Reinforced concrete is a particular problem as the steel reinforcement corrodes with time. The primary cause here is the carbonation of the concrete, a chemical reaction in which the effect of water and air lowers the pH of the concrete to 10 or less. This loss of the protecting alkali surrounding makes reinforcement corrosion possible, causing serious damage to the reinforced concrete. If this process can be seen from cracks or spalling of the concrete, renovation is unavoidable for conserving the static load capability of the structure. In this, the steel reinforcement in the area affected is exposed so that targeted restoration of the corrosion protection can be made.
Add: Zhentou district,Liuyang city,Hunan province. China 410319