All you need to know about prestressed concrete
The construction industry has got a boon in the form of prestressed concrete. It is getting the exposure and fame for quite some time now, but its widespread benefits and advantages are not known to many. There are many questions in the mind of even the experts in the field of construction. This is why we thought of putting together all the important information related to prestressed concrete in this blog article today.
Check if these questions ever crossed your mind!
- Is there a specific method of controlling the camber of prestressed concrete element under a specific prestressing force?
The most common and widely used method to control the camber of prestressed concrete element is using haunch with variable pedestals to overcome the unnecessary camber. This should be bore in mind that this method also has some restrictions that must be considered.
- How does prestressed concrete differ from reinforced concrete?
Prestressed concrete is also a type of reinforced concrete. Prestressed concrete is actually a compound of high-resistance steel and concrete. The stress has a counter-impact and the opposite of the stresses resulting from the loads affecting the structural element ultimately increases its capability to endure all types of loads affecting it. While reinforcement steel bars embedded in the concrete bear the tensile loads in reinforced concrete, the responsibility to bear the loads lies on the pre stressed cables or tendons encased within the concrete.
- What are the types of prestressing?
Prestressing is of basically two types – Pre-tensioning and Post-tensioning.
Pre-tensioning: Here, the tendons are tensioned against some abutments before the concrete is placed. The tension force is released after the hardening of concrete. The tendon tries to attain its initial length, which the concrete doesn’t allow because of the bond between them. In this way, a compression force is induced within the concrete.
Post-tensioning: In this method, metal or plastic ducts are placed inside the concrete before casting. The tendons are placed after the hardening of the concrete. The tendons are placed inside the ducts, stressed and hardened after the concrete hardens and attains enough strength.
- What are the applications of prestressed concrete?
Prestressing concrete can be used in the construction of bridges, RCC roads, precast electrical poles, railway concrete sleepers, etc.
- What are the advantages of prestressed concrete?
Prestressed concrete members have numerous advantages that include high durability, easy transportation because of smaller size of the sections, and their ability to do away with cracks.
Do you have any question regarding prestressed concrete that you would want to ask us? Do let us know and our experts would be happy to help.