Solutions for Waterproofing
BENTO Technology
Bentonite is a clay that has hydroexpansion properties, that is, it has the capacity to absorb water increasing its volume. Reference example: Sponge.
As it absorbs water, the bentonite expands until it reaches the maximum expansion pressure and then, being confined, it compacts and becomes an impermeable barrier.
This clay, combined with different polymers, offers a system of membranes and waterproofing joints of very easy installation.
These systems are double waterproofing since they have 2 barriers for the passage of water:
• Physical barrier of HDPE sheet (high density polyethylene)
• Bentonite barrier
Applications
Bentonite technology is commonly used in new constructions.
It is efficient to waterproof buried structures subjected to the effective water pressure.
Waterproofing in Civil Engineering and Hydraulic Works:
• Underground parking
• Basements
• Bases of foundations and retaining walls
• Inground pools, water collection sinks, lagoons
• Sewers
• Gas pipes
• Road, rail and subway tunnels
• Inspection chambers
• Elevator pits
Soil Protection:
• In places where industrial by-products are stored
• At fuel stations
• In transformation and service industries
Advantages
The main benefits of this technology are:
• Double waterproofing system (HDPE + bentonite)
• Easy to install, free of installation errors
• Applicable in contact with fresh or dry concrete. Also, on masonry. No need for particular surface preparation
• Practical placement with hammer, nail gun or stapler
• Self-sealing against eventual breaks due to the expansion property of the bentonite
• Applicable on wood or metal
• Usable in a wide range of temperatures
• Non-toxic products
• Resistance to chemical attacks and breakage. High performance to prevent the infiltration of liquid and gaseous hydrocarbons. Usable in conflicting areas with high saline, alkaline or high acidity levels
• Excellent resistance to water runoff on the membrane
• Long lasting, useful life over 100 years
• Easy to store in warehouses and on site, due to the plastic protection that surrounds the product.