一、前言为了使在模板上升时其下端脱模的混凝土具有相同的强度,应使浇灌混凝土的上皮保持同等高度。换句话说,应使混凝土在模板内部通过韵时间相等。在混凝土泵车的使用未普及前,用滑动模板施工筒仓或其他构筑物时,都是使用混凝土提升机。也就是将搅拌机搅拌好的混凝土装入大料斗或提升用料斗,通过提升机送 I. INTRODUCTION In order to make concrete with the same strength at the bottom of the template when it is lifted off, the skin of the poured concrete should be kept at the same height. In other words, the concrete should be made to have equal rhythm within the template. Before the use of concrete pump trucks is popularized, concrete elevators are used when constructing silos or other structures with sliding formwork. That is, the concrete mixed by the mixer is loaded into a large hopper or a lifting hopper, and is conveyed through the elevator.