Crack-Resistance of 25 Cements Determined by the Ring Shrinkage Test

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00366713" target="_blank" >RIV/68407700:21110/23:00366713 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/978-3-031-33211-1_95" target="_blank" >https://doi.org/10.1007/978-3-031-33211-1_95</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-031-33211-1_95" target="_blank" >10.1007/978-3-031-33211-1_95</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Crack-Resistance of 25 Cements Determined by the Ring Shrinkage Test

Popis výsledku v původním jazyce

Cement-based materials are known for shrinkage strain on drying, causing easily crack initiation under internal or external restraint. Higher crack resistance can be achieved by slowing down the strength gain with slower chemical shrinkage evolution. The ring shrinkage test provides an accelerated method how to quantify cracking resistance on drying, supported with long-term experiments for concrete surface cracking. The experiments presented in this paper use ring shrinkage tests for 25 mortars, which cover 10 commercial cements and 15 on- demand cements, spanning Portland cements and blended cements for 30% slag substitution at maximum. The results proved that the ring cracking time increases while lowering the Blaine fineness or increasing slag substitution. A crack-resistant cements have upper limits for 2-day compressive strength and Blaine fineness which are for Portland cements as 27.7 MPa and 312 m2 /kg, respectively. The results show that only two out of ten commercial cements can be considered as crack-resistant, while cements on-demand increase this ratio to 10 out of 15.

Název v anglickém jazyce

Crack-Resistance of 25 Cements Determined by the Ring Shrinkage Test

Popis výsledku anglicky

Cement-based materials are known for shrinkage strain on drying, causing easily crack initiation under internal or external restraint. Higher crack resistance can be achieved by slowing down the strength gain with slower chemical shrinkage evolution. The ring shrinkage test provides an accelerated method how to quantify cracking resistance on drying, supported with long-term experiments for concrete surface cracking. The experiments presented in this paper use ring shrinkage tests for 25 mortars, which cover 10 commercial cements and 15 on- demand cements, spanning Portland cements and blended cements for 30% slag substitution at maximum. The results proved that the ring cracking time increases while lowering the Blaine fineness or increasing slag substitution. A crack-resistant cements have upper limits for 2-day compressive strength and Blaine fineness which are for Portland cements as 27.7 MPa and 312 m2 /kg, respectively. The results show that only two out of ten commercial cements can be considered as crack-resistant, while cements on-demand increase this ratio to 10 out of 15.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA21-03118S" target="_blank" >GA21-03118S: Termo-hygro-mechanický model betonových vozovek</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

International RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures

ISBN

978-3-031-33210-4

ISSN

2211-0844

e-ISSN

—

Počet stran výsledku

10

Strana od-do

1059-1068

Název nakladatele

Springer

Místo vydání

Cham

Místo konání akce

Adamas

Datum konání akce

14. 6. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—