What is Cementitious waterproofing? Explain in details with application procedure and typical use.

Cementitious waterproofing involves the use of a waterproofing material that is based on Portland cement. The cement is mixed with other ingredients, such as sand, water, and waterproofing admixtures, to create a slurry that can be applied to concrete surfaces to create a barrier against water intrusion.

The application procedure for cementitious waterproofing typically involves the following steps:

1. Surface preparation: The surface to be waterproofed must be clean, dry, and free of any contaminants that could affect the adhesion of the cementitious slurry.
2. Mixing of the cementitious slurry: The ingredients are mixed together, following the manufacturer’s instructions, to form a slurry that can be applied to the surface.
3. Application of the cementitious slurry: The cementitious slurry is applied to the surface, typically using a trowel or roller, and is worked into the surface to ensure complete coverage.
4. Curing: The cementitious slurry must be allowed to cure and dry completely, which typically takes several hours to a few days.

Typical uses of cementitious waterproofing include:

1. Foundation waterproofing: Cementitious waterproofing can be used to waterproof basement walls and foundations, creating a barrier against water intrusion.
2. Waterproofing of underground structures: Cementitious waterproofing can be used to waterproof underground structures such as parking garages, tunnels, and retaining walls.
3. Repair of leaks: Cementitious waterproofing can be used to repair leaks in concrete structures, sealing the cracks and joints that are causing the leaks.

Cementitious waterproofing offers a number of benefits, including ease of application, durability, and the ability to provide a continuous, watertight barrier. However, care must be taken during the application process to ensure that the cementitious slurry is applied evenly and in sufficient quantity to provide a continuous, watertight seal. Additionally, the curing process is critical to the success of the waterproofing, and the surface must be protected from moisture during the curing period.