Building materials
For injection into the soil, various cement solutions are very often used. In the presence of voids of a larger size, a cement-sand mortar is used. The input of the cement mortar is carried out by discharge through the injector, which, in fact, is a syringe, just large sizes. Clay-cement mixtures can also be used. Often, special highly dispersed types of clay in a proportion of 1: 2 from cement volume are taken to prepare the solution. You can prepare an injection solution with the use of Portland cement, which provides the highest possible density of cement stone. Cementation is used mainly to consolidate rocky rocks, sandy soils.
Unexpected lime has the ability to dry moisturized soils, as well as change certain engineering and geological properties of soils. The main quality of lime is its ability to quickly grasp and hard when interacting with water. The negative lime is introduced into the base interacts with water, after which it has at the same time a draining and astringent effect on the soil. Lime and sand are also used to compact Lessial soils with soil piles. The peculiarity of lime piles is that they are three times increase the amount of lime in the process of extinguishing. The chemical processes that allow us to strengthen the soil include silicatization. Screw piles are also used in St. Petersburg and other cities that allow you to build houses on loose and weak soils. They are screwed into the soil to the desired depth, which ensures the correct position of the construction.
Silicatization is one of the most effective chemical methods for fixing the soil. Silicatization allows for a short period of time to stop siege processes in the base. The main material that is used in the processes of silicatization is considered to be liquid glass (NA20 SI02 + MH20), which is characterized by the following physical properties: a density that is 1.32-1.36 g/cm3, viscosity at a temperature of 18 ° C 40-50 MPa is mixed with water in extremely short time.
Thermal methods of hardening soils
Thermal fixing of the soils is based on the name of the name, on the heat treatment of soils with various gaseous products of the combustion of liquid fuel, which is burned next to the well or in the thickness of the soil. As practice shows, mainly the methods of thermal fixing of soils are used to destroy the subsidence properties of the bases, in order to strengthen the slopes of the embankments and the arrangement of foundations. In thermal methods, a variety of fuel types are used: natural gas, diesel fuel or other types of gas fuel. A mechanism that generates compressed air and the nozzle acts as the main elements of the heating element used for soil hardening.
