RESIDENTIAL HOUSE IN OBOLONSKYI DISTRICT, KYIV

A concrete apron is more than just a path around a house; it’s the foundation’s first line of defense against surface water. In this project, the deterioration of this element led to a risk of basement flooding, requiring prompt engineering intervention.

Reason for contacting: Alarming symptoms of precipitation

The homeowner contacted us after discovering a series of problems threatening the integrity of the building:

• Noticeable subsidence of the blind area slab relative to the base.
• A rupture in the concrete surface, through which rainwater began to freely penetrate to the foundation.
• A direct consequence of the breach in the seal of the blind area is the active wetting of the walls in the basement.

Technical inspection: The Hidden Threat Beneath the Concrete

To accurately determine the causes of the deformation, specialists conducted dynamic ground probingThe inspection results revealed critical defects:

1. The soil used for backfill during construction was not properly compacted. Over time, it “settled” under its own weight and the effects of moisture.
2. Caverns and air lenses with a depth ofup to 10 cmThis deprived the structure of support, which led to its cracking and subsidence.

Technical Solution: Synergy of GeoResin Deep Lifting and Floor Lifting

Conventional repairs would have been futile in this situation, as the cause lay in the soil’s instability. A decision was made to use a two-stage geopolymer technology.

1. Deep Lifting

The goal was to create a secure foundation under the slab and along the basement walls.

Geopolymer was introduced into the loose backfill soil to a depth of up to the basement floor level.This made it possible to stop further settling and create a “vertical barrier” from the water.

2. Filling voids and leveling (Floor Lifting)

After stabilizing the lower layers, engineers moved on to restoring the blind area itself.Geopolymer under pressure filled 10-centimeter voids under the concrete, ensuring 100% slab-to-soil contact.

Implementation Features and Key Works

During the project area80.2 m²The following engineering tasks were completed:

• Compaction of soil and filling of voids under the blind area and along the basement walls.
• Leveling the blind area:PThe lit was smoothly returned to its design position, restoring the necessary slope to drain water away from the house.
• Light well stabilization:The basement window well structures, which had also begun to sag, were reinforced and fixed in their design position.
• Sealing of joints:Injection into the areas where the blind area meets the walls allowed for reliable waterproofing, preventing water from entering the basement.

Benefits for the owner

• Without excavation work:There was no need to dismantle the old blind area, dig trenches or use heavy equipment.
• Cleanliness and aesthetics:All work was carried out through micro-holes with a diameter of 12–16 mm, which are practically invisible after sealing.
• Speed:The entire work package was completed in the shortest possible time without disrupting the residents’ daily routine.
• Durability:Georesin geopolymer retains its properties for decades.

This case clearly demonstrates that the problem of a waterlogged basement often needs to be addressed not from the inside, but from the outside, by eliminating voids in the soil. Geopolymer injection allows you to transform loose backfill into a reliable protective shield for the foundation.

WORKS ARE PERFORMED WITHOUT STOPPING THE BUILDING OPERATION