| 摘要 |
PURPOSE:To get a breakwater low in evaporation amount of liquefied gas and high in its durability by arranging heat insulating material made of concrete using an obsidian foaming substance as its aggregate, on the inner side face of a breakwater and on the ground surface inside the breakwater. CONSTITUTION:Heat insulating material 3 made of concrete using an obsidian foaming substance as its aggregate is arranged on the inner side face of a breakwater 2, for reserving low temperature liquefied gas and on the ground surface inside the breakwater. And since a material meeting the qualifications on initial evaporation amount less than 15.0kg/m<2>, 180sec, thermal conductivity less than 0.12Kcal/m.hr. deg.C and compressive strength of 25kgf/cm<2> or more is used for this heat insulating material, the evaporation amount of liquefied gas can be restrained to an extremely low level and the durability of the breakwater can be improved. |
