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dariyasite · 5 months

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Application of bitumen in building

Bitumen has numerous applications in the construction industry, primarily serving as an adhesive and waterproofing material. Its versatile properties make it indispensable in various building-related functions. Here are some key applications of bitumen in construction:

1. Roofing and Waterproofing:

Bitumen 60/70 is extensively used in roofing systems to provide waterproof membranes for flat roofs. Traditional bitumen roofing membranes consist of layers of bitumen sprayed with aggregate, with a carrier fabric made of polyester or glass in between. Polymer-modified bitumen sheets have become the standard for flat roof waterproofing. Bituminous roofing membranes can also be recycled easily, enhancing their sustainability.

2. Wall Sealing:

Bitumen 60/70 plays a crucial role in sealing walls, providing protection against water and moisture intrusion. It is applied to substrates such as bathrooms and toilets, which are constantly exposed to moisture, to prevent water penetration and safeguard the underlying structures.

3. Floor and Wall Insulation:

Bitumen 80/100 insulation is widely employed for building waterproofing, both horizontally and vertically. It effectively prevents water penetration into floorboards and walls, offering reliable protection. Bitumen's chemical and physical properties make it easy to work with and highly durable.

4. Sound Insulation:

Bitumen's sound-absorbing properties find applications beyond construction. It helps reduce noise transmission, such as the sound of footsteps under floor coverings. Special tar mats in cars and elevators utilize Bitumen 80/100 for sound insulation.

5. Electrical Cable Insulation:

Bitumen's low electrical conductivity makes it suitable for use as an insulating material for electrical cables. It helps protect the cables and prevent electrical hazards.

6. Other Uses:

Bitumen 80/100 & bitumen 60/70 finds application in various other areas, such as the paper industry and the manufacturing of paints and varnishes. Its thermal insulation properties are beneficial in different contexts.

From an ecological standpoint, bitumen is highly regarded for its long lifespan. It remains a popular construction material, with significant demand both domestically and in international markets. The producer of bitumen in Iran exports a large percentage of its production to other countries such as Singapore, Dubai, Panama.

In residential construction, plastic-modified bitumen (KMB) coatings are commonly used for insulation. They compete with bitumen-free FPD (Flexible Polymer Disc) seals, which are easier to apply and offer faster repair options.

Overall, the applications of bitumen in the construction industry are extensive, ranging from roofing and waterproofing to sound insulation and electrical cable insulation. Its versatility and durability make it a valuable material in various building-related functions.

Important Considerations Before Using Bitumen:

1. Surface Preparation:

Before applying bitumen, it is crucial to ensure that the surface is clean, dry, and free from any contaminants. Even the presence of dust, dirt, or grease can hinder the adhesion of the bitumen coating and compromise the effectiveness of the seal. Additionally, the surface should be free from frost. If there are old incompatible coatings, they must be removed. In the case of older buildings, previous applications of bituminous paints may not provide a suitable surface for polymer-modified bitumen (PMB) coatings.

2. Repairing Cracks and Unevenness:

Prior to applying bitumen, any cracks or unevenness on the surface should be repaired using appropriate materials like repair mortar or leveling compounds. This ensures a smooth and uniform surface, promoting better adhesion and a more effective seal.

3. Additional Preparatory Measures:

In some cases, additional preparatory measures may be necessary. One option is to use a layer of synthetic resin on the coarse-pored bed or to apply a sealing slurry. A sealing slurry is a waterproof mixture of cement and plastic that allows water vapor to pass through. The advantage of using a sealing slurry is that it can adhere well to old bituminous coatings, providing an ideal substrate for applying a thick new bituminous coating.

By following these steps and ensuring proper surface preparation, you can optimize the adhesion and effectiveness of bitumen coatings in various applications.

What are the suitable means for repairing cracks and unevenness on the surface before applying bitumen?

There are several suitable means for repairing cracks and unevenness on the surface before applying bitumen. The choice of repair method depends on the severity of the damage and the specific requirements of the project. Here are some common methods for repairing cracks and unevenness:

1. Crack Fillers and Sealants:

For smaller cracks, crack fillers or sealants can be used. These materials, such as asphalt-based crack fillers or specialized concrete crack sealants, are designed to fill and seal cracks, preventing water infiltration and further damage. They are typically applied using a caulk gun or trowel.

2. Repair Mortar:

Repair mortars are suitable for filling larger cracks, holes, or areas of unevenness. These mortars are made from a blend of cement, sand, and additives to enhance adhesion and strength. They can be mixed with water to create a workable paste and then applied to the damaged areas using a trowel or other appropriate tools. Repair mortars are commonly used for repairing concrete surfaces.

3. Leveling Compounds:

Leveling compounds, also known as self-leveling underlayments or floor levelers, are used to create a smooth and level surface. These compounds are typically made from a blend of cement, fine aggregates, and additives. They have a fluid consistency that allows them to flow and self-level over uneven areas. Leveling compounds are commonly used to repair uneven concrete or subfloor surfaces before applying flooring materials.

4. Patching Mixtures:

Patching mixtures, such as asphalt patching compounds or repair mixes, are specifically designed for repairing asphalt surfaces. They typically contain a combination of asphalt binder, aggregates, and additives. These mixtures can be applied to fill potholes, repair damaged areas, or smooth out unevenness in asphalt surfaces.

5. Resurfacing:

In cases where the damage or unevenness is more extensive, resurfacing the entire surface may be necessary. This involves applying a new layer of bitumen or asphalt mixture over the existing surface to create a smooth and uniform finish. Resurfacing can help address multiple issues, including cracks, potholes, and unevenness.

It's important to follow the manufacturer's instructions and best practices when using any repair materials. Additionally, proper surface preparation, including cleaning and removing loose debris, is essential before applying any repair method.

ATDM CO is a manufacturer and exporter of Bitumen 60/70, offering three different quality grades available in drums, bags, and bulk quantities. Our products are classified into premium, second, and third types, each with varying production costs and facilities. We provide a wide range of options to accommodate different customer needs and volume requirements.

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