Experimental Study On Mechanical Properties Of Alkali-resistance Glass Fiber Reinforced Concrete

With the successful utility of steel fiber reinforced concrete on slabs on ground and floorboard, more and more sight focus on alkali-resistance glass fiber reinforced concrete which has good properties on tensile, flextural and crack resistance. However, the studies on glass fiber reinforced concrete in the world are mainly concentrated on alkali-resistance glass fiber fabric reinforced concrete and shotcrete. Therefore, it is meaningful for study on alkali-resistance glass fiber reinforced concrete which used for structure like steel fiber reinforced concrete. In this thesis, based on cooperation with OCV institute in Span, experimental and theoretical analysis are used. Also, based on application and durability of aimed concrete, we design aimed concrete strength at C30 and C37 with three different alkali-resistance glass fiber, which called Anti-Crak HP67/36, fiber content inclued 10kg/m3, 15kg/m3 and 20kg/m3. Later, testing fresh concrete properties and 28 days’ curing hardend concrete and making comparison of compression strength, splitting tensile strength, modulus of elasticity and flexural tensile strength with fiber content to make sure the influences of fiber content. In additional, according to results of calculating residual flexural tensile strength and classify fiber class and design an example to seek the influences of fiber on minimum area of steel bar of steel reinforced concrete to know whether alkali-resistance glass fiber can substitute steel bar and can be used for building structure. All experiments are completed in HTWK institute in Leipzig, Germany.Rsults show that adding fiber can enhance mechanical properties of concrete. While with fiber content climbing, there is silight influence on compression strength and modulus of elasticity. In contrast, there are big influences on splitting tensile strength. The biggest influence appears on flexural tensile strength, with fiber content increase, at least 22% residual tensile strength improved. What’s more, fiber can reduce minimum area of steel bar, so it can substitute steel bar in reinforced concrete more or less.