Hygric properties of hydrophobized building materials

Vasilis Soulios*, Ernst Jan de Place Hansen, Hans Janssen

*Corresponding author

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Moisture loads due to wind-driven rain can lead to accelerated decay of exposed building façades. Hydrophobic impregnation reduces water absorption of facade materials and is thus presumed to decrease moisture related damages. Hydrophobic impregnation however also lowers the drying speed of the exposed facade, leaving mainly water vapour transfer to take place. This study examines the open porosity and capillary absorption coefficient of impregnated brick samples as well as the effect of hydrophobic impregnation on the vapour permeability of brick and mortar samples. The open porosity was measured with vacuum saturation test, the absorption coefficient was determined by water uptake tests, both done after one month of curing of the impregnated brick samples. The vapour permeability was derived from cup tests and from drying tests. The resulting open porosity from brick samples indicates that the changes in the overall pore structure are minimal after impregnation. In addition, the absorption coefficient of brick was found to be fairly close to zero, even with low concentrations of active ingredient, and regardless the percentage of silane/siloxane. Our findings support the claim that the hydrophobic impregnation does not influence significantly the water vapour permeability of brick and mortar
Original languageEnglish
Title of host publication4th Central European Symposium on Building Physics (CESBP 2019) : Prague, Czech Republic, September 2-5, 2019
EditorsR. Černý, J. Kočí , V. Kočí
Number of pages6
PublisherEDP Sciences
Publication date6 Sep 2019
Pages1-6
Article number02048
DOIs
Publication statusPublished - 6 Sep 2019
Event4th Central European Symposium on Building Physics 2019 - Czech Technical University in Prague, Prague, Czech Republic
Duration: 2 Sep 20195 Sep 2019
https://www.cesbp2019.org/

Conference

Conference4th Central European Symposium on Building Physics 2019
LocationCzech Technical University in Prague
CountryCzech Republic
CityPrague
Period02/09/201905/09/2019
Internet address
SeriesMATEC Web of Conferences
Volume282
ISSN2261-236X

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absorption coefficient
mortar
porosity
permeability
water vapor
moisture
water uptake
brick
saturation
damage
test
water
drying

Cite this

Soulios, V., de Place Hansen, E. J., & Janssen, H. (2019). Hygric properties of hydrophobized building materials. In R. Černý, J. Kočí , & V. Kočí (Eds.), 4th Central European Symposium on Building Physics (CESBP 2019): Prague, Czech Republic, September 2-5, 2019 (pp. 1-6). [02048] EDP Sciences. MATEC Web of Conferences, Vol.. 282 https://doi.org/10.1051/matecconf/201928202048
Soulios, Vasilis ; de Place Hansen, Ernst Jan ; Janssen, Hans. / Hygric properties of hydrophobized building materials. 4th Central European Symposium on Building Physics (CESBP 2019): Prague, Czech Republic, September 2-5, 2019. editor / R. Černý ; J. Kočí ; V. Kočí . EDP Sciences, 2019. pp. 1-6 (MATEC Web of Conferences, Vol. 282).
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title = "Hygric properties of hydrophobized building materials",
abstract = "Moisture loads due to wind-driven rain can lead to accelerated decay of exposed building fa{\cc}ades. Hydrophobic impregnation reduces water absorption of facade materials and is thus presumed to decrease moisture related damages. Hydrophobic impregnation however also lowers the drying speed of the exposed facade, leaving mainly water vapour transfer to take place. This study examines the open porosity and capillary absorption coefficient of impregnated brick samples as well as the effect of hydrophobic impregnation on the vapour permeability of brick and mortar samples. The open porosity was measured with vacuum saturation test, the absorption coefficient was determined by water uptake tests, both done after one month of curing of the impregnated brick samples. The vapour permeability was derived from cup tests and from drying tests. The resulting open porosity from brick samples indicates that the changes in the overall pore structure are minimal after impregnation. In addition, the absorption coefficient of brick was found to be fairly close to zero, even with low concentrations of active ingredient, and regardless the percentage of silane/siloxane. Our findings support the claim that the hydrophobic impregnation does not influence significantly the water vapour permeability of brick and mortar",
author = "Vasilis Soulios and {de Place Hansen}, {Ernst Jan} and Hans Janssen",
year = "2019",
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doi = "https://doi.org/10.1051/matecconf/201928202048",
language = "English",
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Soulios, V, de Place Hansen, EJ & Janssen, H 2019, Hygric properties of hydrophobized building materials. in R Černý, J Kočí & V Kočí (eds), 4th Central European Symposium on Building Physics (CESBP 2019): Prague, Czech Republic, September 2-5, 2019., 02048, EDP Sciences, MATEC Web of Conferences, vol. 282, pp. 1-6, Prague, Czech Republic, 02/09/2019. https://doi.org/10.1051/matecconf/201928202048

Hygric properties of hydrophobized building materials. / Soulios, Vasilis; de Place Hansen, Ernst Jan; Janssen, Hans.

4th Central European Symposium on Building Physics (CESBP 2019): Prague, Czech Republic, September 2-5, 2019. ed. / R. Černý; J. Kočí ; V. Kočí . EDP Sciences, 2019. p. 1-6 02048 (MATEC Web of Conferences, Vol. 282).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

TY - GEN

T1 - Hygric properties of hydrophobized building materials

AU - Soulios, Vasilis

AU - de Place Hansen, Ernst Jan

AU - Janssen, Hans

PY - 2019/9/6

Y1 - 2019/9/6

N2 - Moisture loads due to wind-driven rain can lead to accelerated decay of exposed building façades. Hydrophobic impregnation reduces water absorption of facade materials and is thus presumed to decrease moisture related damages. Hydrophobic impregnation however also lowers the drying speed of the exposed facade, leaving mainly water vapour transfer to take place. This study examines the open porosity and capillary absorption coefficient of impregnated brick samples as well as the effect of hydrophobic impregnation on the vapour permeability of brick and mortar samples. The open porosity was measured with vacuum saturation test, the absorption coefficient was determined by water uptake tests, both done after one month of curing of the impregnated brick samples. The vapour permeability was derived from cup tests and from drying tests. The resulting open porosity from brick samples indicates that the changes in the overall pore structure are minimal after impregnation. In addition, the absorption coefficient of brick was found to be fairly close to zero, even with low concentrations of active ingredient, and regardless the percentage of silane/siloxane. Our findings support the claim that the hydrophobic impregnation does not influence significantly the water vapour permeability of brick and mortar

AB - Moisture loads due to wind-driven rain can lead to accelerated decay of exposed building façades. Hydrophobic impregnation reduces water absorption of facade materials and is thus presumed to decrease moisture related damages. Hydrophobic impregnation however also lowers the drying speed of the exposed facade, leaving mainly water vapour transfer to take place. This study examines the open porosity and capillary absorption coefficient of impregnated brick samples as well as the effect of hydrophobic impregnation on the vapour permeability of brick and mortar samples. The open porosity was measured with vacuum saturation test, the absorption coefficient was determined by water uptake tests, both done after one month of curing of the impregnated brick samples. The vapour permeability was derived from cup tests and from drying tests. The resulting open porosity from brick samples indicates that the changes in the overall pore structure are minimal after impregnation. In addition, the absorption coefficient of brick was found to be fairly close to zero, even with low concentrations of active ingredient, and regardless the percentage of silane/siloxane. Our findings support the claim that the hydrophobic impregnation does not influence significantly the water vapour permeability of brick and mortar

U2 - https://doi.org/10.1051/matecconf/201928202048

DO - https://doi.org/10.1051/matecconf/201928202048

M3 - Article in proceeding

T3 - MATEC Web of Conferences

SP - 1

EP - 6

BT - 4th Central European Symposium on Building Physics (CESBP 2019)

A2 - Černý, R.

A2 - Kočí , J.

A2 - Kočí , V.

PB - EDP Sciences

ER -

Soulios V, de Place Hansen EJ, Janssen H. Hygric properties of hydrophobized building materials. In Černý R, Kočí J, Kočí V, editors, 4th Central European Symposium on Building Physics (CESBP 2019): Prague, Czech Republic, September 2-5, 2019. EDP Sciences. 2019. p. 1-6. 02048. (MATEC Web of Conferences, Vol. 282). https://doi.org/10.1051/matecconf/201928202048