Because of the nature of concrete, it is not a homogeneous material. It has many different components that can be damaged by temperature changes or moisture content variations. The result is cracking on the pavement surface. Concrete crack widths are usually less than 1/8 inch. Depending on how much water was used during construction, they may vary from as little as 0.25 inches up to 3 inches. Cracks will appear when there is an increase in pressure inside the slab due to expansion caused by heat or humidity change. This causes stress concentration at the edges of the joints between slabs. When this happens, the load-bearing capacity of the joint decreases, causing more damage to the surrounding area.
Why we add intentional concrete cracks to sidewalks?
We use these cracks for two purposes: To allow air circulation through the cracked areas and provide drainage channels for rainwater runoff. We also believe that they improve aesthetics.
Why do concrete sidewalks cracks?
Concrete sidewalk cracks occur because of the way concrete is made. As mentioned above, concrete contains several ingredients, including cement paste, sand, aggregate, and water. During mixing, all of these materials must come together with enough force so that the mixture becomes strong and solid. However, if too much water is added, then the mix will become weak and unable to hold its shape. If the amount of water is correct, but the strength of the mix is low, then the resulting product will be very hard and brittle. In either case, the finished product will contain void spaces where the water could escape. These void spaces cause the concrete to expand and contract over time. Over time, the contraction creates stresses within the concrete, leading to cracks forming in the concrete.
How to repair concrete sidewalk cracks?
There are different methods you can employ to repair concrete sidewalk cracks.
1. Slabjacking repair
This method involves filling the cracks with a special type of mortar called “slabjacking.” A thin layer of mortar is applied directly into the cracks using a trowel. Once dry, another coat of mortar is spread across the top of the first one. After drying again, a third coat is placed on top of the second. Finally, after allowing the final coat to set, the entire job should look like new.
2. Demo and Replace
If your concrete sidewalk cracks are large, deep, or extensive, then replacing the existing concrete might be necessary. You would need to remove the old concrete and install fresh concrete. Various types of replacement products are available today, such as precast panels, stamped concrete, poured-in-place concrete, etc. Each option offers advantages and disadvantages. For example, some options require additional labor costs while others save money. Some options offer better durability, while other options cost more. Your local contractor can help guide you towards making the best decision based on your needs.
3. Epoxy Repair
Epoxies are often recommended for small cracks. Epoxies are typically mixed in a bucket and sprayed onto the crack. Once cured, epoxies tend to last longer than traditional mortars. Although epoxies are effective, they cannot withstand extreme temperatures. Therefore, they are only suitable for repairing cracks located near exterior walls.
The most important thing when it comes to fixing concrete sidewalk cracks is hiring the right concrete contractor. The best company will properly fix any problem without causing further damage, and this is where Visalia concrete Company comes into play. They provide regular maintenance services to ensure that there are no future problems. This means that their workmanship lasts long term. It’s always good to ask friends and family members who’ve had similar jobs done before. Also, check online reviews from previous customers. For more information about concrete repair, reach us via matth127.sg-host.com or (559) 214-2588.