House Prefabricated Slab Repair Plan
The repair plan for house prefabricated slabs should be selected based on specific issues. Common repair methods are as follows:
I. Reinforcement for Fractured Prefabricated Slabs
Fractures in prefabricated slabs are serious structural issues that require professional reinforcement methods. Section enlargement reinforcement involves pouring concrete at the fracture site to increase the cross-sectional area and enhance load-bearing capacity, suitable for cases with small fracture ranges but requiring restoration of structural integrity. Carbon fiber sheet bonding reinforcement utilizes the composite action of high-strength carbon fiber sheets and structural adhesive to enhance the tensile strength of the fracture site, featuring convenient construction and minimal damage to the original structure. Structural load path modification reinforcement reduces the load on the fracture site by adding supports or adjusting the load transfer path, suitable for severe fractures requiring long-term reinforcement.
II. Wall Crack Repair
The repair method for wall cracks should be selected based on the severity of the cracks. Grouting repair is suitable for narrow cracks, filling the cracks with materials such as epoxy resin injected under high pressure to restore the overall integrity of the wall. Steel plate reinforcement involves bonding steel plates on both sides of severe cracks and fixing them with bolts to enhance the wall's crack resistance. If cracks appear on the ceiling, the gypsum board ceiling leveling method can be used, directly laying gypsum board on the ceiling and applying putty, although this reduces the room height by more than 5 centimeters and incurs higher costs. Enhanced painting technique involves sticking joint tape at the seams, laying a 10-centimeter-wide mesh fabric, and covering it with a second layer of mesh fabric to effectively reduce the risk of cracking, with minimal impact on height and cost, suitable for preventive treatment of minor cracks.
III. Roof Leakage Repair
Roof leakage requires priority repair of the waterproof layer. Complete waterproof layer replacement is a thorough solution that involves removing the original waterproof material and laying new waterproof membranes or applying waterproof coatings, ensuring the base layer is dry and level. Membrane hot-melt and acrylic ester auxiliary technology combines the durability of the membrane with the sealing properties of the auxiliary material: the membrane is applied using hot-melt construction to form a full bond with the base layer; acrylic ester auxiliary material is used for node treatment (such as drainage outlets, internal and external corners) and sealing at membrane overlaps, compensating for the membrane's insufficient sealing in complex areas and extending the service life of the waterproof layer.
When repairing, it is necessary to evaluate the feasibility of the plan based on the on-site situation, prioritize measures with minimal impact on the structure and reasonable costs, and ensure that construction complies with building code requirements.
