自日本造壳混凝土在国内介绍后,得到我国许多科研、生产部门的重视,据不完全统计,目前国内已有20余个单位在研究、试用造壳混凝土,并已取得了可喜的效果。我国现有四种分段投料搅拌法生产造壳混凝土,现分别介绍如下:1.先拌水泥净浆法:先在自落式搅拌机中搅拦水泥净浆0.5～2分钟,然后加入砂石搅拌0.5～1.5分钟,可提高 Since Japan made shell concrete introduced in the country, our country has received many scientific research, production department attention, according to incomplete statistics, at present there are more than 20 units in the study, trial build of concrete, and has achieved gratifying results. China’s existing four kinds of sub-feeding method of mixing production of shell-making concrete, are introduced as follows: 1 first mixing cement paste method: First in the self-stirring mixer cement slurry blocking 0.5 to 2 minutes, and then add sand Stir 0.5 to 1.5 minutes, can be increased