Changes in the physicomechanical properties of materials of carbonate hardening on the basis of lime and lime stone systems with the course of time
The paper presents the study of changes in the physical and mechanical properties of prototypes based on lime-limestone compositions hardening in a medium with a high concentration of carbon dioxide, after storage in vivo for 24 months. The samples are cylinders of semi-dry pressing (pressing pressure - 30 MPa), made of a mixture of low-active lime dust and filler in the form of waste marble limestone. Studies have shown that there is an increase in the strength of the samples as a result of the transition of portlandite to calcite during forced carbonation, and as a result of recrystallization of rock-Edric calcite in rhombohedral form during storage of samples in vivo. The possibility of using soda production waste in the form of low-active lime dust and furnace gases in the production technology of durable building materials is proved.