Publication detail

Influence of Sulphate Attack on Properties of Modified Cement Composites

YAKOVLEV, G. POLYANSKIKH, I. GORDINA, A. PUDOV, I. ČERNÝ, V. GUMENYUK, A. SMIRNOVA, O.

Original Title

Influence of Sulphate Attack on Properties of Modified Cement Composites

Type

journal article in Web of Science

Language

English

Original Abstract

Monitoring the condition of building structures based on composite materials in aggressive environments shows that the deterioration of basic properties occurs under the influence of various factors such as temperature and humidity changes, in addition to changes in the chemical composition of air environment. In addition, the composite materials during the operation must retain not only the mechanical properties laid down at the design stage, but also the electro-physical characteristics, regardless of the type of destructive effects. In the current study, the quantitative assessment of the result of the interaction of an aggressive sulphate-containing medium with composites modified with conductive and dielectric additives was carried out. The effect of sulphate attack on the specific electrical conductivity of cement composites was studied. The nature of the interaction was evaluated by changing the properties of the samples of the developed compositions under the influence of a single-normal solution of sodium sulphate. The analysis was carried out by means of potentiometric titration using the exchange interaction method by fixing the degree of absorption of sulphate ions and determining the concentration of calcium ions in the solution. The measurement of the solution potential allowed determination of the quantitative indicators of the rate of calcium hydroxide leaching from the sample structure, which is necessary to assess the intensity of the destruction process and determine the nature of the change in strength properties. Measurements of the electrical resistivity of samples under the constant influence of sulphate aggression were taken during 28 days of observation. A method for quantifying the effect of a sulphate medium on a cement matrix was proposed that enables the material durability to be predicted. The features of changes in the morphology of structural components after exposure to aggressive solution were determined by physical and chemical methods.

Keywords

concretes;mechanical properties; sulphur compounds; sulphate attack resistance; impedance; electrical properties; sulphate attack

Authors

YAKOVLEV, G.; POLYANSKIKH, I.; GORDINA, A.; PUDOV, I.; ČERNÝ, V.; GUMENYUK, A.; SMIRNOVA, O.

Released

13. 9. 2021

Publisher

MDPI

ISBN

2076-3417

Periodical

Applied Sciences - Basel

Year of study

11

Number

18

State

Swiss Confederation

Pages from

1

Pages to

13

Pages count

13

URL

https://doi.org/10.3390/app11188509

Full text in the Digital Library

http://hdl.handle.net/11012/204040

BibTex

@article{BUT176632,
  author="G.I. {Yakovlev} and Irina {Polyanskikh} and A. F. {Gordina} and Igor {Pudov} and Vít {Černý} and Alexander {Gumenyuk} and Olga {Smirnova}",
  title="Influence of Sulphate Attack on Properties of Modified Cement Composites",
  journal="Applied Sciences - Basel",
  year="2021",
  volume="11",
  number="18",
  pages="1--13",
  doi="10.3390/app11188509",
  issn="2076-3417",
  url="https://doi.org/10.3390/app11188509"
}