摘要 |
PROBLEM TO BE SOLVED: To reduce usage of a rigid polyurethane foam, without lowering thermal insulation performance of the wall surface of a low temperature storage tank.SOLUTION: A low temperature storage tank T comprises: an oil protective barrier W constructed on a basic plate B; an outer tank Ta constructed inside the oil protective barrier W; an inner tank Tb constructed inside the outer tank Ta; and a heat insulation layer C formed between the outer tank Ta and the inner tank Tb. In the insulation structure of the low temperature storage tank, the oil protective barrier W includes a residual form 2 set up on the basic plate B, and the residual form 2 is configured by an insulated precast concrete panel. The insulated precast concrete panel is formed of a concrete body containing a heat insulator 3 comprising an existing rigid polyurethane foam. |