Portfolio: Block Wall Elevator Pit Fully Waterproofed

The challenging aspect of repairing elevator shafts is having to work from the negative side (inside), for obvious reasons. There were leaks through floor-wall cold joints and floor cracks. Floor-wall Cold Joints The following procedure was applied to repair these cold joints:

• All of the corners were cut into the corner and adhesive was injected.

• Patching material was applied, while the adhesive was still curing.

• Polyforce Plus Primer was painted over the patching.

• Fiberglass was installed to cover the corners.

• Finally, fiberglass was painted with basalt for further reinforcement and protection. 

Floor Cracks 

If crack repair is needed, the following process is applied: 

1. Cracks are routed with a saw to create a V-groove to prep the area for repair. 

2. The crack is filled with Polyforce Plus Adhesive which ensures immediate and durable monolithic adhesion. 

3. The crack is patched with the Polyforce Polymer Cement. 

4. Waterproofing Polyforce Plus Primer is applied over the area. 

Polyforce Plus Adhesive was used to stop immediate leaks, followed by concrete patching and crack repair. Fiberglass, combined with Polyforce Plus Basalt application, was applied over the floor-wall joints to reinforce the corners. 

Floor Patching 

Under traditional repair methods, patching requires a minimum of two-inch demolition in the affected area. The use of our unique products, Polyforce Plus Adhesive, and Polyforce Polymer Cement, permits thin-patch applications, making the job much more cost-efficient and faster. 

Our patching process is as follows: 

1. Delaminated and unsound concrete is removed. 

2. Polyforce Plus Adhesive is applied as an adhesive layer. Its impressive 1.85 MPa adhesive strength ensures monolithic adhesion. 

3. Within 40 minutes, the actual patch is applied. On very thin patches (less than a ¼ of an inch), Polyforce Polymer Cement is used; otherwise, regular cement. 

Piston Waterproofing 

Waterproofing a piston also requires a series of steps. 

The following procedure was applied: 

1. The accumulated liquid (water mixed with oil) was pumped out of the cylinder that surrounds the piston housing. 

2. The drained area was cleaned. 

3. Finally, the space was injected with a soft rubber material, which ensures permanent waterproofing. 

Block Wall Waterproofing 

Block walls naturally accumulate water coming in from the environment. To achieve permanent waterproofing, a series of steps is taken. 

Our procedure entails the following: 

1. Holes were drilled in the blocks. 

2. Drainage tubes were installed into every hole and connected to the floor drain, ensuring constant elimination of liquid. 

3. Polyforce Plus Primer was applied to ensure permanent surface waterproofing. 

TECHNICAL DETAILS 

Polyforce Plus Adhesive 

The use of specialized product, Polyforce Plus Adhesive, permits restoration of the carrying capacity of the slab through monolithic concrete patching and crack repair, providing an alternative to complete slab recasting. Polyforce Plus coating is tested to provide 25 years of freeze and thaw waterproofing with no degradation and water permeation. 

This material is rated to expand and contract with concrete, ensuring long-lasting adhesion of concrete patches due to its impressive 1.85 MPa adhesive strength (compared to 1.2 MPa tensile strength of the original concrete). This makes the patch and the old concrete slab work as one. Polyforce Plus, when mixed with basalt, achieves compressive strength of 150 MPa, making it ideal for surfaces that suffer high mechanical intrusion or increased and prolonged exposure to light acids. 

Versatility of application and high strength of installation produce significant cost savings, when compared to traditional concrete repairs. 

Polyforce Polymer Cement 

Polymer Cement was designed for fast and thin patch applications. When combining patch application of Polymer Cement with high-strength industrial concrete adhesives, many applications which would otherwise be too expensive to execute become cost-effective and feasible. Most typical applications include valley resurfacing, slope reversals, crack repair patches, and stair and balcony repairs. Polymer Cement is designed to perform in thicknesses ranging from 0.01 inches to 0.25 and beyond. The material performs at 99% dry finish volume. 

Polyforce Plus Primer 

High-strength concrete primer is designed for two purposes: concrete waterproofing membrane and primer adhesive layer. 

• Surface application of Polyforce Primer provides Waterproof Concrete Embedded Membrane rated to withstand 25 years of freeze and thaw cycles. 

• Increased adhesive qualities of the primer eliminate surface debonding of top coat paint application.

 Polyforce Plus, when mixed with basalt, achieves compressive strength of 150 MPa, making it ideal for surfaces that suffer high mechanical intrusion or increased and prolonged exposure to light acids. Versatility of application and high strength of installation produce significant cost savings, when compared to traditional concrete repairs.