THE POSSIBILITY OF CONTROLLING THE STRUCTURE AND PROPERTIES OF FIBER-REINFORCED CONCRETE METHOD OF LASER-ULTRASONIC STRUCTUROSCOPY

The possibility of controlling the structure and properties of fiber-reinforced concrete method of laser-ultrasonic testing. Increased safety requirements for buildings and structures has led to the creation of high-strength and high-grade concrete with compressive strength of 100 MPa and higher, water resistance W12 and higher, frost resistance not less than the F400, as well as carbon fiber reinforced, carbon-carbon composites, fiberglass. Improved structural characteristics of these materials is associated with various reinforcing fibers. The paper provides an overview of non-destructive testing methods for the diagnosis of the structure and properties of heterogeneous media, described their shortcomings. It is proposed to assess the local modulus of elasticity, porosity, bundles, and other defects using laser ultrasonic structuroscopy. For carbon fiber reinforced composites based on optico-acoustic measurements obtained local values of the velocity of longitudinal waves, built 2D images of their internal structure.

Keywords

Fibro concrete, construction materials, non-destructive testing, laser-ultrasound structuroscopy.

Issue number: 7
Year: 2016
ISBN:
UDK: 653.3
DOI:
Authors: Karabutov A. A., Nguen Xuan Man, Pham Manh Hao, Cherepetskaya E. B., Shibaev I. A.

About authors: Karabutov A. A., Doctor of Physical and Mathematical Sciences, Head of Laboratory, Professor, International Educational and Scientific Laser Center, Lomonosov Moscow State University, Moscow, Russia, Nguen Xuan Man, Doctor of Technical Sciences, Director, Institute of Applied Mechanics and Informatics Vietnamese Academy of Science, Pham Manh Hao, Doctor of Technical Sciences, Deputy Director, Centre for High Technology Development, Vietnam Academy of Science, Cherepetskaya E. B., Doctor of Technical Sciences, Professor, e-mail: echerepetskaya@mail.ru, National University of Science and Technology «MISiS», 119049, Moscow, Russia. Shibaev I. A., Student, National University of Science and Technology «MISiS», 119049, Moscow, Russia.

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