Some common triggers of concrete flaking are related to construction defects. It may 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. chipping is a term used to describe areas of concrete that have cracked and delaminated from the substrate. There are several reasons why husking occurs, including freeze-thaw cycles, the expansive effects of the alkaline silica reaction, or exposure to fire.
However, the most common cause of chipping is corrosion of embedded steel reinforcing bars or steel sections. Corrosive steel can expand up to ten times its original volume, putting stress on the surrounding 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. And if the descaling of concrete is not controlled, structural problems tend to accelerate and spread, so they become more unstable.
So, what exactly is chipping? What are their effects and how can structures be successfully repaired and further corrosion prevented? The descaling of the concrete normally begins when the steel reinforcement embedded within the concrete member is oxidized. Before knowing the causes of concrete peeling, one should know that chipping is an alteration of the exterior of the concrete that often extends to the upper coatings of reinforcing steel. The word Desconchado comes from splinters and means flakes of the material that are destroyed from a larger solid body. In addition, delamination and descaling require greater maintenance, subsequent maintenance costs higher, and can result in decreased service life of concrete members.
Chipping can be natural and man-made; there are prevention and repair steps that must be followed. Chipping can have far-reaching consequences in terms of health and safety, structural integrity and asset value. The third ingredient, water, is sometimes added too much during the preparation of concrete, which can lead to chipping. Similarly, different atmospheric conditions such as moisture content, temperature rise and corrosion imply the formation of concrete flaking.
If a structure is allowed to deteriorate, the value of the asset will decrease and, in addition, maintenance costs will tend to increase as corrosion and scaling become more widespread. Deicing 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. Chips in concrete can be effectively avoided if concrete is handled with care and when proper techniques are used during the pouring process. Robson Forensic offers in-house experts across the country who can apply first-hand knowledge and experience around chipping issues in their specific geographic region.
The reason why some concrete structures exhibit widespread flaking, while others appear to be in good condition is due to a combination of age, maintenance, concrete quality, concrete cover depth and local environmental conditions. If left unchecked, the husking will tend to accelerate and spread, so that eventually the structure could become unstable. .