The Method of Producing Non-autoclaved Foam Concrete Based on Polymers for the Construction of Various Road Structures in Cold Regions

Abstract

The purpose of the investigation is to obtain the non-autoclaved foam concrete with increased thermal protection properties for various road structures. It is shown that to achieve this goal, polymers and dolomitized limestone are to be introduced into the foam concrete composition, which results in the decrease of the thermal conductivity coefficient of more than a class of average density. The interrelation of thermal conductivity coefficient of foam concrete with physical–chemical characteristic of its stone interlayer (crystal–amorphous ratio characterizing the amorphism degree of its stone structure) is scientifically proved. New technological solutions for road structures construction are proposed. It is shown that the use of foam concrete based on polymers in road structures allows to provide high frost resistance, which is especially important for construction in cold regions. In such regions, in order to arrange road structures on permafrost and heaving soils, they need increased thermal protection characteristics. The use of materials with a reduced thermal conductivity coefficient in their composition will prevent their destruction. When using foam concrete in railway embankments, the load on weak foundations is reduced. It is established that the solutions with simultaneous application of foam concrete of different classes of average density are the most effective. Fourier transform infrared spectroscopy and derivatographic methods of analysis were used in the study of the material obtained. The calculation of road structures was carried out in accordance with the regulatory documentation and showed a significant margin of frost resistance and the load reduction in a weak base.