МЕТОДИКА РАСЧЕТА ТРЕЩИНОСТОЙКОСТИ НОРМАЛЬНЫХ СЕЧЕНИЙ КАУТОНОВЫХ БАЛОК СО СМЕШАННЫМ АРМИРОВАНИЕМ

Abstract

Rubcon-polymer concrete based on liquid rubber. Due to the high tensile strength of the rubcon, structures made of it are recommended as structures with increased requirements for crack resistance, also should be noted that the value of the ratio of compressive strength to tensile strength lies in the range of 7-8, while in the case of the addition of dispersed reinforcement, this ratio of strength indicators is ~6. For comparison, it should be noted that the ratio of compressive strength to tensile strength for concrete class B25 is almost 15. This indicates the relevance of the use of rubber polymer-concrete as a material for the manufacture of bending elements. The objects of the study are beams of rectangular cross section from the rubber polymer (Rubcon) size 60х120х1400mm. It that the addition of fibers from the steel cord improves the crack resistance of normal section of up to 1.5 times experimentally was established. As a result of the review of literature sources, it was found that the existing methods of calculating the normal sections of bending elements need to be adapted and obtain their own empirical dependences for the calculation of beams from rubber concrete. As a result of the calculation of crack resistance according to the proposed method, the maximum difference of values in the rubcon beams is 5.9%, and in fibrocauton beams, 4.1%.