The process of column joint formwork and preparation for pouring is one of the important stages that requires precision and attention to detail to ensure proper execution of the work. In this article, we will discuss the procedures followed to ensure that the joint is ready to receive the pour and that all elements are perfectly secured.
Types of Rebars and Their Arrangement According to the Plan
One of the most important components used in the joint preparation process is the rebar, which comes in two main types: open rebar and rebar closed on one side. The rebars are arranged on the joint based on the specified engineering plan. Open rebar allows concrete to pass from both sides, while closed rebar is used to close the ends of the joint and distribute loads effectively. The most appropriate type is determined based on the joint design and the structural project requirements.
Checking Beam Openings and Rebar Diameters on Column Joint Formwork
After ensuring the arrangement of rebars on the column joint formwork, the next step is to check the beam openings, rebar diameters, and quantities. It is essential that the dimensions of the openings conform to the engineering plan to ensure that each part of the structure will properly receive the other parts. The diameters of the rebar used and the number of bars must also be verified to ensure the structure can bear the specified loads.
Verifying Stone Level Using a Level Device
After arranging the rebar, the next step is to verify the level of the stone on the joint. A level device is used to adjust the position of the joint and ensure that the surface is completely level. This step is fundamental to ensuring the balance and stability of the joint on site, as any deviation in the level may lead to problems in the structural stability of the building.
Verifying the Tying of Stirrups and Rebar
Another important step is to ensure that the stirrups and rebar are properly tied. Stirrups are small metal bars that help secure and distribute the main rebar within the joint. The stirrups must be tightly tied to ensure that the rebar will remain in place throughout the pouring process. Verifying these ties contributes to strengthening the joint and prevents any vibration or deviation.
Cleaning the Joint from Debris
After completing the column joint formwork and before beginning the pouring process, it is necessary to clean the joint of any dirt or debris that may be stuck on the surface. Cleaning the joint ensures that the concrete will adhere properly to the structural elements and that dirt will not affect the quality of the pour. It is preferable to use specialized cleaning tools to ensure the removal of all unwanted materials.
Pouring the Joint Using a Vibrator
Once all these procedures are verified, the joint pouring stage begins. A vibrator is used during pouring to ensure even distribution of concrete in all openings and spaces between the rebar. The pouring process must be carried out according to the technical specifications in the plans, as any error in pouring may result in voids or clumps in the concrete that affect the structural strength of the joint.
Using a Power Trowel to Finish the Pour Surface
In some cases, it may be necessary to use a power trowel to finish the pour surface after the pouring process. This step helps ensure that the final surface of the joint is smooth and well-leveled. If the joint requires a final touch, the power trowel is used to give the concrete a clean and durable appearance, which enhances the final look of the structure and increases surface strength.
Upon completion of these steps, the joint is fully ready to bear the weights and pressures it will face in the future.
