Intrinsic Hydrophobicity of Rammed Earth

2nd International Conference on Innovative Materials, Structures and Technologies

Holub, M.^1 ; Stone, C.^2 ; Balintova, M.^1 ; Grul, R.^3

Technical University of Kosice, Institute of Environmental Engineering, Faculty of Civil Engineering, Vysokoskolska 4, Kosice

042 00, Slovakia^1

Technical University of Kosice, Faculty of Civil Engineering, Building Construction Laboratory, Vysokoskolska 4, Kosice

042 00, Slovakia^2

Technical University of Kosice, External Relation and Marketing Office, Faculty of Civil Engineering, Vysokoskolska 4, Kosice

042 00, Slovakia^3

关键词: Built environment;    Driving rain;    Large roofs;    Natural composites;    Rammed earth;    Surface coatings;    Vapour diffusions;    Water repellents;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/96/1/012024/pdf
DOI  :  10.1088/1757-899X/96/1/012024

来源: IOP

【 摘 要 】

Rammed earth is well known for its vapour diffusion properties, its ability to regulate humidity within the built environment. Rammed earth is also an aesthetically iconic material such as marble or granite and therefore is preferably left exposed. However exposed rammed earth is often coated with silane/siloxane water repellents or the structure is modified architecturally (large roof overhangs) to accommodate for the hydrophilic nature of the material. This paper sets out to find out optimal hydrophobicity for rammed earth based on natural composite fibres and surface coating without adversely affecting the vapour diffusivity of the material. The material is not required to be waterproof, but should resist at least driving rain. In order to evaluate different approaches to increase hydrophobicity of rammed earth surface, peat fibres and four types of repellents were used.