Engineering Properties of Fiber Cementitious Materials

Abstract

Fiber cementitious materials are composed of fibers, pozzolan and cementitious. Addition of fibers in cementitious materials may enhance its mechanical properties, particularly tensile strength, and ductility. This project is aimed to evaluate the mechanical properties of fiber cementitious materials which comprise fibers and silica fume in the mixes. Test variables include dosage of silica fume, mix proportions, steel fiber dosage and type. Compressive strength, direct tensile strength and splitting tensile strength of the specimen were obtained through tests. Test results indicate that the splitting tensile strength, direct tensile strength, strain capacity and ability of crack-arresting increase with increasing steel fiber and silica fume dosages. The optimum composite is the mixture with 5 % replacement silica fume and 2 % fiber volume. In addition, the nonlinear regression analysis was used to determine the best-fit relationship between mechanical properties and test parameters.

Seismic Response for a One-Third Scale-Down Vertical Cylindrical Cask Specimen Using Shaking Table Testing

“…The seismic tests of the cask were conducted for two different setups, VCC specimen and the concrete cask with an add-on shield which had a square pedestal (as VCC+AOS specimen), respectively. The dimension and weight of the VCC and VCC+AOS specimens are followed previous study [10]. In addition, the normal concrete of 280 kg/cm 2 was used in accordance with ASTM C211.1.…”