Replacement of Iron Sheet on Mobile Toilet Floor
The replacement of the iron sheet on the mobile toilet floor should be carried out according to the following standardized steps to ensure structural safety and waterproof performance:
1. Removal of Old Iron Sheet and Substrate Preparation If the iron sheet is severely rusted or deformed, the old iron sheet should be removed first. Use professional tools to thoroughly remove any lifted, rusted, or loose iron sheets and residues to prevent fragments from affecting the installation of the new iron sheet. Simultaneously, clean out dust, gravel, asphalt, and other debris from the gaps to ensure the substrate is clean and free of contamination. If the structural surfaces on both sides of the gaps are uneven or damaged, repair them with cement mortar or waterproof mortar until flat. After drying, apply a substrate treatment agent to enhance the adhesion between the new iron sheet and the substrate.
2. Structural Crack Repair (if necessary) If the deformation of the iron sheet is caused by wall settlement or concrete cracking, prioritize repairing the structural cracks. Use epoxy resin grouting material to fill the cracks. Its high strength and durability can effectively prevent crack expansion and avoid further deformation of the new iron sheet due to structural issues. After grouting, wait for the material to fully cure (usually 24-48 hours) before proceeding with subsequent operations.
3. Installation and Fixing of New Iron Sheet When replacing the new iron sheet, it is recommended to use a 30cm-wide stainless steel cover plate or aluminum plate, both of which have strong corrosion resistance and a long service life. Before installation, fill the gaps with sealant to ensure there are no gaps. Fix the new cover plate to the structural layer with expansion screws, controlling the screw spacing between 30-50cm to ensure firm fixation. Reserve 5-10mm of expansion allowance on both sides of the cover plate to prevent cracking due to temperature changes or slight structural movements. Seal the joints again with sealant to prevent water leakage.
4. Waterproofing and Protective Layer Construction Fill the gaps with elastic water-repellent materials (such as asphalt hemp or foam plastic), lay reinforced polyester fabric on the surface, and apply high-elastic waterproof coating to form a composite waterproof layer, enhancing water resistance. If the floor is an epoxy floor, apply wear-resistant waterproof coating around the cover plate or paste fiberglass cloth to enhance crack resistance. Finally, restore the floor decorative layer (such as floor tiles or anti-slip flooring) to ensure overall aesthetics and practicality.
Precautions: Wear protective gloves and goggles during operation to avoid scratches or contact with chemical materials on the skin. If working at heights is involved, set up a stable scaffold and wear a safety harness. After construction, inspect all joints and fixing points to ensure there is no leakage or looseness.
