CONCRETE

[:ru]Харитонов А. М.[:en]Kharitonov, А. М.[:] [:ru]д-р техн. наук, профессор, ФГБОУВ-ПО «Санкт-петербургский государственный архитектурно-строительный университет», Санкт-Петербург, Россия[:en]Dr Eng. Sci., Prof. Saint Petersburg State University of Architecture and Civil Engineering, Saint Petersburg, Russia[:]

[:ru]Рябова А. А.[:en]Ryabova, А. А.[:] [:ru]аспирант, ФГБОУВ-ПО «Санкт-петербургский государственный архитектурно-строительный университет», Санкт-Петербург, Россия[:en]PHd student, Saint Petersburg State University of Architecture and Civil Engineering, Saint Petersburg, Russia[:]

Alitinform №2-3 (43) 2016 г. 34-41 p.

Abstract

The article interprets physical and mechanical properties of glass-fiber reinforced concrete (GRC) as a function of the reinforcement level and binder consumption. In addition to the aforementioned research results, it also presents data on flexural and compressive strength of GRC. The correlation between long-term strains (creep and shrinkage) and the reinforcement level has been identified as well. We have established that adding glass fiber would cause significant growth of flexural strength accompanied, however, with a slight decrease in compression strength. Fiber reinforcing reduces creep and shrinkage strains almost twofold. Experiments have proved that adding high-reactivity metakaolin as modifier will lead to a greater increase in flexural and compressive strength than usage of microsilica or fulleroid nanomodifier. This relation also holds for glass fiber which is not alkali-resistant. The obtained results may be used to evaluate the effect of various modifiers on the properties of glass fiber reinforced concrete.

Key words:

glass-fiber reinforced concrete, deformation shrinkage, metakaolin, microsilica, nanomodifiers