly caused by increasing w/c ratio due to higher water demands of FGRC. Improvement could be achieved by using high amount of superplastizers.

Název v anglickém jazyce

Shrinkage of the cement pastes with different amount of finely ground recycled concrete

Popis výsledku anglicky

Complete recycling of the old concrete is very problematic mainly because of fine fraction (< 1 mm). Some studies focus on using recycled concrete powder as thermal activated binder or alternative raw material for manufacture of the Portland clinker. But those approaches are not sustainable and environmental-friendly. Use recycled concrete powder as cement replacement or filler seems to be a better way. This study deals with influence of finely ground recycled concrete (FGRC) on shrinkage of cement pastes. Finely ground recycled concrete was produced by LAVARIS Ltd. by using high speed mill. The old concrete was obtained from old railway sleepers. Four sets of cement paste with different amount (0, 33, 67, 100 wt. %) of FGRC were prepared. Increasing amount of FGRC negatively influenced shrinkage of the cement paste. It is mainly caused by increasing w/c ratio due to higher water demands of FGRC. Improvement could be achieved by using high amount of superplastizers.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/TA04031256" target="_blank" >TA04031256: Rozvoj mechanicky aktivovaných materiálů na bázi recyklovaného betonu pro progresivní stabilizované a za studena recyklované konstrukční vrstvy</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

International Journal of Advance Research in Science and Engineering

ISSN

2319-8354

e-ISSN

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Svazek periodika

04

Číslo periodika v rámci svazku

02

Stát vydavatele periodika

IN - Indická republika

Počet stran výsledku

5

Strana od-do

157-161

Kód UT WoS článku

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EID výsledku v databázi Scopus

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