Concrete can deteriorate over time, but one of the reasons it’s such a great material is that you can have it fixed almost seamlessly. Most repair projects are simple, using some specially-mixed concrete for patches and repairs. What’s the best type of concrete mix for repairs?
What Kinds Of Concrete Are There?
Concrete is made by mixing four ingredients: portland cement, an aggregate like sand, crushed stone or gravel, and water. The cement becomes a glue that holds the sand and gravel together. The proportions of these four ingredients can change the properties of the concrete, affecting the strength, durability, workability, and resistance to heat or radiation.
Because there are many different ratios of the above ingredients, there are many kinds of concrete. Some of the more common mixes you’ll find include:
Normal-strength concrete combines the basic dry ingredients – concrete, sand and aggregate – at a 1:2:4 ratio. This mix is ideal for pavement, and because it doesn’t withstand wind stresses or vibrations, it should only be used to construct buildings that don’t need high tensile strength.
Fast-setting or quick-setting concrete is for smaller projects around the home. This concrete is ideal for supporting a fence or deck posts or creating a small concrete slab.
High-strength concrete is for projects where durability is needed. This type of concrete is made using a high cement/low water mix, making it sticky and difficult for amateurs to work. It’s an ideal mix for foundations, footers and heavy equipment bases, as it has low permeability.
What’s The Ideal Concrete Mix For Repair Work?
When you want to repair something, you should use fast-setting concrete. You can use it to fix projects ranging from concrete pavement, curbs, floors, steps, retaining walls, swimming pools, and so much more. Despite the quickness, fast-setting concrete is strong and durable, too; it can reach 4000 pounds of force per square inch (PSI) after a month. This makes the various options of this concrete mix ideal for installing patios, walkways, and a variety of indoor and outdoor projects.
For repair purposes, you’ll find that there are many premixes of fast-setting concrete. While these companies have taken care of the dry ingredients, the homeowner or concrete contractor must add the water. A little extra water increases the amount of time it takes the concrete to set.
When mixing repair concrete, our team mustn’t add too much water to the mix. When the proportions are too heavy with water, the concrete will have reduced strength and durability while being more prone to cracking and many other surface problems. We avoid using hot water in the mix, too; it will set much faster, making the concrete harder to work.