Efficiency of Stabilization of Sandy, Coarse-Grained and Technogenic Soils with Polymer Complexes and Surfactants of Structural Layers of Highways

The study was aimed at evaluating the effectiveness of using polymer-colloidal complexes based on acrylic and styrene as well as traditional ionogenic surfactants based on silicone compounds to stabilize soils in the preparation of materials based on sandy, coarse clastic and technogenic soils for the construction of load-bearing and additional base layers of motor road pavement. It has been established that the use of polymer-colloidal complex based on acrylic acid butyl ester copolymer and styrene has high efficiency in the development of composite material from coarse clastic soils, while the use of stabilizing additives for soils does not provide a significant increase in the physical and mechanical characteristics of samples based on sandy, coarse clastic and technogenic (granulated asphalt concrete) mixtures in complex with cement. The results indicate that the particle size composition of the mineral part has a significant impact on the efficiency of the use of additives for various functional purposes. Polymeric styrene-acrylic dispersions have a more significant effect on the composite material with coarse-grained particle size composition (C-6). It is connected with a more complete polymerization of the film on the surface of internal pores of the composite, which affects the level of structure formation of the whole system. It has been established that the removal of water from polymeric dispersions leads to the formation of its supramolecular structure at the boundary of the mineral binder (cement) and stone material, which contributes, as a rule, to increasing the adhesive interaction between them.