Customized steel formwork manufacturers: How to avoid leakage of grout at the joints of the formwork?

Leakage of grout in formwork joints can reduce the quality of concrete structures, affect structural strength and durability. The following are specific methods to avoid leakage of grout in formwork joints:
Template design and production
Optimize template design: minimize the number of joints and replace scattered small templates with integral steel templates. When designing, large-sized templates can be used to reduce the number of splices and thus lower the risk of grout leakage. At the same time, for the design of seams, better sealing methods such as tongue and groove splicing can be used.
Improve production accuracy: Ensure high precision in template production, smooth surface, and no obvious unevenness. When making, the size of the template should be accurate, and the joints should be smooth and flat, without any gaps, burrs, or missing corners, to ensure tight splicing.
Template installation aspect
Cleaning and repairing templates: Prior to installation, the joints of the templates should be pre treated. Thoroughly remove dust, oil stains, dirt, and other debris from the joints to ensure a clean surface of the template. At the same time, trim the template at the joint to make its edges smooth and even.
Use sealing materials: Use specialized sealing tape, rubber sealing strips, or sealing gaskets at the joints of the template to enhance the sealing of the joints. For areas where sealing strips or tapes cannot be used, sealant can be injected to fill the gaps between the templates.
Reasonable setting of tie rods and reinforcement: After positioning the template, the tightness of the tie rods around should be consistent to ensure that the template is installed firmly. When reinforcing, it is necessary to ensure that the formwork support system has sufficient strength and stability to withstand the lateral pressure during the concrete pouring process, and prevent formwork deformation from causing joint leakage.
Concrete pouring aspect
Control pouring speed and vibration: Control the pouring speed of concrete to ensure uniform flow of slurry and avoid situations where it is too fast or too slow. During the pouring process, appropriate vibration equipment should be used for vibration to fully fill the gaps between the formwork, but it is also necessary to avoid excessive vibration time or contact between the vibration rod and the formwork, which may cause deformation of the formwork or loosening of the joints.
Adjust the concrete mix ratio: moderately increase the powder content and improve the viscosity of the concrete without affecting the quality of the concrete; At the same time, control the water cement ratio well to avoid excessive dilution of concrete slurry caused by excessively high water cement ratio. An appropriate amount of flow agent can also be added to improve the flowability of concrete, which helps to fill the gaps in the formwork and reduce the occurrence of grout leakage.
Template maintenance and inspection aspects
Timely cleaning and repair: During the construction process, residual concrete and other impurities on the surface of the formwork should be promptly cleaned, especially at the joints, to prevent the residue from affecting the sealing of the formwork. Repair the damages generated during the construction process, such as using professional repair materials for minor damages, and replacing relevant components in a timely manner for severe damages.
Regular inspection and maintenance: After each shift of construction is completed, a comprehensive inspection of the formwork is carried out, with a focus on checking the sealing of the joints and the fastening of the connectors. Regularly maintain the template, including rust removal, repainting, reinforcement, etc., to ensure that the template is always in good working condition.