Research and Development of Combined Basalt Rods

Abstract

Physical and mechanical characteristics of engineering continuous basalt fiber plastics make them a promising material for various industries. Due to low weight and high corrosion resistance, these plastics provide the axis tensile strength along higher than most structural steels. However, the magnitude of the modulus of elasticity is still significantly lower. Therefore, the main research task now is an increasing the Young’s modulus of basalt fibers plastics. The objects of the study were selected experimental samples of combined basalt rods of various types with the diameter Ø8 mm, which were produced by the longitudinal and transverse winding of basalt fiber to a metal wire, combined with carbon portage and twisted in a spiral shape of individual unidirectional basalt rovings, impregnated and cured with 3-component epoxy-anhydride binder. A metal rod with a diameter of 4 mm brand BP-1 was used as the reinforcement material for basalt rod Ø8 mm, obtained by longitudinal-transverse winding. In the samples with a carbon fiber of reinforcing material was used Zoltek Carbon fiber with volume content of 25% in the composite. Experimental studies of physical-mechanical properties have shown that the 25% volume content of carbon fiber leads to the 29% increase of the limit of the tensile strength, and 90% growth of tension elasticity modulus. The ultimate strength in static bending is increased by 50%. It is revealed also that the destruction of the unidirectional composite rods is fragile with the bundle.