Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 323, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2022.126571
Keywords
Clay materials; Oak tannin; Iron chloride; Water resistance; Interaction
Categories
Funding
- China Scholarship Council [201806090282]
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This paper proposes a simple and robust additive solution to improve the water-resistance of clay materials by revisiting a traditional recipe. The combination of oak tannin with iron chloride is shown to enhance the rheological behavior, compressive strength, and water resistance of clay materials through complexation reaction between iron ions and tannin, preventing water ingression.
The objective of this paper is to propose a simple and robust additive solution to improve the water-resistance of clay materials by revisiting a traditional recipe of vernacular construction. The influence of the combination of oak tannin with iron chloride on the properties of clay materials in terms of rheological behavior, compressive strength, and water resistance was studied. We show that adding iron chloride can annihilate the deflocculation action of tannin by a complexation reaction between iron ions and tannin. The accumulation and oxidation of formed complex at the sample surface, identified by TGA and SEM, prevent water ingression.
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