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Durability of Hydrophobic Treatments on Concrete

Antons, U. / Raupach, M. / Weichold, O.

The paper deals with the durability of hydrophobic layers in concrete, investigated by using non-destructive single-sided nuclear magnetic resonance (NMR). With this measuring technology, the amount and distribution of water as well as of hydrophobing agents inside the concrete can be visualised. By comparing NMR measurements of single specimen over time, changes in the hydrophobic layer properties can be seen. Results after UV radiation, alkaline storage and carbonation show the different effects of each exposure. The investigated hydrophobing agents for application on concrete were stable during long term exposure in alkaline solution. The effect of UV radiation was limited to the roll-off behaviour of the concrete surface. The results after CO₂ exposure show that structural changes caused by carbonation of blast furnace slag cement based concrete decrease the hydrophobic layer thickness, while carbonation of Portland cement concrete has no influence. In addition, efficacy tests show that water transport through the affected hydrophobic layers of blast furnace slag concrete is accelerated.

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Durability of Hydrophobic Treatments on Concrete

Antons, U. / Raupach, M. / Weichold, O.

The paper deals with the durability of hydrophobic layers in concrete, investigated by using non-destructive single-sided nuclear magnetic resonance (NMR). With this measuring technology, the amount and distribution of water as well as of hydrophobing agents inside the concrete can be visualised. By comparing NMR measurements of single specimen over time, changes in the hydrophobic layer properties can be seen. Results after UV radiation, alkaline storage and carbonation show the different effects of each exposure. The investigated hydrophobing agents for application on concrete were stable during long term exposure in alkaline solution. The effect of UV radiation was limited to the roll-off behaviour of the concrete surface. The results after CO₂ exposure show that structural changes caused by carbonation of blast furnace slag cement based concrete decrease the hydrophobic layer thickness, while carbonation of Portland cement concrete has no influence. In addition, efficacy tests show that water transport through the affected hydrophobic layers of blast furnace slag concrete is accelerated.

Durability of Hydrophobic Treatments on Concrete

Antons, U. / Raupach, M. / Weichold, O.

The paper deals with the durability of hydrophobic layers in concrete, investigated by using non-destructive single-sided nuclear magnetic resonance (NMR). With this measuring technology, the amount and distribution of water as well as of hydrophobing agents inside the concrete can be visualised. By comparing NMR measurements of single specimen over time, changes in the hydrophobic layer properties can be seen. Results after UV radiation, alkaline storage and carbonation show the different effects of each exposure. The investigated hydrophobing agents for application on concrete were stable during long term exposure in alkaline solution. The effect of UV radiation was limited to the roll-off behaviour of the concrete surface. The results after CO₂ exposure show that structural changes caused by carbonation of blast furnace slag cement based concrete decrease the hydrophobic layer thickness, while carbonation of Portland cement concrete has no influence. In addition, efficacy tests show that water transport through the affected hydrophobic layers of blast furnace slag concrete is accelerated.

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Title:

Durability of Hydrophobic Treatments on Concrete

Contributors:

Andrade, Carmen (editor) / Gulikers, Joost (editor) / Polder, Rob (editor) / Antons, U. (author) / Raupach, M. (author) / Weichold, O. (author)

Published in:

Durability of Reinforced Concrete from Composition to Protection ; Chapter: 4 ; 35-43

Publication date:

2014-08-22

Size:

9 pages

ISBN:

978-3-319-09921-7 , 978-3-319-09920-0

DOI:

https://doi.org/10.1007/978-3-319-09921-7_4

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Hydrophobing agent , Durability , Non-destructive testing Engineering , Building Materials , Solid Mechanics , Structural Materials

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