MATEC Web Conf.
Volume 265, 2019International Geotechnical Symposium “Geotechnical Construction of Civil Engineering & Transport Structures of the Asian-Pacific Region” (GCCETS 2018)
|Number of page(s)||6|
|Section||Geotechnics for Roads, Railways, Airfields and Waterways|
|Published online||30 January 2019|
Onsite studies of phosphate compounds application for treatment of clayish soils in a railway bed
Emperor Alexander I St.Petersburg State Transport University, Moscovsky prospect 9, St. Petersburg, 190031, Russia
* Corresponding author: firstname.lastname@example.org
The article presents results of field studies dealing with strengthening clayishsoilsin a ground railway bed using phosphoric acid compounds in a DC electrical field. The authors performed comparison of deformability indicators obtained to those for soil treated by an alternative method using classical formulation based on calcium chloride. Modulus of deformation for soil treated with CaCl2-based electrolyte increased 1.3 times, and reached 19.5 MPa, modulus of deformation for soil treated with electrolyte based on Zn(H3PO4)2grewby a factor of 2.4, and reached 34.8 MPa. The paper shows the main engineering and process parameters of operations performed for altering the properties of clayish soils in a ground railway bed. Duration of soil treatment using the electrolyte based on calcium chloride was 27 days, while for the phosphate electrolyte it was 14 days. Power consumption was 10,800 kWh and 5,600 kWh, respectively.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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