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建筑业的飞速发展对结构材料的要求越来越高,高强砼因其具有高强耐久、变形小的优点,适应了现代化工程结构大跨度及重载的要求,而深受人们的青睐,近年来发展十分迅速,同时科学技术的不断进步、液压传动技术的发展及各种砼外加剂的不断问世,为泵送砼施工提供了可能。工程项目的大型化及提高施工效率亦要求采用一种高效率的现浇砼的施工方法与之相适应。国外三十年代即开始使用泵送砼方法施工,我国五十年代才开始引进砼泵及研究推广泵送砼,到七十年代上海宝钢工程才开始大规模地应用,随着
The rapid development of the construction industry is increasingly demanding for structural materials. Because of its advantages of high strength, durability, and small deformation, the high-strength concrete crucible has adapted to the requirements of the modern engineering structure span and heavy load, and has been favored by people in recent years. The rapid development, while the continuous progress of science and technology, the development of hydraulic transmission technology and the continuous development of various additives, has provided the possibility of pumping concrete. The large-scale construction of the project and improvement of construction efficiency also require the use of a highly efficient cast-in-place construction method. In the thirties abroad, pumping methods were used to start construction. In the 1950s, China began to introduce helium pumps and research and promote pumping gongs. In the 1970s, Shanghai Baosteel Engineering began to be applied on a large scale.