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Open access
Datum
2022-01Typ
- Conference Paper
ETH Bibliographie
yes
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Abstract
Weak water resistance is a big obstacle for clay materials to overcome in modern construction industry. Compared to the hydraulic stabilized additives, bio-additives have a lower carbon footprint and have been used in many vernacular construction techniques to immobilize clay. In this work, the traditional recipes of tannin and iron have been revisited, in particular, the question of pH and iron solubility has been explored. Oak tannin and FeCl3 were chosen and their influence on the properties of clay materials in terms of rheological properties, compressive strength, and water resistance were characterized in the lab. Based on the results, tannin can reduce the yield stress of paste while with the addition of FeCl3, the yield stress of tannin dispersed pastes increased to a value similar to the reference sample but lower than the value contain only FeCl3. The increase was attributed to the complex reaction between tannin and Fe3+. The iron-tannin complexes can also increase the samples’ strength and water resistance. Although the complexes did not change the hydrophilic properties of the samples’ surface, they prevent the ingression of water. These results are very promising as they allow the production of a fluid earth material that is water-resistant. This opens a wide range of application potentials and can help to mainstream earth materials in construction. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000492253Publikationsstatus
publishedExterne Links
Buchtitel
Construction Technologies and ArchitectureBand
Seiten / Artikelnummer
Verlag
Trans Tech PublicationsKonferenz
Thema
Clay materials; Water resistance; Tannin; Iron compounds; ComplexationOrganisationseinheit
03972 - Habert, Guillaume / Habert, Guillaume
02655 - Netzwerk Stadt u. Landschaft ARCH u BAUG / Network City and Landscape ARCH and BAUG
ETH Bibliographie
yes
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