go to jove.com

HIGH SCHOOL

Engineering

Concept Videos

Civil Engineering

This is a free preview. For full access

Mixing, Placing and Curing Concrete

Concrete Surface Finishing Steps

Description

Concrete surface finishing begins right after the concrete has been placed and consolidated. The first step is screeding, which levels the surface by removing extra material until it is even with the top of the formwork. A screed is a straight edge used for this leveling step.

After screeding, a ...

Transcript

混凝土浇筑密实后,使用刮尺将表面多余的材料清除,并与模板顶部找平。

随后,使用长柄木抹子或抹平工具,将混凝土表面的高处降低,填补低洼处,并在泌水上升到表面之前将大粒径骨料嵌入混凝土中。

当表面泌水蒸发后光泽消失时,即可进行最终收面。首先进行修边,即对混凝土的边缘进行倒圆处理。

随后是接缝处理,其中控制缝、隔离缝和施工缝在结构中被有策略地设置。

接下来,使用手持式抹光机或动力抹光机去除因修边和接缝处理产生的表面缺陷,将骨料略微嵌入混凝土内部,并去除多余的水分,使表面保持开放状态。

最后,可通过镘抹使表面致密光滑,或通过刷毛处理使其粗糙防滑,或冲洗掉表面多余的水泥浆以形成裸露骨料的外观,也可通过嵌入分隔条形成图案。

Tags