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1. Cementitious Waterproofing
Cementitious waterproofing is the easiest method of waterproofing in construction. The materials for cementitious waterproofing are readily available from suppliers of masonry products. And they are easy to mix and applyThe Constructor
Waterproofing in Buildings [PDF]: Types, Methods, and Applications
Manikandan
7 years ago

Waterproofing is the formation of an impervious barrier over surfaces of foundations, roofs, walls, and other structural members. The function of the impermeable barrier is to prevent water penetrations. The building surfaces are made water-resistant and sometimes waterproof.

The utilization of liquid waterproofing membrane, cementitious materials, polyurethane liquid membrane, and bituminous material are common in the waterproofing of buildings.

Waterproofing is necessary for the basement, walls, bathrooms, kitchen, balconies, decks, terrace or roofs, green roofs, water tanks, and swimming pools, etc.

Contents:

Waterproofing Methods
1. Cementitious Waterproofing
Applications of Cementitious Waterproofing
2. Liquid Waterproofing Membrane
3. Bituminous Coating Waterproofing
4. Bituminous Membrane Waterproofing
5. Polyurethane Liquid Membrane Waterproofing
FAQs on waterproofing types, methods, and applications
Waterproofing Methods
Cementitious Waterproofing
Liquid Waterproofing Membrane
Bituminous Membrane
Bituminous Coating
Polyurethane Liquid Membrane
1. Cementitious Waterproofing
Cementitious waterproofing is the easiest method of waterproofing in construction. The materials for cementitious waterproofing are readily available from suppliers of masonry products. And they are easy to mix and apply.

The applications of the cementitious waterproofing technique are in the internal wet areas, such as toilets. That is why it does not go through the contract and expansion process.

Cementitious Waterproofing Method
Fig. 1: Cementitious Waterproofing
Applications of Cementitious Waterproofing
Water treatment plants
Sewage treatment facilities
Bridges
Dams
Railway and subway systems
Marine cargo ports and docks
River locks/channels
Parking structures
Tunnels
2. Liquid Waterproofing Membrane
The liquid membrane consists of a primer coat and two topcoats. The application of the coatings is by spray, roller, or trowel. The liquid layer is thin and offers more flexibility than the cementitious types of waterproofing.

The liquid cures into a rubbery coating on the wall. The elongation properties of the coat can reach as high as 280%. The durability of the waterproofing coating depends on what type of polymer the manufacturer used for the making of the liquid waterproofing.

Liquid Waterproofing Membrane Method
Fig. 2: Liquid Waterproofing Membrane
Liquid waterproofing membrane can be of a spray-applied liquid layer composed of polymer-modified asphalt. Polyurethane liquid membranes in separate grades for trowel, roller, or spray are also available from various manufacturers.

3. Bituminous Coating Waterproofing

Bituminous coating (asphalt coating) is made of bitumen based materials. It is a flexible protective coat based on its formulation and polymerization grade. The flexibility and protection against water can be influenced by the polymer grade and reinforcement of fiber.

The most common applications of bituminous coatings include areas that are beneath screed wet. It is an excellent protective coating and waterproofing agent, especially on surfaces such as concrete foundations.

It is not suitable for exposure to sunlight unless it is modified with a more flexible material such as polyurethane or acrylic-based polymers.

Fig. 3: Bituminous Waterproof Coating
4. Bituminous Membrane Waterproofing
Bituminous membrane waterproofing is a popular method used for low-sloped roofs due to their proven performance. The bituminous waterproofing membrane has a torch on the layer and self-adhesive membrane.

Self-adhesive compounds comprise asphalt, polymers, and filler; additionally, certain resins and oils may be added to improve adhesion characteristics. The self-adhesive type has a low shelf life as bonding properties of the membrane reduces with time.

Torch on membrane has exposed and covered types. The exposed layer often has granular mineral aggregate to withstand the wear and tear of the weathering. For the other kind of membrane, the contractor needs to apply one protective screed to prevent the puncture of the membrane.

Bituminous Membrane Waterproofing Method
Fig. 4: Bituminous Membrane Waterproofing
5. Polyurethane Liquid Membrane Waterproofing
Polyurethane liquid membrane method of waterproofing is used for the flat roof area and exposed to weathering. This waterproofing method is expensive.

Polyurethane Liquid Membrane Waterproofing Method
Fig. 5: Polyurethane Liquid Membrane Waterproofing
Polyurethane Liquid Membrane can offer higher flexibility. Polyurethane is very sensitive to moisture content. Therefore before application, one has to be very careful evaluating the moisture content of the concrete slab, otherwise peeling or de-bonding of membranes may happen after some time.

FAQs on waterproofing types, methods, and applications
?What are the types of waterproofing?

The most common types of waterproofing are cementitious waterproofing, liquid waterproofing membrane, bituminous membrane, bituminous coating, and polyurethane liquid membrane.

?What is the purpose of waterproofing?
The purpose of the waterproofing is to prevent water penetrations into concrete surfaces.

?Where is waterproofing used?
Waterproofing is necessary for the basement, walls, bathrooms, kitchen, balconies, decks, terrace or roofs, green roofs, water tanks, and swimming pools, etc.

?What are the applications of cementitious waterproofing?
1. Water treatment plants
2. Sewage treatment facilities
3. Bridges
4. Dams
5. Railway and subway systems
6. Marine cargo ports and docks
7. River locks/channels
8. Parking structures
9. Tunnels

?What is liquid membrane waterproofing?

The liquid membrane consists of a primer coat and two topcoats. The application of the coatings is by spray, roller, or trowel. The liquid layer is thin and offers more flexibility than the cementitious types of waterproofing.

Categories: Concrete Cracks, Concrete Technology, How To Guide, Repair/Protection Guide
Tags: Concrete cracks, Concrete Technology, Crack Repair, How To Guide, Repair of Concrete, Repair/Maintenance, Waterproofing
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