R&D result detail

Original Title

Chloride and combined chemical attack of saline solutions on modified oil well cement pastes

English Title

Chloride and combined chemical attack of saline solutions on modified oil well cement pastes

Type

WoS Article

Original Abstract

The effect of complex geothermal water composition in comparison with that of a single NaCl solution was studied on cement pastes prepared by partial substitution of cement with silica fume and metakaolin in different proportions. After 90 days of hydration in solutions or water, TGA, XRD, FTIR, ion chromatography, SEM, volume change, and compressive strength (CS) measurements were used to evaluate the impact of solutions on the systems. Higher Al3+ content in blended samples resulted in a greater ability to bind chlorides in Cl-AFm. A lower amount of free Cl- restrained delayed ettringite formation. Less significant volume changes together with the formation of C-(A-)S-H phases promoted by both solutions led to lower porosities and higher CSs than those of referential paste. NaCl solution showed a bigger negative influence than the geothermal one.

English abstract

The effect of complex geothermal water composition in comparison with that of a single NaCl solution was studied on cement pastes prepared by partial substitution of cement with silica fume and metakaolin in different proportions. After 90 days of hydration in solutions or water, TGA, XRD, FTIR, ion chromatography, SEM, volume change, and compressive strength (CS) measurements were used to evaluate the impact of solutions on the systems. Higher Al3+ content in blended samples resulted in a greater ability to bind chlorides in Cl-AFm. A lower amount of free Cl- restrained delayed ettringite formation. Less significant volume changes together with the formation of C-(A-)S-H phases promoted by both solutions led to lower porosities and higher CSs than those of referential paste. NaCl solution showed a bigger negative influence than the geothermal one.

Keywords

Combined chemical attack, Chloride attack, Silica fume, Metakaolin, Geothermal water

Key words in English

Combined chemical attack, Chloride attack, Silica fume, Metakaolin, Geothermal water

Authors

COMPELOVA, K.; TAWFIK, T.; BUNOVA, L.; SLANY, M.; MÁSILKO, J.; KUZIELOVA, E.

RIV year

2026

Released

01.07.2025

Periodical

Journal of Thermal Analysis and Calorimetry

Volume

150

Number

14

State

Hungary

Pages from

10821

Pages to

10838

Pages count

18

URL

https://link.springer.com/article/10.1007/s10973-025-14483-3

BibTex

@article{BUT200506,
  author="{} and  {} and  {} and  {} and Jiří {Másilko} and  {}",
  title="Chloride and combined chemical attack of saline solutions on modified oil well cement pastes",
  journal="Journal of Thermal Analysis and Calorimetry",
  year="2025",
  volume="150",
  number="14",
  pages="10821--10838",
  doi="10.1007/s10973-025-14483-3",
  issn="1388-6150",
  url="https://link.springer.com/article/10.1007/s10973-025-14483-3"
}