Segment of the tunnel for the refractory lining material, method of molding a segment of the tunnel for the refractory lining body and tunnel for refractory lining body

摘要

PROBLEM TO BE SOLVED: To provide a refractory material for obtaining a lining-worked structure having sufficient fire resisting performance against tunnel fire. SOLUTION: In the refractory material formed by mixing cement, water and an aggregate, =50% aggregate fine particles having air pores is contained as the volume ratio of the aggregate in the aggregate.