Mechanical Properties Test And Geotechnical Anchoring Applications Of Basalt Fiber Reinforced Plastics

The Advantages of basalt fiber composite material (BFRP) is high tensile strength, high corrosion resistance and chemical stability, heat stability and high insulation, and low cost of basalt. At the same time, the thermal expansion coefficient of basalt fiber reinforced concrete is similar to that of concrete, which ensures the synchronous deformation of concrete and steel bar; In geotechnical slope engineering, anchor rod (rope) is commonly used for supporting. Conventional bolt (cable) in the presence of corrosion problems, If you can put forward reasonable theory support and the design scheme, Using BFRP bolt (cable) partial or full replacement of reinforced bars (cables), Will have a wide range of engineering applications.The mechanical properties of BFRP bar indicator is one of the important parameters of BFRP anchor application design In this paper, the ultimate tensile strength of basalt fiber reinforced composite bars with different diameter is about 900MPa～1100MPa, The elastic modulus is about 46.3GPa-54.3GPa, Shear strength is about 159～189MPa, Corrosion resistance and other mechanical properties.The bonding performance between BFRP bar and cement base class, is the foundation of BFRP steel anchor design and construction. In this paper, the tensile test of BFRP steel bar is carried out by means of drawing test, The bond behavior between BFRP steel and cement base is studied. Discusses the different types of cement base class and the bonding performance between BFRP reinforcement material. According to the test results, the bond strength of the basalt fiber composite material and the cement base class is proposed to approximately 2MPa-4MPa.In this paper, the design and application of BFRP steel anchor rod (rope) conducts a preliminary study. At the same time in the soil slope and rock slope under the two kinds of slope anchoring system, Compared with traditional bolt (cable). Field test shows that the alternative design through equal strength, The effect of anchoring effect of BFRP reinforced bar (cable) slope is similar to the traditional bolt (anchor) anchor bolt. Based on the field test, the construction technology of BFRP reinforced bar (cable) is summarized, and the effect of BFRP bar (cable) anchorage is verified. BFRP steel bar as anchor (cable), can refer to the traditional anchor design specification design.BFRP bar material with high tensile strength, acid and alkali resistant, Cement and concrete performance is good, is a new kind of geotechnical reinforcement materials, have good application prospects. Recommended in the geotechnical engineering to promote the use, to further verify the BFRP rebar anchor (cable) long-term performance.