Paper presents a review of scientific works investigating of effect of carbon nanotubes (CNT) concentration on electrical conductivity and pizeresistive properties of concrete. Different values of the percolation threshold for nanomodified concrete obtained by different authors are given. Recommendations for specifying the favorable concentration of nanotubes in composites are considered. As a result of review a need for additional dedicated research for the assessment of relation between favorable CNT concentration and their characteristics, method for the producing of composite and conditions of its application is stated.

Keywords: concrete, sensor, carbon nanotubes, percolation threshold, electrical conductivity, monitoring of stress-strain state

Paper presents results of full-scale test to failure of reinforced concrete room-sized module type "cap" by static loading. Loading process, used testing facilities, loading and measuring equipment are described. Obtained data considering module's strength, stiffness and cracking resistance are given.

Keywords: room unit, static loading test, data acquisition system, strain transducer