Waterproofing admixtures can prevent water passage and protect the structures from degradation. It increases durability & helps to reduce maintenance costs. Various admixtures are helpful for structures like walls, basements, terraces & roofs. Waterproofing Admixtures have a massive range of construction.
- Roof slabs – flat or sloping, chajjas, folded plate roofs, vaulted roofs, domes, etc.
- Flooring, external walls
- Sunk and non-sunk portions of bathrooms, toilets, balconies, etc.
- Overhead or underground water tanks and other large reservoirs
- Mortars for filling joints of C.I. or any other drainage pipes
- As a protective coating to RCC floorings, substructures against sulphate attacks
- It can be easily mixed with cement forming an impermeable co-matrix film
- Alkaline and compatible with concrete
- It does not facilitate carbonation
- It can be applied in moist and damp conditions, e.g., exteriors, and terraces in wet spells of monsoon
- It can be applied in underground and/or overhead water tanks almost immediately after emptying
- High flexural strength and extraordinary adhesion of the polymer
- It can be used as a base waterproofing coat on external walls, and after curing, it can receive SUNEXT 8
- Surface preparation of the surface to be waterproofing is very important.
- Scrub and clean the surface
- Remove laitance, dirt, paint, loose flakes, particles, foreign matter, etc.,
- For cleaning, you can use a vacuum cleaner, a high-pressure water jet, wet sandblasting, or wire brushing
- Ensure that the concrete surface possesses an open pore surface texture
- Repair any faulty concrete in the form of cracks, honeycombing, etc.
- Fill hairline cracks on plaster/mortar fill the same with POLYFILL AR as per specifications
- Remove all curing compounds and sealers
- Moisten the surface with a water jet 24 hours before applying POLYALK WP
- Mix 1 part of POLYALK WP and 1 or 1.25 parts of fresh white or grey cement
- Continuous hand-mixing to form a lump-free consistency may also be adequate
- Keep the mix continuously stirred
- Apply the slurry by brush/roller to the damp surface
- Apply two/three more coats of similar slurry at 24 hrs intervals
- Allow setting for 24-48 hours
- Cure the coating for 2-3 days by sprinkling water on the vertical surface (external walls) three times a day
- Use moist gunny bags on the horizontal surface (terraces, toilets, etc.)
- Provide a protective screed/plaster for flat surfaces on the POLYALK WP coating
- For external surfaces, provide a protective coating of SUNEXT 8
- Reservoirs and foundations
- Swimming pools
- Sewage and water treatment plants
- Secondary containment structures
- Parking structures
- Tunnels & subway systems
- Underground vaults
- Pre-cast, cast-in-place, and shotcrete applications
- Can be easily added to a ready-mix truck or at the batch plant
- Becomes an integral part of concrete
- Self-heals hairline cracks
- Reactivates in the presence of moisture, even years later
- Effective against hydrostatic pressure up to 160
- Positive and negative side waterproofing
- Simply add directly to the concrete at any time mixer during the batching process
- However, it is preferable to add SUNCRYSTALMIX to the batching water
- Mix thoroughly for 10 minutes
- Add the balance of materials by standard batching practices
To make waterproof concrete/mortar used in:
- External plastering
- Roof slabs and screeds
- Foundation walls, floors
- Terraces, bathroom walls/floors
- Tanks, reservoirs
- Water tanks, basements, swimming pools, etc
- Conforms to IS: 2645 -1975
- Reduces water permeability in concrete/mortar by up to 60%
- It improves workability & makes concrete/mortar dense and impermeable
- Minimizes porosity & capillary action
- Reduces vapor transmission through walls and slabs
- Add POLYTANCRETE IWL to gauging water of concrete mix at a rate of 200 ml per 50 kg bag of cement
- Do not add directly to the cement
Waterproofing admixtures in concrete are chemical compounds added to concrete mixtures to enhance their resistance to water and moisture penetration. These admixtures help to reduce porosity and increase the waterproofing properties of the concrete, making it more durable and suitable for use in moisture-prone environments.
To waterproof concrete, additives like crystalline admixtures, hydrophobic or water-repellent chemicals, and pore-blocking elements are commonly used. These additives work by forming a barrier within the concrete’s structure, reducing porosity and enhancing its ability to resist water penetration, thus ensuring greater durability and longevity in wet conditions.
To waterproof concrete, additives like crystalline admixtures, hydrophobic or water-repellent chemicals, and pore-blocking elements are commonly used. These additives work by forming a barrier within the concrete’s structure, reducing porosity and enhancing its ability to resist water penetration, thus ensuring greater durability and longevity in wet conditions.
The best waterproofing agent depends on the specific application and requirements. For concrete, crystalline admixtures are highly effective. Polyurethane or acrylic coatings are ideal for roofs and decks. Bituminous coatings are commonly used for foundations and below-ground waterproofing.