MATEC Web Conf.
Volume 86, 20165th International Scientific Conference “Integration, Partnership and Innovation in Construction Science and Education”
|Number of page(s)||8|
|Section||4 Building materials and Technologies|
|Published online||28 November 2016|
Pipeline walls hydrophobic properties study and their protective coatings used in trenchless technologies
Moscow State University of Civil Engineering (National Research University), Department of Water Supply and Water Disposal, Yaroslavskoye sh. 26, 129337 Moscow, Russia
* Corresponding author: email@example.com
The results of field and theoretical studies to determine the degree of hydrophobicity of the inner pipe walls in static and dynamic conditions are reported. The water drops spreading nature in contact with the horizontal and concave surface of different materials with the definition of contact angles is determined. The flow pattern formed when the critical mass of liquid miniflow is reached on an inclined surface in the form of an open trough was studied. The geometric parameters of the frontal and coaxial miniflow projections were determined, its dimensions and hydraulic characteristics were studied. The trial stand design for the protective coatings hydrophobic properties study was presented and described and method of evaluation of the pipeline work surfaces hydrophobic properties by applying the relative hydrophobicity ratio. Calculation formulas of the relative hydrophobicity ratio for work surfaces were presented. The relationships of hydrophobicity of various coatings used in the trenchless technologies to relative roughness coefficients were established.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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