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近几年来,国内外混凝土工程界都在致力于混凝土搅拌新工艺的研究与开发,且已取得了显著的效果。比如,七十年代末由日本首先研究和开发的水泥裹砂法,预拌水泥净浆法及预拌水泥砂浆法;丹麦所采用的水泥净浆法;我国的二次投料法,改进裹砂法及净浆裹石法等等。这些混凝土新工艺,同我国长期沿用的工艺相比,均能显著地提高混凝土的强度,改善混凝土的性能。但是,这些新工艺的开
In recent years, the concrete engineering circles at home and abroad have been devoted to the research and development of new concrete mixing processes, and have achieved remarkable results. For example, at the end of the 1970s, cement sand-coating method was first researched and developed in Japan, ready-mixed cement paste method and ready-mixed cement mortar method; cement paste method used in Denmark; secondary feed method in China, improved sand-enveloping method Law and paste and so on. These new concrete technologies can significantly increase the strength of concrete and improve the performance of concrete compared with the long-term technologies used in China. However, the opening of these new processes