In terms of the construction world and concrete supplies, we know reinforced concrete. Some of these types of concrete use reinforced concrete or prestressed concrete which uses steel for its structure. Although the implementation of the construction process has been carried out as well as possible, sometimes small or even large damage can occur. Often, the damage that occurs to reinforced concrete cannot be avoided due to many factors, such as natural factors that cannot be prevented or chemical factors. In more detail, the following will discuss some of the causes of damage and also how to overcome them:
In general, the damage that occurs is divided into several categories.
– Cracks in concrete are often found in the form of long narrow lines. These cracks usually occur due to hot and windy weather. This type of damage is superficial and interconnected. Damage due to natural conditions in concrete with steel structure (reinforced concrete) or prestressed concrete is often unavoidable. With proper handling, this damage will not cause significant problems for construction.
– Holes in reinforced concrete (voids). Voids is a term to describe the condition of damage to reinforced concrete, in the form of holes that are relatively deep and wide. The reason is that the compaction process carried out with a concrete vibrator is not optimal and the distance between the formwork and the reinforcement or frame is too narrow. What often happens is that the distance between the bones is too narrow so that the mortar cannot fill the cavities or pores between the coarse aggregates perfectly.
– Shallow peeling on the surface (scaling/ erosion/spalling). Shallow peeling of reinforced concrete surfaces is a common type of damage. The cause is the repeated exposure to the freezing and thawing process so that the surface of the concrete can be peeled off (scaling). Other types of damage cause the surface of the concrete to peel off, namely spalling, which is the attachment of material to the surface of the formwork which causes the surface of the concrete to peel off.