Bentonite Grout Injection
Bentonite Grout Injection
Bento grout injection is an innovative, highly effective waterproofing system that stops water infiltration in existing foundation. No matter what the nature of the wall is – concrete, block, limestone, or telephone tiles – bento grout will stop the leaks. It is also used for manholes, subways, tunnels, and utility vaults. ULB-DRY Waterproofing is Chicago’s top choice for bentonite waterproofing services. If you have questions about bentonite grout injection and how it can benefit you, give our office a call.
How Does It Work?
Bento grout is a high-solid grout consisting of a proprietary blend of bentonite and natural minerals. It is specially formulated to stop leaks through existing below-grade structures. There are many benefits of using bentonite grout injection, but a primary benefit is that it is environmentally friendly and will not degrade. In fact, the bentonite grout injection lasts the life of the structure. Also, bentogrout is a pliable material, which has the ability to self-seal if the structure continues to settle. The injections can be performed from both the interior and the exterior of the property.
ULB-DRY Waterproofing routinely helps customers with the interior application of bentonite waterproofing. The process includes the following steps:
- A series of 1″ holes are drilled completely through the wall/slab in a 2’ to 3’ grid pattern.
- A custom metal packer with a ball valve is secured into each hole.
- Using a large tow behind machine (for ventilated areas) or electric (for interior applications) a slurry of bento grout is injected through the wall creating a seal on the exterior.
- The injection will continue into each packer until the material is noted at an adjacent packer or the backpressure is too great to continue.
- Once all the injection is completed, the holes are capped with a light grey waterproof mortar.
- Any material that may have oozed out onto the floor slab or above grade will be scraped up and removed.
Our experts have extensive experience in the exterior application of bentonite grout injection as well. This process includes the following steps:
- A series of spud holes are created next to the foundation. Normally these holes are spread 2’ apart and 6” off the wall.
- An injection rod is placed into the spud hole.
- Using a large tow behind machine, a slurry of bento grout is injected down next to the foundation.
- To ensure the best possible coverage, the injection rod is slowly raised out of the ground during the injection process.
- Any material that may have oozed out of the ground will be scraped up and removed.