建立一个混凝土人行道系列:平滑表面
Tools, techniques, and timing make all the difference in the quality of a finished walkway
Video Transcript:
无论您是要用盖章或纹理表面完成人行道,都希望在混凝土倒入表格并平坦的情况下立即开始。
在这一集中,您将学习如何使用牛浮子以最初的表面光滑。然后,您将浏览使用镁浮子,钢制装饰垫子和边缘工具的步骤,以准备表面以添加任何饰面。
When using any type of trowel or float tool, it’s important to concentrate on keeping the leading edge tilted slight up to avoid digging into the fresh concrete. The first step is to use a bull float over the entire surface. A bull float is a large magnesium float that’s pushed and pulled over the surface using a pole that can be extended by screwing in additional sections. The purpose of the bull float is to flatten out the surface and push the small stone in the mix down. Move the handle either up or down to allow the float to skim across the surface. The magnesium bull float opens up the concrete allowing bleed water to bring up the fines of the mix, creating a creamy consistency on the top.
公牛漂浮后,表面应该看起来平坦而有光泽,也许是从浮子侧面有几条线。一个有用的提示是每次使用后立即清理混凝土工具。干燥,在混凝土上被粘在混凝土上会破坏工作表面,并且很难去除。
Depending on the mix, you may see quite a bit of bleed water coming to the surface. That’s fine, but you have to wait until that water is gone before moving on to the next step. On a hot day, it may take only five or ten minutes between steps; on cold days you may be waiting an hour or more.
一旦流血water is gone and the concrete has set enough so that your boot leaves about a ¼ inch depression when you step on the surface, it’s time to get busy. With a hand-held mag float, work the edges to drop more cream, and then follow with the edging tool. The edger rounds the sharp edge of the walkway with a radius of about ½ inch. The eased edge will create a finished look and is less prone to chipping. For best results, keep the edger flat on the surface.
在此阶段使用的最终工具是大钢抹子或垫子。使用至少有两个弯曲的角来帮助其挖掘的抹子更容易。钢抹子的目的是通过将奶油迫使奶油降低到表面来封闭混凝土。这有助于创建硬,光滑,耐用的效果。使用略微重叠的宽弧形弧线。如果有些区域似乎太干,只需用磁浮子再次击中它们即可。完成钢抹子后,您就可以打印了。