Author:
Dmitrieva M A,Sharanova A V,Leitsin V N
Abstract
Abstract
An experimental approach is proposed to study the evolution of structural and mechanical characteristics of cement stone in the process of hydration. This approach is based on the use of computed tomography methods and the determination of the strength at different times of the setting of concrete compositions. It is shown that modifying additives of calcium formate and redispersible polymer powder provide an increase in strength at the initial setting time. In this case, the highest strength value 30 minutes after mixing is achieved for a composition with 2% content of redispersible polymer powder by weight of cement. The highest density is demonstrated by compositions with additives of redispersible polymer powder. A developed experimental approach, combining a non-destructive computed tomography method and a direct assessment of the compressive strength of samples of multicomponent concrete of various compositions, makes it possible to effectively evaluate the effect of modifying additives on the properties of modified concrete.
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