As you pour concrete in do-it-yourself projects, air bubbles develop and remain trapped within the concrete mixture. The bubbles form honeycomb-like spaces and cavities between the cement particles as the concrete starts to cure. If you leave them unattended, these cavities affect the structural integrity of your cement slabs. They will not last as long as they should. Thankfully, pneumatic shaft vibrators can help you remove these air bubbles and prevent the cavities from cropping up when the slab cures.