Influence of alkali metal formates and calcium formate on workability, hydration and basic properties of reactive powder concrete

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F24%3APU152511" target="_blank" >RIV/00216305:26310/24:PU152511 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s10973-024-13703-6" target="_blank" >https://link.springer.com/article/10.1007/s10973-024-13703-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-024-13703-6" target="_blank" >10.1007/s10973-024-13703-6</a>

Result language

angličtina

Original language name

Influence of alkali metal formates and calcium formate on workability, hydration and basic properties of reactive powder concrete

Original language description

This work aims to study whether it would be possible to use alkali metal formates and calcium formate in order to increase the workability of reactive powder concrete (RPC) and how these additives affect hydration, mechanical properties and mineralogical composition of RPC. These substances were added together with superplasticizer. Therefore, paper deals with possibility of increase in workability which would be higher when compared to the sole addition of only the superplasticizer themself. The effect of alkali metal formates and their replacement with calcium formate on slump flow, mechanical properties and pH of RPC was studied. Furthermore, the influence of potassium formate and its replacement with calcium formate and with calcium oxide on the hydration of RPC was observed with the help of isothermal calorimetry and thermal analysis. The results showed that the addition of studied compounds allows to achieve an increase in RPC slump flow. However, it is necessary to add these substances in an optimal ratio of alkali metal formate/calcium formate because a higher content of calcium formate leads to a decrease in slump flow. For ideal ratios, the compressive strength after 90 days is still above 218 MPa and the flexural strength is still above 23 MPa. In calorimetric measurements, it was observed that the addition of potassium formate leads to a decrease in the total amount of heat developed in the induction period. According to thermal analysis, additions of the studied additives to RPC caused changes in the content of portlandite and calcite.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/GA23-05082S" target="_blank" >GA23-05082S: The research on the combined effect of sulfur, copper and lithium oxides on the formation and properties of Portland cement clinker.</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

Name of the periodical

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

1588-2926

Volume of the periodical

neuveden

Issue of the periodical within the volume

říjen

Country of publishing house

HU - HUNGARY

Number of pages

20

Pages from-to

„“-„“

UT code for WoS article

001344779200001

EID of the result in the Scopus database

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