Waterproofing structures: a necessity in the era of climate change

Climate change is intensifying extreme weather events, such as torrential rains and rising groundwater levels. This scenario makes it essential to adopt effective solutions for the waterproofing of structures right from the design and construction phase, in order to prevent water infiltration that can compromise the durability and safety of buildings.

Inadequate waterproofing can lead to water infiltration in underground structures, causing significant damage such as:

• Compromised structural integrity: water can degrade concrete and corrode reinforcements, reducing the load-bearing capacity of the building.
• Internal dampness problems: water infiltration can cause mould and mildew to form, posing health risks to occupants.
• High maintenance costs: repairs to fix infiltration problems can be costly and not always permanent.

To ensure long-lasting waterproofing of underground structures, Proind Ltd offers innovative solutions such as bentonite sheets, hydro-expanding joints and waterproofing additives for concrete.

Bentonite sheets are micro-stitched membranes composed of natural sodium bentonite, a clay that expands when in contact with water, forming an impermeable gel. This characteristic makes them particularly suitable for waterproofing structures in direct contact with the ground, such as foundations, tunnels and underground car parks. The main advantages of the sheets include:

• Self-sealing: the expansion capacity of bentonite allows any cracks or micro-cracks to be sealed automatically.
• Ease of installation: the sheets can be applied to both dry and wet surfaces without the need for primers or special preparations.
• Durability: they are resistant to chemicals present in the ground and maintain their properties over time.

The BT 100 JOINT is a curb made of natural sodium bentonite and butyl rubber used to seal concrete joints in reinforced concrete structures below ground level. Its advantages include:

• Controlled expansion: capable of swelling to its maximum degree of expansion without losing consistency.
• Safe installation: delayed expansion allows installation even in difficult weather conditions.
• Environmental safety: the bentonite and butyl rubber compound can come into contact with drinking water without causing pollution.

The SIRIOBETON STOP additive is an advanced solution for treating concrete, capable of improving its impermeability and resistance to external agents. Added directly to the mixture, it creates a protective barrier within the cement matrix, reducing porosity and preventing water penetration. Its advantages are:

• Protection against moisture and freeze-thaw cycles
• Improved concrete durability
• Reduced maintenance requirements over time

EXPANDER K1 is a polyurethane designed to seal cracks, even in the presence of water, crevices and joints in concrete structures, ensuring excellent adhesion and effective waterproofing. Thanks to its formula, it expands slightly after application, filling any cavities and preventing water infiltration. The main advantages include:

• Superior adhesion to cementitious surfaces
• Controlled expansion for optimal sealing
• High resistance to chemicals and atmospheric agents

In the current climate, characterised by extreme and unpredictable weather events, it is essential to adopt effective waterproofing solutions from the earliest stages of construction. The combined use of BENTOGEO GRIP bentonite sheets, GIUNTO BT 100, the SIRIOBETON STOP additive and the EXPANDER K1 offered by Proind is a strategic choice for protecting underground structures from water infiltration, ensuring durability, safety and reduced maintenance costs in the long term.