| dc.description.abstract | The low-radioactive waste container concrete is different from the general concrete and must be considered for a longer period of durability.
This research continues the previous research team using reactive powder concrete to make low-level radioactive waste containers with mixing parameters, vibrating for 60 seconds to make specimens, and curing with hot water at 90℃ for one day. To improve the engineering properties and container quality of the reactive powder concrete used in the container, the parameters of the silica sand content and the steel fiber content are first adjusted, and the optimal addition amount of the parameters is determined, then the water-binder ratio is reduced, and the hardness tests such as compressive strength, elastic modulus, bending strength, direct tension, splitting strength, and impact resistance, as well as durability tests such as porosity, surface resistivity, ultrasonic pulse velocity, and drying shrinkage. The test results show that the silica sand and steel fiber content performed better at 1.2 and 2.0%, respectively, and the water-to-binder ratio was reduced to 0.18 to achieve the optimal ratio, showing the potential of the reactive powder concrete ratio to be used in high-integrity containers.
Ultrasonic pulse velocity test is used for durability quality inspection. To provide subsequent container inspection, it is highly correlated with surface resistivity and porosity in regression analysis, showing that ultrasonic pulse velocity can be used as a future container inspection as one of the methods. Regression analysis of both the direct tensile strength and the flexural strength and the splitting strength also shows a high correlation., so the splitting test can be used to evaluate the crack resistance of reactive powder concrete. | en_US |