A multi-parametric method for evaluating the quality indicators of nano-fiber concrete for a construction site
Abstract
Nano-fiber concrete is a building material for which a distinctive feature is an increase in the crack resistance characteristic. Determination of the stress intensity coefficient of nano-fiber concrete makes it possible to correctly assess the resistance of the material during the formation and development of cracks. The paper presents a multi-parametric method for evaluating the quality indicators of nano-fiber concrete. The proposed method makes it possible to evaluate the quality of the nano-fiber concrete structure in the laboratory and during construction work. Modern and well-known methods of non-destructive testing, such as ultrasonic sounding, ultrasound tomography, elastic rebound, separation with chipping, are used to carry out control at the construction site. For laboratory studies, the method provides for the production of samples-prisms. Test samples can be molded or cut out of the body of the structure. This technique makes it possible to study in laboratory conditions such parameters of the material as the tensile strength during bending, tensile strength at splitting, the critical coefficient of stress intensity at normal pull-off, the critical coefficient of stress intensity during transverse shear, energy consumption for individual stages of deformation and destruction of the sample. Moreover, it is provided to obtain all the parameters on one sample from the series, which eliminates errors and inaccuracies in the quality indicators of the material associated with different conditions of hardening, molding, inaccuracies in the duplication of the composition.
About the Authors
E. A. SadovskayaS. N. Leonovich
Belarusian National Technical University; Qingdao University of Technology
Belarus
Belarus
Doctor of Sciences (Engineering), Foreign Academic of RAACS
e-mail: snleonovich@yandex.ru
N. A. Budrevich
Belarusian National Technical University
Belarus
Belarus
Engineer
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Review
For citations:
Sadovskaya E.A., Leonovich S.N., Budrevich N.A. A multi-parametric method for evaluating the quality indicators of nano-fiber concrete for a construction site. Concrete and Reinforced Concrete. 2021;606(4):20-28. (In Russ.)
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