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日本从明治年代就开始使用轻混凝土。明治到1945年期间,对炉渣混凝土、碎砖混凝土、大岛卵石(轻骨料)混凝土等进行了研究。这一时期为第一时期。1945～1960年,为轻骨料混凝土使用的第二时期。这时用火山渣为轻骨料制造轻质钢筋混凝土,并制定了轻骨料规程 JIS,对轻骨料的原料、骨料级配、配合比及性能、设计、施工和实际操作等都
Japan started using light concrete since the Meiji era. From Meiji to 1945, research was conducted on slag concrete, broken brick concrete, and large island pebble (light aggregate) concrete. This period is the first period. From 1945 to 1960, it was the second period for the use of lightweight aggregate concrete. At this time, light-weight reinforced concrete was made from the light residue of volcanic slag, and the light aggregate specification JIS was formulated. The raw materials, aggregate gradation, mix ratio and performance, design, construction, and practical operation of light aggregate were all