Company Details
January 06, 2023
Prestressed Concrete is simply concrete that is stressed before concrete is poured in from work with the help of a jack and tension embed in it.
In the case of prestressed concrete, high-strength prestressed steel bars produce tension in a concrete member before actual loads are applied which will be balanced by the tensile stresses imposed on the member during the service period or after commissioning. As we generally know that concrete is the mixture of three main ingredients which are cement (a fine mixture of clay, limestone, and a small amount of gypsum ground up to the desired degree of fineness), sand (only river sand or obtained through pit) and aggregate (Made form blasting and grinding from rocky soil) and when we add water (free from impurities) in this mixture it creates concrete which we use for various civil work.
One of the main important characteristics of concrete or drawback of concrete is, that it is weak in tension and strong in compression because the material used in concrete is rigid and posse’s low tensile/flexural strength.
Under such a circumstance we have to adopt different kinds of methods and one of the most commonly adopted methods is the prestressing of concrete
Conventional concrete has embedded with high tensile strength steel bars which have great compressive strength to form ideal structural material which is good in both compression and tensile. In the case of prestressed concrete, high-strength prestressed steel bars produce tension in a concrete member before actual loads are applied which will be balanced by the tensile stresses imposed on the member during the service period or after commissioning. As you can see in fig. 1 which is a normal R.C.C beam where no prestressing is done beam will deflect under loading and the crack will develop. In the pre-tensioning process, the steel tendon is stretched before the concrete is poured into the formwork. Then High–strength Steel Tendons are placed between two abutments and stretched as per the required deflection or strength. After that Concrete is poured into molds and around the tendons and allowed to cure. Tendons are kept stretched until the desired concrete strength is reached after curing. As the steel reacts to regain its original length, the tensile stresses are translated into compressive stress in the concrete. Prestressed Concrete Structures
The most popular prestressed concrete elements are roof slabs, piles, poles, bridge girders, wall panels, and railroad ties.
Advantages and Disadvantages of Prestressed Concrete
Advantages of Prestressed Concrete
Disadvantages of Prestressed Concrete
The above is the What Is Prestressed Concrete | Advantages and Disadvantages of Prestressed Concrete we have listed for you. You can submit the following form to obtain more industry information we provide for you.
You can visit our website or contact us, and we will provide the latest consultation and solutions
Send Inquiry
Most Popular
lastest New
Send Inquiry