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一、前言 1973年日本从美国引进连续搅拌式搅拌机,1974年及1977年日本建设机械化研究所对连续式搅拌机的性能进行了试验。近年来,以日本西部为中心广泛使用了连续搅拌机,使用台数已达130台。有的用于固定式搅拌楼,有的安装在搅拌船上进行海洋工程,还有用于预拌混凝土工厂向远距离山区输送混凝土,在隧道工程中作为喷射混凝土使用,在新奥法中使用等情况。尤其是对各种混凝土修补工程中使用的超早期强化混凝土,采用连续搅拌机效果更为良好。由于连续搅拌机的实际使用的增加及日本土木学会混凝土运营小委员会第3分科会关于连续搅拌机的性能调查结果,1979年11月日本土木学会在混凝土标准规范书修改时加
I. INTRODUCTION In 1973 Japan introduced continuous stirrer mixers from the United States. In 1974 and 1977, the Japan Institute of Construction Mechanization conducted tests on the performance of continuous mixers. In recent years, continuous mixers have been widely used in western Japan, and the number of stations has reached 130. Some are used for fixed mixing buildings, some are installed on a mixing vessel for ocean engineering, and are used for the ready-mixed concrete factory to transport concrete to long-distance mountainous areas, used as shotcrete in tunnel construction, and used in the new Austrian method. . Especially for ultra-early reinforced concrete used in various concrete repair projects, continuous mixers are more effective. Due to the increase in the actual use of continuous mixers and the results of the investigation of the performance of continuous mixers by the Subcommittee 3 of the Japan Society of Civil Engineers’ Concrete Operation Subcommittee, the Japanese Society of Civil Engineers revised the concrete specifications book in November 1979.