论文部分内容阅读
振捣棒是混凝土工的常备机具。使用它时应注意以下几点:1、垂直插入。插到下层未凝层50～100毫米,促使上下层结合(图1)。2、快插慢拔。快插,可防止混凝土表面振实与下面分离;慢拔是为了让混凝土填满振捣棒空洞。 3、插点间距要均匀,应是振捣棒直径的4～5倍。4、移动方式有交错式和行列式两种,常用交错式(图2、3)。5、振捣时间过长会使混凝土分离,时间短振不实。一般一个插点以振捣20～30秒为宜,振到混凝土不下沉、没有气泡和出浆为止。
The vibrator is a standing machine for concrete workers. When using it, pay attention to the following points: 1. Insert it vertically. Insert 50 to 100 mm of the unconsolidated layer underneath, promoting the combination of the upper and lower layers (Figure 1). 2, quick pull plug. The quick insertion prevents the concrete surface from separating from the lower part of the concrete; the slow pull-out is to allow the concrete to fill the vibrating rod cavity. 3, the pitch should be uniform, it should be 4 to 5 times the diameter of the vibrator rod. 4. There are two kinds of interlace and determinants in the moving mode, which are often interlaced (Fig. 2, 3). 5. Excessive vibrating time will cause the concrete to separate. The time is short and the vibration is not true. Generally, a plug-in point is suitable for vibrating for 20-30 seconds. It does not sink to the concrete, there is no bubble and slurry.