The Experimental Research on the Impermeability of Reinforced Concrete Used to the Nuclear Waste Container

To ensure the durability of material for storing nuclear waste, tests of the compressive strength, slump constant and impermeability of hybrid fiber concrete are carried out after being heated to 150degC. By the gradation analysis, the effects of the steel fiber (A , B), polypropylene fiber (C) and fly ash (D) on properties of concrete had been qualified; then postponing the time for roasting, the impermeability of the specimens whose mixed proportion was adjusted by the method of steepest ascent and steel fiber reinforced concrete and high strength concrete are tested. By the research above, it is concluded that: the effect of ingredients on impermeability of hybrid fiber concrete after being heated is: A>C>D>B; the impermeability of fiber concrete and high strength concrete would degrade obviously as the time of roasting was postponed; the impermeability of steel fiber concrete SP-10 is better than high strength concrete SP-13 when the time of roasting is longer than 17 days; the hybrid steel fiber A and B concrete is fit for the nuclear waste container.