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砼二次投料搅拌工艺目前主要有水泥裹砂法、水泥裹石法、净浆裹石法、净浆裹砂石法等几种,这几种工艺可在一定程度上提高砼强度、改善砼性能,并可节约水泥。与常规搅拌工艺相比,二次投料搅拌工艺只需改变一下投料顺序,操作仍很简便,也不需增加任何设备,因此在实际中推广应用有着重大的现实意义。我公司从1985年5月开始,选取二次投料搅拌工艺中较适合于现场搅拌的裹砂石法,直接在施工现场进行试
The secondary feeding and stirring process currently includes cement sand-binding method, cement-enveloping method, paste-wrapping method, and grout-wrapped sand method. These techniques can improve the strength of concrete and improve the quality of concrete. Performance, and can save cement. Compared with the conventional stirring process, the secondary feeding and stirring process only needs to change the feeding sequence, the operation is still very simple, and there is no need to add any equipment. Therefore, it is of great practical significance to promote the application in practice. Since May 1985, our company has selected a sand-binding method that is more suitable for on-site mixing in the second-input material mixing process and will directly test it at the construction site.