Time filter

Source Type

Saint Petersburg, Russia

Vasiliev N.K.,The B. E. Vedeneev VNIIG Inc. | Pronk A.D.C.,TU Eindhoven | Shatalina I.N.,The B. E. Vedeneev VNIIG Inc. | Janssen F.H.M.E.,TU Eindhoven | Houben R.W.G.,TU Eindhoven
Cold Regions Science and Technology

Carrying building materials into remote cold regions makes construction in these regions difficult and rather expensive. The need for such materials can be reduced by the use of both ice and ice-soil composites. In cold regions ice is abundant and cheap. However, using ice as a building material has some limitations. It is a relatively weak material and shows an extreme creep behavior compared to conventional building materials; mechanical properties are strongly temperature dependent and melt protection is necessary even in the coldest areas. The behavior of ice can be improved by reinforcement. Ice composites have been applied successfully in engineering structures. In this paper the classification of various methods of ice (-soil) reinforcement is presented. Despite the fact that there are many studies on ice reinforcement, ice composites have a very limited application. At present there are only three types of reinforced ice structures: (i) ice roads reinforced by geomaterials, (ii) watertight elements in the dam of Irelyakh hydro system in Siberia and (iii) ice structures on an inflatable mold constructed in the winters of 2014 and 2015 in Finland. Currently ice reinforcement methods are not widely used in construction. The aim of this paper is to carry out research to further introduce ice reinforcement into the practice of construction when feasible. The authors show that there is a need to stimulate the development of a building method for ice composites. © 2015 Elsevier B.V. Source

Vasiliev N.K.,The B. E. Vedeneev VNIIG Inc. | Ivanov A.A.,The B. E. Vedeneev VNIIG Inc. | Sokurov V.V.,The B. E. Vedeneev VNIIG Inc. | Shatalina I.N.,The B. E. Vedeneev VNIIG Inc. | Vasilyev K.N.,Halcrow Group Ltd.
Cold Regions Science and Technology

This paper considers the strengthening of both frozen soils and the soils after thawing in ice-soil composites generated by the method of cryotropic gel formation. The properties of the frozen soils (ice-soil composites) have to be improved for example in order to create reliable materials with low filtration factor for building weirs and other hydrotechnical constructions, which operate under a wide range of temperatures, including positive temperatures. The application of this method is very promising in terms of the creation of almost impermeable curtains for hydrotechnical structures in cold regions. It is very important that such elements are safe in both frozen and thawing conditions. Aqueous solutions of polyvinyl alcohol (PVA) are used for the formation of cryogels. This paper shows that the ice-soil composites, obtained by using the method of cryotropic gel formation, are sufficiently strong and watertight during thawing. Experimental data are provided. © 2011 Elsevier B.V. Source

Discover hidden collaborations