Full Paving of Floor Tiles in Mobile Toilets

The full paving of floor tiles in mobile toilets requires following three core steps: pre-treatment, formal paving, and finishing, along with strict control over material selection. The specific operations and precautions are as follows:

I. Pre-treatment Stage

1. Floor Cleaning: Thoroughly remove dust, debris, and oil stains from the floor to ensure a flat and crack-free base. If the floor is uneven, use cement mortar to repair it until the error is ≤3mm, preventing hollowing during subsequent paving.
2. Floor Drain Treatment: Reserve a position for the floor drain during full paving. Lay a waterproof blanket (thickness ≥2mm) around the floor drain opening and apply a waterproof coating (such as polyurethane) three times to form a closed layer, preventing water from penetrating into the structural layer.

II. Formal Paving Stage

1. Cement Mortar Layer: Mix cement mortar in a 1:3 ratio, with a thickness controlled between 30-50mm. Use a scraper to level it and let it stand for 2 hours. Begin paving after the surface has initially set.
2. Paving Operations:
   • Layout and Positioning: Pave from the toilet entrance inward. First, arrange the tiles for trial paving, adjusting the gaps (recommended 2-3mm) and color patterns to ensure overall symmetry.
   • Glue Application: Use tile-specific adhesive (such as C2TE grade) and evenly apply it to the back of the tiles and the floor. The application area should not exceed half of a single tile to prevent the adhesive from drying out.
   • Pressing and Adjustment: Press the tiles onto the floor and lightly tap them with a rubber mallet until they are flush with the surrounding tiles. Use a level gauge to check the flatness in real-time, with an error ≤1mm.
   • Paving Sequence: Follow the principle of 'from inside to outside, from top to bottom'. The corner tiles should be consistent with the overall direction to avoid sharp-angle splicing.

III. Finishing Stage

1. Cement Line Welding: After paving, fill the tile gaps with cement mortar. When it is semi-dry (about 4 hours), use a jointing tool to scrape out grooves with a depth of 1-2mm to enhance waterproofing.
2. Anti-slip Strip Installation: In slippery areas such as around the toilet and in the shower area, embed PVC or aluminum alloy anti-slip strips (width ≥50mm) with a height protruding 2-3mm above the tile surface to ensure anti-slip effects.

IV. Material Selection Points

1. Anti-slip Properties: Prioritize anti-slip tiles with a static friction coefficient ≥0.775 (such as rustic tiles or full-body tiles), avoiding smooth materials like polished tiles or vitrified tiles.
2. Ease of Cleaning: Recommend glazed tiles or anti-fouling coated tiles with a surface roughness Ra ≤3.2μm to reduce dirt adhesion.
3. Lightweight and Durability: The weight of a single tile should be ≤15kg, or choose PVC flooring (thickness 2-3mm) for easy movement and disassembly.
4. Joint Treatment: Use a joint filler (such as epoxy resin) to fill the joints, ensuring airtightness and preventing water vapor penetration that could cause hollowing.