MECHANISMS AND FACTORS THAT WORSEN THE STRENGTH GAIN OF SOIL STABILIZED WITH CHEMICAL ADDITIVES USING THE EXAMPLE OF A MULTICOMPONENT HYDROPOLYMER AND A CONCENTRATED MINERAL MIXTURE OF POWER STAB

The article evaluates the effectiveness of using a multicomponent hydropolymer and a concentrated mineral mixture of POWER STAB in stabilizing and strengthening soils using soil samples from the construction site, namely the access road to the cluster of gas wells of the Kharasaveysky gas field. It was found that the maintenance of a complex of POWER STAB additives leads to a decrease in the strength parameters of reinforced soil samples compared with control samples without the use of modifiers. It is not possible to achieve the necessary physical and mechanical parameters of the reinforced soil according to the project with a cement consumption of 5% and a complex of additives (multicomponent hydropolymer and concentrated mineral mixture POWER STAB). At the same time, the strength grade of the samples of the design composition corresponds to M20 (the required grade must correspond to M60). The liquid stabilizer GP POWER STAB has a negative effect on the frost resistance of the reinforced soil. The frost resistance of the reinforced soil using the POWER STAB additive complex in accordance with the design composition was F15 (the required grade must correspond to F50). Based on the obtained physico-mechanical parameters, an attempt was made to determine the cause of the negative effect of POWER STAB additives on the properties of reinforced soil by examining the strength and structure of the cement stone into which these additives were introduced. A dried sample of the GP POWER STAB was also examined using IR spectroscopy.