Properties of cement screeds using recycled fine aggregates with respect to cement percentage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00379872" target="_blank" >RIV/68407700:21110/24:00379872 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.14311/APP.2024.49.0026" target="_blank" >https://doi.org/10.14311/APP.2024.49.0026</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/APP.2024.49.0026" target="_blank" >10.14311/APP.2024.49.0026</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Properties of cement screeds using recycled fine aggregates with respect to cement percentage

Popis výsledku v původním jazyce

This article deals with the effect of 100% replacement of natural aggregate by recycled aggregate and at the same time the effect of cement percentage on the observed properties of cement screeds. For these purposes, concrete and brick recycled aggregate is used in combination with CEM I 42.5R Portland cement, constituting 10 %, 15 %, 20 % and 25 % of the mixtures weight. To determine the properties of the cement screeds, test intervals of 3, 7, 14, 21 and 28 days are set, during which changes in bulk density are monitored. Simultaneously, destructive tests are carried out on test beams of 4 x 4 x 16 cm in size. The results found that the use of recycled fine aggregates allows the production of lighter cement screeds, for example, for reconstruction. Potentially usable mixes appear to be those containing 15 %, 20 % and 25 % cement compared to recycled aggregate. For the contaminated recyclate fine fraction, the flexural strength has been shown to improve. However, this improvement is not reflected in an increase in compressive strength.

Název v anglickém jazyce

Properties of cement screeds using recycled fine aggregates with respect to cement percentage

Popis výsledku anglicky

This article deals with the effect of 100% replacement of natural aggregate by recycled aggregate and at the same time the effect of cement percentage on the observed properties of cement screeds. For these purposes, concrete and brick recycled aggregate is used in combination with CEM I 42.5R Portland cement, constituting 10 %, 15 %, 20 % and 25 % of the mixtures weight. To determine the properties of the cement screeds, test intervals of 3, 7, 14, 21 and 28 days are set, during which changes in bulk density are monitored. Simultaneously, destructive tests are carried out on test beams of 4 x 4 x 16 cm in size. The results found that the use of recycled fine aggregates allows the production of lighter cement screeds, for example, for reconstruction. Potentially usable mixes appear to be those containing 15 %, 20 % and 25 % cement compared to recycled aggregate. For the contaminated recyclate fine fraction, the flexural strength has been shown to improve. However, this improvement is not reflected in an increase in compressive strength.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/SS03010302" target="_blank" >SS03010302: Vývoj efektivních nástrojů pro minimalizaci vzniku stavebního a demoličního odpadu, jeho monitoring a opětovné využití</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

NMM 2023 Nano & Macro Mechanics

ISBN

978-80-01-07378-0

ISSN

—

e-ISSN

—

Počet stran výsledku

5

Strana od-do

26-30

Název nakladatele

ACTA Polytechnica CTU

Místo vydání

Prague

Místo konání akce

Praha

Datum konání akce

12. 9. 2024

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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