Assessment of the possibility of using thermal insulation materials produced using ash and slag waste for the main roadbed platform

Abstract

The article briefly describes the planned modernization of the Southern Transsib stand-in, which allows faster delivery of goods to the Eastern Russian Railways Polygon from the mining and industrial centers of Southern Siberia. One of the problems in the construction of the second tracks on Southern Passage sections was raised, expressed in the search for solutions to stabilize the main roadbed platform. The fact is that one of the existing methods to combat the heaving of freezing and settlement of thawing soils does not always give the desired effect. We are talking about expanded polystyrene slabs. The defects of expanded polystyrene slabs during their laying are shown. A new material based on ash and slag waste for combating soil heaving is being considered. The material was developed and proposed by scientists from the Trans-Baikal Institute of Railway Transport. The possibility of using thermal insulation materials based on ash and slag waste for the main platform of the roadbed is being determined. The calculations were carried out using the Frost 3D Universal software package. The calculation is based on a real object on the Zapan – Tagul section of the Krasnoyarsk Railway. The conducted studies have shown that it is possible to use composite materials on especially heavily stressed lines, as well as lines of categories I-III on the main platform of the roadbed. However, this will require an increase in the thickness of the thermal insulation materials, which in turn may lead to an increase in the cost of the project. Nevertheless, on category IV lines, the use of composite materials is generally quite reasonable.