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Chapter 4 - Producing Silica-Fume Concrete
Finishing Flatwork

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Slide
The one-pass technique simply means that all of the steps in finishing are completed in sequence without any waiting for the concrete to reach enough strength to support the weight of finishers. This means that the traditional waiting period of several hours between initial screeding and bull floating and applying the final surface texture is eliminated. As soon as the concrete is placed, it is screeded, bull floated, textured, and then protected until curing begins (curing is discussed later in detail.) When done properly, this process saves time and cost because the finishing crew does not have to wait on the concrete to set to apply the final finish.

Protect refers to the continuing requirement during placing and finishing to protect the silica-fume concrete from drying and plastic shrinkage cracking (also discussed later in detail.)