Photo: Aaron Porras

What should you not do when pouring a concrete slab?

Here are the top concrete pouring mistakes and what you can do to avoid them. Underestimating the Amount of Concrete You Need. ... Ordering the Wrong Kind of Concrete. ... Improper Installation of Concrete Forms. ... Using the Wrong Cement-to-Water Ratio. ... Waiting Too Long to Level After Pouring. ... Removing the Forms Too Soon. More items... •

dcpu1.com - 7 Most Common Concrete Mistakes

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Posted By:Dynamic Concrete Pumping , Date: Mar 8, 2020

Installing a concrete slab involves more than just pouring it out. A lot of planning and work go into the preparation, installation and aftercare for concrete. Doing it right the first time will ensure that the project is as durable as you expect and lasts a long time. Here are the top concrete pouring mistakes and what you can do to avoid them.

1. Underestimating the Amount of Concrete You Need

“Less is more” does not apply when it comes to deciding how much concrete you need for your project. Consider the use of the concrete slab. A thicker depth is necessary for applications where the concrete is load-bearing, like in foundations and driveways. This distinction will determine how much you need to order.

2. Ordering the Wrong Kind of Concrete

Not all cement is the same. Cement is composed of water, aggregate and Portland cement. There are five types of Portland cement, and you can add seven different kinds of admixtures. All these options create different mixtures, so choose the cement that’s best for your needs.

3. Improper Installation of Concrete Forms

Concrete forms allow the concrete to “form” into the right shape. They have to be installed properly to make sure the concrete does not leak, bow and move around too much during the curing process. Once you’ve installed the concrete forms, reinforce them with rebars that are 3/8 or 1/2 inch.

4. Using the Wrong Cement-to-Water Ratio

The right proportion of water and cement is key to the integrity of your concrete slab. The ratio calculates the weight of the water and the weight of the cement to create an ideal mixture. Too much water weakens the concrete, and not enough water makes the concrete difficult to pour and spread. The most common ratio is .50, but it may vary according to Uniform Building Codes.

5. Waiting Too Long to Level After Pouring

Concrete gets hard fast, so you need to be mindful of when you can level after pouring. You’ll know the concrete is ready when the water has disappeared from the surface. When the concrete reaches the top of the form, use a screed board to level it and a hand float to level particular areas.

6. Removing the Forms Too Soon

You must leave the forms in place until the concrete is dry. Removing them too soon may cause the concrete to crack, sag and collapse, which will lead to spending more resources on labor and repairs. Keep the forms around the concrete for at least two days.

7. Forgetting About Textured Finishes

If you’re pouring concrete in an area where people will be walking, remember that grooves of texture provide greater traction for a safer grip. Add texture with a concrete broom once the surface water evaporates. If you’re going to install concrete in the Alberta area, Dynamic Concrete Pumping will be happy to consult with you. Fill out our contact form to get started.

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