Some common triggers of concrete flaking are related to construction defects. It can be improper preparation of reinforcing steel, incompatible supporting metals, metal bars placed too close to the surface, stress fractures due to excessive weight, insufficient concrete cover or poorly poured concrete. One of the many reasons why concrete flaking occurs is due to the natural process called carbonation. Water immediately seeps into the concrete and causes other elements, especially the reinforcing bars embedded in the concrete, to corrode.
Thus, it creates bulges and cracks on the surface of the concrete. Steel reinforcing bars are often used in concrete to provide durability. In addition, poor quality steel can lead to chipping. Delamination and flaking of a concrete member are undesirable conditions; they not only represent a potential impact hazard in the scenario where chipped concrete falls and hits a person, but also reduces the cross-sectional area of the concrete member and decreases its load-bearing ability imposed.
Water seeps into the concrete and causes rebar and other elements embedded in the concrete to corrode, creating cracks and bumps on the concrete surface. The use of an appropriately qualified contractor is essential, as is diligent preparation of the substrate and the selection of a repair material compatible with the host concrete. So, what exactly is chipping? What are their effects and how can structures be successfully repaired and further corrosion prevented? And, if you have chipping, have it treated as soon as possible to maintain the structural integrity of the concrete as much as possible. For new concrete, apply a penetrating waterproofing sealant 28 days after the concrete is laid and every few years thereafter.
De-icing chemicals only aggravate already stressed concrete by allowing more water to migrate into concrete, increasing the size and depth of husking failures when freezing occurs. Concrete has tremendous versatility and is used for a variety of different projects, from superstructures to pool yards. And if the descaling of concrete is not controlled, structural problems tend to accelerate and spread, so they become more unstable. The contractor should pay special attention to the corners and edges of exposed concrete when it comes to peeling concrete.
If chipping and continuous corrosion occur without any monitoring or control, this can lead to the failure of concrete elements. An engineer must design and evaluate the construction of a particular element to ensure that quality control methods have been carried out. The concrete cover is the thickness of the concrete between the outer edge of the concrete member and the steel bar, which covers or protects the steel from exposure to external elements. Many state transportation departments recommend it to extend the life of concrete exposed to water, de-icing salts and other destructive materials.
When concrete is placed, it is required that its steel reinforcement be properly positioned within that concrete member.