JOINT WORK OF COMPOSITE REINFORCEMENT WITH LIGHT AND HEAVY CONCRETE

Abstract

The results of experimental studies of the adhesion of composite fiberglass reinforcement with foam concrete class B3.5 and heavy concrete class C12/15 (B15) are presented in the article. Various non-reinforced and reinforced products can be made of non-autoclaved foam concrete, such as blocks for building walls and floors, monolithic slabs and floors, stairs, etc.To increase the energy efficiency of buildings, it is recommended to use the joint work of "warm" materials as relatively low-strength foam concrete and composite reinforcement, which are similar in thermal conductivity. For widespread use of foam concrete in span structures, as well as heavy concrete, it is necessary to solve the problem of low strength cellular concrete. In general, the reduced strength of foam concrete could be compensated by inserting reinforcing bars in a stretched area, but it is clear that they will be much stronger than such cellular concrete. Increasing the strength of foam concrete will automatically lead to an undesirable increase in its density and thermal conductivity. Therefore, it is necessary to find the optimal proportions during the conduction of the experimental studies.The work of concrete and metal reinforcement is mainly ensured by engaging the protrusions on the surface of the rods for concrete, and in the case of composite reinforcement adhesion is mainly due to the adhesive ability of the cement gel.The adhesion of fiberglass reinforcement is approximately 10-15 times less than in heavy concrete. In addition to the low strength of foam concrete and adhesion to fiberglass reinforcement in general, an important role in this is also played by the absence of significant protrusions on the surface of the rods and their roundness.In construction, it would be advisable to use fiberglass reinforcement in foam concrete during of bridges construction, floors and stairs, as well as in the construction of monolithic building walls.