Soil Compositions Based on Binders from Carbonate Waste Rocks

The object of the study is a weak water-saturated soil. It is well known that soils with a high degree of humidity are difficult to compact and loosen. Natural drying of waterlogged clay soils occurs very slowly, and artificial methods are ineffective. At the same time, such soils are characterized by thixotropy of properties. Due to the above-mentioned features of water-saturated clay soil, a method of using complex mineral binders was chosen. The dependence of density and strength on the consumption of a complex binder is established: the density of the soil being fixed is inversely proportional to the content of slaked lime. The maximum compressive strength of the soil to be fixed is achieved with a lime content in the range of 26–32 wt.%. The optimal amount of lime is 28.3 wt.%, dolomite is sufficient in the amount of 30 wt.%, chrysotile asbestos − 7 wt.%. At the same time, strong crystals of hydrosilicates and hydroaluminates are formed in the soil fixed with chrysotile asbestos. Based on the conducted studies, it was concluded that the complex fixation of clay soil with chrysotile asbestos, polycarboxylates leads to an increase in the calculated resistance of the soil, improving its operational characteristics.