Publication detail

Influence of salts of simple carboxylic acids on hydration and basic properties of RPC

ŠULEKOVÁ N. NOVOTNÝ R. ŠOUKAL F.

Original Title

Influence of salts of simple carboxylic acids on hydration and basic properties of RPC

Type

abstract

Language

English

Original Abstract

This work aims to study whether it would be possible to use compounds of simple carboxylic acids and alkali metals in order to increase the workability of RPC and how these affect the hydration of RPC and its mechanical properties. These substances were added together with superplasticizers. Therefore, paper deals with possibility of increase in workability which would be higher when compared to the sole addition of only the superplasticizers themselves. The effect of alkali metal formates and propionates on flow, mechanical properties and pH of RPC was studied. The effect of replacing them with calcium formate on the listed properties was also monitored. Furthermore, the influence of potassium formate, potassium acetate and potassium propionate on the hydration of RPC was observed with the help of isothermal calorimetry. The influence of their replacement with calcium formate and with calcium oxide was also monitored. The results showed that potassium formate, potassium propionate, sodium formate and sodium propionate in combination with calcium formate can increase RPC workability. But it is necessary to add an optimal ratio of alkali metal formate/propionate - calcium formate, because a higher content of calcium formate, on the contrary, leads to a decrease in flow. 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. Its replacement with calcium formate has no significant effect on the induction period. In contrast, the addition of potassium acetate or propionate leads to an increase in the total amount of heat developed in the induction period, and their replacement with calcium formate leads to its gradual decrease.

Keywords

reactive powder concrete, carboxylic acid, alkali metals, calcium formate, workability

Authors

ŠULEKOVÁ N.; NOVOTNÝ R.; ŠOUKAL F.

Released

28. 8. 2023

Publisher

Central and Eastern European Committee for Thermal Analysis and Calorimetry (CEEC-TAC)

ISBN

978-606-11-8461-3

Book

CEEC-TAC7 BOOK OF ABSTRACTS

Edition number

1

Pages from

279

Pages to

279

Pages count

1

URL

https://www.ceec-tac.com/conf7/welcome.html

BibTex

@misc{BUT185107,
  author="Nikola {Šuleková} and Radoslav {Novotný} and František {Šoukal}",
  title="Influence of salts of simple carboxylic acids on hydration and basic
properties of RPC",
  booktitle="CEEC-TAC7 
BOOK OF ABSTRACTS",
  year="2023",
  edition="1",
  pages="279--279",
  publisher="Central and Eastern European Committee for Thermal Analysis and Calorimetry (CEEC-TAC)",
  isbn="978-606-11-8461-3",
  url="https://www.ceec-tac.com/conf7/welcome.html",
  note="abstract"
}