Concrete Driveway Process
The first steps in preparing the subgrade are critical if you want your concrete driveway to last for several years. First, your subgrade should be compacted evenly through out. 4 inches of base gravel is the least that should be used and it should pack well. A tamper is highly recommended to guarantee best results and is frequently used amongst concrete professionals.
Take note that ground soaked with water needs to be properly removed prior to concrete being poured. If you have a downspout draining in a certain area, ensure you get down far enough to remove the moisture before pouring.
You must ensure that a minimum 4” of concrete is being poured whether you’re pouring your concrete driveway yourself or you’re hiring a professional contractor. Concrete is measured by its strength capacity. Pounds per square inch, or MPa (megapascals) is the metric measurement for psi. Your driveway must be poured with a 32 MPa duramix concrete (a specific mix from any redimix concrete supplier). There are economical mixes so be certain this is what is being used for your project.
Correctly Placed Joints
Joints are placed in concrete to encourage cracking to occur inside the cut (in a straight line). It’s a common misconception that joints prevent cracking.
It’s suggested from our concrete professionals in Victoria to make sure there are angled cuts of 90 degree corners as consensus. Cut lines can still look great as they can be incorporated into patterns and designs. They are essential components of the construction of your driveway. Joints must be at least ¼ of the concrete’s thickness. A 1” deep joint should be created in the concrete in a 4” thick driveway. There is also proper spacing required for the joint placement. On a 4” thick driveway, joints must be spaced no farther than 8’-12’ apart.
When the concrete is wet, some concrete contractors put in control joints with a groover, and others cut them in with a concrete saw the next day. Both have their pros and cons but be sure to ask your contractor what they do and ask them why.
Concrete cracks, and it just naturally happens! At Atlantis, we do everything in our control to prevent cracking. If you see some cracks in your driveway, don’t panic. It’s normal. Although on that note, you should inquire if there seems to be extreme cracking or if the cracking appears to be spreading.