**Precautions for the Construction of Bentonite Waterproof Blankets**
When working with bentonite composite waterproof blankets (GCL), it is essential to follow strict guidelines during storage, transportation, and installation. First, GCL should be stored in a dry, shaded area, protected from moisture, rain, and direct sunlight. The material should be kept off the ground using an overhead method to prevent contact with damp surfaces. It is also recommended that any GCL delivered to the site be used on the same day to ensure optimal performance and avoid degradation due to exposure.
During construction, once a section of GCL has been installed, it must be properly protected before proceeding with the next phase or adjacent work. This helps prevent accidental damage caused by foot traffic or machinery. Workers should avoid wearing shoes with nails or high heels when walking on the GCL surface, as this can puncture or tear the material. Similarly, vehicles and heavy equipment should not be driven over the GCL to prevent compression or damage.
In projects involving GM/GCL composite liners, the GCL should be followed immediately by either the installation of an HDPE film or a 300mm thick clay protective layer. If these layers cannot be completed on the same day, the GCL must be covered to protect it from weather conditions such as rain, snow, or excessive sunlight. Prolonged exposure to water or direct sun can cause the GCL to hydrate or degrade, reducing its effectiveness.
For single-layer GCL waterproofing systems, after the installation and inspection are complete, backfilling should be done promptly using materials such as soil, sand, or gravel with a specific gravity greater than 2.0. To prevent damage to the GCL during backfilling, the material should not contain particles larger than 10mm. The backfill layer should be at least 30cm thick and compacted to a minimum of 85% density. Proper grading and compaction are essential to ensure long-term stability and waterproofing performance.
By following these precautions, you can maximize the efficiency and durability of the bentonite waterproof blanket system, ensuring it performs as intended in various construction applications. Always consult with professionals and adhere to local building codes and manufacturer recommendations for best results.
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