Compatibility of Polymer-Composite Reinforcement with Cement Concrete in Structures

The adhesion of fiberglass reinforcement of industrially produced profiles with cement concrete under the impact of some technological and operational factors has been studied. A significant difference in the fracture characteristics of both materials in the zone of their contact, which depends on the type of surface profile of the reinforcement, concrete grade and the aggressiveness of the external environment, has been established. The best results concerning the adhesion strength were obtained for the polymer-composite reinforcement (PCR) with “sunken” screw and “sandy” profiles. The tests of concrete beams with difference scheme of reinforcement made it possible to discover an “effect of small diameters” which expresses in the increased rigidity and bearing capacity of beams with a smaller diameter of PCR in cross-section due to more complete inclusion of them in operation under loading. Technological recommendations on production of PCR and recommendations on design of flexural products and their calculation are made.

V.G. KHOZIN, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.R. GIZDATULLIN, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Kazan State University of Architecture and Engineering (1, Zelenaya Street, Kazan, 420043, Russian Federation)

1. Frolov N.P. Stekloplastikovaya armatura i stekloplastbetonnye konstruktsii [Glass-fiber plastic rebars and glassfiber plastic concrete structures]. Мoscow: Stroyizdat. 1980. 104 p. 
2. Mulin N.M. Sterzhnevaya armatura zhelezobetonnykh konstruktsiy [Bar reinforcement for concrete structures]. Мoscow: Stroyizdat. 1975. 233 p. (In Russian). 
3. Holmyansky M.M. Kontakt armaturi s betonom [Contact of reinforcement with concrete]. Мoscow: Stroyizdat. 1981. 184 p. 
4. Madatyan S.A. Armatura zhelezobetonnykh konstruktsiy [Reinforcement of reinforced concrete structures]. Мoscow: Voentekhlit. 2000. 256 p. 
5. Baena M. Experimental study of bond behaviour between concrete and FRP bars using a pull-out test. An International Journal «Composites Part B: Engineering». 2009, pp. 784–797. 
6. Wai How Soong, J. Raghavan, Sami H. Rizkalla. Fundamental mechanisms of bonding of glass fiber reinforced polymer reinforcement to concrete. Construction and Building Materials. 2011. Vol. 25. Iss. 6, pp. 2813–2821. 
7. Turusov R.A, Berlin A.A. Adhesion and adhesion mechanics. Materials Science News. Science and Technology. 2016. No. 2, pp. 17–23. (In Russian). 
8. Berlin A.A. [Polymer composite materials: structure, properties, technology]. Saint Petersburg: COP, Profession. 2014. 592 p. 
9. Kallister U., Rethvich D. Material Science: from technology to application (metals, ceramics, polymers). Translated with English. Ed. by Malkin A.Y. Saint Petersburg: Scientific bases and technologies. 2011. 896 p. 
10. Khozin V.G., Zykova E.S., Fakhrutdinova V.Kh., Gizdatullin A.R. Influence of alkaline environment of concrete on epoxide binders and polymer-composite reinforcement. Stroitel’nye Materialy [Construction Materials]. 2015. No. 1. С. 41–44. (In Russian).