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原第二十三冶金建设公司二公司施工科迟焕珍同志在《冶建技术交流》总4期中介绍了混凝土的新搅拌法。即在不增加更多的施工设备,仅在工艺上稍加改变就能获得节省15～30%的水泥,或提高20～30%强度的一种新的混凝土搅拌法。在日本把这种混凝土叫SEC混凝土,也叫造壳混凝土。其拌制方法是先使砂子裹上一层水泥浆,然后再拌制成所需用的混凝土。日本是将含水量控制在一定值的砂子与水泥先放入搅拌机进行一次搅拌,这时就形成以砂子为核心的水泥浆壳,尔后再加入粗骨料和水拌制成需用的混凝土。另一种拌制方法是先将
The original construction of the twenty-third metallurgical construction company and the company’s construction department, Comrade Chi Huanzhen, introduced a new method of concrete mixing in the 4th phase of the “Technical Exchange for MCC”. That is, without adding more construction equipment, only a slight change in the process will result in a new concrete mixing method that can save 15 to 30% of cement, or increase strength by 20 to 30%. In Japan, this type of concrete is called SEC concrete, also known as shell concrete. The method of mixing is to first coat the sand with a layer of cement slurry and then mix it with the desired concrete. In Japan, sand and cement containing a certain amount of water content are first placed in a blender for one-time stirring. At this time, a cement shell with sand as the core is formed, and then coarse aggregate and water are added to prepare the required concrete. Another mixing method is to first