Internal vibration is beneficial for promoting the durability of concrete structures. In general, when pouring concrete during construction, air bubbles are inevitably trapped within the material. These air bubbles will create points of weakness in the slab. Simply speaking, the density of cured concrete will be lower, and the structure will be more susceptible to cracking under pressure. Immersion vibration allows for the elimination of the bubbles to promote proper compaction. Here are four essential tips for improving consolidation in your concrete structure.
Choose Your Equipment
You should choose the best concrete vibrator for your construction work to ensure a good outcome for your project. Internal vibrators are favoured over external configurations because the design allows for penetrative compaction. You will be able to eliminate bubbles from within the material, maximising consolidation. When acquiring a vibrator, consider the size of the components. Vibrating equipment with a large head will cover a larger surface area. However, the size could be limiting when inserting between rebars. Also, think about the power supply. Fuel-powered units are more favourable than electrical machines because of the convenience and ease when moving around the construction site. Additionally, evaluate the safety and performance features incorporated into the setup.
Insert The Unit Correctly
Proper insertion of your concrete vibrator is critical for even compaction. Therefore, when working on your poured concrete, place the head within the material vertically. The inserted element should remain upright, and you should not bend it while working. If there is horizontal motion, the air bubbles are redistributed in the concrete. In addition, never force the head of the vibrator. Instead, allow natural submersion through gravity.
Merge The Poured Layers
If you are pouring multiple layers of concrete, you must ensure the entire slab is consolidated. Often, the different layers are not considered during construction, and a gap is allowed to exist between them. Consequently, the risk of structural failure will increase. If you are intending to vibrate a new layer of concrete, plan on inserting the head a little into the old section first before moving up to the fresh material. This practice eliminates the weak or cold joints formed due to discrete concrete layers.
Ensure Regular Vibration
Finally, keep your movements consistent and regular during concrete vibration. The process cannot be rushed, or the air bubbles in the material will remain trapped. Your goal should be to pull out the immersion vibrator slowly at the pace recommended by the equipment manufacturer. Then, remove the head completely once bubbles stop emerging from the poured concrete.