Publication detail

Substantiation of the Effectiveness of Water-Soluble Hydrophobic Agents on the Properties of Cement Composites

HODUL, J. BENÍKOVÁ, T. DROCHYTKA, R.

Original Title

Substantiation of the Effectiveness of Water-Soluble Hydrophobic Agents on the Properties of Cement Composites

Type

journal article in Web of Science

Language

English

Original Abstract

This paper aims to verify the effect of water-soluble hydrophobisations on cementitious composites such as concrete (S1) and cement-bonded particle boards (S2). The research was focused on the water-soluble hydrophobisations based on methylsilanolate (MS), a mixture of silanes and siloxanes (SS) and alcohol with the addition of nano-silica (N). The results provide a comprehensive overview of the benefits and effectiveness of water-soluble hydrophobisations in the context of building materials, outlining a direction towards the development of new, more environmentally friendly solutions in the construction industry. For this reason, alternative raw materials (brick recyclate and brick dust) were used for S1 substrate preparations. How the water-soluble hydrophobisations, including hydrophobisations with the addition of nano-silica (N), affect the process of water evaporation during hydration and the resulting water repellence of the S1 and S2 substrates were experimentally verified through a series of tests, e.g., measurement of the contact angle and depth of water penetration under pressure. The evaluation of the effect of hydrophobisations on the resistance of substrate to aggressive gaseous and liquid environments was observed by the determination of the resistance to carbonation and sulphation processes and the resistance of the concrete to aggressive liquid media (10% H2SO4, 10% CH3COOH). Although the hydrophobisations did not have a significant effect on some aspects of S1, such as the resistance to carbonation and sulphate attack, improvement was observed in other areas, such as the quadrupling increase in contact angle of the surface and 9 mm decrease in water pressure penetration into the concrete substrate.

Keywords

water-soluble hydrophobic agent; durability; concrete; cement-bonded particle board; contact angle; chemical resistance

Authors

HODUL, J.; BENÍKOVÁ, T.; DROCHYTKA, R.

Released

24. 10. 2024

Publisher

mdpi

ISBN

2075-5309

Periodical

Buildings

Year of study

14

Number

11

State

Swiss Confederation

Pages from

1

Pages to

23

Pages count

23

URL

https://www.mdpi.com/2075-5309/14/11/3364

BibTex

@article{BUT191169,
  author="Jakub {Hodul} and Tatiana {Beníková} and Rostislav {Drochytka}",
  title="Substantiation of the Effectiveness of Water-Soluble Hydrophobic Agents on the Properties of Cement Composites",
  journal="Buildings",
  year="2024",
  volume="14",
  number="11",
  pages="1--23",
  doi="10.3390/buildings14113364",
  issn="2075-5309",
  url="https://www.mdpi.com/2075-5309/14/11/3364"
}