COMPOSITE SOLUTIONS WITH ADDITIVES OF MICROCELLULOSE
Cellulose nanostructured elements are widely used for modifying building materials. The possibility of involving microcrystalline cellulose as modifiers of the structure of composite solutions at the stage of the curing process is considered. Structure formation in composite solutions with different content of microcellulose in the initial period before the transition to the cured state is studied. It was found that when microcrystalline cellulose is introduced into the composite solution, the structure formation of the system increases. It was found that the additives of microcellulose concentrations accelerate the curing time of the composite solution by 2-4 times compared to the control sample, accelerate the hydration of the clinker components of cement, thereby leading to an acceleration of the structure formation of composite solutions and, as a result, a reduction in the time of loss of their fluidity. It is shown that the highest rate of structure formation is achieved when using a composite solution based on p2t2a bentonite with an optimal addition of 0.01% microcellulose to the mass of cement, at which the setting time of the solution reaches the optimal value, and can be recommended for industrial safety of underground structures.